| 1 | # include <stdio.h> |
| 2 | # include <sys/types.h> |
| 3 | # include <sys/stat.h> |
| 4 | # include <sys/dir.h> |
| 5 | # include <errno.h> |
| 6 | # include <signal.h> |
| 7 | # include <sysexits.h> |
| 8 | # include <whoami.h> |
| 9 | # include <pwd.h> |
| 10 | |
| 11 | /* |
| 12 | ** SCCS.C -- human-oriented front end to the SCCS system. |
| 13 | ** |
| 14 | ** Without trying to add any functionality to speak of, this |
| 15 | ** program tries to make SCCS a little more accessible to human |
| 16 | ** types. The main thing it does is automatically put the |
| 17 | ** string "SCCS/s." on the front of names. Also, it has a |
| 18 | ** couple of things that are designed to shorten frequent |
| 19 | ** combinations, e.g., "delget" which expands to a "delta" |
| 20 | ** and a "get". |
| 21 | ** |
| 22 | ** This program can also function as a setuid front end. |
| 23 | ** To do this, you should copy the source, renaming it to |
| 24 | ** whatever you want, e.g., "syssccs". Change any defaults |
| 25 | ** in the program (e.g., syssccs might default -d to |
| 26 | ** "/usr/src/sys"). Then recompile and put the result |
| 27 | ** as setuid to whomever you want. In this mode, sccs |
| 28 | ** knows to not run setuid for certain programs in order |
| 29 | ** to preserve security, and so forth. |
| 30 | ** |
| 31 | ** Usage: |
| 32 | ** sccs [flags] command [args] |
| 33 | ** |
| 34 | ** Flags: |
| 35 | ** -d<dir> <dir> represents a directory to search |
| 36 | ** out of. It should be a full pathname |
| 37 | ** for general usage. E.g., if <dir> is |
| 38 | ** "/usr/src/sys", then a reference to the |
| 39 | ** file "dev/bio.c" becomes a reference to |
| 40 | ** "/usr/src/sys/dev/bio.c". |
| 41 | ** -p<path> prepends <path> to the final component |
| 42 | ** of the pathname. By default, this is |
| 43 | ** "SCCS". For example, in the -d example |
| 44 | ** above, the path then gets modified to |
| 45 | ** "/usr/src/sys/dev/SCCS/s.bio.c". In |
| 46 | ** more common usage (without the -d flag), |
| 47 | ** "prog.c" would get modified to |
| 48 | ** "SCCS/s.prog.c". In both cases, the |
| 49 | ** "s." gets automatically prepended. |
| 50 | ** -r run as the real user. |
| 51 | ** |
| 52 | ** Commands: |
| 53 | ** admin, |
| 54 | ** get, |
| 55 | ** delta, |
| 56 | ** rmdel, |
| 57 | ** chghist, |
| 58 | ** etc. Straight out of SCCS; only difference |
| 59 | ** is that pathnames get modified as |
| 60 | ** described above. |
| 61 | ** edit Macro for "get -e". |
| 62 | ** unedit Removes a file being edited, knowing |
| 63 | ** about p-files, etc. |
| 64 | ** delget Macro for "delta" followed by "get". |
| 65 | ** deledit Macro for "delta" followed by "get -e". |
| 66 | ** info Tell what files being edited. |
| 67 | ** clean Remove all files that can be |
| 68 | ** regenerated from SCCS files. |
| 69 | ** check Like info, but return exit status, for |
| 70 | ** use in makefiles. |
| 71 | ** fix Remove a top delta & reedit, but save |
| 72 | ** the previous changes in that delta. |
| 73 | ** |
| 74 | ** Compilation Flags: |
| 75 | ** UIDUSER -- determine who the user is by looking at the |
| 76 | ** uid rather than the login name -- for machines |
| 77 | ** where SCCS gets the user in this way. |
| 78 | ** SCCSDIR -- if defined, forces the -d flag to take on |
| 79 | ** this value. This is so that the setuid |
| 80 | ** aspects of this program cannot be abused. |
| 81 | ** This flag also disables the -p flag. |
| 82 | ** SCCSPATH -- the default for the -p flag. |
| 83 | ** MYNAME -- the title this program should print when it |
| 84 | ** gives error messages. |
| 85 | ** |
| 86 | ** Compilation Instructions: |
| 87 | ** cc -O -n -s sccs.c |
| 88 | ** The flags listed above can be -D defined to simplify |
| 89 | ** recompilation for variant versions. |
| 90 | ** |
| 91 | ** Author: |
| 92 | ** Eric Allman, UCB/INGRES |
| 93 | ** Copyright 1980 Regents of the University of California |
| 94 | */ |
| 95 | |
| 96 | static char SccsId[] = "@(#)sccs.c 1.58 %G%"; |
| 97 | \f |
| 98 | /******************* Configuration Information ********************/ |
| 99 | |
| 100 | /* special defines for local berkeley systems */ |
| 101 | # include <whoami.h> |
| 102 | |
| 103 | # ifdef CSVAX |
| 104 | # define UIDUSER |
| 105 | # define PROGPATH(name) "/usr/local/name" |
| 106 | # endif CSVAX |
| 107 | |
| 108 | # ifdef INGVAX |
| 109 | # define PROGPATH(name) "/usr/local/name" |
| 110 | # endif INGVAX |
| 111 | |
| 112 | # ifdef CORY |
| 113 | # define PROGPATH(name) "/usr/eecs/bin/name" |
| 114 | # endif CORY |
| 115 | |
| 116 | /* end of berkeley systems defines */ |
| 117 | |
| 118 | # ifndef SCCSPATH |
| 119 | # define SCCSPATH "SCCS" /* pathname in which to find s-files */ |
| 120 | # endif NOT SCCSPATH |
| 121 | |
| 122 | # ifndef MYNAME |
| 123 | # define MYNAME "sccs" /* name used for printing errors */ |
| 124 | # endif NOT MYNAME |
| 125 | |
| 126 | # ifndef PROGPATH |
| 127 | # define PROGPATH(name) "/usr/sccs/name" /* place to find binaries */ |
| 128 | # endif PROGPATH |
| 129 | |
| 130 | /**************** End of Configuration Information ****************/ |
| 131 | \f |
| 132 | typedef char bool; |
| 133 | # define TRUE 1 |
| 134 | # define FALSE 0 |
| 135 | |
| 136 | # define bitset(bit, word) ((bool) ((bit) & (word))) |
| 137 | |
| 138 | struct sccsprog |
| 139 | { |
| 140 | char *sccsname; /* name of SCCS routine */ |
| 141 | short sccsoper; /* opcode, see below */ |
| 142 | short sccsflags; /* flags, see below */ |
| 143 | char *sccspath; /* pathname of binary implementing */ |
| 144 | }; |
| 145 | |
| 146 | /* values for sccsoper */ |
| 147 | # define PROG 0 /* call a program */ |
| 148 | # define CMACRO 1 /* command substitution macro */ |
| 149 | # define FIX 2 /* fix a delta */ |
| 150 | # define CLEAN 3 /* clean out recreatable files */ |
| 151 | # define UNEDIT 4 /* unedit a file */ |
| 152 | # define SHELL 5 /* call a shell file (like PROG) */ |
| 153 | # define DIFFS 6 /* diff between sccs & file out */ |
| 154 | # define DODIFF 7 /* internal call to diff program */ |
| 155 | |
| 156 | /* bits for sccsflags */ |
| 157 | # define NO_SDOT 0001 /* no s. on front of args */ |
| 158 | # define REALUSER 0002 /* protected (e.g., admin) */ |
| 159 | |
| 160 | /* modes for the "clean", "info", "check" ops */ |
| 161 | # define CLEANC 0 /* clean command */ |
| 162 | # define INFOC 1 /* info command */ |
| 163 | # define CHECKC 2 /* check command */ |
| 164 | # define TELLC 3 /* give list of files being edited */ |
| 165 | |
| 166 | /* |
| 167 | ** Description of commands known to this program. |
| 168 | ** First argument puts the command into a class. Second arg is |
| 169 | ** info regarding treatment of this command. Third arg is a |
| 170 | ** list of flags this command accepts from macros, etc. Fourth |
| 171 | ** arg is the pathname of the implementing program, or the |
| 172 | ** macro definition, or the arg to a sub-algorithm. |
| 173 | */ |
| 174 | |
| 175 | struct sccsprog SccsProg[] = |
| 176 | { |
| 177 | "admin", PROG, REALUSER, PROGPATH(admin), |
| 178 | "chghist", PROG, 0, PROGPATH(rmdel), |
| 179 | "comb", PROG, 0, PROGPATH(comb), |
| 180 | "delta", PROG, 0, PROGPATH(delta), |
| 181 | "get", PROG, 0, PROGPATH(get), |
| 182 | "help", PROG, NO_SDOT, PROGPATH(help), |
| 183 | "prs", PROG, 0, PROGPATH(prs), |
| 184 | "prt", PROG, 0, PROGPATH(prt), |
| 185 | "rmdel", PROG, REALUSER, PROGPATH(rmdel), |
| 186 | "val", PROG, 0, PROGPATH(val), |
| 187 | "what", PROG, NO_SDOT, PROGPATH(what), |
| 188 | "sccsdiff", SHELL, REALUSER, PROGPATH(sccsdiff), |
| 189 | "edit", CMACRO, NO_SDOT, "get -e", |
| 190 | "delget", CMACRO, NO_SDOT, "delta:mysrp/get:ixbeskcl -t", |
| 191 | "deledit", CMACRO, NO_SDOT, "delta:mysrp -n/get:ixbskcl -e -t -g", |
| 192 | "fix", FIX, NO_SDOT, NULL, |
| 193 | "clean", CLEAN, REALUSER|NO_SDOT, (char *) CLEANC, |
| 194 | "info", CLEAN, REALUSER|NO_SDOT, (char *) INFOC, |
| 195 | "check", CLEAN, REALUSER|NO_SDOT, (char *) CHECKC, |
| 196 | "tell", CLEAN, REALUSER|NO_SDOT, (char *) TELLC, |
| 197 | "unedit", UNEDIT, NO_SDOT, NULL, |
| 198 | "diffs", DIFFS, NO_SDOT|REALUSER, NULL, |
| 199 | "-diff", DODIFF, NO_SDOT|REALUSER, PROGPATH(bdiff), |
| 200 | "print", CMACRO, 0, "prt -e/get -p -m -s", |
| 201 | NULL, -1, 0, NULL |
| 202 | }; |
| 203 | |
| 204 | /* one line from a p-file */ |
| 205 | struct pfile |
| 206 | { |
| 207 | char *p_osid; /* old SID */ |
| 208 | char *p_nsid; /* new SID */ |
| 209 | char *p_user; /* user who did edit */ |
| 210 | char *p_date; /* date of get */ |
| 211 | char *p_time; /* time of get */ |
| 212 | }; |
| 213 | |
| 214 | char *SccsPath = SCCSPATH; /* pathname of SCCS files */ |
| 215 | # ifdef SCCSDIR |
| 216 | char *SccsDir = SCCSDIR; /* directory to begin search from */ |
| 217 | # else |
| 218 | char *SccsDir = ""; |
| 219 | # endif |
| 220 | char MyName[] = MYNAME; /* name used in messages */ |
| 221 | int OutFile = -1; /* override output file for commands */ |
| 222 | bool RealUser; /* if set, running as real user */ |
| 223 | # ifdef DEBUG |
| 224 | bool Debug; /* turn on tracing */ |
| 225 | # endif |
| 226 | # ifndef V6 |
| 227 | extern char *getenv(); |
| 228 | # endif V6 |
| 229 | \f |
| 230 | main(argc, argv) |
| 231 | int argc; |
| 232 | char **argv; |
| 233 | { |
| 234 | register char *p; |
| 235 | extern struct sccsprog *lookup(); |
| 236 | register int i; |
| 237 | # ifndef V6 |
| 238 | # ifndef SCCSDIR |
| 239 | register struct passwd *pw; |
| 240 | extern struct passwd *getpwnam(); |
| 241 | char buf[100]; |
| 242 | |
| 243 | /* pull "SccsDir" out of the environment (possibly) */ |
| 244 | p = getenv("PROJECT"); |
| 245 | if (p != NULL && p[0] != '\0') |
| 246 | { |
| 247 | if (p[0] == '/') |
| 248 | SccsDir = p; |
| 249 | else |
| 250 | { |
| 251 | pw = getpwnam(p); |
| 252 | if (pw == NULL) |
| 253 | { |
| 254 | usrerr("user %s does not exist", p); |
| 255 | exit(EX_USAGE); |
| 256 | } |
| 257 | strcpy(buf, pw->pw_dir); |
| 258 | strcat(buf, "/src"); |
| 259 | if (access(buf, 0) < 0) |
| 260 | { |
| 261 | strcpy(buf, pw->pw_dir); |
| 262 | strcat(buf, "/source"); |
| 263 | if (access(buf, 0) < 0) |
| 264 | { |
| 265 | usrerr("project %s has no source!", p); |
| 266 | exit(EX_USAGE); |
| 267 | } |
| 268 | } |
| 269 | SccsDir = buf; |
| 270 | } |
| 271 | } |
| 272 | # endif SCCSDIR |
| 273 | # endif V6 |
| 274 | |
| 275 | /* |
| 276 | ** Detect and decode flags intended for this program. |
| 277 | */ |
| 278 | |
| 279 | if (argc < 2) |
| 280 | { |
| 281 | fprintf(stderr, "Usage: %s [flags] command [flags]\n", MyName); |
| 282 | exit(EX_USAGE); |
| 283 | } |
| 284 | argv[argc] = NULL; |
| 285 | |
| 286 | if (lookup(argv[0]) == NULL) |
| 287 | { |
| 288 | while ((p = *++argv) != NULL) |
| 289 | { |
| 290 | if (*p != '-') |
| 291 | break; |
| 292 | switch (*++p) |
| 293 | { |
| 294 | case 'r': /* run as real user */ |
| 295 | setuid(getuid()); |
| 296 | RealUser++; |
| 297 | break; |
| 298 | |
| 299 | # ifndef SCCSDIR |
| 300 | case 'p': /* path of sccs files */ |
| 301 | SccsPath = ++p; |
| 302 | break; |
| 303 | |
| 304 | case 'd': /* directory to search from */ |
| 305 | SccsDir = ++p; |
| 306 | break; |
| 307 | # endif |
| 308 | |
| 309 | # ifdef DEBUG |
| 310 | case 'T': /* trace */ |
| 311 | Debug++; |
| 312 | break; |
| 313 | # endif |
| 314 | |
| 315 | default: |
| 316 | usrerr("unknown option -%s", p); |
| 317 | break; |
| 318 | } |
| 319 | } |
| 320 | if (SccsPath[0] == '\0') |
| 321 | SccsPath = "."; |
| 322 | } |
| 323 | |
| 324 | i = command(argv, FALSE, ""); |
| 325 | exit(i); |
| 326 | } |
| 327 | \f |
| 328 | /* |
| 329 | ** COMMAND -- look up and perform a command |
| 330 | ** |
| 331 | ** This routine is the guts of this program. Given an |
| 332 | ** argument vector, it looks up the "command" (argv[0]) |
| 333 | ** in the configuration table and does the necessary stuff. |
| 334 | ** |
| 335 | ** Parameters: |
| 336 | ** argv -- an argument vector to process. |
| 337 | ** forkflag -- if set, fork before executing the command. |
| 338 | ** editflag -- if set, only include flags listed in the |
| 339 | ** sccsklets field of the command descriptor. |
| 340 | ** arg0 -- a space-seperated list of arguments to insert |
| 341 | ** before argv. |
| 342 | ** |
| 343 | ** Returns: |
| 344 | ** zero -- command executed ok. |
| 345 | ** else -- error status. |
| 346 | ** |
| 347 | ** Side Effects: |
| 348 | ** none. |
| 349 | */ |
| 350 | |
| 351 | command(argv, forkflag, arg0) |
| 352 | char **argv; |
| 353 | bool forkflag; |
| 354 | char *arg0; |
| 355 | { |
| 356 | register struct sccsprog *cmd; |
| 357 | register char *p; |
| 358 | char buf[40]; |
| 359 | extern struct sccsprog *lookup(); |
| 360 | char *nav[1000]; |
| 361 | char **np; |
| 362 | register char **ap; |
| 363 | register int i; |
| 364 | register char *q; |
| 365 | extern bool unedit(); |
| 366 | int rval = 0; |
| 367 | extern char *index(); |
| 368 | extern char *makefile(); |
| 369 | char *editchs; |
| 370 | extern char *tail(); |
| 371 | |
| 372 | # ifdef DEBUG |
| 373 | if (Debug) |
| 374 | { |
| 375 | printf("command:\n\t\"%s\"\n", arg0); |
| 376 | for (np = argv; *np != NULL; np++) |
| 377 | printf("\t\"%s\"\n", *np); |
| 378 | } |
| 379 | # endif |
| 380 | |
| 381 | /* |
| 382 | ** Copy arguments. |
| 383 | ** Copy from arg0 & if necessary at most one arg |
| 384 | ** from argv[0]. |
| 385 | */ |
| 386 | |
| 387 | np = ap = &nav[1]; |
| 388 | editchs = NULL; |
| 389 | for (p = arg0, q = buf; *p != '\0' && *p != '/'; ) |
| 390 | { |
| 391 | *np++ = q; |
| 392 | while (*p == ' ') |
| 393 | p++; |
| 394 | while (*p != ' ' && *p != '\0' && *p != '/' && *p != ':') |
| 395 | *q++ = *p++; |
| 396 | *q++ = '\0'; |
| 397 | if (*p == ':') |
| 398 | { |
| 399 | editchs = q; |
| 400 | while (*++p != '\0' && *p != '/' && *p != ' ') |
| 401 | *q++ = *p; |
| 402 | *q++ = '\0'; |
| 403 | } |
| 404 | } |
| 405 | *np = NULL; |
| 406 | if (*ap == NULL) |
| 407 | *np++ = *argv++; |
| 408 | |
| 409 | /* |
| 410 | ** Look up command. |
| 411 | ** At this point, *ap is the command name. |
| 412 | */ |
| 413 | |
| 414 | cmd = lookup(*ap); |
| 415 | if (cmd == NULL) |
| 416 | { |
| 417 | usrerr("Unknown command \"%s\"", *ap); |
| 418 | return (EX_USAGE); |
| 419 | } |
| 420 | |
| 421 | /* |
| 422 | ** Copy remaining arguments doing editing as appropriate. |
| 423 | */ |
| 424 | |
| 425 | for (; *argv != NULL; argv++) |
| 426 | { |
| 427 | p = *argv; |
| 428 | if (*p == '-') |
| 429 | { |
| 430 | if (p[1] == '\0' || editchs == NULL || index(editchs, p[1]) != NULL) |
| 431 | *np++ = p; |
| 432 | } |
| 433 | else |
| 434 | { |
| 435 | if (!bitset(NO_SDOT, cmd->sccsflags)) |
| 436 | p = makefile(p); |
| 437 | if (p != NULL) |
| 438 | *np++ = p; |
| 439 | } |
| 440 | } |
| 441 | *np = NULL; |
| 442 | |
| 443 | /* |
| 444 | ** Interpret operation associated with this command. |
| 445 | */ |
| 446 | |
| 447 | switch (cmd->sccsoper) |
| 448 | { |
| 449 | case SHELL: /* call a shell file */ |
| 450 | *ap = cmd->sccspath; |
| 451 | *--ap = "sh"; |
| 452 | rval = callprog("/bin/sh", cmd->sccsflags, ap, forkflag); |
| 453 | break; |
| 454 | |
| 455 | case PROG: /* call an sccs prog */ |
| 456 | rval = callprog(cmd->sccspath, cmd->sccsflags, ap, forkflag); |
| 457 | break; |
| 458 | |
| 459 | case CMACRO: /* command macro */ |
| 460 | /* step through & execute each part of the macro */ |
| 461 | for (p = cmd->sccspath; *p != '\0'; p++) |
| 462 | { |
| 463 | q = p; |
| 464 | while (*p != '\0' && *p != '/') |
| 465 | p++; |
| 466 | rval = command(&ap[1], *p != '\0', q); |
| 467 | if (rval != 0) |
| 468 | break; |
| 469 | } |
| 470 | break; |
| 471 | |
| 472 | case FIX: /* fix a delta */ |
| 473 | if (strncmp(ap[1], "-r", 2) != 0) |
| 474 | { |
| 475 | usrerr("-r flag needed for fix command"); |
| 476 | rval = EX_USAGE; |
| 477 | break; |
| 478 | } |
| 479 | |
| 480 | /* get the version with all changes */ |
| 481 | rval = command(&ap[1], TRUE, "get -k"); |
| 482 | |
| 483 | /* now remove that version from the s-file */ |
| 484 | if (rval == 0) |
| 485 | rval = command(&ap[1], TRUE, "rmdel:r"); |
| 486 | |
| 487 | /* and edit the old version (but don't clobber new vers) */ |
| 488 | if (rval == 0) |
| 489 | rval = command(&ap[2], FALSE, "get -e -g"); |
| 490 | break; |
| 491 | |
| 492 | case CLEAN: |
| 493 | rval = clean((int) cmd->sccspath, ap); |
| 494 | break; |
| 495 | |
| 496 | case UNEDIT: |
| 497 | for (argv = np = &ap[1]; *argv != NULL; argv++) |
| 498 | { |
| 499 | if (unedit(*argv)) |
| 500 | *np++ = *argv; |
| 501 | } |
| 502 | *np = NULL; |
| 503 | |
| 504 | /* get all the files that we unedited successfully */ |
| 505 | if (np > &ap[1]) |
| 506 | rval = command(&ap[1], FALSE, "get"); |
| 507 | break; |
| 508 | |
| 509 | case DIFFS: /* diff between s-file & edit file */ |
| 510 | /* find the end of the flag arguments */ |
| 511 | for (np = &ap[1]; *np != NULL && **np == '-'; np++) |
| 512 | continue; |
| 513 | argv = np; |
| 514 | |
| 515 | /* for each file, do the diff */ |
| 516 | p = argv[1]; |
| 517 | while (*np != NULL) |
| 518 | { |
| 519 | /* messy, but we need a null terminated argv */ |
| 520 | *argv = *np++; |
| 521 | argv[1] = NULL; |
| 522 | i = dodiff(ap, tail(*argv)); |
| 523 | if (rval == 0) |
| 524 | rval = i; |
| 525 | argv[1] = p; |
| 526 | } |
| 527 | break; |
| 528 | |
| 529 | case DODIFF: /* internal diff call */ |
| 530 | setuid(getuid()); |
| 531 | for (np = ap; *np != NULL; np++) |
| 532 | { |
| 533 | if ((*np)[0] == '-' && (*np)[1] == 'C') |
| 534 | (*np)[1] = 'c'; |
| 535 | } |
| 536 | |
| 537 | /* insert "-" argument */ |
| 538 | np[1] = NULL; |
| 539 | np[0] = np[-1]; |
| 540 | np[-1] = "-"; |
| 541 | |
| 542 | /* execute the diff program of choice */ |
| 543 | # ifndef V6 |
| 544 | execvp("diff", ap); |
| 545 | # endif |
| 546 | execv(cmd->sccspath, argv); |
| 547 | syserr("cannot exec %s", cmd->sccspath); |
| 548 | exit(EX_OSERR); |
| 549 | |
| 550 | default: |
| 551 | syserr("oper %d", cmd->sccsoper); |
| 552 | exit(EX_SOFTWARE); |
| 553 | } |
| 554 | # ifdef DEBUG |
| 555 | if (Debug) |
| 556 | printf("command: rval=%d\n", rval); |
| 557 | # endif |
| 558 | return (rval); |
| 559 | } |
| 560 | \f |
| 561 | /* |
| 562 | ** LOOKUP -- look up an SCCS command name. |
| 563 | ** |
| 564 | ** Parameters: |
| 565 | ** name -- the name of the command to look up. |
| 566 | ** |
| 567 | ** Returns: |
| 568 | ** ptr to command descriptor for this command. |
| 569 | ** NULL if no such entry. |
| 570 | ** |
| 571 | ** Side Effects: |
| 572 | ** none. |
| 573 | */ |
| 574 | |
| 575 | struct sccsprog * |
| 576 | lookup(name) |
| 577 | char *name; |
| 578 | { |
| 579 | register struct sccsprog *cmd; |
| 580 | |
| 581 | for (cmd = SccsProg; cmd->sccsname != NULL; cmd++) |
| 582 | { |
| 583 | if (strcmp(cmd->sccsname, name) == 0) |
| 584 | return (cmd); |
| 585 | } |
| 586 | return (NULL); |
| 587 | } |
| 588 | \f |
| 589 | /* |
| 590 | ** CALLPROG -- call a program |
| 591 | ** |
| 592 | ** Used to call the SCCS programs. |
| 593 | ** |
| 594 | ** Parameters: |
| 595 | ** progpath -- pathname of the program to call. |
| 596 | ** flags -- status flags from the command descriptors. |
| 597 | ** argv -- an argument vector to pass to the program. |
| 598 | ** forkflag -- if true, fork before calling, else just |
| 599 | ** exec. |
| 600 | ** |
| 601 | ** Returns: |
| 602 | ** The exit status of the program. |
| 603 | ** Nothing if forkflag == FALSE. |
| 604 | ** |
| 605 | ** Side Effects: |
| 606 | ** Can exit if forkflag == FALSE. |
| 607 | */ |
| 608 | |
| 609 | callprog(progpath, flags, argv, forkflag) |
| 610 | char *progpath; |
| 611 | short flags; |
| 612 | char **argv; |
| 613 | bool forkflag; |
| 614 | { |
| 615 | register int i; |
| 616 | auto int st; |
| 617 | |
| 618 | # ifdef DEBUG |
| 619 | if (Debug) |
| 620 | { |
| 621 | printf("callprog:\n"); |
| 622 | for (i = 0; argv[i] != NULL; i++) |
| 623 | printf("\t\"%s\"\n", argv[i]); |
| 624 | } |
| 625 | # endif |
| 626 | |
| 627 | if (*argv == NULL) |
| 628 | return (-1); |
| 629 | |
| 630 | /* |
| 631 | ** Fork if appropriate. |
| 632 | */ |
| 633 | |
| 634 | if (forkflag) |
| 635 | { |
| 636 | # ifdef DEBUG |
| 637 | if (Debug) |
| 638 | printf("Forking\n"); |
| 639 | # endif |
| 640 | i = fork(); |
| 641 | if (i < 0) |
| 642 | { |
| 643 | syserr("cannot fork"); |
| 644 | exit(EX_OSERR); |
| 645 | } |
| 646 | else if (i > 0) |
| 647 | { |
| 648 | wait(&st); |
| 649 | if ((st & 0377) == 0) |
| 650 | st = (st >> 8) & 0377; |
| 651 | if (OutFile >= 0) |
| 652 | { |
| 653 | close(OutFile); |
| 654 | OutFile = -1; |
| 655 | } |
| 656 | return (st); |
| 657 | } |
| 658 | } |
| 659 | else if (OutFile >= 0) |
| 660 | { |
| 661 | syserr("callprog: setting stdout w/o forking"); |
| 662 | exit(EX_SOFTWARE); |
| 663 | } |
| 664 | |
| 665 | /* set protection as appropriate */ |
| 666 | if (bitset(REALUSER, flags)) |
| 667 | setuid(getuid()); |
| 668 | |
| 669 | /* change standard input & output if needed */ |
| 670 | if (OutFile >= 0) |
| 671 | { |
| 672 | close(1); |
| 673 | dup(OutFile); |
| 674 | close(OutFile); |
| 675 | } |
| 676 | |
| 677 | /* call real SCCS program */ |
| 678 | execv(progpath, argv); |
| 679 | syserr("cannot execute %s", progpath); |
| 680 | exit(EX_UNAVAILABLE); |
| 681 | /*NOTREACHED*/ |
| 682 | } |
| 683 | \f |
| 684 | /* |
| 685 | ** MAKEFILE -- make filename of SCCS file |
| 686 | ** |
| 687 | ** If the name passed is already the name of an SCCS file, |
| 688 | ** just return it. Otherwise, munge the name into the name |
| 689 | ** of the actual SCCS file. |
| 690 | ** |
| 691 | ** There are cases when it is not clear what you want to |
| 692 | ** do. For example, if SccsPath is an absolute pathname |
| 693 | ** and the name given is also an absolute pathname, we go |
| 694 | ** for SccsPath (& only use the last component of the name |
| 695 | ** passed) -- this is important for security reasons (if |
| 696 | ** sccs is being used as a setuid front end), but not |
| 697 | ** particularly intuitive. |
| 698 | ** |
| 699 | ** Parameters: |
| 700 | ** name -- the file name to be munged. |
| 701 | ** |
| 702 | ** Returns: |
| 703 | ** The pathname of the sccs file. |
| 704 | ** NULL on error. |
| 705 | ** |
| 706 | ** Side Effects: |
| 707 | ** none. |
| 708 | */ |
| 709 | |
| 710 | char * |
| 711 | makefile(name) |
| 712 | char *name; |
| 713 | { |
| 714 | register char *p; |
| 715 | char buf[512]; |
| 716 | extern char *malloc(); |
| 717 | extern char *rindex(); |
| 718 | extern bool isdir(); |
| 719 | register char *q; |
| 720 | |
| 721 | p = rindex(name, '/'); |
| 722 | if (p == NULL) |
| 723 | p = name; |
| 724 | else |
| 725 | p++; |
| 726 | |
| 727 | /* |
| 728 | ** See if the name can be used as-is. |
| 729 | */ |
| 730 | |
| 731 | if (SccsPath[0] != '/' || name[0] == '/' || strncmp(name, "./", 2) == 0) |
| 732 | { |
| 733 | if (strncmp(p, "s.", 2) == 0) |
| 734 | return (name); |
| 735 | if (isdir(name)) |
| 736 | return (name); |
| 737 | } |
| 738 | |
| 739 | /* |
| 740 | ** Create the actual pathname. |
| 741 | */ |
| 742 | |
| 743 | /* first the directory part */ |
| 744 | if (name[0] != '/') |
| 745 | { |
| 746 | strcpy(buf, SccsDir); |
| 747 | strcat(buf, "/"); |
| 748 | } |
| 749 | else |
| 750 | strcpy(buf, ""); |
| 751 | |
| 752 | /* then the head of the pathname */ |
| 753 | strncat(buf, name, p - name); |
| 754 | q = &buf[strlen(buf)]; |
| 755 | strcpy(q, p); |
| 756 | if (strncmp(p, "s.", 2) != 0 && !isdir(buf)) |
| 757 | { |
| 758 | /* sorry, no; copy the SCCS pathname & the "s." */ |
| 759 | strcpy(q, SccsPath); |
| 760 | strcat(buf, "/s."); |
| 761 | |
| 762 | /* and now the end of the name */ |
| 763 | strcat(buf, p); |
| 764 | } |
| 765 | |
| 766 | /* if i haven't changed it, why did I do all this? */ |
| 767 | if (strcmp(buf, name) == 0) |
| 768 | p = name; |
| 769 | |
| 770 | return (stat(name, &stbuf) >= 0 && (stbuf.st_mode & S_IFMT) == S_IFDIR); |
| 771 | } |
| 772 | \f/* |
| 773 | ** ISDIR -- return true if the argument is a directory. |
| 774 | ** |
| 775 | ** Parameters: |
| 776 | ** name -- the pathname of the file to check. |
| 777 | ** |
| 778 | ** Returns: |
| 779 | ** TRUE if 'name' is a directory, FALSE otherwise. |
| 780 | ** |
| 781 | ** Side Effects: |
| 782 | ** none. |
| 783 | */ |
| 784 | |
| 785 | bool |
| 786 | isdir(name) |
| 787 | char *name; |
| 788 | { |
| 789 | struct stat stbuf; |
| 790 | |
| 791 | return (stat(name, &stbuf) >= 0 && (stbuf.st_mode & S_IFMT) == S_IFDIR); |
| 792 | } |
| 793 | \f |
| 794 | /* |
| 795 | ** SAFEPATH -- determine whether a pathname is "safe" |
| 796 | ** |
| 797 | ** "Safe" pathnames only allow you to get deeper into the |
| 798 | ** directory structure, i.e., full pathnames and ".." are |
| 799 | ** not allowed. |
| 800 | ** |
| 801 | ** Parameters: |
| 802 | ** p -- the name to check. |
| 803 | ** |
| 804 | ** Returns: |
| 805 | ** TRUE -- if the path is safe. |
| 806 | ** FALSE -- if the path is not safe. |
| 807 | ** |
| 808 | ** Side Effects: |
| 809 | ** Prints a message if the path is not safe. |
| 810 | */ |
| 811 | |
| 812 | bool |
| 813 | safepath(p) |
| 814 | register char *p; |
| 815 | { |
| 816 | extern char *index(); |
| 817 | |
| 818 | if (*p != '/') |
| 819 | { |
| 820 | while (strncmp(p, "../", 3) != 0 && strcmp(p, "..") != 0) |
| 821 | { |
| 822 | p = index(p, '/'); |
| 823 | if (p == NULL) |
| 824 | return (TRUE); |
| 825 | p++; |
| 826 | } |
| 827 | } |
| 828 | |
| 829 | printf("You may not use full pathnames or \"..\"\n"); |
| 830 | return (FALSE); |
| 831 | } |
| 832 | \f |
| 833 | /* |
| 834 | ** CLEAN -- clean out recreatable files |
| 835 | ** |
| 836 | ** Any file for which an "s." file exists but no "p." file |
| 837 | ** exists in the current directory is purged. |
| 838 | ** |
| 839 | ** Parameters: |
| 840 | ** mode -- tells whether this came from a "clean", "info", or |
| 841 | ** "check" command. |
| 842 | ** argv -- the rest of the argument vector. |
| 843 | ** |
| 844 | ** Returns: |
| 845 | ** none. |
| 846 | ** |
| 847 | ** Side Effects: |
| 848 | ** Removes files in the current directory. |
| 849 | ** Prints information regarding files being edited. |
| 850 | ** Exits if a "check" command. |
| 851 | */ |
| 852 | |
| 853 | clean(mode, argv) |
| 854 | int mode; |
| 855 | char **argv; |
| 856 | { |
| 857 | struct direct dir; |
| 858 | char buf[100]; |
| 859 | char *bufend; |
| 860 | register FILE *dirfd; |
| 861 | register char *basefile; |
| 862 | bool gotedit; |
| 863 | bool gotpfent; |
| 864 | FILE *pfp; |
| 865 | bool nobranch = FALSE; |
| 866 | extern struct pfile *getpfent(); |
| 867 | register struct pfile *pf; |
| 868 | register char **ap; |
| 869 | extern char *username(); |
| 870 | char *usernm = NULL; |
| 871 | char *subdir = NULL; |
| 872 | char *cmdname; |
| 873 | |
| 874 | /* |
| 875 | ** Process the argv |
| 876 | */ |
| 877 | |
| 878 | cmdname = *argv; |
| 879 | for (ap = argv; *++ap != NULL; ) |
| 880 | { |
| 881 | if (**ap == '-') |
| 882 | { |
| 883 | /* we have a flag */ |
| 884 | switch ((*ap)[1]) |
| 885 | { |
| 886 | case 'b': |
| 887 | nobranch = TRUE; |
| 888 | break; |
| 889 | |
| 890 | case 'u': |
| 891 | if ((*ap)[2] != '\0') |
| 892 | usernm = &(*ap)[2]; |
| 893 | else if (ap[1] != NULL && ap[1][0] != '-') |
| 894 | usernm = *++ap; |
| 895 | else |
| 896 | usernm = username(); |
| 897 | break; |
| 898 | } |
| 899 | } |
| 900 | else |
| 901 | { |
| 902 | if (subdir != NULL) |
| 903 | usrerr("too many args"); |
| 904 | else |
| 905 | subdir = *ap; |
| 906 | } |
| 907 | } |
| 908 | |
| 909 | /* |
| 910 | ** Find and open the SCCS directory. |
| 911 | */ |
| 912 | |
| 913 | strcpy(buf, SccsDir); |
| 914 | if (buf[0] != '\0') |
| 915 | strcat(buf, "/"); |
| 916 | if (subdir != NULL) |
| 917 | { |
| 918 | strcat(buf, subdir); |
| 919 | strcat(buf, "/"); |
| 920 | } |
| 921 | strcat(buf, SccsPath); |
| 922 | bufend = &buf[strlen(buf)]; |
| 923 | |
| 924 | dirfd = fopen(buf, "r"); |
| 925 | if (dirfd == NULL) |
| 926 | { |
| 927 | usrerr("cannot open %s", buf); |
| 928 | return (EX_NOINPUT); |
| 929 | } |
| 930 | |
| 931 | /* |
| 932 | ** Scan the SCCS directory looking for s. files. |
| 933 | ** gotedit tells whether we have tried to clean any |
| 934 | ** files that are being edited. |
| 935 | */ |
| 936 | |
| 937 | gotedit = FALSE; |
| 938 | while (fread((char *)&dir, sizeof dir, 1, dirfd) != NULL) |
| 939 | { |
| 940 | if (dir.d_ino == 0 || strncmp(dir.d_name, "s.", 2) != 0) |
| 941 | continue; |
| 942 | |
| 943 | /* got an s. file -- see if the p. file exists */ |
| 944 | strcpy(bufend, "/p."); |
| 945 | basefile = bufend + 3; |
| 946 | strncpy(basefile, &dir.d_name[2], sizeof dir.d_name - 2); |
| 947 | basefile[sizeof dir.d_name - 2] = '\0'; |
| 948 | |
| 949 | /* |
| 950 | ** open and scan the p-file. |
| 951 | ** 'gotpfent' tells if we have found a valid p-file |
| 952 | ** entry. |
| 953 | */ |
| 954 | |
| 955 | pfp = fopen(buf, "r"); |
| 956 | gotpfent = FALSE; |
| 957 | if (pfp != NULL) |
| 958 | { |
| 959 | /* the file exists -- report it's contents */ |
| 960 | while ((pf = getpfent(pfp)) != NULL) |
| 961 | { |
| 962 | if (nobranch && isbranch(pf->p_nsid)) |
| 963 | continue; |
| 964 | if (usernm != NULL && strcmp(usernm, pf->p_user) != 0 && mode != CLEANC) |
| 965 | continue; |
| 966 | gotedit = TRUE; |
| 967 | gotpfent = TRUE; |
| 968 | if (mode == TELLC) |
| 969 | { |
| 970 | printf("%s\n", basefile); |
| 971 | break; |
| 972 | } |
| 973 | printf("%12s: being edited: %s %s %s %s %s\n", |
| 974 | basefile, pf->p_osid, pf->p_nsid, |
| 975 | pf->p_user, pf->p_date, pf->p_time); |
| 976 | } |
| 977 | fclose(pfp); |
| 978 | } |
| 979 | |
| 980 | /* the s. file exists and no p. file exists -- unlink the g-file */ |
| 981 | if (mode == CLEANC && !gotpfent) |
| 982 | { |
| 983 | strncpy(buf, &dir.d_name[2], sizeof dir.d_name - 2); |
| 984 | buf[sizeof dir.d_name - 2] = '\0'; |
| 985 | unlink(buf); |
| 986 | } |
| 987 | } |
| 988 | |
| 989 | /* cleanup & report results */ |
| 990 | fclose(dirfd); |
| 991 | if (!gotedit && mode == INFOC) |
| 992 | { |
| 993 | printf("Nothing being edited"); |
| 994 | if (nobranch) |
| 995 | printf(" (on trunk)"); |
| 996 | if (usernm == NULL) |
| 997 | printf("\n"); |
| 998 | else |
| 999 | printf(" by %s\n", usernm); |
| 1000 | } |
| 1001 | if (mode == CHECKC) |
| 1002 | exit(gotedit); |
| 1003 | return (EX_OK); |
| 1004 | } |
| 1005 | \f |
| 1006 | /* |
| 1007 | ** ISBRANCH -- is the SID a branch? |
| 1008 | ** |
| 1009 | ** Parameters: |
| 1010 | ** sid -- the sid to check. |
| 1011 | ** |
| 1012 | ** Returns: |
| 1013 | ** TRUE if the sid represents a branch. |
| 1014 | ** FALSE otherwise. |
| 1015 | ** |
| 1016 | ** Side Effects: |
| 1017 | ** none. |
| 1018 | */ |
| 1019 | |
| 1020 | isbranch(sid) |
| 1021 | char *sid; |
| 1022 | { |
| 1023 | register char *p; |
| 1024 | int dots; |
| 1025 | |
| 1026 | dots = 0; |
| 1027 | for (p = sid; *p != '\0'; p++) |
| 1028 | { |
| 1029 | if (*p == '.') |
| 1030 | dots++; |
| 1031 | if (dots > 1) |
| 1032 | return (TRUE); |
| 1033 | } |
| 1034 | return (FALSE); |
| 1035 | } |
| 1036 | \f |
| 1037 | /* |
| 1038 | ** UNEDIT -- unedit a file |
| 1039 | ** |
| 1040 | ** Checks to see that the current user is actually editting |
| 1041 | ** the file and arranges that s/he is not editting it. |
| 1042 | ** |
| 1043 | ** Parameters: |
| 1044 | ** fn -- the name of the file to be unedited. |
| 1045 | ** |
| 1046 | ** Returns: |
| 1047 | ** TRUE -- if the file was successfully unedited. |
| 1048 | ** FALSE -- if the file was not unedited for some |
| 1049 | ** reason. |
| 1050 | ** |
| 1051 | ** Side Effects: |
| 1052 | ** fn is removed |
| 1053 | ** entries are removed from pfile. |
| 1054 | */ |
| 1055 | |
| 1056 | bool |
| 1057 | unedit(fn) |
| 1058 | char *fn; |
| 1059 | { |
| 1060 | register FILE *pfp; |
| 1061 | char *pfn; |
| 1062 | static char tfn[] = "/tmp/sccsXXXXX"; |
| 1063 | FILE *tfp; |
| 1064 | register char *q; |
| 1065 | bool delete = FALSE; |
| 1066 | bool others = FALSE; |
| 1067 | char *myname; |
| 1068 | extern char *username(); |
| 1069 | struct pfile *pent; |
| 1070 | extern struct pfile *getpfent(); |
| 1071 | char buf[120]; |
| 1072 | extern char *makefile(); |
| 1073 | |
| 1074 | /* make "s." filename & find the trailing component */ |
| 1075 | pfn = makefile(fn); |
| 1076 | if (pfn == NULL) |
| 1077 | return (FALSE); |
| 1078 | q = rindex(pfn, '/'); |
| 1079 | if (q == NULL) |
| 1080 | q = &pfn[-1]; |
| 1081 | if (q[1] != 's' || q[2] != '.') |
| 1082 | { |
| 1083 | usrerr("bad file name \"%s\"", fn); |
| 1084 | return (FALSE); |
| 1085 | } |
| 1086 | |
| 1087 | /* turn "s." into "p." & try to open it */ |
| 1088 | *++q = 'p'; |
| 1089 | |
| 1090 | pfp = fopen(pfn, "r"); |
| 1091 | if (pfp == NULL) |
| 1092 | { |
| 1093 | printf("%12s: not being edited\n", fn); |
| 1094 | return (FALSE); |
| 1095 | } |
| 1096 | |
| 1097 | /* create temp file for editing p-file */ |
| 1098 | mktemp(tfn); |
| 1099 | tfp = fopen(tfn, "w"); |
| 1100 | if (tfp == NULL) |
| 1101 | { |
| 1102 | usrerr("cannot create \"%s\"", tfn); |
| 1103 | exit(EX_OSERR); |
| 1104 | } |
| 1105 | |
| 1106 | /* figure out who I am */ |
| 1107 | myname = username(); |
| 1108 | |
| 1109 | /* |
| 1110 | ** Copy p-file to temp file, doing deletions as needed. |
| 1111 | */ |
| 1112 | |
| 1113 | while ((pent = getpfent(pfp)) != NULL) |
| 1114 | { |
| 1115 | if (strcmp(pent->p_user, myname) == 0) |
| 1116 | { |
| 1117 | /* a match */ |
| 1118 | delete++; |
| 1119 | } |
| 1120 | else |
| 1121 | { |
| 1122 | /* output it again */ |
| 1123 | fprintf(tfp, "%s %s %s %s %s\n", pent->p_osid, |
| 1124 | pent->p_nsid, pent->p_user, pent->p_date, |
| 1125 | pent->p_time); |
| 1126 | others++; |
| 1127 | } |
| 1128 | } |
| 1129 | |
| 1130 | /* do final cleanup */ |
| 1131 | if (others) |
| 1132 | { |
| 1133 | /* copy it back (perhaps it should be linked?) */ |
| 1134 | if (freopen(tfn, "r", tfp) == NULL) |
| 1135 | { |
| 1136 | syserr("cannot reopen \"%s\"", tfn); |
| 1137 | exit(EX_OSERR); |
| 1138 | } |
| 1139 | if (freopen(pfn, "w", pfp) == NULL) |
| 1140 | { |
| 1141 | usrerr("cannot create \"%s\"", pfn); |
| 1142 | return (FALSE); |
| 1143 | } |
| 1144 | while (fgets(buf, sizeof buf, tfp) != NULL) |
| 1145 | fputs(buf, pfp); |
| 1146 | } |
| 1147 | else |
| 1148 | { |
| 1149 | /* it's empty -- remove it */ |
| 1150 | unlink(pfn); |
| 1151 | } |
| 1152 | fclose(tfp); |
| 1153 | fclose(pfp); |
| 1154 | unlink(tfn); |
| 1155 | |
| 1156 | /* actually remove the g-file */ |
| 1157 | if (delete) |
| 1158 | { |
| 1159 | unlink(tail(fn)); |
| 1160 | printf("%12s: removed\n", tail(fn)); |
| 1161 | return (TRUE); |
| 1162 | } |
| 1163 | else |
| 1164 | { |
| 1165 | printf("%12s: not being edited by you\n", fn); |
| 1166 | return (FALSE); |
| 1167 | } |
| 1168 | } |
| 1169 | \f |
| 1170 | /* |
| 1171 | ** DODIFF -- diff an s-file against a g-file |
| 1172 | ** |
| 1173 | ** Parameters: |
| 1174 | ** getv -- argv for the 'get' command. |
| 1175 | ** gfile -- name of the g-file to diff against. |
| 1176 | ** |
| 1177 | ** Returns: |
| 1178 | ** Result of get. |
| 1179 | ** |
| 1180 | ** Side Effects: |
| 1181 | ** none. |
| 1182 | */ |
| 1183 | |
| 1184 | dodiff(getv, gfile) |
| 1185 | char **getv; |
| 1186 | char *gfile; |
| 1187 | { |
| 1188 | int pipev[2]; |
| 1189 | int rval; |
| 1190 | register int i; |
| 1191 | register int pid; |
| 1192 | auto int st; |
| 1193 | extern int errno; |
| 1194 | int (*osig)(); |
| 1195 | register char *p; |
| 1196 | register char **ap; |
| 1197 | bool makescript = FALSE; |
| 1198 | |
| 1199 | for (ap = getv; *ap != NULL; ap++) |
| 1200 | { |
| 1201 | p = *ap; |
| 1202 | if (p[0] == '-') |
| 1203 | { |
| 1204 | switch (p[1]) |
| 1205 | { |
| 1206 | case 'E': |
| 1207 | p[1] = 'e'; |
| 1208 | makescript = TRUE; |
| 1209 | break; |
| 1210 | } |
| 1211 | } |
| 1212 | } |
| 1213 | |
| 1214 | if (makescript) |
| 1215 | { |
| 1216 | printf("sccs edit %s\n", gfile); |
| 1217 | printf("ed - %s << 'xxEOFxx'\n", gfile); |
| 1218 | } |
| 1219 | else |
| 1220 | printf("\n------- %s -------\n", gfile); |
| 1221 | fflush(stdout); |
| 1222 | |
| 1223 | /* create context for diff to run in */ |
| 1224 | if (pipe(pipev) < 0) |
| 1225 | { |
| 1226 | syserr("dodiff: pipe failed"); |
| 1227 | exit(EX_OSERR); |
| 1228 | } |
| 1229 | if ((pid = fork()) < 0) |
| 1230 | { |
| 1231 | syserr("dodiff: fork failed"); |
| 1232 | exit(EX_OSERR); |
| 1233 | } |
| 1234 | else if (pid > 0) |
| 1235 | { |
| 1236 | /* in parent; run get */ |
| 1237 | OutFile = pipev[1]; |
| 1238 | close(pipev[0]); |
| 1239 | rval = command(&getv[1], TRUE, "get:rcixt -s -k -p"); |
| 1240 | osig = signal(SIGINT, SIG_IGN); |
| 1241 | while (((i = wait(&st)) >= 0 && i != pid) || errno == EINTR) |
| 1242 | errno = 0; |
| 1243 | signal(SIGINT, osig); |
| 1244 | /* ignore result of diff */ |
| 1245 | } |
| 1246 | else |
| 1247 | { |
| 1248 | /* in child, run diff */ |
| 1249 | if (close(pipev[1]) < 0 || close(0) < 0 || |
| 1250 | dup(pipev[0]) != 0 || close(pipev[0]) < 0) |
| 1251 | { |
| 1252 | syserr("dodiff: magic failed"); |
| 1253 | exit(EX_OSERR); |
| 1254 | } |
| 1255 | command(&getv[1], FALSE, "-diff:elsfhbC"); |
| 1256 | } |
| 1257 | |
| 1258 | if (makescript) |
| 1259 | { |
| 1260 | printf("w\n"); |
| 1261 | printf("q\n"); |
| 1262 | printf("'xxEOFxx'\n"); |
| 1263 | printf("sccs delta %s\n", gfile); |
| 1264 | } |
| 1265 | |
| 1266 | return (rval); |
| 1267 | } |
| 1268 | \f |
| 1269 | /* |
| 1270 | ** TAIL -- return tail of filename. |
| 1271 | ** |
| 1272 | ** Parameters: |
| 1273 | ** fn -- the filename. |
| 1274 | ** |
| 1275 | ** Returns: |
| 1276 | ** a pointer to the tail of the filename; e.g., given |
| 1277 | ** "cmd/ls.c", "ls.c" is returned. |
| 1278 | ** |
| 1279 | ** Side Effects: |
| 1280 | ** none. |
| 1281 | */ |
| 1282 | |
| 1283 | char * |
| 1284 | tail(fn) |
| 1285 | register char *fn; |
| 1286 | { |
| 1287 | register char *p; |
| 1288 | |
| 1289 | for (p = fn; *p != 0; p++) |
| 1290 | if (*p == '/' && p[1] != '\0' && p[1] != '/') |
| 1291 | fn = &p[1]; |
| 1292 | return (fn); |
| 1293 | } |
| 1294 | \f |
| 1295 | /* |
| 1296 | ** GETPFENT -- get an entry from the p-file |
| 1297 | ** |
| 1298 | ** Parameters: |
| 1299 | ** pfp -- p-file file pointer |
| 1300 | ** |
| 1301 | ** Returns: |
| 1302 | ** pointer to p-file struct for next entry |
| 1303 | ** NULL on EOF or error |
| 1304 | ** |
| 1305 | ** Side Effects: |
| 1306 | ** Each call wipes out results of previous call. |
| 1307 | */ |
| 1308 | |
| 1309 | struct pfile * |
| 1310 | getpfent(pfp) |
| 1311 | FILE *pfp; |
| 1312 | { |
| 1313 | static struct pfile ent; |
| 1314 | static char buf[120]; |
| 1315 | register char *p; |
| 1316 | extern char *nextfield(); |
| 1317 | |
| 1318 | if (fgets(buf, sizeof buf, pfp) == NULL) |
| 1319 | return (NULL); |
| 1320 | |
| 1321 | ent.p_osid = p = buf; |
| 1322 | ent.p_nsid = p = nextfield(p); |
| 1323 | ent.p_user = p = nextfield(p); |
| 1324 | ent.p_date = p = nextfield(p); |
| 1325 | ent.p_time = p = nextfield(p); |
| 1326 | if (p == NULL || nextfield(p) != NULL) |
| 1327 | return (NULL); |
| 1328 | |
| 1329 | return (&ent); |
| 1330 | } |
| 1331 | |
| 1332 | |
| 1333 | char * |
| 1334 | nextfield(p) |
| 1335 | register char *p; |
| 1336 | { |
| 1337 | if (p == NULL || *p == '\0') |
| 1338 | return (NULL); |
| 1339 | while (*p != ' ' && *p != '\n' && *p != '\0') |
| 1340 | p++; |
| 1341 | if (*p == '\n' || *p == '\0') |
| 1342 | { |
| 1343 | *p = '\0'; |
| 1344 | return (NULL); |
| 1345 | } |
| 1346 | *p++ = '\0'; |
| 1347 | return (p); |
| 1348 | } |
| 1349 | \f |
| 1350 | /* |
| 1351 | ** USRERR -- issue user-level error |
| 1352 | ** |
| 1353 | ** Parameters: |
| 1354 | ** f -- format string. |
| 1355 | ** p1-p3 -- parameters to a printf. |
| 1356 | ** |
| 1357 | ** Returns: |
| 1358 | ** -1 |
| 1359 | ** |
| 1360 | ** Side Effects: |
| 1361 | ** none. |
| 1362 | */ |
| 1363 | |
| 1364 | /*VARARGS1*/ |
| 1365 | usrerr(f, p1, p2, p3) |
| 1366 | char *f; |
| 1367 | { |
| 1368 | fprintf(stderr, "\n%s: ", MyName); |
| 1369 | fprintf(stderr, f, p1, p2, p3); |
| 1370 | fprintf(stderr, "\n"); |
| 1371 | |
| 1372 | return (-1); |
| 1373 | } |
| 1374 | \f |
| 1375 | /* |
| 1376 | ** SYSERR -- print system-generated error. |
| 1377 | ** |
| 1378 | ** Parameters: |
| 1379 | ** f -- format string to a printf. |
| 1380 | ** p1, p2, p3 -- parameters to f. |
| 1381 | ** |
| 1382 | ** Returns: |
| 1383 | ** never. |
| 1384 | ** |
| 1385 | ** Side Effects: |
| 1386 | ** none. |
| 1387 | */ |
| 1388 | |
| 1389 | /*VARARGS1*/ |
| 1390 | syserr(f, p1, p2, p3) |
| 1391 | char *f; |
| 1392 | { |
| 1393 | extern int errno; |
| 1394 | |
| 1395 | fprintf(stderr, "\n%s SYSERR: ", MyName); |
| 1396 | fprintf(stderr, f, p1, p2, p3); |
| 1397 | fprintf(stderr, "\n"); |
| 1398 | if (errno == 0) |
| 1399 | exit(EX_SOFTWARE); |
| 1400 | else |
| 1401 | { |
| 1402 | perror(NULL); |
| 1403 | exit(EX_OSERR); |
| 1404 | } |
| 1405 | } |
| 1406 | \f/* |
| 1407 | ** USERNAME -- return name of the current user |
| 1408 | ** |
| 1409 | ** Parameters: |
| 1410 | ** none |
| 1411 | ** |
| 1412 | ** Returns: |
| 1413 | ** name of current user |
| 1414 | ** |
| 1415 | ** Side Effects: |
| 1416 | ** none |
| 1417 | */ |
| 1418 | |
| 1419 | char * |
| 1420 | username() |
| 1421 | { |
| 1422 | # ifdef UIDUSER |
| 1423 | extern struct passwd *getpwuid(); |
| 1424 | register struct passwd *pw; |
| 1425 | |
| 1426 | pw = getpwuid(getuid()); |
| 1427 | if (pw == NULL) |
| 1428 | { |
| 1429 | syserr("who are you? (uid=%d)", getuid()); |
| 1430 | exit(EX_OSERR); |
| 1431 | } |
| 1432 | return (pw->pw_name); |
| 1433 | # else |
| 1434 | extern char *getlogin(); |
| 1435 | |
| 1436 | return (getlogin()); |
| 1437 | # endif UIDUSER |
| 1438 | } |