Commit | Line | Data |
---|---|---|
79072805 | 1 | /* $RCSfile: doio.c,v $$Revision: 4.1 $$Date: 92/08/07 17:19:42 $ |
a687059c | 2 | * |
6e21c824 | 3 | * Copyright (c) 1991, Larry Wall |
a687059c | 4 | * |
6e21c824 LW |
5 | * You may distribute under the terms of either the GNU General Public |
6 | * License or the Artistic License, as specified in the README file. | |
a687059c LW |
7 | * |
8 | * $Log: doio.c,v $ | |
79072805 LW |
9 | * Revision 4.1 92/08/07 17:19:42 lwall |
10 | * Stage 6 Snapshot | |
11 | * | |
faf8582f LW |
12 | * Revision 4.0.1.6 92/06/11 21:08:16 lwall |
13 | * patch34: some systems don't declare h_errno extern in header files | |
14 | * | |
bee1dbe2 LW |
15 | * Revision 4.0.1.5 92/06/08 13:00:21 lwall |
16 | * patch20: some machines don't define ENOTSOCK in errno.h | |
17 | * patch20: new warnings for failed use of stat operators on filenames with \n | |
18 | * patch20: wait failed when STDOUT or STDERR reopened to a pipe | |
19 | * patch20: end of file latch not reset on reopen of STDIN | |
20 | * patch20: seek(HANDLE, 0, 1) went to eof because of ancient Ultrix workaround | |
21 | * patch20: fixed memory leak on system() for vfork() machines | |
22 | * patch20: get*by* routines now return something useful in a scalar context | |
23 | * patch20: h_errno now accessible via $? | |
24 | * | |
99b89507 LW |
25 | * Revision 4.0.1.4 91/11/05 16:51:43 lwall |
26 | * patch11: prepared for ctype implementations that don't define isascii() | |
27 | * patch11: perl mistook some streams for sockets because they return mode 0 too | |
28 | * patch11: reopening STDIN, STDOUT and STDERR failed on some machines | |
29 | * patch11: certain perl errors should set EBADF so that $! looks better | |
30 | * patch11: truncate on a closed filehandle could dump | |
31 | * patch11: stats of _ forgot whether prior stat was actually lstat | |
32 | * patch11: -T returned true on NFS directory | |
33 | * | |
1462b684 LW |
34 | * Revision 4.0.1.3 91/06/10 01:21:19 lwall |
35 | * patch10: read didn't work from character special files open for writing | |
36 | * patch10: close-on-exec wrongly set on system file descriptors | |
37 | * | |
6e21c824 LW |
38 | * Revision 4.0.1.2 91/06/07 10:53:39 lwall |
39 | * patch4: new copyright notice | |
40 | * patch4: system fd's are now treated specially | |
41 | * patch4: added $^F variable to specify maximum system fd, default 2 | |
42 | * patch4: character special files now opened with bidirectional stdio buffers | |
43 | * patch4: taintchecks could improperly modify parent in vfork() | |
44 | * patch4: many, many itty-bitty portability fixes | |
45 | * | |
1c3d792e LW |
46 | * Revision 4.0.1.1 91/04/11 17:41:06 lwall |
47 | * patch1: hopefully straightened out some of the Xenix mess | |
48 | * | |
fe14fcc3 LW |
49 | * Revision 4.0 91/03/20 01:07:06 lwall |
50 | * 4.0 baseline. | |
a687059c LW |
51 | * |
52 | */ | |
53 | ||
54 | #include "EXTERN.h" | |
55 | #include "perl.h" | |
56 | ||
fe14fcc3 | 57 | #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM) |
c2ab57d4 | 58 | #include <sys/ipc.h> |
fe14fcc3 | 59 | #ifdef HAS_MSG |
c2ab57d4 | 60 | #include <sys/msg.h> |
e5d73d77 | 61 | #endif |
fe14fcc3 | 62 | #ifdef HAS_SEM |
c2ab57d4 | 63 | #include <sys/sem.h> |
e5d73d77 | 64 | #endif |
fe14fcc3 | 65 | #ifdef HAS_SHM |
c2ab57d4 LW |
66 | #include <sys/shm.h> |
67 | #endif | |
e5d73d77 | 68 | #endif |
c2ab57d4 | 69 | |
663a0e37 LW |
70 | #ifdef I_UTIME |
71 | #include <utime.h> | |
72 | #endif | |
ff8e2863 LW |
73 | #ifdef I_FCNTL |
74 | #include <fcntl.h> | |
75 | #endif | |
fe14fcc3 LW |
76 | #ifdef I_SYS_FILE |
77 | #include <sys/file.h> | |
78 | #endif | |
a687059c LW |
79 | |
80 | bool | |
79072805 LW |
81 | do_open(gv,name,len) |
82 | GV *gv; | |
a687059c | 83 | register char *name; |
79072805 | 84 | I32 len; |
a687059c LW |
85 | { |
86 | FILE *fp; | |
79072805 | 87 | register IO *io = GvIO(gv); |
a687059c LW |
88 | char *myname = savestr(name); |
89 | int result; | |
90 | int fd; | |
91 | int writing = 0; | |
92 | char mode[3]; /* stdio file mode ("r\0" or "r+\0") */ | |
6e21c824 LW |
93 | FILE *saveifp = Nullfp; |
94 | FILE *saveofp = Nullfp; | |
95 | char savetype = ' '; | |
a687059c | 96 | |
8990e307 | 97 | SAVEFREEPV(myname); |
bee1dbe2 | 98 | mode[0] = mode[1] = mode[2] = '\0'; |
a687059c LW |
99 | name = myname; |
100 | forkprocess = 1; /* assume true if no fork */ | |
99b89507 | 101 | while (len && isSPACE(name[len-1])) |
a687059c | 102 | name[--len] = '\0'; |
79072805 LW |
103 | if (!io) |
104 | io = GvIO(gv) = newIO(); | |
8990e307 LW |
105 | else if (IoIFP(io)) { |
106 | fd = fileno(IoIFP(io)); | |
107 | if (IoTYPE(io) == '-') | |
c2ab57d4 | 108 | result = 0; |
6e21c824 | 109 | else if (fd <= maxsysfd) { |
8990e307 LW |
110 | saveifp = IoIFP(io); |
111 | saveofp = IoOFP(io); | |
112 | savetype = IoTYPE(io); | |
6e21c824 LW |
113 | result = 0; |
114 | } | |
8990e307 LW |
115 | else if (IoTYPE(io) == '|') |
116 | result = my_pclose(IoIFP(io)); | |
117 | else if (IoIFP(io) != IoOFP(io)) { | |
118 | if (IoOFP(io)) { | |
119 | result = fclose(IoOFP(io)); | |
120 | fclose(IoIFP(io)); /* clear stdio, fd already closed */ | |
c2ab57d4 LW |
121 | } |
122 | else | |
8990e307 | 123 | result = fclose(IoIFP(io)); |
a687059c | 124 | } |
a687059c | 125 | else |
8990e307 | 126 | result = fclose(IoIFP(io)); |
6e21c824 | 127 | if (result == EOF && fd > maxsysfd) |
a687059c | 128 | fprintf(stderr,"Warning: unable to close filehandle %s properly.\n", |
79072805 | 129 | GvENAME(gv)); |
8990e307 | 130 | IoOFP(io) = IoIFP(io) = Nullfp; |
a687059c LW |
131 | } |
132 | if (*name == '+' && len > 1 && name[len-1] != '|') { /* scary */ | |
133 | mode[1] = *name++; | |
134 | mode[2] = '\0'; | |
135 | --len; | |
136 | writing = 1; | |
137 | } | |
138 | else { | |
139 | mode[1] = '\0'; | |
140 | } | |
8990e307 | 141 | IoTYPE(io) = *name; |
a687059c | 142 | if (*name == '|') { |
99b89507 LW |
143 | /*SUPPRESS 530*/ |
144 | for (name++; isSPACE(*name); name++) ; | |
79072805 LW |
145 | if (strNE(name,"-")) |
146 | TAINT_ENV(); | |
147 | TAINT_PROPER("piped open"); | |
148 | fp = my_popen(name,"w"); | |
a687059c LW |
149 | writing = 1; |
150 | } | |
a687059c | 151 | else if (*name == '>') { |
79072805 | 152 | TAINT_PROPER("open"); |
bf38876a LW |
153 | name++; |
154 | if (*name == '>') { | |
8990e307 | 155 | mode[0] = IoTYPE(io) = 'a'; |
bf38876a | 156 | name++; |
a687059c | 157 | } |
bf38876a | 158 | else |
a687059c | 159 | mode[0] = 'w'; |
a687059c | 160 | writing = 1; |
bf38876a LW |
161 | if (*name == '&') { |
162 | duplicity: | |
163 | name++; | |
99b89507 | 164 | while (isSPACE(*name)) |
bf38876a | 165 | name++; |
99b89507 | 166 | if (isDIGIT(*name)) |
bf38876a LW |
167 | fd = atoi(name); |
168 | else { | |
85e6fe83 | 169 | gv = gv_fetchpv(name,FALSE,SVt_PVIO); |
79072805 | 170 | if (!gv || !GvIO(gv)) { |
6e21c824 LW |
171 | #ifdef EINVAL |
172 | errno = EINVAL; | |
173 | #endif | |
174 | goto say_false; | |
175 | } | |
8990e307 LW |
176 | if (GvIO(gv) && IoIFP(GvIO(gv))) { |
177 | fd = fileno(IoIFP(GvIO(gv))); | |
178 | if (IoTYPE(GvIO(gv)) == 's') | |
179 | IoTYPE(io) = 's'; | |
bf38876a LW |
180 | } |
181 | else | |
182 | fd = -1; | |
183 | } | |
fe14fcc3 LW |
184 | if (!(fp = fdopen(fd = dup(fd),mode))) { |
185 | close(fd); | |
186 | } | |
bf38876a LW |
187 | } |
188 | else { | |
99b89507 | 189 | while (isSPACE(*name)) |
bf38876a LW |
190 | name++; |
191 | if (strEQ(name,"-")) { | |
192 | fp = stdout; | |
8990e307 | 193 | IoTYPE(io) = '-'; |
bf38876a LW |
194 | } |
195 | else { | |
196 | fp = fopen(name,mode); | |
197 | } | |
198 | } | |
a687059c LW |
199 | } |
200 | else { | |
201 | if (*name == '<') { | |
bf38876a LW |
202 | mode[0] = 'r'; |
203 | name++; | |
99b89507 | 204 | while (isSPACE(*name)) |
bf38876a LW |
205 | name++; |
206 | if (*name == '&') | |
207 | goto duplicity; | |
a687059c LW |
208 | if (strEQ(name,"-")) { |
209 | fp = stdin; | |
8990e307 | 210 | IoTYPE(io) = '-'; |
a687059c | 211 | } |
bf38876a | 212 | else |
a687059c | 213 | fp = fopen(name,mode); |
a687059c LW |
214 | } |
215 | else if (name[len-1] == '|') { | |
a687059c | 216 | name[--len] = '\0'; |
99b89507 | 217 | while (len && isSPACE(name[len-1])) |
a687059c | 218 | name[--len] = '\0'; |
99b89507 LW |
219 | /*SUPPRESS 530*/ |
220 | for (; isSPACE(*name); name++) ; | |
79072805 LW |
221 | if (strNE(name,"-")) |
222 | TAINT_ENV(); | |
223 | TAINT_PROPER("piped open"); | |
224 | fp = my_popen(name,"r"); | |
8990e307 | 225 | IoTYPE(io) = '|'; |
a687059c LW |
226 | } |
227 | else { | |
8990e307 | 228 | IoTYPE(io) = '<'; |
99b89507 LW |
229 | /*SUPPRESS 530*/ |
230 | for (; isSPACE(*name); name++) ; | |
a687059c LW |
231 | if (strEQ(name,"-")) { |
232 | fp = stdin; | |
8990e307 | 233 | IoTYPE(io) = '-'; |
a687059c LW |
234 | } |
235 | else | |
236 | fp = fopen(name,"r"); | |
237 | } | |
238 | } | |
bee1dbe2 | 239 | if (!fp) { |
8990e307 | 240 | if (dowarn && IoTYPE(io) == '<' && strchr(name, '\n')) |
bee1dbe2 | 241 | warn(warn_nl, "open"); |
6e21c824 | 242 | goto say_false; |
bee1dbe2 | 243 | } |
8990e307 LW |
244 | if (IoTYPE(io) && |
245 | IoTYPE(io) != '|' && IoTYPE(io) != '-') { | |
a687059c LW |
246 | if (fstat(fileno(fp),&statbuf) < 0) { |
247 | (void)fclose(fp); | |
6e21c824 | 248 | goto say_false; |
a687059c | 249 | } |
1462b684 | 250 | if (S_ISSOCK(statbuf.st_mode)) |
8990e307 | 251 | IoTYPE(io) = 's'; /* in case a socket was passed in to us */ |
99b89507 LW |
252 | #ifdef HAS_SOCKET |
253 | else if ( | |
c623bd54 | 254 | #ifdef S_IFMT |
99b89507 LW |
255 | !(statbuf.st_mode & S_IFMT) |
256 | #else | |
257 | !statbuf.st_mode | |
258 | #endif | |
259 | ) { | |
79072805 | 260 | I32 buflen = sizeof tokenbuf; |
bee1dbe2 LW |
261 | if (getsockname(fileno(fp), tokenbuf, &buflen) >= 0 |
262 | || errno != ENOTSOCK) | |
8990e307 | 263 | IoTYPE(io) = 's'; /* some OS's return 0 on fstat()ed socket */ |
99b89507 LW |
264 | /* but some return 0 for streams too, sigh */ |
265 | } | |
bf38876a | 266 | #endif |
a687059c | 267 | } |
6e21c824 LW |
268 | if (saveifp) { /* must use old fp? */ |
269 | fd = fileno(saveifp); | |
270 | if (saveofp) { | |
271 | fflush(saveofp); /* emulate fclose() */ | |
272 | if (saveofp != saveifp) { /* was a socket? */ | |
273 | fclose(saveofp); | |
99b89507 LW |
274 | if (fd > 2) |
275 | Safefree(saveofp); | |
6e21c824 LW |
276 | } |
277 | } | |
278 | if (fd != fileno(fp)) { | |
bee1dbe2 | 279 | int pid; |
79072805 | 280 | SV *sv; |
bee1dbe2 | 281 | |
6e21c824 | 282 | dup2(fileno(fp), fd); |
79072805 LW |
283 | sv = *av_fetch(fdpid,fileno(fp),TRUE); |
284 | SvUPGRADE(sv, SVt_IV); | |
463ee0b2 LW |
285 | pid = SvIVX(sv); |
286 | SvIVX(sv) = 0; | |
79072805 LW |
287 | sv = *av_fetch(fdpid,fd,TRUE); |
288 | SvUPGRADE(sv, SVt_IV); | |
463ee0b2 | 289 | SvIVX(sv) = pid; |
6e21c824 | 290 | fclose(fp); |
bee1dbe2 | 291 | |
6e21c824 LW |
292 | } |
293 | fp = saveifp; | |
bee1dbe2 | 294 | clearerr(fp); |
6e21c824 | 295 | } |
79072805 | 296 | #if defined(HAS_FCNTL) && defined(FFt_SETFD) |
1462b684 | 297 | fd = fileno(fp); |
79072805 | 298 | fcntl(fd,FFt_SETFD,fd > maxsysfd); |
1462b684 | 299 | #endif |
8990e307 | 300 | IoIFP(io) = fp; |
bf38876a | 301 | if (writing) { |
8990e307 LW |
302 | if (IoTYPE(io) == 's' |
303 | || (IoTYPE(io) == '>' && S_ISCHR(statbuf.st_mode)) ) { | |
304 | if (!(IoOFP(io) = fdopen(fileno(fp),"w"))) { | |
fe14fcc3 | 305 | fclose(fp); |
8990e307 | 306 | IoIFP(io) = Nullfp; |
6e21c824 | 307 | goto say_false; |
fe14fcc3 | 308 | } |
1462b684 LW |
309 | } |
310 | else | |
8990e307 | 311 | IoOFP(io) = fp; |
bf38876a | 312 | } |
a687059c | 313 | return TRUE; |
6e21c824 LW |
314 | |
315 | say_false: | |
8990e307 LW |
316 | IoIFP(io) = saveifp; |
317 | IoOFP(io) = saveofp; | |
318 | IoTYPE(io) = savetype; | |
6e21c824 | 319 | return FALSE; |
a687059c LW |
320 | } |
321 | ||
322 | FILE * | |
79072805 LW |
323 | nextargv(gv) |
324 | register GV *gv; | |
a687059c | 325 | { |
79072805 | 326 | register SV *sv; |
99b89507 | 327 | #ifndef FLEXFILENAMES |
c623bd54 LW |
328 | int filedev; |
329 | int fileino; | |
99b89507 | 330 | #endif |
c623bd54 LW |
331 | int fileuid; |
332 | int filegid; | |
fe14fcc3 | 333 | |
79072805 | 334 | if (!argvoutgv) |
85e6fe83 | 335 | argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO); |
fe14fcc3 | 336 | if (filemode & (S_ISUID|S_ISGID)) { |
8990e307 | 337 | fflush(IoIFP(GvIO(argvoutgv))); /* chmod must follow last write */ |
fe14fcc3 LW |
338 | #ifdef HAS_FCHMOD |
339 | (void)fchmod(lastfd,filemode); | |
340 | #else | |
341 | (void)chmod(oldname,filemode); | |
342 | #endif | |
343 | } | |
344 | filemode = 0; | |
79072805 | 345 | while (av_len(GvAV(gv)) >= 0) { |
463ee0b2 | 346 | STRLEN len; |
79072805 | 347 | sv = av_shift(GvAV(gv)); |
8990e307 | 348 | SAVEFREESV(sv); |
79072805 LW |
349 | sv_setsv(GvSV(gv),sv); |
350 | SvSETMAGIC(GvSV(gv)); | |
463ee0b2 LW |
351 | oldname = SvPVx(GvSV(gv), len); |
352 | if (do_open(gv,oldname,len)) { | |
a687059c | 353 | if (inplace) { |
79072805 | 354 | TAINT_PROPER("inplace open"); |
c623bd54 | 355 | if (strEQ(oldname,"-")) { |
85e6fe83 | 356 | defoutgv = gv_fetchpv("STDOUT",TRUE,SVt_PVIO); |
8990e307 | 357 | return IoIFP(GvIO(gv)); |
c623bd54 | 358 | } |
99b89507 | 359 | #ifndef FLEXFILENAMES |
c623bd54 LW |
360 | filedev = statbuf.st_dev; |
361 | fileino = statbuf.st_ino; | |
99b89507 | 362 | #endif |
a687059c LW |
363 | filemode = statbuf.st_mode; |
364 | fileuid = statbuf.st_uid; | |
365 | filegid = statbuf.st_gid; | |
c623bd54 LW |
366 | if (!S_ISREG(filemode)) { |
367 | warn("Can't do inplace edit: %s is not a regular file", | |
368 | oldname ); | |
79072805 | 369 | do_close(gv,FALSE); |
c623bd54 LW |
370 | continue; |
371 | } | |
a687059c | 372 | if (*inplace) { |
ff8e2863 | 373 | #ifdef SUFFIX |
79072805 | 374 | add_suffix(sv,inplace); |
ff8e2863 | 375 | #else |
79072805 | 376 | sv_catpv(sv,inplace); |
ff8e2863 | 377 | #endif |
c623bd54 | 378 | #ifndef FLEXFILENAMES |
463ee0b2 | 379 | if (stat(SvPVX(sv),&statbuf) >= 0 |
c623bd54 LW |
380 | && statbuf.st_dev == filedev |
381 | && statbuf.st_ino == fileino ) { | |
382 | warn("Can't do inplace edit: %s > 14 characters", | |
463ee0b2 | 383 | SvPVX(sv) ); |
79072805 | 384 | do_close(gv,FALSE); |
c623bd54 LW |
385 | continue; |
386 | } | |
387 | #endif | |
fe14fcc3 | 388 | #ifdef HAS_RENAME |
bee1dbe2 | 389 | #ifndef DOSISH |
463ee0b2 | 390 | if (rename(oldname,SvPVX(sv)) < 0) { |
c623bd54 | 391 | warn("Can't rename %s to %s: %s, skipping file", |
2304df62 | 392 | oldname, SvPVX(sv), Strerror(errno) ); |
79072805 | 393 | do_close(gv,FALSE); |
c623bd54 LW |
394 | continue; |
395 | } | |
a687059c | 396 | #else |
79072805 | 397 | do_close(gv,FALSE); |
463ee0b2 LW |
398 | (void)unlink(SvPVX(sv)); |
399 | (void)rename(oldname,SvPVX(sv)); | |
400 | do_open(gv,SvPVX(sv),SvCUR(GvSV(gv))); | |
ff8e2863 LW |
401 | #endif /* MSDOS */ |
402 | #else | |
463ee0b2 LW |
403 | (void)UNLINK(SvPVX(sv)); |
404 | if (link(oldname,SvPVX(sv)) < 0) { | |
c623bd54 | 405 | warn("Can't rename %s to %s: %s, skipping file", |
2304df62 | 406 | oldname, SvPVX(sv), Strerror(errno) ); |
79072805 | 407 | do_close(gv,FALSE); |
c623bd54 LW |
408 | continue; |
409 | } | |
a687059c LW |
410 | (void)UNLINK(oldname); |
411 | #endif | |
412 | } | |
413 | else { | |
bee1dbe2 | 414 | #ifndef DOSISH |
fe14fcc3 LW |
415 | if (UNLINK(oldname) < 0) { |
416 | warn("Can't rename %s to %s: %s, skipping file", | |
2304df62 | 417 | oldname, SvPVX(sv), Strerror(errno) ); |
79072805 | 418 | do_close(gv,FALSE); |
fe14fcc3 LW |
419 | continue; |
420 | } | |
ff8e2863 | 421 | #else |
463ee0b2 | 422 | croak("Can't do inplace edit without backup"); |
ff8e2863 | 423 | #endif |
a687059c LW |
424 | } |
425 | ||
79072805 LW |
426 | sv_setpvn(sv,">",1); |
427 | sv_catpv(sv,oldname); | |
a687059c | 428 | errno = 0; /* in case sprintf set errno */ |
463ee0b2 | 429 | if (!do_open(argvoutgv,SvPVX(sv),SvCUR(sv))) { |
c623bd54 | 430 | warn("Can't do inplace edit on %s: %s", |
2304df62 | 431 | oldname, Strerror(errno) ); |
79072805 | 432 | do_close(gv,FALSE); |
fe14fcc3 LW |
433 | continue; |
434 | } | |
79072805 | 435 | defoutgv = argvoutgv; |
8990e307 | 436 | lastfd = fileno(IoIFP(GvIO(argvoutgv))); |
fe14fcc3 LW |
437 | (void)fstat(lastfd,&statbuf); |
438 | #ifdef HAS_FCHMOD | |
439 | (void)fchmod(lastfd,filemode); | |
a687059c LW |
440 | #else |
441 | (void)chmod(oldname,filemode); | |
442 | #endif | |
fe14fcc3 LW |
443 | if (fileuid != statbuf.st_uid || filegid != statbuf.st_gid) { |
444 | #ifdef HAS_FCHOWN | |
445 | (void)fchown(lastfd,fileuid,filegid); | |
a687059c | 446 | #else |
fe14fcc3 LW |
447 | #ifdef HAS_CHOWN |
448 | (void)chown(oldname,fileuid,filegid); | |
a687059c | 449 | #endif |
b1248f16 | 450 | #endif |
fe14fcc3 | 451 | } |
a687059c | 452 | } |
8990e307 | 453 | return IoIFP(GvIO(gv)); |
a687059c LW |
454 | } |
455 | else | |
2304df62 | 456 | fprintf(stderr,"Can't open %s: %s\n",SvPV(sv, na), Strerror(errno)); |
a687059c LW |
457 | } |
458 | if (inplace) { | |
79072805 | 459 | (void)do_close(argvoutgv,FALSE); |
85e6fe83 | 460 | defoutgv = gv_fetchpv("STDOUT",TRUE,SVt_PVIO); |
a687059c LW |
461 | } |
462 | return Nullfp; | |
463 | } | |
464 | ||
fe14fcc3 | 465 | #ifdef HAS_PIPE |
afd9f252 | 466 | void |
79072805 LW |
467 | do_pipe(sv, rgv, wgv) |
468 | SV *sv; | |
469 | GV *rgv; | |
470 | GV *wgv; | |
afd9f252 | 471 | { |
79072805 LW |
472 | register IO *rstio; |
473 | register IO *wstio; | |
afd9f252 LW |
474 | int fd[2]; |
475 | ||
79072805 | 476 | if (!rgv) |
afd9f252 | 477 | goto badexit; |
79072805 | 478 | if (!wgv) |
afd9f252 LW |
479 | goto badexit; |
480 | ||
79072805 LW |
481 | rstio = GvIO(rgv); |
482 | wstio = GvIO(wgv); | |
afd9f252 LW |
483 | |
484 | if (!rstio) | |
79072805 | 485 | rstio = GvIO(rgv) = newIO(); |
8990e307 | 486 | else if (IoIFP(rstio)) |
79072805 | 487 | do_close(rgv,FALSE); |
afd9f252 | 488 | if (!wstio) |
79072805 | 489 | wstio = GvIO(wgv) = newIO(); |
8990e307 | 490 | else if (IoIFP(wstio)) |
79072805 | 491 | do_close(wgv,FALSE); |
afd9f252 LW |
492 | |
493 | if (pipe(fd) < 0) | |
494 | goto badexit; | |
8990e307 LW |
495 | IoIFP(rstio) = fdopen(fd[0], "r"); |
496 | IoOFP(wstio) = fdopen(fd[1], "w"); | |
497 | IoIFP(wstio) = IoOFP(wstio); | |
498 | IoTYPE(rstio) = '<'; | |
499 | IoTYPE(wstio) = '>'; | |
500 | if (!IoIFP(rstio) || !IoOFP(wstio)) { | |
501 | if (IoIFP(rstio)) fclose(IoIFP(rstio)); | |
fe14fcc3 | 502 | else close(fd[0]); |
8990e307 | 503 | if (IoOFP(wstio)) fclose(IoOFP(wstio)); |
fe14fcc3 LW |
504 | else close(fd[1]); |
505 | goto badexit; | |
506 | } | |
afd9f252 | 507 | |
79072805 | 508 | sv_setsv(sv,&sv_yes); |
afd9f252 LW |
509 | return; |
510 | ||
511 | badexit: | |
79072805 | 512 | sv_setsv(sv,&sv_undef); |
afd9f252 LW |
513 | return; |
514 | } | |
b1248f16 | 515 | #endif |
afd9f252 | 516 | |
a687059c | 517 | bool |
8990e307 | 518 | #ifndef STANDARD_C |
79072805 LW |
519 | do_close(gv,explicit) |
520 | GV *gv; | |
a687059c | 521 | bool explicit; |
8990e307 LW |
522 | #else |
523 | do_close(GV *gv, bool explicit) | |
524 | #endif /* STANDARD_C */ | |
a687059c LW |
525 | { |
526 | bool retval = FALSE; | |
79072805 | 527 | register IO *io; |
a687059c LW |
528 | int status; |
529 | ||
79072805 LW |
530 | if (!gv) |
531 | gv = argvgv; | |
532 | if (!gv) { | |
99b89507 | 533 | errno = EBADF; |
c2ab57d4 | 534 | return FALSE; |
99b89507 | 535 | } |
79072805 LW |
536 | io = GvIO(gv); |
537 | if (!io) { /* never opened */ | |
a687059c | 538 | if (dowarn && explicit) |
79072805 | 539 | warn("Close on unopened file <%s>",GvENAME(gv)); |
a687059c LW |
540 | return FALSE; |
541 | } | |
8990e307 LW |
542 | if (IoIFP(io)) { |
543 | if (IoTYPE(io) == '|') { | |
544 | status = my_pclose(IoIFP(io)); | |
c623bd54 | 545 | retval = (status == 0); |
b1248f16 | 546 | statusvalue = (unsigned short)status & 0xffff; |
a687059c | 547 | } |
8990e307 | 548 | else if (IoTYPE(io) == '-') |
a687059c LW |
549 | retval = TRUE; |
550 | else { | |
8990e307 LW |
551 | if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */ |
552 | retval = (fclose(IoOFP(io)) != EOF); | |
553 | fclose(IoIFP(io)); /* clear stdio, fd already closed */ | |
c2ab57d4 LW |
554 | } |
555 | else | |
8990e307 | 556 | retval = (fclose(IoIFP(io)) != EOF); |
a687059c | 557 | } |
8990e307 | 558 | IoOFP(io) = IoIFP(io) = Nullfp; |
79072805 LW |
559 | } |
560 | if (explicit) { | |
8990e307 LW |
561 | IoLINES(io) = 0; |
562 | IoPAGE(io) = 0; | |
563 | IoLINES_LEFT(io) = IoPAGE_LEN(io); | |
a687059c | 564 | } |
8990e307 | 565 | IoTYPE(io) = ' '; |
a687059c LW |
566 | return retval; |
567 | } | |
568 | ||
569 | bool | |
79072805 LW |
570 | do_eof(gv) |
571 | GV *gv; | |
a687059c | 572 | { |
79072805 | 573 | register IO *io; |
a687059c LW |
574 | int ch; |
575 | ||
79072805 | 576 | io = GvIO(gv); |
a687059c | 577 | |
79072805 | 578 | if (!io) |
a687059c LW |
579 | return TRUE; |
580 | ||
8990e307 | 581 | while (IoIFP(io)) { |
a687059c | 582 | |
85e6fe83 | 583 | #ifdef USE_STD_STDIO /* (the code works without this) */ |
8990e307 | 584 | if (IoIFP(io)->_cnt > 0) /* cheat a little, since */ |
a687059c LW |
585 | return FALSE; /* this is the most usual case */ |
586 | #endif | |
587 | ||
8990e307 | 588 | ch = getc(IoIFP(io)); |
a687059c | 589 | if (ch != EOF) { |
8990e307 | 590 | (void)ungetc(ch, IoIFP(io)); |
a687059c LW |
591 | return FALSE; |
592 | } | |
85e6fe83 | 593 | #ifdef USE_STD_STDIO |
8990e307 LW |
594 | if (IoIFP(io)->_cnt < -1) |
595 | IoIFP(io)->_cnt = -1; | |
fe14fcc3 | 596 | #endif |
8990e307 | 597 | if (op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */ |
79072805 | 598 | if (!nextargv(argvgv)) /* get another fp handy */ |
a687059c LW |
599 | return TRUE; |
600 | } | |
601 | else | |
602 | return TRUE; /* normal fp, definitely end of file */ | |
603 | } | |
604 | return TRUE; | |
605 | } | |
606 | ||
607 | long | |
79072805 LW |
608 | do_tell(gv) |
609 | GV *gv; | |
a687059c | 610 | { |
79072805 | 611 | register IO *io; |
a687059c | 612 | |
79072805 | 613 | if (!gv) |
a687059c LW |
614 | goto phooey; |
615 | ||
79072805 | 616 | io = GvIO(gv); |
8990e307 | 617 | if (!io || !IoIFP(io)) |
a687059c LW |
618 | goto phooey; |
619 | ||
bee1dbe2 | 620 | #ifdef ULTRIX_STDIO_BOTCH |
8990e307 LW |
621 | if (feof(IoIFP(io))) |
622 | (void)fseek (IoIFP(io), 0L, 2); /* ultrix 1.2 workaround */ | |
bee1dbe2 | 623 | #endif |
a687059c | 624 | |
8990e307 | 625 | return ftell(IoIFP(io)); |
a687059c LW |
626 | |
627 | phooey: | |
628 | if (dowarn) | |
629 | warn("tell() on unopened file"); | |
99b89507 | 630 | errno = EBADF; |
a687059c LW |
631 | return -1L; |
632 | } | |
633 | ||
634 | bool | |
79072805 LW |
635 | do_seek(gv, pos, whence) |
636 | GV *gv; | |
a687059c LW |
637 | long pos; |
638 | int whence; | |
639 | { | |
79072805 | 640 | register IO *io; |
a687059c | 641 | |
79072805 | 642 | if (!gv) |
a687059c LW |
643 | goto nuts; |
644 | ||
79072805 | 645 | io = GvIO(gv); |
8990e307 | 646 | if (!io || !IoIFP(io)) |
a687059c LW |
647 | goto nuts; |
648 | ||
bee1dbe2 | 649 | #ifdef ULTRIX_STDIO_BOTCH |
8990e307 LW |
650 | if (feof(IoIFP(io))) |
651 | (void)fseek (IoIFP(io), 0L, 2); /* ultrix 1.2 workaround */ | |
bee1dbe2 | 652 | #endif |
a687059c | 653 | |
8990e307 | 654 | return fseek(IoIFP(io), pos, whence) >= 0; |
a687059c LW |
655 | |
656 | nuts: | |
657 | if (dowarn) | |
658 | warn("seek() on unopened file"); | |
99b89507 | 659 | errno = EBADF; |
a687059c LW |
660 | return FALSE; |
661 | } | |
662 | ||
79072805 LW |
663 | I32 |
664 | do_ctl(optype,gv,func,argstr) | |
665 | I32 optype; | |
666 | GV *gv; | |
667 | I32 func; | |
668 | SV *argstr; | |
a687059c | 669 | { |
79072805 | 670 | register IO *io; |
a687059c | 671 | register char *s; |
79072805 | 672 | I32 retval; |
a687059c | 673 | |
8990e307 | 674 | if (!gv || !argstr || !(io = GvIO(gv)) || !IoIFP(io)) { |
99b89507 | 675 | errno = EBADF; /* well, sort of... */ |
a687059c | 676 | return -1; |
99b89507 | 677 | } |
a687059c | 678 | |
79072805 LW |
679 | if (SvPOK(argstr) || !SvNIOK(argstr)) { |
680 | if (!SvPOK(argstr)) | |
463ee0b2 | 681 | s = SvPV(argstr, na); |
a687059c LW |
682 | |
683 | #ifdef IOCPARM_MASK | |
684 | #ifndef IOCPARM_LEN | |
685 | #define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK) | |
686 | #endif | |
687 | #endif | |
688 | #ifdef IOCPARM_LEN | |
689 | retval = IOCPARM_LEN(func); /* on BSDish systes we're safe */ | |
690 | #else | |
691 | retval = 256; /* otherwise guess at what's safe */ | |
692 | #endif | |
79072805 LW |
693 | if (SvCUR(argstr) < retval) { |
694 | Sv_Grow(argstr,retval+1); | |
695 | SvCUR_set(argstr, retval); | |
a687059c LW |
696 | } |
697 | ||
463ee0b2 | 698 | s = SvPVX(argstr); |
79072805 | 699 | s[SvCUR(argstr)] = 17; /* a little sanity check here */ |
a687059c LW |
700 | } |
701 | else { | |
463ee0b2 | 702 | retval = SvIV(argstr); |
bee1dbe2 | 703 | #ifdef DOSISH |
c2ab57d4 LW |
704 | s = (char*)(long)retval; /* ouch */ |
705 | #else | |
a687059c | 706 | s = (char*)retval; /* ouch */ |
c2ab57d4 | 707 | #endif |
a687059c LW |
708 | } |
709 | ||
710 | #ifndef lint | |
79072805 | 711 | if (optype == OP_IOCTL) |
8990e307 | 712 | retval = ioctl(fileno(IoIFP(io)), func, s); |
a687059c | 713 | else |
bee1dbe2 | 714 | #ifdef DOSISH |
463ee0b2 | 715 | croak("fcntl is not implemented"); |
57ebbfd0 | 716 | #else |
fe14fcc3 | 717 | #ifdef HAS_FCNTL |
8990e307 | 718 | retval = fcntl(fileno(IoIFP(io)), func, s); |
a687059c | 719 | #else |
463ee0b2 | 720 | croak("fcntl is not implemented"); |
a687059c | 721 | #endif |
57ebbfd0 | 722 | #endif |
a687059c LW |
723 | #else /* lint */ |
724 | retval = 0; | |
725 | #endif /* lint */ | |
726 | ||
79072805 LW |
727 | if (SvPOK(argstr)) { |
728 | if (s[SvCUR(argstr)] != 17) | |
463ee0b2 | 729 | croak("Return value overflowed string"); |
79072805 | 730 | s[SvCUR(argstr)] = 0; /* put our null back */ |
a687059c LW |
731 | } |
732 | return retval; | |
733 | } | |
734 | ||
79072805 | 735 | #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(FFt_FREESP) |
c2ab57d4 | 736 | /* code courtesy of William Kucharski */ |
fe14fcc3 | 737 | #define HAS_CHSIZE |
6eb13c3b | 738 | |
79072805 LW |
739 | I32 chsize(fd, length) |
740 | I32 fd; /* file descriptor */ | |
85e6fe83 | 741 | Off_t length; /* length to set file to */ |
6eb13c3b LW |
742 | { |
743 | extern long lseek(); | |
744 | struct flock fl; | |
745 | struct stat filebuf; | |
746 | ||
747 | if (fstat(fd, &filebuf) < 0) | |
748 | return -1; | |
749 | ||
750 | if (filebuf.st_size < length) { | |
751 | ||
752 | /* extend file length */ | |
753 | ||
754 | if ((lseek(fd, (length - 1), 0)) < 0) | |
755 | return -1; | |
756 | ||
757 | /* write a "0" byte */ | |
758 | ||
759 | if ((write(fd, "", 1)) != 1) | |
760 | return -1; | |
761 | } | |
762 | else { | |
763 | /* truncate length */ | |
764 | ||
765 | fl.l_whence = 0; | |
766 | fl.l_len = 0; | |
767 | fl.l_start = length; | |
79072805 | 768 | fl.l_type = FFt_WRLCK; /* write lock on file space */ |
6eb13c3b LW |
769 | |
770 | /* | |
79072805 | 771 | * This relies on the UNDOCUMENTED FFt_FREESP argument to |
6eb13c3b LW |
772 | * fcntl(2), which truncates the file so that it ends at the |
773 | * position indicated by fl.l_start. | |
774 | * | |
775 | * Will minor miracles never cease? | |
776 | */ | |
777 | ||
79072805 | 778 | if (fcntl(fd, FFt_FREESP, &fl) < 0) |
6eb13c3b LW |
779 | return -1; |
780 | ||
781 | } | |
782 | ||
783 | return 0; | |
784 | } | |
79072805 | 785 | #endif /* FFt_FREESP */ |
ff8e2863 | 786 | |
79072805 LW |
787 | I32 |
788 | looks_like_number(sv) | |
789 | SV *sv; | |
a687059c LW |
790 | { |
791 | register char *s; | |
792 | register char *send; | |
793 | ||
463ee0b2 LW |
794 | if (!SvPOK(sv)) { |
795 | STRLEN len; | |
796 | if (!SvPOKp(sv)) | |
797 | return TRUE; | |
798 | s = SvPV(sv, len); | |
799 | send = s + len; | |
800 | } | |
801 | else { | |
802 | s = SvPVX(sv); | |
803 | send = s + SvCUR(sv); | |
804 | } | |
99b89507 | 805 | while (isSPACE(*s)) |
a687059c LW |
806 | s++; |
807 | if (s >= send) | |
808 | return FALSE; | |
809 | if (*s == '+' || *s == '-') | |
810 | s++; | |
99b89507 | 811 | while (isDIGIT(*s)) |
a687059c LW |
812 | s++; |
813 | if (s == send) | |
814 | return TRUE; | |
815 | if (*s == '.') | |
816 | s++; | |
463ee0b2 | 817 | else if (s == SvPVX(sv)) |
a687059c | 818 | return FALSE; |
99b89507 | 819 | while (isDIGIT(*s)) |
a687059c LW |
820 | s++; |
821 | if (s == send) | |
822 | return TRUE; | |
823 | if (*s == 'e' || *s == 'E') { | |
824 | s++; | |
825 | if (*s == '+' || *s == '-') | |
826 | s++; | |
99b89507 | 827 | while (isDIGIT(*s)) |
a687059c LW |
828 | s++; |
829 | } | |
99b89507 | 830 | while (isSPACE(*s)) |
a687059c LW |
831 | s++; |
832 | if (s >= send) | |
833 | return TRUE; | |
834 | return FALSE; | |
835 | } | |
836 | ||
837 | bool | |
79072805 LW |
838 | do_print(sv,fp) |
839 | register SV *sv; | |
a687059c LW |
840 | FILE *fp; |
841 | { | |
842 | register char *tmps; | |
79072805 | 843 | SV* tmpstr; |
463ee0b2 | 844 | STRLEN len; |
a687059c | 845 | |
79072805 LW |
846 | /* assuming fp is checked earlier */ |
847 | if (!sv) | |
848 | return TRUE; | |
849 | if (ofmt) { | |
8990e307 | 850 | if (SvGMAGICAL(sv)) |
79072805 | 851 | mg_get(sv); |
463ee0b2 LW |
852 | if (SvIOK(sv) && SvIVX(sv) != 0) { |
853 | fprintf(fp, ofmt, (double)SvIVX(sv)); | |
79072805 LW |
854 | return !ferror(fp); |
855 | } | |
463ee0b2 | 856 | if ( (SvNOK(sv) && SvNVX(sv) != 0.0) |
79072805 | 857 | || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) { |
463ee0b2 | 858 | fprintf(fp, ofmt, SvNVX(sv)); |
79072805 LW |
859 | return !ferror(fp); |
860 | } | |
a687059c | 861 | } |
79072805 LW |
862 | switch (SvTYPE(sv)) { |
863 | case SVt_NULL: | |
8990e307 LW |
864 | if (dowarn) |
865 | warn(warn_uninit); | |
ff8e2863 | 866 | return TRUE; |
79072805 | 867 | case SVt_IV: |
8990e307 | 868 | if (SvGMAGICAL(sv)) |
79072805 | 869 | mg_get(sv); |
463ee0b2 | 870 | fprintf(fp, "%d", SvIVX(sv)); |
79072805 LW |
871 | return !ferror(fp); |
872 | default: | |
463ee0b2 | 873 | tmps = SvPV(sv, len); |
79072805 | 874 | break; |
ff8e2863 | 875 | } |
463ee0b2 | 876 | if (len && (fwrite(tmps,1,len,fp) == 0 || ferror(fp))) |
a687059c | 877 | return FALSE; |
79072805 | 878 | return TRUE; |
a687059c LW |
879 | } |
880 | ||
79072805 LW |
881 | I32 |
882 | my_stat(ARGS) | |
883 | dARGS | |
a687059c | 884 | { |
79072805 LW |
885 | dSP; |
886 | IO *io; | |
887 | ||
888 | if (op->op_flags & OPf_SPECIAL) { | |
889 | EXTEND(sp,1); | |
890 | io = GvIO(cGVOP->op_gv); | |
8990e307 | 891 | if (io && IoIFP(io)) { |
79072805 LW |
892 | statgv = cGVOP->op_gv; |
893 | sv_setpv(statname,""); | |
894 | laststype = OP_STAT; | |
8990e307 | 895 | return (laststatval = fstat(fileno(IoIFP(io)), &statcache)); |
a687059c LW |
896 | } |
897 | else { | |
79072805 | 898 | if (cGVOP->op_gv == defgv) |
57ebbfd0 | 899 | return laststatval; |
a687059c LW |
900 | if (dowarn) |
901 | warn("Stat on unopened file <%s>", | |
79072805 LW |
902 | GvENAME(cGVOP->op_gv)); |
903 | statgv = Nullgv; | |
904 | sv_setpv(statname,""); | |
57ebbfd0 | 905 | return (laststatval = -1); |
a687059c LW |
906 | } |
907 | } | |
908 | else { | |
79072805 LW |
909 | dPOPss; |
910 | PUTBACK; | |
911 | statgv = Nullgv; | |
463ee0b2 | 912 | sv_setpv(statname,SvPV(sv, na)); |
79072805 | 913 | laststype = OP_STAT; |
463ee0b2 LW |
914 | laststatval = stat(SvPV(sv, na),&statcache); |
915 | if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n')) | |
bee1dbe2 LW |
916 | warn(warn_nl, "stat"); |
917 | return laststatval; | |
a687059c LW |
918 | } |
919 | } | |
920 | ||
79072805 LW |
921 | I32 |
922 | my_lstat(ARGS) | |
923 | dARGS | |
c623bd54 | 924 | { |
79072805 LW |
925 | dSP; |
926 | SV *sv; | |
927 | if (op->op_flags & OPf_SPECIAL) { | |
928 | EXTEND(sp,1); | |
929 | if (cGVOP->op_gv == defgv) { | |
930 | if (laststype != OP_LSTAT) | |
463ee0b2 | 931 | croak("The stat preceding -l _ wasn't an lstat"); |
fe14fcc3 LW |
932 | return laststatval; |
933 | } | |
463ee0b2 | 934 | croak("You can't use -l on a filehandle"); |
fe14fcc3 | 935 | } |
c623bd54 | 936 | |
79072805 LW |
937 | laststype = OP_LSTAT; |
938 | statgv = Nullgv; | |
939 | sv = POPs; | |
940 | PUTBACK; | |
463ee0b2 | 941 | sv_setpv(statname,SvPV(sv, na)); |
fe14fcc3 | 942 | #ifdef HAS_LSTAT |
463ee0b2 | 943 | laststatval = lstat(SvPV(sv, na),&statcache); |
c623bd54 | 944 | #else |
463ee0b2 | 945 | laststatval = stat(SvPV(sv, na),&statcache); |
c623bd54 | 946 | #endif |
463ee0b2 | 947 | if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n')) |
bee1dbe2 LW |
948 | warn(warn_nl, "lstat"); |
949 | return laststatval; | |
c623bd54 LW |
950 | } |
951 | ||
a687059c | 952 | bool |
79072805 LW |
953 | do_aexec(really,mark,sp) |
954 | SV *really; | |
955 | register SV **mark; | |
956 | register SV **sp; | |
a687059c | 957 | { |
a687059c | 958 | register char **a; |
a687059c LW |
959 | char *tmps; |
960 | ||
79072805 LW |
961 | if (sp > mark) { |
962 | New(401,Argv, sp - mark + 1, char*); | |
bee1dbe2 | 963 | a = Argv; |
79072805 LW |
964 | while (++mark <= sp) { |
965 | if (*mark) | |
463ee0b2 | 966 | *a++ = SvPVx(*mark, na); |
a687059c LW |
967 | else |
968 | *a++ = ""; | |
969 | } | |
970 | *a = Nullch; | |
bee1dbe2 | 971 | if (*Argv[0] != '/') /* will execvp use PATH? */ |
79072805 | 972 | TAINT_ENV(); /* testing IFS here is overkill, probably */ |
463ee0b2 | 973 | if (really && *(tmps = SvPV(really, na))) |
bee1dbe2 | 974 | execvp(tmps,Argv); |
a687059c | 975 | else |
bee1dbe2 | 976 | execvp(Argv[0],Argv); |
a687059c | 977 | } |
bee1dbe2 | 978 | do_execfree(); |
a687059c LW |
979 | return FALSE; |
980 | } | |
981 | ||
fe14fcc3 | 982 | void |
ff8e2863 LW |
983 | do_execfree() |
984 | { | |
985 | if (Argv) { | |
986 | Safefree(Argv); | |
987 | Argv = Null(char **); | |
988 | } | |
989 | if (Cmd) { | |
990 | Safefree(Cmd); | |
991 | Cmd = Nullch; | |
992 | } | |
993 | } | |
994 | ||
a687059c LW |
995 | bool |
996 | do_exec(cmd) | |
997 | char *cmd; | |
998 | { | |
999 | register char **a; | |
1000 | register char *s; | |
a687059c LW |
1001 | char flags[10]; |
1002 | ||
a687059c LW |
1003 | /* save an extra exec if possible */ |
1004 | ||
bf38876a LW |
1005 | #ifdef CSH |
1006 | if (strnEQ(cmd,cshname,cshlen) && strnEQ(cmd+cshlen," -c",3)) { | |
a687059c | 1007 | strcpy(flags,"-c"); |
bf38876a | 1008 | s = cmd+cshlen+3; |
a687059c LW |
1009 | if (*s == 'f') { |
1010 | s++; | |
1011 | strcat(flags,"f"); | |
1012 | } | |
1013 | if (*s == ' ') | |
1014 | s++; | |
1015 | if (*s++ == '\'') { | |
1016 | char *ncmd = s; | |
1017 | ||
1018 | while (*s) | |
1019 | s++; | |
1020 | if (s[-1] == '\n') | |
1021 | *--s = '\0'; | |
1022 | if (s[-1] == '\'') { | |
1023 | *--s = '\0'; | |
bf38876a | 1024 | execl(cshname,"csh", flags,ncmd,(char*)0); |
a687059c LW |
1025 | *s = '\''; |
1026 | return FALSE; | |
1027 | } | |
1028 | } | |
1029 | } | |
bf38876a | 1030 | #endif /* CSH */ |
a687059c LW |
1031 | |
1032 | /* see if there are shell metacharacters in it */ | |
1033 | ||
99b89507 LW |
1034 | /*SUPPRESS 530*/ |
1035 | for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */ | |
63f2c1e1 LW |
1036 | if (*s == '=') |
1037 | goto doshell; | |
a687059c | 1038 | for (s = cmd; *s; s++) { |
93a17b20 | 1039 | if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) { |
a687059c LW |
1040 | if (*s == '\n' && !s[1]) { |
1041 | *s = '\0'; | |
1042 | break; | |
1043 | } | |
1044 | doshell: | |
1045 | execl("/bin/sh","sh","-c",cmd,(char*)0); | |
1046 | return FALSE; | |
1047 | } | |
1048 | } | |
ff8e2863 LW |
1049 | New(402,Argv, (s - cmd) / 2 + 2, char*); |
1050 | Cmd = nsavestr(cmd, s-cmd); | |
1051 | a = Argv; | |
1052 | for (s = Cmd; *s;) { | |
99b89507 | 1053 | while (*s && isSPACE(*s)) s++; |
a687059c LW |
1054 | if (*s) |
1055 | *(a++) = s; | |
99b89507 | 1056 | while (*s && !isSPACE(*s)) s++; |
a687059c LW |
1057 | if (*s) |
1058 | *s++ = '\0'; | |
1059 | } | |
1060 | *a = Nullch; | |
ff8e2863 LW |
1061 | if (Argv[0]) { |
1062 | execvp(Argv[0],Argv); | |
b1248f16 | 1063 | if (errno == ENOEXEC) { /* for system V NIH syndrome */ |
ff8e2863 | 1064 | do_execfree(); |
a687059c | 1065 | goto doshell; |
b1248f16 | 1066 | } |
a687059c | 1067 | } |
ff8e2863 | 1068 | do_execfree(); |
a687059c LW |
1069 | return FALSE; |
1070 | } | |
1071 | ||
79072805 LW |
1072 | I32 |
1073 | apply(type,mark,sp) | |
1074 | I32 type; | |
1075 | register SV **mark; | |
1076 | register SV **sp; | |
a687059c | 1077 | { |
79072805 LW |
1078 | register I32 val; |
1079 | register I32 val2; | |
1080 | register I32 tot = 0; | |
a687059c | 1081 | char *s; |
79072805 | 1082 | SV **oldmark = mark; |
a687059c | 1083 | |
463ee0b2 LW |
1084 | if (tainting) { |
1085 | while (++mark <= sp) { | |
1086 | if (SvMAGICAL(*mark) && mg_find(*mark, 't')) | |
1087 | tainted = TRUE; | |
1088 | } | |
1089 | mark = oldmark; | |
1090 | } | |
a687059c | 1091 | switch (type) { |
79072805 LW |
1092 | case OP_CHMOD: |
1093 | TAINT_PROPER("chmod"); | |
1094 | if (++mark <= sp) { | |
1095 | tot = sp - mark; | |
463ee0b2 | 1096 | val = SvIVx(*mark); |
79072805 | 1097 | while (++mark <= sp) { |
463ee0b2 | 1098 | if (chmod(SvPVx(*mark, na),val)) |
a687059c LW |
1099 | tot--; |
1100 | } | |
1101 | } | |
1102 | break; | |
fe14fcc3 | 1103 | #ifdef HAS_CHOWN |
79072805 LW |
1104 | case OP_CHOWN: |
1105 | TAINT_PROPER("chown"); | |
1106 | if (sp - mark > 2) { | |
1107 | tot = sp - mark; | |
463ee0b2 LW |
1108 | val = SvIVx(*++mark); |
1109 | val2 = SvIVx(*++mark); | |
79072805 | 1110 | while (++mark <= sp) { |
463ee0b2 | 1111 | if (chown(SvPVx(*mark, na),val,val2)) |
a687059c LW |
1112 | tot--; |
1113 | } | |
1114 | } | |
1115 | break; | |
b1248f16 | 1116 | #endif |
fe14fcc3 | 1117 | #ifdef HAS_KILL |
79072805 LW |
1118 | case OP_KILL: |
1119 | TAINT_PROPER("kill"); | |
463ee0b2 | 1120 | s = SvPVx(*++mark, na); |
79072805 LW |
1121 | tot = sp - mark; |
1122 | if (isUPPER(*s)) { | |
1123 | if (*s == 'S' && s[1] == 'I' && s[2] == 'G') | |
1124 | s += 3; | |
1125 | if (!(val = whichsig(s))) | |
463ee0b2 | 1126 | croak("Unrecognized signal name \"%s\"",s); |
79072805 LW |
1127 | } |
1128 | else | |
463ee0b2 | 1129 | val = SvIVx(*mark); |
79072805 LW |
1130 | if (val < 0) { |
1131 | val = -val; | |
1132 | while (++mark <= sp) { | |
463ee0b2 | 1133 | I32 proc = SvIVx(*mark); |
fe14fcc3 | 1134 | #ifdef HAS_KILLPG |
79072805 | 1135 | if (killpg(proc,val)) /* BSD */ |
a687059c | 1136 | #else |
79072805 | 1137 | if (kill(-proc,val)) /* SYSV */ |
a687059c | 1138 | #endif |
79072805 | 1139 | tot--; |
a687059c | 1140 | } |
79072805 LW |
1141 | } |
1142 | else { | |
1143 | while (++mark <= sp) { | |
463ee0b2 | 1144 | if (kill(SvIVx(*mark),val)) |
79072805 | 1145 | tot--; |
a687059c LW |
1146 | } |
1147 | } | |
1148 | break; | |
b1248f16 | 1149 | #endif |
79072805 LW |
1150 | case OP_UNLINK: |
1151 | TAINT_PROPER("unlink"); | |
1152 | tot = sp - mark; | |
1153 | while (++mark <= sp) { | |
463ee0b2 | 1154 | s = SvPVx(*mark, na); |
a687059c LW |
1155 | if (euid || unsafe) { |
1156 | if (UNLINK(s)) | |
1157 | tot--; | |
1158 | } | |
1159 | else { /* don't let root wipe out directories without -U */ | |
fe14fcc3 | 1160 | #ifdef HAS_LSTAT |
c623bd54 | 1161 | if (lstat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode)) |
a687059c | 1162 | #else |
c623bd54 | 1163 | if (stat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode)) |
a687059c | 1164 | #endif |
a687059c LW |
1165 | tot--; |
1166 | else { | |
1167 | if (UNLINK(s)) | |
1168 | tot--; | |
1169 | } | |
1170 | } | |
1171 | } | |
1172 | break; | |
79072805 LW |
1173 | case OP_UTIME: |
1174 | TAINT_PROPER("utime"); | |
1175 | if (sp - mark > 2) { | |
663a0e37 LW |
1176 | #ifdef I_UTIME |
1177 | struct utimbuf utbuf; | |
1178 | #else | |
a687059c | 1179 | struct { |
663a0e37 LW |
1180 | long actime; |
1181 | long modtime; | |
a687059c | 1182 | } utbuf; |
663a0e37 | 1183 | #endif |
a687059c | 1184 | |
afd9f252 | 1185 | Zero(&utbuf, sizeof utbuf, char); |
463ee0b2 LW |
1186 | utbuf.actime = SvIVx(*++mark); /* time accessed */ |
1187 | utbuf.modtime = SvIVx(*++mark); /* time modified */ | |
79072805 LW |
1188 | tot = sp - mark; |
1189 | while (++mark <= sp) { | |
463ee0b2 | 1190 | if (utime(SvPVx(*mark, na),&utbuf)) |
a687059c LW |
1191 | tot--; |
1192 | } | |
a687059c LW |
1193 | } |
1194 | else | |
79072805 | 1195 | tot = 0; |
a687059c LW |
1196 | break; |
1197 | } | |
1198 | return tot; | |
1199 | } | |
1200 | ||
1201 | /* Do the permissions allow some operation? Assumes statcache already set. */ | |
1202 | ||
79072805 | 1203 | I32 |
a687059c | 1204 | cando(bit, effective, statbufp) |
79072805 LW |
1205 | I32 bit; |
1206 | I32 effective; | |
a687059c LW |
1207 | register struct stat *statbufp; |
1208 | { | |
bee1dbe2 | 1209 | #ifdef DOSISH |
fe14fcc3 LW |
1210 | /* [Comments and code from Len Reed] |
1211 | * MS-DOS "user" is similar to UNIX's "superuser," but can't write | |
1212 | * to write-protected files. The execute permission bit is set | |
1213 | * by the Miscrosoft C library stat() function for the following: | |
1214 | * .exe files | |
1215 | * .com files | |
1216 | * .bat files | |
1217 | * directories | |
1218 | * All files and directories are readable. | |
1219 | * Directories and special files, e.g. "CON", cannot be | |
1220 | * write-protected. | |
1221 | * [Comment by Tom Dinger -- a directory can have the write-protect | |
1222 | * bit set in the file system, but DOS permits changes to | |
1223 | * the directory anyway. In addition, all bets are off | |
1224 | * here for networked software, such as Novell and | |
1225 | * Sun's PC-NFS.] | |
1226 | */ | |
1227 | ||
bee1dbe2 LW |
1228 | /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat |
1229 | * too so it will actually look into the files for magic numbers | |
1230 | */ | |
fe14fcc3 LW |
1231 | return (bit & statbufp->st_mode) ? TRUE : FALSE; |
1232 | ||
1233 | #else /* ! MSDOS */ | |
a687059c | 1234 | if ((effective ? euid : uid) == 0) { /* root is special */ |
c623bd54 LW |
1235 | if (bit == S_IXUSR) { |
1236 | if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode)) | |
a687059c LW |
1237 | return TRUE; |
1238 | } | |
1239 | else | |
1240 | return TRUE; /* root reads and writes anything */ | |
1241 | return FALSE; | |
1242 | } | |
1243 | if (statbufp->st_uid == (effective ? euid : uid) ) { | |
1244 | if (statbufp->st_mode & bit) | |
1245 | return TRUE; /* ok as "user" */ | |
1246 | } | |
79072805 | 1247 | else if (ingroup((I32)statbufp->st_gid,effective)) { |
a687059c LW |
1248 | if (statbufp->st_mode & bit >> 3) |
1249 | return TRUE; /* ok as "group" */ | |
1250 | } | |
1251 | else if (statbufp->st_mode & bit >> 6) | |
1252 | return TRUE; /* ok as "other" */ | |
1253 | return FALSE; | |
fe14fcc3 | 1254 | #endif /* ! MSDOS */ |
a687059c LW |
1255 | } |
1256 | ||
79072805 | 1257 | I32 |
a687059c | 1258 | ingroup(testgid,effective) |
79072805 LW |
1259 | I32 testgid; |
1260 | I32 effective; | |
a687059c LW |
1261 | { |
1262 | if (testgid == (effective ? egid : gid)) | |
1263 | return TRUE; | |
fe14fcc3 | 1264 | #ifdef HAS_GETGROUPS |
a687059c LW |
1265 | #ifndef NGROUPS |
1266 | #define NGROUPS 32 | |
1267 | #endif | |
1268 | { | |
1c3d792e | 1269 | GROUPSTYPE gary[NGROUPS]; |
79072805 | 1270 | I32 anum; |
a687059c LW |
1271 | |
1272 | anum = getgroups(NGROUPS,gary); | |
1273 | while (--anum >= 0) | |
1274 | if (gary[anum] == testgid) | |
1275 | return TRUE; | |
1276 | } | |
1277 | #endif | |
1278 | return FALSE; | |
1279 | } | |
c2ab57d4 | 1280 | |
fe14fcc3 | 1281 | #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM) |
c2ab57d4 | 1282 | |
79072805 LW |
1283 | I32 |
1284 | do_ipcget(optype, mark, sp) | |
1285 | I32 optype; | |
1286 | SV **mark; | |
1287 | SV **sp; | |
c2ab57d4 | 1288 | { |
c2ab57d4 | 1289 | key_t key; |
79072805 | 1290 | I32 n, flags; |
c2ab57d4 | 1291 | |
463ee0b2 LW |
1292 | key = (key_t)SvNVx(*++mark); |
1293 | n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark); | |
1294 | flags = SvIVx(*++mark); | |
c2ab57d4 LW |
1295 | errno = 0; |
1296 | switch (optype) | |
1297 | { | |
fe14fcc3 | 1298 | #ifdef HAS_MSG |
79072805 | 1299 | case OP_MSGGET: |
c2ab57d4 | 1300 | return msgget(key, flags); |
e5d73d77 | 1301 | #endif |
fe14fcc3 | 1302 | #ifdef HAS_SEM |
79072805 | 1303 | case OP_SEMGET: |
c2ab57d4 | 1304 | return semget(key, n, flags); |
e5d73d77 | 1305 | #endif |
fe14fcc3 | 1306 | #ifdef HAS_SHM |
79072805 | 1307 | case OP_SHMGET: |
c2ab57d4 | 1308 | return shmget(key, n, flags); |
e5d73d77 | 1309 | #endif |
fe14fcc3 | 1310 | #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM) |
e5d73d77 | 1311 | default: |
463ee0b2 | 1312 | croak("%s not implemented", op_name[optype]); |
e5d73d77 | 1313 | #endif |
c2ab57d4 LW |
1314 | } |
1315 | return -1; /* should never happen */ | |
1316 | } | |
1317 | ||
79072805 LW |
1318 | I32 |
1319 | do_ipcctl(optype, mark, sp) | |
1320 | I32 optype; | |
1321 | SV **mark; | |
1322 | SV **sp; | |
c2ab57d4 | 1323 | { |
79072805 | 1324 | SV *astr; |
c2ab57d4 | 1325 | char *a; |
79072805 | 1326 | I32 id, n, cmd, infosize, getinfo, ret; |
c2ab57d4 | 1327 | |
463ee0b2 LW |
1328 | id = SvIVx(*++mark); |
1329 | n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0; | |
1330 | cmd = SvIVx(*++mark); | |
79072805 | 1331 | astr = *++mark; |
c2ab57d4 LW |
1332 | infosize = 0; |
1333 | getinfo = (cmd == IPC_STAT); | |
1334 | ||
1335 | switch (optype) | |
1336 | { | |
fe14fcc3 | 1337 | #ifdef HAS_MSG |
79072805 | 1338 | case OP_MSGCTL: |
c2ab57d4 LW |
1339 | if (cmd == IPC_STAT || cmd == IPC_SET) |
1340 | infosize = sizeof(struct msqid_ds); | |
1341 | break; | |
e5d73d77 | 1342 | #endif |
fe14fcc3 | 1343 | #ifdef HAS_SHM |
79072805 | 1344 | case OP_SHMCTL: |
c2ab57d4 LW |
1345 | if (cmd == IPC_STAT || cmd == IPC_SET) |
1346 | infosize = sizeof(struct shmid_ds); | |
1347 | break; | |
e5d73d77 | 1348 | #endif |
fe14fcc3 | 1349 | #ifdef HAS_SEM |
79072805 | 1350 | case OP_SEMCTL: |
c2ab57d4 LW |
1351 | if (cmd == IPC_STAT || cmd == IPC_SET) |
1352 | infosize = sizeof(struct semid_ds); | |
1353 | else if (cmd == GETALL || cmd == SETALL) | |
1354 | { | |
1355 | struct semid_ds semds; | |
1356 | if (semctl(id, 0, IPC_STAT, &semds) == -1) | |
1357 | return -1; | |
1358 | getinfo = (cmd == GETALL); | |
6e21c824 LW |
1359 | infosize = semds.sem_nsems * sizeof(short); |
1360 | /* "short" is technically wrong but much more portable | |
1361 | than guessing about u_?short(_t)? */ | |
c2ab57d4 LW |
1362 | } |
1363 | break; | |
e5d73d77 | 1364 | #endif |
fe14fcc3 | 1365 | #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM) |
e5d73d77 | 1366 | default: |
463ee0b2 | 1367 | croak("%s not implemented", op_name[optype]); |
e5d73d77 | 1368 | #endif |
c2ab57d4 LW |
1369 | } |
1370 | ||
1371 | if (infosize) | |
1372 | { | |
1373 | if (getinfo) | |
1374 | { | |
ed6116ce LW |
1375 | if (SvTHINKFIRST(astr)) { |
1376 | if (SvREADONLY(astr)) | |
1377 | croak("Can't %s to readonly var", op_name[optype]); | |
1378 | if (SvROK(astr)) | |
1379 | sv_unref(astr); | |
1380 | } | |
79072805 | 1381 | SvGROW(astr, infosize+1); |
463ee0b2 | 1382 | a = SvPV(astr, na); |
c2ab57d4 LW |
1383 | } |
1384 | else | |
1385 | { | |
463ee0b2 LW |
1386 | STRLEN len; |
1387 | a = SvPV(astr, len); | |
1388 | if (len != infosize) | |
1389 | croak("Bad arg length for %s, is %d, should be %d", | |
1390 | op_name[optype], len, infosize); | |
c2ab57d4 LW |
1391 | } |
1392 | } | |
1393 | else | |
1394 | { | |
463ee0b2 | 1395 | I32 i = SvIV(astr); |
c2ab57d4 LW |
1396 | a = (char *)i; /* ouch */ |
1397 | } | |
1398 | errno = 0; | |
1399 | switch (optype) | |
1400 | { | |
fe14fcc3 | 1401 | #ifdef HAS_MSG |
79072805 | 1402 | case OP_MSGCTL: |
bee1dbe2 | 1403 | ret = msgctl(id, cmd, (struct msqid_ds *)a); |
c2ab57d4 | 1404 | break; |
e5d73d77 | 1405 | #endif |
fe14fcc3 | 1406 | #ifdef HAS_SEM |
79072805 LW |
1407 | case OP_SEMCTL: |
1408 | ret = semctl(id, n, cmd, (struct semid_ds *)a); | |
c2ab57d4 | 1409 | break; |
e5d73d77 | 1410 | #endif |
fe14fcc3 | 1411 | #ifdef HAS_SHM |
79072805 | 1412 | case OP_SHMCTL: |
bee1dbe2 | 1413 | ret = shmctl(id, cmd, (struct shmid_ds *)a); |
c2ab57d4 | 1414 | break; |
e5d73d77 | 1415 | #endif |
c2ab57d4 LW |
1416 | } |
1417 | if (getinfo && ret >= 0) { | |
79072805 LW |
1418 | SvCUR_set(astr, infosize); |
1419 | *SvEND(astr) = '\0'; | |
c2ab57d4 LW |
1420 | } |
1421 | return ret; | |
1422 | } | |
1423 | ||
79072805 LW |
1424 | I32 |
1425 | do_msgsnd(mark, sp) | |
1426 | SV **mark; | |
1427 | SV **sp; | |
c2ab57d4 | 1428 | { |
fe14fcc3 | 1429 | #ifdef HAS_MSG |
79072805 | 1430 | SV *mstr; |
c2ab57d4 | 1431 | char *mbuf; |
79072805 | 1432 | I32 id, msize, flags; |
463ee0b2 | 1433 | STRLEN len; |
c2ab57d4 | 1434 | |
463ee0b2 | 1435 | id = SvIVx(*++mark); |
79072805 | 1436 | mstr = *++mark; |
463ee0b2 LW |
1437 | flags = SvIVx(*++mark); |
1438 | mbuf = SvPV(mstr, len); | |
1439 | if ((msize = len - sizeof(long)) < 0) | |
1440 | croak("Arg too short for msgsnd"); | |
c2ab57d4 | 1441 | errno = 0; |
bee1dbe2 | 1442 | return msgsnd(id, (struct msgbuf *)mbuf, msize, flags); |
e5d73d77 | 1443 | #else |
463ee0b2 | 1444 | croak("msgsnd not implemented"); |
e5d73d77 | 1445 | #endif |
c2ab57d4 LW |
1446 | } |
1447 | ||
79072805 LW |
1448 | I32 |
1449 | do_msgrcv(mark, sp) | |
1450 | SV **mark; | |
1451 | SV **sp; | |
c2ab57d4 | 1452 | { |
fe14fcc3 | 1453 | #ifdef HAS_MSG |
79072805 | 1454 | SV *mstr; |
c2ab57d4 LW |
1455 | char *mbuf; |
1456 | long mtype; | |
79072805 | 1457 | I32 id, msize, flags, ret; |
463ee0b2 | 1458 | STRLEN len; |
79072805 | 1459 | |
463ee0b2 | 1460 | id = SvIVx(*++mark); |
79072805 | 1461 | mstr = *++mark; |
463ee0b2 LW |
1462 | msize = SvIVx(*++mark); |
1463 | mtype = (long)SvIVx(*++mark); | |
1464 | flags = SvIVx(*++mark); | |
ed6116ce LW |
1465 | if (SvTHINKFIRST(mstr)) { |
1466 | if (SvREADONLY(mstr)) | |
1467 | croak("Can't msgrcv to readonly var"); | |
1468 | if (SvROK(mstr)) | |
1469 | sv_unref(mstr); | |
1470 | } | |
463ee0b2 LW |
1471 | mbuf = SvPV(mstr, len); |
1472 | if (len < sizeof(long)+msize+1) { | |
79072805 | 1473 | SvGROW(mstr, sizeof(long)+msize+1); |
463ee0b2 | 1474 | mbuf = SvPV(mstr, len); |
c2ab57d4 LW |
1475 | } |
1476 | errno = 0; | |
bee1dbe2 | 1477 | ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags); |
c2ab57d4 | 1478 | if (ret >= 0) { |
79072805 LW |
1479 | SvCUR_set(mstr, sizeof(long)+ret); |
1480 | *SvEND(mstr) = '\0'; | |
c2ab57d4 LW |
1481 | } |
1482 | return ret; | |
e5d73d77 | 1483 | #else |
463ee0b2 | 1484 | croak("msgrcv not implemented"); |
e5d73d77 | 1485 | #endif |
c2ab57d4 LW |
1486 | } |
1487 | ||
79072805 LW |
1488 | I32 |
1489 | do_semop(mark, sp) | |
1490 | SV **mark; | |
1491 | SV **sp; | |
c2ab57d4 | 1492 | { |
fe14fcc3 | 1493 | #ifdef HAS_SEM |
79072805 | 1494 | SV *opstr; |
c2ab57d4 | 1495 | char *opbuf; |
463ee0b2 LW |
1496 | I32 id; |
1497 | STRLEN opsize; | |
c2ab57d4 | 1498 | |
463ee0b2 | 1499 | id = SvIVx(*++mark); |
79072805 | 1500 | opstr = *++mark; |
463ee0b2 | 1501 | opbuf = SvPV(opstr, opsize); |
c2ab57d4 LW |
1502 | if (opsize < sizeof(struct sembuf) |
1503 | || (opsize % sizeof(struct sembuf)) != 0) { | |
1504 | errno = EINVAL; | |
1505 | return -1; | |
1506 | } | |
1507 | errno = 0; | |
6e21c824 | 1508 | return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf)); |
e5d73d77 | 1509 | #else |
463ee0b2 | 1510 | croak("semop not implemented"); |
e5d73d77 | 1511 | #endif |
c2ab57d4 LW |
1512 | } |
1513 | ||
79072805 LW |
1514 | I32 |
1515 | do_shmio(optype, mark, sp) | |
1516 | I32 optype; | |
1517 | SV **mark; | |
1518 | SV **sp; | |
c2ab57d4 | 1519 | { |
fe14fcc3 | 1520 | #ifdef HAS_SHM |
79072805 | 1521 | SV *mstr; |
c2ab57d4 | 1522 | char *mbuf, *shm; |
79072805 | 1523 | I32 id, mpos, msize; |
463ee0b2 | 1524 | STRLEN len; |
c2ab57d4 | 1525 | struct shmid_ds shmds; |
6e21c824 | 1526 | #ifndef VOIDSHMAT |
85e6fe83 | 1527 | extern char *shmat P((int, char *, int)); |
6e21c824 | 1528 | #endif |
c2ab57d4 | 1529 | |
463ee0b2 | 1530 | id = SvIVx(*++mark); |
79072805 | 1531 | mstr = *++mark; |
463ee0b2 LW |
1532 | mpos = SvIVx(*++mark); |
1533 | msize = SvIVx(*++mark); | |
c2ab57d4 LW |
1534 | errno = 0; |
1535 | if (shmctl(id, IPC_STAT, &shmds) == -1) | |
1536 | return -1; | |
1537 | if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) { | |
1538 | errno = EFAULT; /* can't do as caller requested */ | |
1539 | return -1; | |
1540 | } | |
79072805 | 1541 | shm = (char*)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0); |
c2ab57d4 LW |
1542 | if (shm == (char *)-1) /* I hate System V IPC, I really do */ |
1543 | return -1; | |
463ee0b2 | 1544 | mbuf = SvPV(mstr, len); |
79072805 | 1545 | if (optype == OP_SHMREAD) { |
ed6116ce LW |
1546 | if (SvTHINKFIRST(mstr)) { |
1547 | if (SvREADONLY(mstr)) | |
1548 | croak("Can't shmread to readonly var"); | |
1549 | if (SvROK(mstr)) | |
1550 | sv_unref(mstr); | |
1551 | } | |
463ee0b2 | 1552 | if (len < msize) { |
79072805 | 1553 | SvGROW(mstr, msize+1); |
463ee0b2 | 1554 | mbuf = SvPV(mstr, len); |
c2ab57d4 | 1555 | } |
bee1dbe2 | 1556 | Copy(shm + mpos, mbuf, msize, char); |
79072805 LW |
1557 | SvCUR_set(mstr, msize); |
1558 | *SvEND(mstr) = '\0'; | |
c2ab57d4 LW |
1559 | } |
1560 | else { | |
79072805 | 1561 | I32 n; |
c2ab57d4 | 1562 | |
463ee0b2 | 1563 | if ((n = len) > msize) |
c2ab57d4 | 1564 | n = msize; |
bee1dbe2 | 1565 | Copy(mbuf, shm + mpos, n, char); |
c2ab57d4 | 1566 | if (n < msize) |
bee1dbe2 | 1567 | memzero(shm + mpos + n, msize - n); |
c2ab57d4 LW |
1568 | } |
1569 | return shmdt(shm); | |
e5d73d77 | 1570 | #else |
463ee0b2 | 1571 | croak("shm I/O not implemented"); |
e5d73d77 | 1572 | #endif |
c2ab57d4 LW |
1573 | } |
1574 | ||
fe14fcc3 | 1575 | #endif /* SYSV IPC */ |