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Difference From:
[fab15b88a6] tweaks to mmu.s (net) and tty.c (raw mode) (user: pnr tags: trunk, date: 2020-01-27 18:17:23)
To:
[b95342aaa8] Proof of concept local IPC (user: pnr tags: FSS, date: 2020-05-18 19:59:04)
Changes to ccom/c11.c.
1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 |
outname(s);
printf("%s:\n", s);
break;
case RLABEL:
outname(s);
printf("%s:\n", s);
break;
case BRANCH:
branch(geti(), 0, 0);
break;
case SETREG:
|
> |
1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 |
outname(s);
printf("%s:\n", s);
break;
case RLABEL:
outname(s);
printf("%s:\n", s);
printf("~~%s:\n", s+1);
break;
case BRANCH:
branch(geti(), 0, 0);
break;
case SETREG:
|
Changes to v6/Makefile.
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 |
UFS = ${INSTDIR}/bin/ufs
ASMOBJS = low.o mch.o mmu.o thunk.o drv_cf.o
UV6OBJS = alloc.o bio.o clock.o conf.o drv_tty.o tty.o dsk.o fio.o iget.o mem.o nami.o \
pipe.o prf.o rdwri.o sig.o slp.o subr.o sys1.o sys2.o sys3.o sys4.o sysent.o \
trap.o main.o malloc.o
.c.o:
${CC} -c -DKERNEL -D${MODEL} -O -o $@ $<
.s.o:
${AS} -u -o $@ $<
all: unix strip
|
| |
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 |
UFS = ${INSTDIR}/bin/ufs
ASMOBJS = low.o mch.o mmu.o thunk.o drv_cf.o
UV6OBJS = alloc.o bio.o clock.o conf.o drv_tty.o tty.o dsk.o fio.o iget.o mem.o nami.o \
pipe.o prf.o rdwri.o sig.o slp.o subr.o sys1.o sys2.o sys3.o sys4.o sysent.o \
trap.o main.o malloc.o pair.o
.c.o:
${CC} -c -DKERNEL -D${MODEL} -O -o $@ $<
.s.o:
${AS} -u -o $@ $<
all: unix strip
|
Changes to v6/alloc.c.
174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 |
fp = getfs(dev);
while(fp->s_ilock)
sleep(&fp->s_ilock, PINOD);
loop:
if(fp->s_ninode > 0) {
ino = fp->s_inode[--fp->s_ninode];
ip = iget(dev, ino);
if (ip==NULL)
return(NULL);
if(ip->i_mode == 0) {
for(dp = &ip->i_mode; dp < &ip->i_addr[8];)
*dp++ = 0;
fp->s_fmod = 1;
return(ip);
|
| |
174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 |
fp = getfs(dev);
while(fp->s_ilock)
sleep(&fp->s_ilock, PINOD);
loop:
if(fp->s_ninode > 0) {
ino = fp->s_inode[--fp->s_ninode];
ip = iget(dev, ino, 0);
if (ip==NULL)
return(NULL);
if(ip->i_mode == 0) {
for(dp = &ip->i_mode; dp < &ip->i_addr[8];)
*dp++ = 0;
fp->s_fmod = 1;
return(ip);
|
Changes to v6/conf.c.
42 43 44 45 46 47 48 |
};
/* root file system device = {0, 0} */
int rootdev = 0;
/* start of swap space */
int swplo = NBLKS;
|
> > > > > > > > > > > > > > > > > > > > > > |
42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 |
};
/* root file system device = {0, 0} */
int rootdev = 0;
/* start of swap space */
int swplo = NBLKS;
extern int ufs_nami();
extern struct inode* openi(), nullopn();
/*
extern int prput(), prfree(), prupdat(), prread(), prwrite(), prtrunc();
extern int prstat(), prnami(), prmount(), prioctl();
extern struct inode *prget();
*/
extern nulldev(), nodev(), rdpair(), wrpair(), frepair();
extern struct inode *getpair();
extern sfsput(), sfsrd(), sfswr(), sfsnam(), sfsstat(), sfsfree();
extern struct inode *sfsget(), *sfsopn();
struct fstypsw fstypsw[3] = {
{ 0, 0, 0, 0, 0, 0, 0, 0, ufs_nami, 0, 0, openi},
/* { prput, prget, prfree, prupdat, prread, prwrite, prtrunc,
prstat, prnami, prmount, prioctl}, */
{ nulldev, getpair, frepair, nulldev, rdpair, wrpair, nulldev, nulldev, nodev, nodev, nulldev, nullopn },
{ sfsput, sfsget, sfsfree, nulldev, sfsrd, sfswr, nulldev, sfsstat, sfsnam, nodev, nulldev, sfsopn }
};
int nfstyp = 3;
|
Changes to v6/conf.h.
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} cdevsw[]; /* * Number of character switch entries. * Set by cinit/tty.c */ int nchrdev; |
> > > > > > > > > > > > > > > > > > |
49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 |
} cdevsw[]; /* * Number of character switch entries. * Set by cinit/tty.c */ int nchrdev; /* file system types */ struct fstypsw { int (*t_put)(); struct inode *(*t_get)(); int (*t_free)(); int (*t_updat)(); int (*t_read)(); int (*t_write)(); int (*t_trunc)(); int (*t_stat)(); int (*t_nami)(); int (*t_mount)(); int (*t_ioctl)(); struct inode *(*t_open)(); } fstypsw[]; int nfstyp; |
Changes to v6/fio.c.
105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 ... 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 ... 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 |
/* * openi called to allow handler * of special files to initialize and * validate before actual IO. * Called on all sorts of opens * and also on mount. */ void openi(ip, rw) register struct inode *ip; { register int dev, maj; dev = ip->i_addr[0]; maj = ip->i_addr[0].d_major; ................................................................................ (*cdevsw[maj].d_open)(dev, rw); break; case IFBLK: if(maj >= nblkdev) goto bad; (*bdevsw[maj].d_open)(dev, rw); } return; bad: u.u_error = ENXIO; } /* * Check mode permission on inode pointer. ................................................................................ */ struct inode* owner() { register struct inode *ip; extern int uchar(); if ((ip = namei(uchar, 0)) == NULL) return(NULL); if(u.u_uid == ip->i_uid) return(ip); if (suser()) return(ip); iput(ip); return(NULL); |
| | | |
105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 ... 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 ... 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 |
/* * openi called to allow handler * of special files to initialize and * validate before actual IO. * Called on all sorts of opens * and also on mount. */ struct inode * openi(ip, rw) register struct inode *ip; { register int dev, maj; dev = ip->i_addr[0]; maj = ip->i_addr[0].d_major; ................................................................................ (*cdevsw[maj].d_open)(dev, rw); break; case IFBLK: if(maj >= nblkdev) goto bad; (*bdevsw[maj].d_open)(dev, rw); } return ip; bad: u.u_error = ENXIO; } /* * Check mode permission on inode pointer. ................................................................................ */ struct inode* owner() { register struct inode *ip; extern int uchar(); if ((ip = namei(uchar, NI_SEARCH, 0)) == NULL) return(NULL); if(u.u_uid == ip->i_uid) return(ip); if (suser()) return(ip); iput(ip); return(NULL); |
Changes to v6/iget.c.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 .. 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 .. 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 ... 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 ... 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 ... 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 ... 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 |
#include "param.h" #include "systm.h" #include "user.h" #include "inode.h" #include "filsys.h" #include "buf.h" /* * Look up an inode by device,inumber. * If it is in core (in the inode structure), * honor the locking protocol. * If it is not in core, read it in from the * specified device. * If the inode is mounted on, perform * the indicated indirection. * In all cases, a pointer to a locked ................................................................................ * printf warning: no inodes -- if the inode * structure is full * panic: no imt -- if the mounted file * system is not in the mount table. * "cannot happen" */ struct inode * iget(dev, ino) int dev; int ino; { register struct inode *p; struct inode *freeip; struct buf *bp; register struct mount *mp; register struct dinode *dp; register int i; loop: freeip = NULL; for(p = &inode[0]; p < &inode[NINODE]; p++) { if(dev==p->i_dev && ino==p->i_number) { if((p->i_flag&ILOCK) != 0) { p->i_flag |= IWANT; sleep(p, PINOD); goto loop; } if((p->i_flag&IMOUNT) != 0) { for(mp = &mount[0]; mp < &mount[NMOUNT]; mp++) if(mp->m_inodp == p) { dev = mp->m_dev; ino = ROOTINO; goto loop; } panic("mount table failure"); } p->i_count++; p->i_flag |= ILOCK; return(p); ................................................................................ if((p = freeip) == NULL) { printf("Inode table overflow\n"); u.u_error = ENFILE; return(NULL); } p->i_dev = dev; p->i_number = ino; p->i_flag = ILOCK; p->i_count++; p->i_lastr = -1; bp = bread(dev, (ino+31)>>4); if (bp->b_flags&B_ERROR) { brelse(bp); iput(p); return(NULL); ................................................................................ * write the inode out and if necessary, * truncate and deallocate the file. */ void iput(rp) register struct inode *rp; { if(rp->i_count == 1) { rp->i_flag |= ILOCK; if(rp->i_nlink <= 0) { itrunc(rp); rp->i_mode = 0; ifree(rp->i_dev, rp->i_number); } iupdat(rp, &time); prele(rp); rp->i_flag = 0; rp->i_number = 0; } rp->i_count--; prele(rp); } /* * Check accessed and update flags on ................................................................................ * an inode structure. * If either is on, update the inode * with the corresponding dates * set to the argument tm. */ void iupdat(p, tm) struct inode *p; unsigned long *tm; { register struct buf *bp; register struct dinode *dp; int i; if((p->i_flag&(IUPD|IACC)) != 0) { if(getfs(p->i_dev)->s_ronly) return; i = p->i_number+31; bp = bread(p->i_dev, i>>4); dp = (struct dinode*) (bp->b_addr + 32 * (i & 017)); /* Copy kernel format to disk format */ dp->d_mode = p->i_mode; ................................................................................ */ void itrunc(p) register struct inode *p; { struct buf *bp, *dp; register int *cp, *ep, *ap; if((p->i_mode&(IFCHR&IFBLK)) != 0) return; for(ap = &p->i_addr[7]; ap >= &p->i_addr[0]; ap--) { if(*ap == 0) continue; /* if each address is an indirect block ... */ if((p->i_mode&ILARG) != 0) { bp = bread(p->i_dev, *ap); /* ... free its 512 pointers */ ................................................................................ if (ip==NULL) return(NULL); ip->i_flag |= IACC|IUPD; ip->i_mode = mode | IALLOC; ip->i_nlink = 1; ip->i_uid = u.u_uid; ip->i_gid = u.u_gid; wdir(ip); return(ip); } /* * Write a directory entry with * parameters left as side effects * to a call to namei. */ void wdir(ip) struct inode *ip; { u.u_dent.u_ino = ip->i_number; memcpy(&u.u_dent.u_name[0], &u.u_dbuf[0], DIRSIZ); u.u_count = DIRSIZ + 2; u.u_base = (char*) &u.u_dent; u.u_segflg++; writei(u.u_pdir); u.u_segflg--; iput(u.u_pdir); } |
> < | | | | > | | | > > > > > > > | > > > | | | | > > > | > | | > > > > > > > > | | | | | | |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 .. 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 .. 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 ... 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 ... 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 ... 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 ... 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 |
#include "param.h" #include "systm.h" #include "user.h" #include "inode.h" #include "filsys.h" #include "buf.h" #include "conf.h" /* * Look up an inode by device,inumber,fstype * If it is in core (in the inode structure), * honor the locking protocol. * If it is not in core, read it in from the * specified device. * If the inode is mounted on, perform * the indicated indirection. * In all cases, a pointer to a locked ................................................................................ * printf warning: no inodes -- if the inode * structure is full * panic: no imt -- if the mounted file * system is not in the mount table. * "cannot happen" */ struct inode * iget(dev, ino, fstyp) register int dev; register int ino; register int fstyp; { register struct inode *p; struct inode *freeip; struct buf *bp; register struct mount *mp; register struct dinode *dp; register int i; loop: freeip = NULL; for(p = &inode[0]; p < &inode[NINODE]; p++) { if(dev==p->i_dev && ino==p->i_number && fstyp==p->i_fstyp) { if((p->i_flag&ILOCK) != 0) { p->i_flag |= IWANT; sleep(p, PINOD); goto loop; } if((p->i_flag&IMOUNT) != 0) { for(mp = &mount[0]; mp < &mount[NMOUNT]; mp++) if(mp->m_inodp == p) { dev = mp->m_dev; ino = ROOTINO; fstyp = mp->m_fstyp; goto loop; } panic("mount table failure"); } p->i_count++; p->i_flag |= ILOCK; return(p); ................................................................................ if((p = freeip) == NULL) { printf("Inode table overflow\n"); u.u_error = ENFILE; return(NULL); } p->i_dev = dev; p->i_number = ino; p->i_fstyp = fstyp; p->i_flag = ILOCK; p->i_count++; if(fstyp) return((*fstypsw[fstyp].t_get)(fstyp, dev, ino, p)); p->i_lastr = -1; bp = bread(dev, (ino+31)>>4); if (bp->b_flags&B_ERROR) { brelse(bp); iput(p); return(NULL); ................................................................................ * write the inode out and if necessary, * truncate and deallocate the file. */ void iput(rp) register struct inode *rp; { register int fstyp; if(rp->i_count == 1) { rp->i_flag |= ILOCK; fstyp = rp->i_fstyp; if(rp->i_nlink <= 0) if(fstyp) (*fstypsw[fstyp].t_free)(rp); else { itrunc(rp); rp->i_mode = 0; ifree(rp->i_dev, rp->i_number); } if(fstyp) (*fstypsw[fstyp].t_put)(rp); else iupdat(rp, &time); prele(rp); rp->i_flag = 0; rp->i_number = 0; rp->i_fstyp = 0; } rp->i_count--; prele(rp); } /* * Check accessed and update flags on ................................................................................ * an inode structure. * If either is on, update the inode * with the corresponding dates * set to the argument tm. */ void iupdat(p, tm) register struct inode *p; unsigned long *tm; { register struct buf *bp; register struct dinode *dp; register int i, fstyp; if((p->i_flag&(IUPD|IACC)) != 0) { if((fstyp = p->i_fstyp)) { (*fstypsw[fstyp].t_updat)(p, tm); return; } if(getfs(p->i_dev)->s_ronly) return; i = p->i_number+31; bp = bread(p->i_dev, i>>4); dp = (struct dinode*) (bp->b_addr + 32 * (i & 017)); /* Copy kernel format to disk format */ dp->d_mode = p->i_mode; ................................................................................ */ void itrunc(p) register struct inode *p; { struct buf *bp, *dp; register int *cp, *ep, *ap; register int fstyp; if((p->i_mode&(IFCHR&IFBLK)) != 0) return; if((fstyp = p->i_fstyp)) { (*fstypsw[fstyp].t_trunc)(p); return; } for(ap = &p->i_addr[7]; ap >= &p->i_addr[0]; ap--) { if(*ap == 0) continue; /* if each address is an indirect block ... */ if((p->i_mode&ILARG) != 0) { bp = bread(p->i_dev, *ap); /* ... free its 512 pointers */ ................................................................................ if (ip==NULL) return(NULL); ip->i_flag |= IACC|IUPD; ip->i_mode = mode | IALLOC; ip->i_nlink = 1; ip->i_uid = u.u_uid; ip->i_gid = u.u_gid; wdir(ip->i_number); return(ip); } /* * Write a directory entry with * parameters left as side effects * to a call to namei. */ void wdir(ino) int ino; { u.u_dent.u_ino = ino; memcpy(&u.u_dent.u_name[0], &u.u_dbuf[0], DIRSIZ); u.u_count = DIRSIZ + 2; u.u_base = (char*) &u.u_dent; u.u_segflg++; writei(u.u_pdir); u.u_segflg--; iput(u.u_pdir); } |
Changes to v6/inode.h.
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char i_count; /* reference count */ int i_dev; /* device where inode resides */ int i_number; /* i number, 1-to-1 with device address */ int i_mode; char i_nlink; /* directory entries */ char i_uid; /* owner */ char i_gid; /* group of owner */ char i_fill; /* explicit alignment filler */ unsigned long i_size; /* file size in bytes */ int i_addr[8]; /* device addresses constituting file */ int i_lastr; /* last logical block read (for read-ahead) */ } inode[NINODE]; /* flags */ #define ILOCK 01 /* inode is locked */ ................................................................................ /* inode function prototypes */ #ifdef KERNEL struct inode *ialloc(); struct inode *namei(); struct inode *iget(); struct inode *maknode(); void ifree(); void openi(); void closei(); void iput(); void iupdat(); void itrunc(); void readi(); void writei(); void wdir(); int bmap(); int access(); #endif |
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char i_count; /* reference count */ int i_dev; /* device where inode resides */ int i_number; /* i number, 1-to-1 with device address */ int i_mode; char i_nlink; /* directory entries */ char i_uid; /* owner */ char i_gid; /* group of owner */ char i_fstyp; /* filesystem type */ unsigned long i_size; /* file size in bytes */ int i_addr[8]; /* device addresses constituting file */ int i_lastr; /* last logical block read (for read-ahead) */ } inode[NINODE]; /* flags */ #define ILOCK 01 /* inode is locked */ ................................................................................ /* inode function prototypes */ #ifdef KERNEL struct inode *ialloc(); struct inode *namei(); struct inode *iget(); struct inode *maknode(); void ifree(); struct inode *openi(); void closei(); void iput(); void iupdat(); void itrunc(); void readi(); void writei(); void wdir(); int bmap(); int access(); #define NI_SEARCH 0 /* find file */ #define NI_CREAT 1 /* find file, create if it doesn't exist */ #define NI_UNLINK 2 /* unlink file */ #define NI_MKNOD 3 /* create node, error if it already exists */ #define NI_LINK 4 /* make a link, error if exists */ struct state { struct inode *dp; /* search dir */ char c; /* current path char */ int param; /* creation parameter */ }; #endif |
Changes to v6/main.c.
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0xc7c0, 0x64f,
0x0200, BOTUSR+0x18,
0xc7c0, 0x2c60, 11,
0x10ff, BOTUSR+0x18, 0x000,
0x2f65, 0x7463, 0x2f69, 0x6e69, 0x7400
};
/*
* Initialization code, called from mch.S as soon as a stack
* has been established.
* Functions:
* hand craft 0th process
* call all initialization routines
* fork - process 0 to schedule
................................................................................
proc[0].p_flag |= SLOAD|SSYS;
u.u_procp = &proc[0];
/* set up 'known' i-nodes */
cinit();
binit();
iinit();
rootdir = iget(rootdev, ROOTINO);
rootdir->i_flag &= ~ILOCK;
u.u_cdir = iget(rootdev, ROOTINO);
u.u_cdir->i_flag &= ~ILOCK;
/*
* make init process
* enter scheduling loop
* with system process
*/
if(newproc()) {
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0xc7c0, 0x64f, 0x0200, BOTUSR+0x18, 0xc7c0, 0x2c60, 11, 0x10ff, BOTUSR+0x18, 0x000, 0x2f65, 0x7463, 0x2f69, 0x6e69, 0x7400 }; int prmount(); /* * Initialization code, called from mch.S as soon as a stack * has been established. * Functions: * hand craft 0th process * call all initialization routines * fork - process 0 to schedule ................................................................................ proc[0].p_flag |= SLOAD|SSYS; u.u_procp = &proc[0]; /* set up 'known' i-nodes */ cinit(); binit(); iinit(); rootdir = iget(rootdev, ROOTINO, 0); rootdir->i_flag &= ~ILOCK; u.u_cdir = iget(rootdev, ROOTINO, 0); u.u_cdir->i_flag &= ~ILOCK; /* set up '/proc' fs */ prmount(2, "/proc", 0); /* * make init process * enter scheduling loop * with system process */ if(newproc()) { |
Changes to v6/nami.c.
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#include "param.h" #include "inode.h" #include "user.h" #include "systm.h" #include "buf.h" /* * Convert a pathname into a pointer to * an inode. Note that the inode is locked. * * func = function called to get next char of name * &uchar if name is in user space * &schar if name is in system space * flag = 0 if name is saught * 1 if name is to be created * 2 if name is to be deleted */ struct inode * namei(func, flag) int (*func)(); int flag; { register struct inode *dp; register int c; register char *cp; int eo; struct buf *bp; /* * If name starts with '/' start from * root; otherwise start from current dir. */ dp = u.u_cdir; if((c=(*func)()) == '/') dp = rootdir; iget(dp->i_dev, dp->i_number); while(c == '/') c = (*func)(); if(c == '\0' && flag != 0) { u.u_error = ENOENT; goto out; } cloop: /* * Here dp contains pointer * to last component matched. */ if(u.u_error) goto out; if(c == '\0') return(dp); /* * If there is another component, * dp must be a directory and * must have x permission. */ if((dp->i_mode&IFMT) != IFDIR) { u.u_error = ENOTDIR; goto out; } if(access(dp, IEXEC)) goto out; /* * Gather up name into * users' dir buffer. */ cp = &u.u_dbuf[0]; while(c!='/' && c!='\0' && u.u_error==0) { ................................................................................ *cp++ = c; c = (*func)(); } while(cp < &u.u_dbuf[DIRSIZ]) *cp++ = '\0'; while(c == '/') c = (*func)(); if(u.u_error) goto out; /* * Special handling for ".." allowing chdir out of mounted * file system. We know NMOUNT == 2. */ if (u.u_dbuf[0]=='.' && u.u_dbuf[1]=='.' && u.u_dbuf[2]=='\0' && dp->i_number == ROOTINO && dp->i_dev == mount[1].m_dev && mount[1].m_inodp != 0) { iput(dp); dp = mount[1].m_inodp; dp->i_count++; } /* * Set up to search a directory. */ u.u_offset = 0; eo = 0; /* u.u_segflg = 1; */ u.u_count = dp->i_size >> 4; bp = NULL; eloop: /* * If at the end of the directory, * the search failed. Report what * is appropriate as per flag. */ if(u.u_count == 0) { if(bp != NULL) brelse(bp); if(flag==1 && c=='\0') { if(access(dp, IWRITE)) goto out; u.u_pdir = dp; if(eo) u.u_offset = eo-DIRSIZ-2; else dp->i_flag |= IUPD; return(NULL); } u.u_error = ENOENT; goto out; } /* * If offset is on a block boundary, * read the next directory block. * Release previous if it exists. */ if(((int) u.u_offset & 0777) == 0) { if(bp != NULL) brelse(bp); bp = bread(dp->i_dev, bmap(dp, (int) (u.u_offset >> 9))); } /* * Note first empty directory slot * in eo for possible creat. * String compare the directory entry * and the current component. * If they do not match, go back to eloop. */ memcpy(&u.u_dent, bp->b_addr + ((int) u.u_offset & 0777), DIRSIZ+2); u.u_offset += DIRSIZ+2; u.u_count--; if(u.u_dent.u_ino == 0) { if(eo == 0) eo = u.u_offset; goto eloop; } for(cp = &u.u_dbuf[0]; cp < &u.u_dbuf[DIRSIZ]; cp++) if(*cp != cp[u.u_dent.u_name - u.u_dbuf]) goto eloop; /* * Here a component matched in a directory. * If there is more pathname, go back to * cloop, otherwise return. */ if(bp != NULL) brelse(bp); if(flag==2 && c=='\0') { if(access(dp, IWRITE)) goto out; return(dp); } iput(dp); dp = iget(dp->i_dev, u.u_dent.u_ino); if(dp == NULL) return(NULL); goto cloop; out: iput(dp); return(NULL); } /* * Return the next character from the * kernel string pointed at by dirp. */ |
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#include "param.h" #include "inode.h" #include "user.h" #include "systm.h" #include "buf.h" #include "conf.h" /* * Convert a pathname into a pointer to * an inode. Note that the inode is locked. * * func = function called to get next char of name * &uchar if name is in user space * &schar if name is in system space * flag = SEARCH, CREAT, etc. */ struct inode * namei(func, flag, param) int (*func)(); int flag; int param; { register struct inode *dp; register int c, fstyp; register char *cp; int eo; struct state s; /* * If name starts with '/' start from * root; otherwise start from current dir. */ dp = u.u_cdir; if((c=(*func)()) == '/') dp = rootdir; while(c == '/') c = (*func)(); if(c == '\0' && flag != NI_SEARCH) { u.u_error = ENOENT; return NULL; } dp->i_count++; s.dp = dp; s.c = c; s.param = param; for (;;) { if((fstyp = s.dp->i_fstyp) >= nfstyp) panic("namei nfstyp"); switch((*fstypsw[fstyp].t_nami)(func, flag, &s)) { /* null return (error or no lookup) */ case 1: iput(s.dp); return NULL; /* change in file system */ case 2: if(s.c) break; /* found */ case 0: return s.dp; default: panic("namei ret"); } } } int dsearch(dp, eop, pg) struct inode *dp; int *eop; struct buf *(*pg)(); { int ino, eo; register struct buf *bp; register char *cp; /* * Set up to search a directory. */ u.u_offset = 0; u.u_count = dp->i_size >> 4; bp = NULL; eo = ino = 0; eloop: while(u.u_count>0) { /* * If offset is on a block boundary, * read the next directory block. * Release previous if it exists. */ if(((int) u.u_offset & 0777) == 0) { if(bp != NULL) brelse(bp); if(pg != NULL) bp = pg(dp, (int) (u.u_offset >> 9)); else bp = bread(dp->i_dev, bmap(dp, (int) (u.u_offset >> 9))); } /* * Note first empty directory slot * in eo for possible creat. * String compare the directory entry * and the current component. * If they do not match, go back to eloop. */ memcpy(&u.u_dent, bp->b_addr + ((int) u.u_offset & 0777), DIRSIZ+2); u.u_offset += DIRSIZ+2; u.u_count--; if(u.u_dent.u_ino == 0) { if(eo == 0) eo = u.u_offset; continue; } for(cp = &u.u_dbuf[0]; cp < &u.u_dbuf[DIRSIZ]; cp++) if(*cp != cp[u.u_dent.u_name - u.u_dbuf]) { goto eloop; } ino = u.u_dent.u_ino; break; } if(bp != NULL) brelse(bp); *eop = eo; return ino; } struct mount *findmount(); int ufs_namei(func, flag, s) int (*func)(); int flag; struct state *s; { register char c = s->c; register struct inode *ip, *dp = s->dp; register char *cp; int eo, fstyp = dp->i_fstyp; cloop: /* * Here dp contains pointer * to last component matched. * If there is another component, * dp must be a directory and * must have x permission. */ if(c == '\0') return 0; if((dp->i_mode&IFMT) != IFDIR) u.u_error = ENOTDIR; access(dp, IEXEC); if(u.u_error) return 1; /* * Gather up name into * users' dir buffer. */ cp = &u.u_dbuf[0]; while(c!='/' && c!='\0' && u.u_error==0) { ................................................................................ *cp++ = c; c = (*func)(); } while(cp < &u.u_dbuf[DIRSIZ]) *cp++ = '\0'; while(c == '/') c = (*func)(); s->c = c; if(u.u_error) return 1; /* * Special handling for ".." allowing chdir out of mounted * file system. */ if (u.u_dbuf[0]=='.' && u.u_dbuf[1]=='.' && u.u_dbuf[2]=='\0' && dp->i_number == ROOTINO) { struct mount *mp = findmount(dp->i_fstyp, dp->i_dev); if(mp) { iput(dp); s->dp = dp = mp->m_inodp; dp->i_count++; plock(dp); } } if(dsearch(dp, &eo, NULL)) { /* * Here a component matched in a directory. * If at end of path, check flag */ if(c=='\0') { u.u_pdir = NULL; /* for NI_CREAT */ switch(flag) { case NI_UNLINK: if(access(dp, IWRITE)) return 1; /* Avoid hanging on '.' */ if(dp->i_number == u.u_dent.u_ino) { ip = dp; dp->i_count++; } else ip = iget(dp->i_dev, u.u_dent.u_ino, fstyp); if(ip == NULL) return 1; if((ip->i_mode&IFMT)==IFDIR && !suser()) goto delout; /* Don't unlink a mounted file. */ if (ip->i_dev != dp->i_dev) { u.u_error = EBUSY; goto delout; } u.u_offset -= DIRSIZ+2; u.u_pdir = dp; dp->i_count++; wdir(0); ip->i_nlink--; ip->i_flag |= IUPD; delout: iput(ip); return 1; case NI_LINK: case NI_MKNOD: u.u_error = EEXIST; return 1; } } iput(dp); s->dp = dp = iget(dp->i_dev, u.u_dent.u_ino, fstyp); if(dp == NULL) return 1; if(fstyp != dp->i_fstyp) return 2; goto cloop; } /* * If at the end of the directory, * the search failed. Report what * is appropriate as per flag. */ if(c=='\0') { if(access(dp, IWRITE)) return 1; u.u_pdir = dp; if(eo) u.u_offset = eo-DIRSIZ-2; else dp->i_flag |= IUPD; switch(flag) { case NI_MKNOD: case NI_CREAT: s->dp = maknode(s->param); /* iputs old dp */ return 0; case NI_LINK: /* check link is one same disk */ ip = (struct inode*)(s->param); if(dp->i_dev != ip->i_dev) { u.u_error = EXDEV; return 1; } /* update link directory & update target inode */ dp->i_count++; wdir(ip->i_number); ip->i_nlink++; ip->i_flag |= IUPD; return 1; } } u.u_error = ENOENT; return 1; } /* * Return the next character from the * kernel string pointed at by dirp. */ |
Added v6/pair.c.
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#include "param.h" #include "systm.h" #include "user.h" #include "inode.h" #include "file.h" #include "buf.h" #include "reg.h" /* * Max allowable buffering per pipe. * This is also the max size of the * file created to implement the pipe. * If this size is bigger than 4096, * pipes will be implemented in LARG * files, which is probably not good. */ #define PIPSIZ 4096 #define PIPEFS 1 /* * The sys-pipe entry. * Allocate an inode on the root device. * Allocate 2 file structures. * Put it all together with flags. */ static int ino = 64; void pair() { register struct inode *ip, *pp; register struct file *rf, *wf; int r; pp = iget(0, ino++, PIPEFS); if(pp == NULL) return; ip = ialloc(rootdev); if(ip == NULL) goto out1; rf = falloc(); if(rf == NULL) goto out2; r = u.u_ar0[R0]; wf = falloc(); if(wf == NULL) { rf->f_count = 0; u.u_ofile[r] = NULL; goto out2; } u.u_ar0[R1] = u.u_ar0[R0]; u.u_ar0[R0] = r; wf->f_flag = FWRITE; wf->f_inode = pp; rf->f_flag = FREAD; rf->f_inode = pp; pp->i_count = 2; pp->i_flag = 0; /* unlock */ pp->i_addr[0] = (int)ip; pp->i_addr[1] = 0; /* rd ptr */ pp->i_addr[2] = 0; /* wr ptr */ ip->i_flag = IACC|IUPD; ip->i_mode = IALLOC; return; out2: iput(ip); out1: iput(pp); } /* * Read call directed to a pipe. */ rdpair(pp) register struct inode *pp; { register struct inode *ip = (struct inode *)(pp->i_addr[0]); loop: /* Very conservative locking */ plock(pp); /* If the head (read) has caught up with * the tail (write), reset both to 0. */ if(pp->i_addr[1] == ip->i_size) { ip->i_size = 0; pp->i_addr[1] = 0; if(ip->i_mode&IWRITE) { ip->i_mode &= ~IWRITE; wakeup(ip+1); } /* If there are not both reader and * writer active, return without * satisfying read. */ prele(pp); if(pp->i_count < 2) return; ip->i_mode |= IREAD; sleep(ip+2, PPIPE); goto loop; } /* Read and return */ u.u_offset = pp->i_addr[1]; readi(ip); pp->i_addr[1] = u.u_offset; prele(pp); } /* * Write call directed to a pipe. */ wrpair(pp) register struct inode *pp; { register struct inode *ip = (struct inode *)(pp->i_addr[0]); unsigned c; c = u.u_count; loop: /* If all done, return */ plock(pp); if(c == 0) { prele(pp); u.u_count = 0; return; } /* If there are not both read and * write sides of the pipe active, * return error and signal too. */ if(pp->i_count < 2) { prele(pp); u.u_error = EPIPE; psignal(u.u_procp, SIGPIPE); return; } /* If the pipe is full, * wait for reads to deplete * and truncate it. */ if(ip->i_size == PIPSIZ) { ip->i_mode |= IWRITE; prele(pp); sleep(ip+1, PPIPE); goto loop; } /* Write what is possible and * loop back. */ u.u_offset = ip->i_size; u.u_count = min(c, (int)(PIPSIZ - u.u_offset)); c -= u.u_count; writei(ip); prele(pp); if(ip->i_mode&IREAD) { ip->i_mode &= ~IREAD; wakeup(ip+2); } goto loop; } struct inode * getpair(fstyp, dev, ino, ip) int fstyp, dev, ino; register struct inode *ip; { ip->i_mode = 0; ip->i_nlink = 0; ip->i_uid = 1; ip->i_gid = 1; ip->i_size = 0; return(ip); } frepair(pp) struct inode *pp; { register int n = pp->i_addr[0]; if( n ) iput((struct inode*)n); } /* ======= */ struct direct { int d_ino; char d_name[14]; } names[2] = { {1, "." }, {1, ".." } }; struct inode *ino1; struct inode * sfsget(fstyp, dev, ino, ip) int fstyp, dev, ino; register struct inode *ip; { printf("get %d,%d\n", ip, ino); if(ino==1) { ip->i_mode = IFDIR | 0555; /* dir, read and search */ ip->i_nlink = 2; /* complete fake */ ip->i_uid = ip->i_gid = 0; ip->i_size = sizeof(names); ino1 = ip; return(ip); } ip->i_mode = 0400; ip->i_nlink = 0; ip->i_uid = u.u_uid; ip->i_gid = u.u_gid; ip->i_size = 0; return(ip); } sfsput(ip) struct inode *ip; { register struct inode *dp; printf("put %d,%d,%d\n", ip, ip->i_number, (int)ip->i_size); if(ip->i_number != ROOTINO && ip->i_count == 1) { dp = ino1; if(dp == NULL) panic("sfsput"); dp->i_size -= 16; dp->i_count--; iput(dp); } } sfsfree(ip) struct inode *ip; { } struct buf * getpage(dp, n) struct inode *dp; int n; { register struct inode *ip; register struct buf *bp; register char *cp; register int i = 2; bp = getblk(NODEV); cp = bp->b_addr; memcpy(cp, names, 32); cp += 32; for(ip = &inode[0]; ip < &inode[NINODE]; ip++) { if(ip->i_number < 2 || ip->i_fstyp != 2) continue; printf("gp %d, %d\n", ip, ip->i_number); *((int*)cp) = ip->i_number; memcpy(cp+2, ip->i_addr, DIRSIZ); cp += 16; if(++i > 31) panic("getpage"); } return bp; } sfsrd(ip) register struct inode *ip; { register int i, n; struct buf *bp; if(ip->i_number != ROOTINO) { return; } if (u.u_offset < 0 || u.u_offset >= ip->i_size || u.u_count <= 0) return; bp = getpage(); i = u.u_offset; n = ip->i_size; n = min(u.u_count, n - i); iomove(bp->b_addr+i, n, B_READ); brelse(bp); } sfswr(ip) struct inode *ip; { printf("wr %d,%d\n", ip, u.u_count); u.u_count = 0; /* rat hole */ } struct mount *findmount(); int sfsnam(func, flag, s) int (*func)(); int flag; struct state *s; { register char *cp, c = s->c; register struct inode *dp = s->dp; int dev, fstyp, ino, eo; char *p; static int ctr = 2; cloop: if(c == '\0') return 0; if ((dp->i_mode & IFMT) != IFDIR) u.u_error = ENOTDIR; (void) access(dp, IEXEC); if (u.u_error) return 1; p = u.u_dirp; cp = &u.u_dbuf[0]; while(c!='/' && c!='\0' && u.u_error==0) { if(cp < &u.u_dbuf[DIRSIZ]) *cp++ = c; c = (*func)(); } while(cp < &u.u_dbuf[DIRSIZ]) *cp++ = '\0'; while(c=='/') c = (*func)(); s->c = c; if (u.u_dbuf[0]=='.' && u.u_dbuf[1]=='.' && u.u_dbuf[2]=='\0' && dp->i_number == ROOTINO) { struct mount *mp = findmount(dp->i_fstyp, dp->i_dev); if(mp) { iput(dp); s->dp = dp = mp->m_inodp; dp->i_count++; plock(dp); s->c = u.u_dbuf[0]; u.u_dirp = p; return 2; } } if( (ino = dsearch(dp, &eo, &getpage)) ) { dev = dp->i_dev; fstyp = dp->i_fstyp; iput(dp); s->dp = iget(dev, ino, fstyp); goto cloop; } if(c == 0 && flag == NI_CREAT) { dp->i_size += 16; dp->i_count++; iput(dp); s->dp = dp = iget(0, ctr++, 2); memcpy(dp->i_addr, u.u_dbuf, DIRSIZ); dp->i_addr[7] = 0; /*dp->i_count++; /* HACK */ return 0; } u.u_error = ENOENT; return 1; } #define PROCDEV 0 void suword(); sfsstat(ip, ub) struct inode *ip; register int *ub; { register int i; register int *tp = (int*)(&time); /* printf("stat %d,%d\n", ip, ip->i_number); */ if(ip->i_number < 64) { suword(ub++, PROCDEV); suword(ub++, ip->i_number); suword(ub++, ip->i_mode); suword(ub++, (ip->i_nlink<<8)|ip->i_uid); suword(ub++, 0); suword(ub++, (int)(ip->i_size)); for(i=0; i<8; ++i) suword(ub++, 0); suword(ub++, tp[0]); suword(ub++, tp[1]); suword(ub++, tp[0]); suword(ub++, tp[1]); } else u.u_error = ENOENT; u.u_ar0[R0] = 0; } struct inode * sfsopn(ip, rw, fp) struct inode *ip; int rw; struct file *fp; { register struct file *wf; register struct inode *ap, *pip; int i, w, r; printf("in sfs open\n"); if(ip->i_number == 1) return ip; ap = iget(0, ino++, PIPEFS); if(ap == NULL) return ip; pip = ialloc(rootdev); if(pip == NULL) goto out1; ap->i_count = 2; ap->i_addr[0] = (int)pip; ap->i_addr[1] = 0; /* rd ptr */ ap->i_flag = 0; /* unlock */ fp->f_inode = ap; fp->f_flag = FREAD; r = u.u_ar0[R0]; wf = falloc(); if(wf == NULL) goto out2; w = u.u_ar0[R0]; u.u_ofile[w] = NULL; wf->f_flag = FWRITE; wf->f_inode = ap; ip->i_addr[7] = (int)wf; /* wake up server, keep lock */ wakeup(&ip->i_addr[8], PPIPE); while(ip->i_addr[7] == (int)ap) sleep(&ip->i_addr[7], PPIPE); u.u_ar0[R0] = r; iput(ip); return ap; out2: iput(pip); out1: iput(ap); return ip; } void soaccept() { register struct file *fp, *ap; register struct inode *ip; int i; fp = getf(u.u_arg[0]); if(fp == NULL) return; ip = fp->f_inode; if(ip->i_fstyp!=2) { u.u_error = EBADF; return; } /* wait for connection */ while(ip->i_addr[7] == 0) { sleep(&ip->i_addr[8], PPIPE); } /* accept */ ap = (struct file *)(ip->i_addr[7]); ip->i_addr[7] = 0; i = ufalloc(); if( i >= 0 ) { u.u_ofile[i] = ap; } wakeup(&ip->i_addr[7], PPIPE); } #define MOUNTED 1 struct mount *allocmount(); prmount(fstyp, fdir, flag) int fstyp; char *fdir; int flag; /* 0 = mount, 1 = unmount */ { struct inode *ip; struct mount *mp; extern int schar(); if(flag) goto unmount; mp = allocmount(fstyp, PROCDEV); if(mp == NULL) { /* duplicated mount */ u.u_error = EBUSY; return; } mp->m_bufp = (struct buf *)MOUNTED; u.u_dirp = fdir; ip = namei(schar, NI_SEARCH); if(ip == NULL) { mp->m_bufp = NULL; return; } if(ip->i_count != 1 || (ip->i_mode & IFMT) != IFDIR) { mp->m_bufp = NULL; u.u_error = EBUSY; iput(ip); return; } mp->m_inodp = ip; ip->i_flag |= IMOUNT; prele(ip); return; unmount: mp = findmount(fstyp, PROCDEV); if(mp == NULL) return; ip = mp->m_inodp; ip->i_flag &= ~IMOUNT; iput(ip); mp->m_bufp = NULL; } |
Added v6/proca.c.
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 |
#include "param.h" #include "systm.h" #include "proc.h" #include "inode.h" #include "user.h" #include "buf.h" #include "reg.h" /* inumber to pid */ #define PRMAGIC 64 #define PROCDEV 0 #define MOUNTED 1 struct direct { int d_ino; char d_name[14]; }; struct proc * pfind(pid) int pid; { register struct proc *p; for (p = &proc[0]; p < &proc[NPROC]; p++) if (p->p_pid == pid) return (p); return NULL; } prput(ip) struct inode *ip; { struct proc *p; if(ip->i_number == ROOTINO) return; p = pfind(ip->i_number - PRMAGIC); if(p == 0) { printf("prput(%d)?\n", ip->i_number - PRMAGIC); return; } } struct inode * prget(fstyp, dev, ino, ip) int dev; register struct inode *ip; { register struct proc *p; if(ino == ROOTINO) { /* fake up an inode */ ip->i_mode = IFDIR | 0555; /* dir, read and search */ ip->i_nlink = 2; /* complete fake */ ip->i_uid = ip->i_gid = 0; ip->i_size = (NPROC + 2) * sizeof(struct direct); return(ip); } p = pfind(ino - PRMAGIC); if (p == 0) { iput(ip); u.u_error = ENOENT; return(0); } ip->i_mode = 0400; /* regular, r/w only by owner */ ip->i_nlink = 1; ip->i_uid = p->p_uid; ip->i_gid = 1; /* who cares */ ip->i_size = 0xe000; return(ip); } prfree(ip) struct inode *ip; {} prupdat(ip, tm) struct inode *ip; long *tm; {} #define SDSIZ sizeof(struct direct) int min(); prread(ip) struct inode *ip; { static struct direct dotbuf[] = { { ROOTINO, "."}, { ROOTINO, ".."} }; struct direct dirbuf; register int i, n, j; int minproc, maxproc, modoff; struct proc *p; if (ip->i_number == ROOTINO) { /* fake up . .. and the proc inodes */ if (u.u_offset < 0 || u.u_offset >= ip->i_size || u.u_count <= 0) return; i = u.u_offset; if (i < 2*SDSIZ) { n = min(u.u_count, 2*SDSIZ - i); iomove((char*)&dotbuf[0] + i, n, B_READ); if (u.u_count <= 0 || u.u_error) return; } minproc = (i - 2*SDSIZ)/SDSIZ; maxproc = (i + u.u_count - 1)/SDSIZ; modoff = i % SDSIZ; for (j = 0; j < DIRSIZ; j++) dirbuf.d_name[j] = 0; for (i=minproc; i<min(maxproc, NPROC); i++) { if (n = proc[i].p_pid) { dirbuf.d_ino = n + PRMAGIC; for (j = 4; j >= 0; j--) dirbuf.d_name[j] = n%10 + '0', n /= 10; } else { dirbuf.d_ino = 0; } iomove((char*)&dirbuf + modoff, min(u.u_count, SDSIZ - modoff), B_READ); if (u.u_count <= 0 || u.u_error) return; modoff = 0; } } else if (p = pfind(ip->i_number - PRMAGIC)) { ; } else { u.u_error = ENOENT; } } prwrite(ip) struct inode *ip; { register struct proc *p; if (ip->i_number == ROOTINO) { u.u_error = EISDIR; } else if (p = pfind(ip->i_number - PRMAGIC)) { printf("cannot write file\n"); } else { u.u_error = ENOENT; return; } } prtrunc(ip) struct inode *ip; {} void suword(); prstat(ip, ub) struct inode *ip; register int *ub; { struct proc *p = NULL; register int i; register int *tp = (int*)(&time); if(ip->i_number == ROOTINO || (p = pfind(ip->i_number - PRMAGIC))) { suword(ub++, PROCDEV); suword(ub++, ip->i_number); suword(ub++, ip->i_mode); suword(ub++, (ip->i_nlink<<8)|ip->i_uid); suword(ub++, 0); suword(ub++, (int)(ip->i_size)); for(i=0; i<8; ++i) suword(ub++, 0); suword(ub++, tp[0]); suword(ub++, tp[1]); suword(ub++, tp[0]); suword(ub++, tp[1]); } else u.u_error = ENOENT; u.u_ar0[R0] = 0; } struct mount *findmount(); int prnami(func, flag, s) int (*func)(); int flag; struct state *s; { register char *cp, c = s->c; register struct inode *dp = s->dp; register int n = 0; int dev, fstyp; register struct mount *mp; if ((dp->i_mode & IFMT) != IFDIR) u.u_error = ENOTDIR; (void) access(dp, IEXEC); if (flag!=NI_SEARCH) u.u_error = EPERM; if (u.u_error) return 1; cp = &u.u_dbuf[0]; while(c!='/' && c!='\0' && u.u_error==0) { if(cp < &u.u_dbuf[DIRSIZ]) *cp++ = c; c = (*func)(); } *cp++ = '\0'; while(c=='/') c = (*func)(); s->c = c; cp = &u.u_dbuf[0]; if (cp[0] == '.') { if (cp[1] == 0) return 2; if (cp[1] != '.' || cp[2]) return (u.u_error = ENOENT), 1; mp = findmount(dp->i_fstyp, dp->i_dev); if (mp == NULL) panic("prnami"); iput(dp); s->dp = dp = mp->m_inodp; dp->i_count++; plock(dp); return 2; } while ((c = *cp++)) { if(c < '0' || c > '9') return (u.u_error = ENOENT), 1; n = 10 * n + c - '0'; } dev = dp->i_dev; fstyp = dp->i_fstyp; iput(dp); s->dp = iget(dev, n + PRMAGIC, fstyp); return 0; } struct mount *allocmount(); prmount(fstyp, fdir, flag) int fstyp; char *fdir; int flag; /* 0 = mount, 1 = unmount */ { struct inode *ip; struct mount *mp; extern int schar(); if(flag) goto unmount; mp = allocmount(fstyp, PROCDEV); if(mp == NULL) { /* duplicated mount */ u.u_error = EBUSY; return; } mp->m_bufp = (struct buf *)MOUNTED; u.u_dirp = fdir; ip = namei(schar, NI_SEARCH); if(ip == NULL) { mp->m_bufp = NULL; return; } if(ip->i_count != 1 || (ip->i_mode & IFMT) != IFDIR) { mp->m_bufp = NULL; u.u_error = EBUSY; iput(ip); return; } mp->m_inodp = ip; ip->i_flag |= IMOUNT; prele(ip); return; unmount: mp = findmount(fstyp, PROCDEV); if(mp == NULL) return; ip = mp->m_inodp; ip->i_flag &= ~IMOUNT; iput(ip); mp->m_bufp = NULL; } prioctl(ip, cmd, cmaddr) struct inode *ip; char* cmaddr; {} |
Changes to v6/rdwri.c.
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
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..
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83
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|
* u_segflg read to kernel/user
*/
void
readi(aip)
struct inode *aip;
{
struct buf *bp;
int lbn, bn, on;
register int dn, n;
register struct inode *ip;
ip = aip;
if(u.u_count == 0)
return;
ip->i_flag |= IACC;
if((ip->i_mode&IFMT) == IFCHR) {
(*cdevsw[ip->i_addr[0].d_major].d_read)(ip->i_addr[0]);
return;
}
do {
lbn = bn = u.u_offset >> 9;
................................................................................
* u_segflg write to kernel/user
*/
void
writei(aip)
struct inode *aip;
{
struct buf *bp;
int n, on;
register int dn, bn;
register struct inode *ip;
ip = aip;
ip->i_flag |= IACC|IUPD;
if((ip->i_mode&IFMT) == IFCHR) {
(*cdevsw[ip->i_addr[0].d_major].d_write)(ip->i_addr[0]);
return;
}
if (u.u_count == 0)
return;
|
<
|
>
>
>
>
>
<
>
>
>
>
>
|
17
18
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..
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|
* u_segflg read to kernel/user
*/
void
readi(aip)
struct inode *aip;
{
struct buf *bp;
register int dn, n, fstyp;
register struct inode *ip;
register int lbn, bn, on;
ip = aip;
if(u.u_count == 0)
return;
ip->i_flag |= IACC;
if((fstyp = ip->i_fstyp)) {
(*fstypsw[fstyp].t_read)(ip);
return;
}
if((ip->i_mode&IFMT) == IFCHR) {
(*cdevsw[ip->i_addr[0].d_major].d_read)(ip->i_addr[0]);
return;
}
do {
lbn = bn = u.u_offset >> 9;
................................................................................
* u_segflg write to kernel/user
*/
void
writei(aip)
struct inode *aip;
{
struct buf *bp;
register int dn, bn;
register struct inode *ip;
register int n, on, fstyp;
ip = aip;
ip->i_flag |= IACC|IUPD;
if((fstyp = ip->i_fstyp)) {
(*fstypsw[fstyp].t_write)(ip);
return;
}
if((ip->i_mode&IFMT) == IFCHR) {
(*cdevsw[ip->i_addr[0].d_major].d_write)(ip->i_addr[0]);
return;
}
if (u.u_count == 0)
return;
|
Changes to v6/sig.c.
197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 |
core()
{
register s, *ip;
extern int schar();
u.u_error = 0;
u.u_dirp = "core";
ip = namei(&schar, 1);
if(ip == NULL) {
if(u.u_error)
return(0);
ip = maknode(0666);
if(ip == NULL)
return(0);
}
if(!access(ip, IWRITE) &&
(ip->i_mode&IFMT) == 0 &&
u.u_uid == u.u_ruid) {
itrunc(ip);
u.u_offset = 0;
u.u_base = &u;
u.u_count = USIZE;
|
| < | | < < < < |
197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 |
core()
{
register s, *ip;
extern int schar();
u.u_error = 0;
u.u_dirp = "core";
ip = namei(&schar, NI_CREAT, 0666);
if(u.u_error || ip==NULL)
return(0);
if(!access(ip, IWRITE) &&
(ip->i_mode&IFMT) == 0 &&
u.u_uid == u.u_ruid) {
itrunc(ip);
u.u_offset = 0;
u.u_base = &u;
u.u_count = USIZE;
|
Changes to v6/subr.c.
117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 |
/*
* Routine which sets a user error; placed in
* illegal entries in the bdevsw and cdevsw tables.
*/
nodev()
{
u.u_error = ENODEV;
}
/*
* Null routine; placed in insignificant entries
* in the bdevsw and cdevsw tables.
*/
nulldev()
{
}
void *
memcpy (pto, pfrom, nbytes)
void *pto, *pfrom;
unsigned int nbytes;
{
register char *to, *from;
|
< > > > > > > > |
117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 |
/*
* Routine which sets a user error; placed in
* illegal entries in the bdevsw and cdevsw tables.
*/
nodev()
{
u.u_error = ENODEV;
}
/*
* Null routine; placed in insignificant entries
* in the bdevsw and cdevsw tables.
*/
nulldev()
{
}
nullopn(ip, rw)
struct inode *ip;
int rw;
{
return ip;
}
void *
memcpy (pto, pfrom, nbytes)
void *pto, *pfrom;
unsigned int nbytes;
{
register char *to, *from;
|
Changes to v6/sys1.c.
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 |
extern int uchar();
/*
* pick up file names
* and check various modes
* for execute permission
*/
ip = namei(&uchar, 0);
if(ip == NULL)
return;
while(execnt >= NEXEC)
sleep(&execnt, EXPRI);
execnt++;
bp = getblk(NODEV);
if(access(ip, IEXEC) || (ip->i_mode&IFMT)!=0)
|
| |
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 |
extern int uchar();
/*
* pick up file names
* and check various modes
* for execute permission
*/
ip = namei(&uchar, NI_SEARCH);
if(ip == NULL)
return;
while(execnt >= NEXEC)
sleep(&execnt, EXPRI);
execnt++;
bp = getblk(NODEV);
if(access(ip, IEXEC) || (ip->i_mode&IFMT)!=0)
|
Changes to v6/sys2.c.
2 3 4 5 6 7 8 9 10 11 12 13 14 15 .. 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 ... 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 ... 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 ... 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 ... 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 |
#include "param.h"
#include "systm.h"
#include "user.h"
#include "reg.h"
#include "file.h"
#include "inode.h"
#include "proc.h"
/*
* read system call
*/
void
read()
{
................................................................................
if ((fp = falloc()) == NULL)
return;
fp->f_flag = (FNET|FREAD|FWRITE);
fp->f_offset = (unsigned long)ucbp;
fp->f_inode = NULL;
return;
}
ip = namei(&uchar, 0);
if(ip == NULL)
return;
u.u_arg[1]++;
open1(ip, u.u_arg[1], 0);
}
/*
................................................................................
*/
void
creat()
{
register struct inode *ip;
extern int uchar();
ip = namei(&uchar, 1);
if(ip == NULL) {
if(u.u_error)
return;
ip = maknode(u.u_arg[1]&07777&(~ISVTX));
if (ip==NULL)
return;
open1(ip, FWRITE, 2);
} else
open1(ip, FWRITE, 1);
}
/*
* common code for open and creat.
* Check permissions, allocate an open file structure,
* and call the device open routine if any.
................................................................................
u.u_error = EISDIR;
}
}
if(u.u_error)
goto out;
if(trf)
itrunc(ip);
prele(ip);
if ((fp = falloc()) == NULL)
goto out;
fp->f_flag = mode&(FREAD|FWRITE);
fp->f_inode = ip;
i = u.u_ar0[R0];
openi(ip, mode&FWRITE);
if(u.u_error == 0)
return;
u.u_ofile[i] = NULL;
fp->f_count--;
out:
iput(ip);
}
/*
* close system call
*/
................................................................................
* link system call
*/
void
link()
{
register struct inode *ip, *xp;
extern int uchar();
ip = namei(&uchar, 0);
if(ip == NULL)
return;
if(ip->i_nlink >= 127) {
u.u_error = EMLINK;
goto out;
}
if((ip->i_mode&IFMT)==IFDIR && !suser())
goto out;
/* unlock to avoid possibly hanging the namei */
ip->i_flag &= ~ILOCK;
u.u_dirp = (char*) u.u_arg[1];
xp = namei(&uchar, 1);
if(xp != NULL) {
u.u_error = EEXIST;
iput(xp);
}
if(u.u_error)
goto out;
/* check link is one same disk */
if(u.u_pdir->i_dev != ip->i_dev) {
iput(u.u_pdir);
u.u_error = EXDEV;
goto out;
}
/* update link directory & update target inode */
wdir(ip);
ip->i_nlink++;
ip->i_flag |= IUPD;
out:
iput(ip);
u.u_ar0[R0] = 0;
}
/*
* mknod system call
................................................................................
void
mknod()
{
register struct inode *ip;
extern int uchar();
if(suser()) {
ip = namei(&uchar, 1);
if(ip != NULL) {
u.u_error = EEXIST;
goto out;
}
}
if(u.u_error)
return;
ip = maknode(u.u_arg[1]);
if (ip==NULL)
return;
ip->i_addr[0] = u.u_arg[2];
out:
iput(ip);
}
/*
* sleep system call
* not to be confused with the sleep internal routine.
|
> | | < | | < < < > | < > > > | < < | < | < < < < < < < < < < < < < < < < < < < | < | < < < < < |
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 .. 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 ... 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 ... 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 ... 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 ... 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 |
#include "param.h" #include "systm.h" #include "user.h" #include "reg.h" #include "file.h" #include "inode.h" #include "proc.h" #include "conf.h" /* * read system call */ void read() { ................................................................................ if ((fp = falloc()) == NULL) return; fp->f_flag = (FNET|FREAD|FWRITE); fp->f_offset = (unsigned long)ucbp; fp->f_inode = NULL; return; } ip = namei(&uchar, NI_SEARCH); if(ip == NULL) return; u.u_arg[1]++; open1(ip, u.u_arg[1], 0); } /* ................................................................................ */ void creat() { register struct inode *ip; extern int uchar(); ip = namei(&uchar, NI_CREAT, u.u_arg[1]&07777&(~ISVTX)); if(u.u_error || ip==NULL) return; if(u.u_pdir) open1(ip, FWRITE, 2); else open1(ip, FWRITE, 1); } /* * common code for open and creat. * Check permissions, allocate an open file structure, * and call the device open routine if any. ................................................................................ u.u_error = EISDIR; } } if(u.u_error) goto out; if(trf) itrunc(ip); if ((fp = falloc()) == NULL) goto out; fp->f_flag = mode&(FREAD|FWRITE); fp->f_inode = ip; i = u.u_ar0[R0]; if(trf == 0) ip = (*fstypsw[ip->i_fstyp].t_open)(ip, mode&FWRITE, fp); prele(ip); /* openi(ip, mode&FWRITE); */ if(u.u_error == 0) return; u.u_ofile[i] = NULL; fp->f_count--; out: iput(ip); } /* * close system call */ ................................................................................ * link system call */ void link() { register struct inode *ip, *xp; extern int uchar(); ip = namei(&uchar, NI_SEARCH); if(ip == NULL) return; if(ip->i_nlink >= 127) { u.u_error = EMLINK; goto out; } if((ip->i_mode&IFMT)==IFDIR && !suser()) goto out; /* unlock to avoid possibly hanging the namei */ ip->i_flag &= ~ILOCK; u.u_dirp = (char*) u.u_arg[1]; (void)namei(&uchar, NI_LINK, ip); out: iput(ip); u.u_ar0[R0] = 0; } /* * mknod system call ................................................................................ void mknod() { register struct inode *ip; extern int uchar(); if(suser()) { ip = namei(&uchar, NI_MKNOD, u.u_arg[1]); if(u.u_error || ip==NULL) goto out; } if(u.u_error) return; ip->i_addr[0] = u.u_arg[2]; out: iput(ip); } /* * sleep system call * not to be confused with the sleep internal routine. |
Changes to v6/sys3.c.
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 ... 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 ... 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 ... 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 |
*/
void
stat()
{
register struct inode *ip;
extern int uchar();
ip = namei(&uchar, 0);
if(ip == NULL)
return;
stat1(ip, u.u_arg[1]);
iput(ip);
}
/*
* The basic routine for fstat and stat:
* get the inode and pass appropriate parts back.
*/
void
stat1(ip, ub)
struct inode *ip;
int *ub;
{
register int i, *cp;
register struct buf *bp;
iupdat(ip, &time);
bp = bread(ip->i_dev, (ip->i_number + 31) >> 4);
cp = &(ip->i_dev);
for(i=0; i<14; i++) {
if(i==4) cp++; /* FIXME skip gid & filler for now */
suword(ub++, *cp++);
}
cp = (int*) (bp->b_addr + 32 * ((ip->i_number + 31) & 017) + 24);
................................................................................
closef(fp);
if ( (fp = getf(i)) == NULL || (unsigned) j >= NOFILE)
return;
u.u_ar0[R0] = j;
u.u_ofile[j] = fp;
fp->f_count++;
}
/*
* the mount system call.
*/
void
smount()
{
int d;
register struct inode *ip;
register struct mount *mp, *smp;
extern int uchar();
d = getmdev();
if(u.u_error)
return;
u.u_dirp = (char*) u.u_arg[1];
ip = namei(&uchar, 0);
if(ip == NULL)
return;
if(ip->i_count!=1 || (ip->i_mode&(IFBLK&IFCHR))!=0)
goto out;
smp = NULL;
for(mp = &mount[0]; mp < &mount[NMOUNT]; mp++) {
if(mp->m_bufp != NULL) {
if(d == mp->m_dev)
goto out;
} else
if(smp == NULL)
smp = mp;
}
if(smp == NULL)
goto out;
(*bdevsw[d.d_major].d_open)(d, !u.u_arg[2]);
if(u.u_error)
goto out;
mp = (struct mount*) bread(d, 1);
if(u.u_error) {
brelse((struct buf*)mp);
goto out1;
}
smp->m_inodp = ip;
smp->m_dev = d;
smp->m_bufp = getblk(NODEV);
memcpy(smp->m_bufp->b_addr, ((struct buf*)mp)->b_addr, 512);
smp = (struct mount*)smp->m_bufp->b_addr;
((struct filsys*)smp)->s_ilock = 0;
((struct filsys*)smp)->s_flock = 0;
((struct filsys*)smp)->s_ronly = u.u_arg[2] & 1;
brelse((struct buf*)mp);
ip->i_flag |= IMOUNT;
prele(ip);
return;
out:
u.u_error = EBUSY;
out1:
iput(ip);
}
/*
* the umount system call.
*/
void
sumount()
{
................................................................................
register struct inode *ip;
register struct mount *mp;
update();
d = getmdev();
if(u.u_error)
return;
for(mp = &mount[0]; mp < &mount[NMOUNT]; mp++)
if(mp->m_bufp!=NULL && d==mp->m_dev)
goto found;
u.u_error = EINVAL;
return;
found:
for(ip = &inode[0]; ip < &inode[NINODE]; ip++)
if(ip->i_number!=0 && d==ip->i_dev) {
u.u_error = EBUSY;
return;
}
(*bdevsw[d.d_major].d_close)(d, 0);
ip = mp->m_inodp;
................................................................................
*/
getmdev()
{
register int d;
register struct inode *ip;
extern int uchar();
ip = namei(&uchar, 0);
if(ip == NULL)
return;
if((ip->i_mode&IFMT) != IFBLK)
u.u_error = ENOTBLK;
d = ip->i_addr[0];
if(ip->i_addr[0].d_major >= nblkdev)
u.u_error = ENXIO;
iput(ip);
return(d);
}
|
| | | | > > > > > > > > > > > > > > > > > > > > > > > > > > > | | > > | < < < < < < < | < | | < | | | | | | > > > > > > > > > > > > > > | < < | | | < | |
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 ... 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 ... 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 ... 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 |
*/
void
stat()
{
register struct inode *ip;
extern int uchar();
ip = namei(&uchar, NI_SEARCH);
if(ip == NULL)
return;
stat1(ip, u.u_arg[1]);
iput(ip);
}
/*
* The basic routine for fstat and stat:
* get the inode and pass appropriate parts back.
*/
void
stat1(ip, ub)
register struct inode *ip;
register int *ub;
{
register int i, *cp, fstyp;
register struct buf *bp;
iupdat(ip, &time);
if((fstyp = ip->i_fstyp)) {
(*fstypsw[fstyp].t_stat)(ip, ub);
return;
}
bp = bread(ip->i_dev, (ip->i_number + 31) >> 4);
cp = &(ip->i_dev);
for(i=0; i<14; i++) {
if(i==4) cp++; /* FIXME skip gid & filler for now */
suword(ub++, *cp++);
}
cp = (int*) (bp->b_addr + 32 * ((ip->i_number + 31) & 017) + 24);
................................................................................
closef(fp);
if ( (fp = getf(i)) == NULL || (unsigned) j >= NOFILE)
return;
u.u_ar0[R0] = j;
u.u_ofile[j] = fp;
fp->f_count++;
}
/* get a free mount slot */
struct mount *
allocmount(fstyp, dev)
int fstyp;
int dev;
{
register struct mount *mp, *smp;
smp = NULL;
for(mp = &mount[1]; mp < &mount[NMOUNT]; mp++) {
if(mp->m_bufp == NULL) {
if(smp == NULL)
smp = mp;
} else if(mp->m_dev == dev && mp->m_fstyp == fstyp)
return NULL; /* mounted twice */
}
if (smp != NULL) {
smp->m_dev = dev;
smp->m_fstyp = fstyp;
}
return smp;
}
/*
* the mount system call.
*/
void
smount()
{
int d;
register struct inode *ip;
register struct mount *smp;
register struct filsys *fs;
struct buf *bp;
extern int uchar();
d = getmdev();
if(u.u_error)
return;
u.u_dirp = (char*) u.u_arg[1];
ip = namei(&uchar, NI_SEARCH);
if(ip == NULL)
return;
if(ip->i_count!=1 || (ip->i_mode&(IFBLK&IFCHR))!=0)
goto out;
smp = allocmount(0, d);
if(smp == NULL)
goto out;
(*bdevsw[d.d_major].d_open)(d, !u.u_arg[2]);
if(u.u_error)
goto out;
bp = bread(d, 1);
if(u.u_error) {
brelse(bp);
goto out1;
}
smp->m_inodp = ip;
smp->m_bufp = getblk(NODEV);
memcpy(smp->m_bufp->b_addr, bp->b_addr, 512);
fs = (struct filsys*)smp->m_bufp->b_addr;
fs->s_ilock = 0;
fs->s_flock = 0;
fs->s_ronly = u.u_arg[2] & 1;
brelse(bp);
ip->i_flag |= IMOUNT;
prele(ip);
return;
out:
u.u_error = EBUSY;
out1:
iput(ip);
}
/* find the mount slot assigned a particular device */
struct mount *
findmount(fstyp, dev)
int fstyp;
int dev;
{
register struct mount *mp;
for(mp = &mount[1]; mp < &mount[NMOUNT]; mp++)
if(mp->m_bufp!=NULL && dev==mp->m_dev && fstyp==mp->m_fstyp)
return mp;
return NULL;
}
/*
* the umount system call.
*/
void
sumount()
{
................................................................................
register struct inode *ip;
register struct mount *mp;
update();
d = getmdev();
if(u.u_error)
return;
if((mp = findmount(0, d))==NULL) {
u.u_error = EINVAL;
return;
}
for(ip = &inode[0]; ip < &inode[NINODE]; ip++)
if(ip->i_number!=0 && d==ip->i_dev) {
u.u_error = EBUSY;
return;
}
(*bdevsw[d.d_major].d_close)(d, 0);
ip = mp->m_inodp;
................................................................................
*/
getmdev()
{
register int d;
register struct inode *ip;
extern int uchar();
ip = namei(&uchar, NI_SEARCH);
if(ip == NULL)
return;
if((ip->i_mode&IFMT) != IFBLK)
u.u_error = ENOTBLK;
d = ip->i_addr[0];
if(ip->i_addr[0].d_major >= nblkdev)
u.u_error = ENXIO;
iput(ip);
return(d);
}
|
Changes to v6/sys4.c.
98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 |
n = 0;
u.u_procp->p_nice = n;
}
void
unlink()
{
register struct inode *ip, *pp;
extern int uchar();
pp = namei(&uchar, 2);
if(pp == NULL)
return;
prele(pp);
ip = iget(pp->i_dev, u.u_dent.u_ino);
if(ip == NULL)
panic("unlink -- iget");
if((ip->i_mode&IFMT)==IFDIR && !suser())
goto out;
u.u_offset -= DIRSIZ+2;
u.u_base = (char*) &u.u_dent;
u.u_count = DIRSIZ+2;
u.u_dent.u_ino = 0;
u.u_segflg++;
writei(pp);
u.u_segflg--;
ip->i_nlink--;
ip->i_flag |= IUPD;
iput(ip);
out:
iput(pp);
u.u_ar0[R0] = 0;
}
void
chdir()
{
register struct inode *ip;
extern int uchar();
ip = namei(&uchar, 0);
if(ip == NULL)
return;
if((ip->i_mode&IFMT) != IFDIR) {
u.u_error = ENOTDIR;
bad:
iput(ip);
return;
|
< | < < < < < < < < < < < < < < < < < < < < | |
98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 |
n = 0;
u.u_procp->p_nice = n;
}
void
unlink()
{
extern int uchar();
(void)namei(&uchar, NI_UNLINK);
u.u_ar0[R0] = 0;
}
void
chdir()
{
register struct inode *ip;
extern int uchar();
ip = namei(&uchar, NI_SEARCH);
if(ip == NULL)
return;
if((ip->i_mode&IFMT) != IFDIR) {
u.u_error = ENOTDIR;
bad:
iput(ip);
return;
|
Changes to v6/sysent.c.
56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 |
1, ×, /* 43 = times */ 4, &profil, /* 44 = prof */ 3, &sysnet, /* 45 = sysnet, was: tiu */ 1, &setgid, /* 46 = setgid */ 0, &getgid, /* 47 = getgid */ 2, &ssig, /* 48 = sig */ 3, &ioctl, /* 49 = ioctl */ 0, &nosys, /* 50 = x */ 0, &nosys, /* 51 = x */ 0, &nosys, /* 52 = x */ 0, &nosys, /* 53 = x */ 0, &nosys, /* 54 = x */ 0, &nosys, /* 55 = x */ 0, &nosys, /* 56 = x */ 0, &nosys, /* 57 = x */ 0, &nosys, /* 58 = x */ 0, &nosys, /* 59 = x */ 0, &nosys, /* 60 = x */ 0, &nosys, /* 61 = x */ 0, &nosys, /* 62 = x */ 0, &nosys /* 63 = x */ }; |
| | |
56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 |
1, ×, /* 43 = times */ 4, &profil, /* 44 = prof */ 3, &sysnet, /* 45 = sysnet, was: tiu */ 1, &setgid, /* 46 = setgid */ 0, &getgid, /* 47 = getgid */ 2, &ssig, /* 48 = sig */ 3, &ioctl, /* 49 = ioctl */ 0, &pair, /* 50 = x */ 1, &soaccept, /* 51 = x */ 0, &nosys, /* 52 = x */ 0, &nosys, /* 53 = x */ 0, &nosys, /* 54 = x */ 0, &nosys, /* 55 = x */ 0, &nosys, /* 56 = x */ 0, &nosys, /* 57 = x */ 0, &nosys, /* 58 = x */ 0, &nosys, /* 59 = x */ 0, &nosys, /* 60 = x */ 0, &nosys, /* 61 = x */ 0, &nosys, /* 62 = x */ 0, &nosys /* 63 = x */ }; |
Changes to v6/systm.h.
16
17
18
19
20
21
22
23
24
25
26
27
28
29
..
94
95
96
97
98
99
100
101
|
* Used to find the super block.
*/
struct mount
{
int m_dev; /* device mounted */
struct buf *m_bufp; /* pointer to superblock */
struct inode *m_inodp; /* pointer to mounted on inode */
} mount[NMOUNT];
int mpid; /* generic for unique process id's */
char runin; /* scheduling flag: a process needs swapping in */
char runout; /* scheduling flag: a process needs swapping out */
char runrun; /* scheduling flag: schedule a higher prio process */
char curpri; /* more scheduling */
................................................................................
void profil();
void nosys();
void setgid();
void getgid();
void ssig();
void sysnet();
void ioctl();
#endif
|
>
>
>
|
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
..
95
96
97
98
99
100
101
102
103
104
|
* Used to find the super block.
*/
struct mount
{
int m_dev; /* device mounted */
struct buf *m_bufp; /* pointer to superblock */
struct inode *m_inodp; /* pointer to mounted on inode */
int m_fstyp; /* filesystem type */
} mount[NMOUNT];
int mpid; /* generic for unique process id's */
char runin; /* scheduling flag: a process needs swapping in */
char runout; /* scheduling flag: a process needs swapping out */
char runrun; /* scheduling flag: schedule a higher prio process */
char curpri; /* more scheduling */
................................................................................
void profil();
void nosys();
void setgid();
void getgid();
void ssig();
void sysnet();
void ioctl();
void pair();
void soaccept();
#endif
|
Changes to v6/tty.c.
386 387 388 389 390 391 392 393 394 395 396 397 398 399 |
n = u.u_count;
u.u_offset += n;
while (n--) {
spl7();
while (tp->t_outq.c_cc > TTHIWAT) {
(*tp->t_start)(tp);
sleep(&tp->t_outq, TTOPRI);
}
spl0();
ttyoutput(u.u_segflg ? *base++ : fubyte(base++), tp);
}
u.u_count = 0;
u.u_base = (char*) base;
(*tp->t_start)(tp);
|
> |
386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 |
n = u.u_count;
u.u_offset += n;
while (n--) {
spl7();
while (tp->t_outq.c_cc > TTHIWAT) {
(*tp->t_start)(tp);
sleep(&tp->t_outq, TTOPRI);
spl7();
}
spl0();
ttyoutput(u.u_segflg ? *base++ : fubyte(base++), tp);
}
u.u_count = 0;
u.u_base = (char*) base;
(*tp->t_start)(tp);
|
Changes to v6/tty.h.
41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 |
int t_dev; /* device name */
};
#define TTIPRI 10
#define TTOPRI 20
#define CERASE 010 /* ^H */
#define CBACKSP 030 /* <= */
#define CEOT 004 /* ^D */
#define CKILL 025 /* ^U */
#define CQUIT 034 /* ^\ */
#define CINTR 003 /* ^C */
/* limits */
#define TTHIWAT 50
|
| |
41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 |
int t_dev; /* device name */
};
#define TTIPRI 10
#define TTOPRI 20
#define CERASE 010 /* ^H */
#define CBACKSP 127 /* <= */
#define CEOT 004 /* ^D */
#define CKILL 025 /* ^U */
#define CQUIT 034 /* ^\ */
#define CINTR 003 /* ^C */
/* limits */
#define TTHIWAT 50
|