Annotation of src/usr.bin/rcs/rcsutil.c, Revision 1.48
1.48 ! guenther 1: /* $OpenBSD: rcsutil.c,v 1.47 2020/10/14 20:07:19 naddy Exp $ */
1.1 xsa 2: /*
3: * Copyright (c) 2005, 2006 Joris Vink <joris@openbsd.org>
4: * Copyright (c) 2006 Xavier Santolaria <xsa@openbsd.org>
5: * Copyright (c) 2006 Niall O'Higgins <niallo@openbsd.org>
6: * Copyright (c) 2006 Ray Lai <ray@openbsd.org>
7: * All rights reserved.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: *
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. The name of the author may not be used to endorse or promote products
16: * derived from this software without specific prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
19: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
20: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21: * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
27: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28: */
29:
1.29 xsa 30: #include <sys/stat.h>
1.38 chl 31: #include <sys/time.h>
1.29 xsa 32:
33: #include <ctype.h>
34: #include <err.h>
35: #include <fcntl.h>
36: #include <stdio.h>
1.44 nicm 37: #include <stdlib.h>
1.29 xsa 38: #include <string.h>
39: #include <unistd.h>
1.1 xsa 40:
41: #include "rcsprog.h"
42:
43: /*
44: * rcs_get_mtime()
45: *
46: * Get <filename> last modified time.
1.48 ! guenther 47: * Returns last modified time on success, or a timespec with tv_nsec
! 48: * set to UTIME_OMIT on failure.
1.1 xsa 49: */
1.48 ! guenther 50: struct timespec
1.6 joris 51: rcs_get_mtime(RCSFILE *file)
1.1 xsa 52: {
53: struct stat st;
1.48 ! guenther 54: struct timespec mtime = { .tv_sec = 0, .tv_nsec = UTIME_OMIT };
1.1 xsa 55:
1.37 tobias 56: if (file->rf_file == NULL)
1.48 ! guenther 57: return mtime;
1.37 tobias 58:
59: if (fstat(fileno(file->rf_file), &st) == -1) {
1.6 joris 60: warn("%s", file->rf_path);
1.48 ! guenther 61: return mtime;
1.1 xsa 62: }
1.6 joris 63:
1.48 ! guenther 64: return st.st_mtim;
1.1 xsa 65: }
66:
67: /*
68: * rcs_set_mtime()
69: *
1.48 ! guenther 70: * Set <filename> last modified time to <mtime> if its tv_nsec isn't UTIME_OMIT
1.1 xsa 71: */
72: void
1.48 ! guenther 73: rcs_set_mtime(RCSFILE *file, struct timespec mtime)
1.1 xsa 74: {
1.48 ! guenther 75: struct timespec ts[2];
1.1 xsa 76:
1.48 ! guenther 77: if (file->rf_file == NULL || mtime.tv_nsec == UTIME_OMIT)
1.1 xsa 78: return;
79:
1.48 ! guenther 80: ts[0] = ts[1] = mtime;
1.1 xsa 81:
1.48 ! guenther 82: if (futimens(fileno(file->rf_file), ts) == -1)
1.3 xsa 83: err(1, "utimes");
1.1 xsa 84: }
85:
86: int
87: rcs_getopt(int argc, char **argv, const char *optstr)
88: {
89: char *a;
90: const char *c;
91: static int i = 1;
92: int opt, hasargument, ret;
93:
94: hasargument = 0;
95: rcs_optarg = NULL;
96:
97: if (i >= argc)
98: return (-1);
99:
100: a = argv[i++];
101: if (*a++ != '-')
102: return (-1);
103:
104: ret = 0;
105: opt = *a;
106: for (c = optstr; *c != '\0'; c++) {
107: if (*c == opt) {
108: a++;
109: ret = opt;
110:
111: if (*(c + 1) == ':') {
112: if (*(c + 2) == ':') {
113: if (*a != '\0')
114: hasargument = 1;
115: } else {
116: if (*a != '\0') {
117: hasargument = 1;
118: } else {
119: ret = 1;
120: break;
121: }
122: }
123: }
124:
125: if (hasargument == 1)
126: rcs_optarg = a;
127:
128: if (ret == opt)
129: rcs_optind++;
130: break;
131: }
132: }
133:
134: if (ret == 0)
135: warnx("unknown option -%c", opt);
136: else if (ret == 1)
137: warnx("missing argument for option -%c", opt);
138:
139: return (ret);
140: }
141:
142: /*
143: * rcs_choosefile()
144: *
145: * Given a relative filename, decide where the corresponding RCS file
146: * should be. Tries each extension until a file is found. If no file
147: * was found, returns a path with the first extension.
148: *
1.11 ray 149: * Opens and returns file descriptor to RCS file.
1.1 xsa 150: */
1.6 joris 151: int
152: rcs_choosefile(const char *filename, char *out, size_t len)
1.1 xsa 153: {
1.6 joris 154: int fd;
1.1 xsa 155: struct stat sb;
1.43 deraadt 156: char *p, *ext, name[PATH_MAX], *next, *ptr, rcsdir[PATH_MAX],
157: *suffixes, rcspath[PATH_MAX];
1.6 joris 158:
1.1 xsa 159: /*
160: * If `filename' contains a directory, `rcspath' contains that
161: * directory, including a trailing slash. Otherwise `rcspath'
162: * contains an empty string.
163: */
164: if (strlcpy(rcspath, filename, sizeof(rcspath)) >= sizeof(rcspath))
1.6 joris 165: errx(1, "rcs_choosefile: truncation");
166:
1.1 xsa 167: /* If `/' is found, end string after `/'. */
168: if ((ptr = strrchr(rcspath, '/')) != NULL)
169: *(++ptr) = '\0';
170: else
171: rcspath[0] = '\0';
172:
173: /* Append RCS/ to `rcspath' if it exists. */
174: if (strlcpy(rcsdir, rcspath, sizeof(rcsdir)) >= sizeof(rcsdir) ||
175: strlcat(rcsdir, RCSDIR, sizeof(rcsdir)) >= sizeof(rcsdir))
1.6 joris 176: errx(1, "rcs_choosefile: truncation");
177:
1.19 otto 178: if (stat(rcsdir, &sb) == 0 && S_ISDIR(sb.st_mode))
1.6 joris 179: if (strlcpy(rcspath, rcsdir, sizeof(rcspath))
180: >= sizeof(rcspath) ||
1.1 xsa 181: strlcat(rcspath, "/", sizeof(rcspath)) >= sizeof(rcspath))
1.6 joris 182: errx(1, "rcs_choosefile: truncation");
1.1 xsa 183:
184: /* Name of file without path. */
185: if ((ptr = strrchr(filename, '/')) == NULL) {
186: if (strlcpy(name, filename, sizeof(name)) >= sizeof(name))
1.6 joris 187: errx(1, "rcs_choosefile: truncation");
1.1 xsa 188: } else {
189: /* Skip `/'. */
190: if (strlcpy(name, ptr + 1, sizeof(name)) >= sizeof(name))
1.6 joris 191: errx(1, "rcs_choosefile: truncation");
1.1 xsa 192: }
193:
194: /* Name of RCS file without an extension. */
195: if (strlcat(rcspath, name, sizeof(rcspath)) >= sizeof(rcspath))
1.6 joris 196: errx(1, "rcs_choosefile: truncation");
1.1 xsa 197:
198: /*
199: * If only the empty suffix was given, use existing rcspath.
200: * This ensures that there is at least one suffix for strsep().
201: */
202: if (strcmp(rcs_suffixes, "") == 0) {
1.8 ray 203: if (strlcpy(out, rcspath, len) >= len)
204: errx(1, "rcs_choosefile: truncation");
1.22 niallo 205: fd = open(rcspath, O_RDONLY);
1.6 joris 206: return (fd);
1.1 xsa 207: }
208:
209: /*
210: * Cycle through slash-separated `rcs_suffixes', appending each
211: * extension to `rcspath' and testing if the file exists. If it
212: * does, return that string. Otherwise return path with first
213: * extension.
214: */
215: suffixes = xstrdup(rcs_suffixes);
1.10 ray 216: for (next = suffixes; (ext = strsep(&next, "/")) != NULL;) {
1.43 deraadt 217: char fpath[PATH_MAX];
1.1 xsa 218:
219: if ((p = strrchr(rcspath, ',')) != NULL) {
220: if (!strcmp(p, ext)) {
1.6 joris 221: if ((fd = open(rcspath, O_RDONLY)) == -1)
222: continue;
223:
224: if (fstat(fd, &sb) == -1)
225: err(1, "%s", rcspath);
226:
227: if (strlcpy(out, rcspath, len) >= len)
1.47 naddy 228: errx(1, "rcs_choosefile: truncation");
1.6 joris 229:
1.44 nicm 230: free(suffixes);
1.6 joris 231: return (fd);
1.1 xsa 232: }
233:
234: continue;
235: }
236:
237: /* Construct RCS file path. */
238: if (strlcpy(fpath, rcspath, sizeof(fpath)) >= sizeof(fpath) ||
239: strlcat(fpath, ext, sizeof(fpath)) >= sizeof(fpath))
1.6 joris 240: errx(1, "rcs_choosefile: truncation");
1.1 xsa 241:
242: /* Don't use `filename' as RCS file. */
243: if (strcmp(fpath, filename) == 0)
244: continue;
245:
1.6 joris 246: if ((fd = open(fpath, O_RDONLY)) == -1)
247: continue;
248:
249: if (fstat(fd, &sb) == -1)
250: err(1, "%s", fpath);
251:
252: if (strlcpy(out, fpath, len) >= len)
253: errx(1, "rcs_choosefile: truncation");
254:
1.44 nicm 255: free(suffixes);
1.6 joris 256: return (fd);
1.1 xsa 257: }
258:
259: /*
260: * `suffixes' should now be NUL separated, so the first
261: * extension can be read just by reading `suffixes'.
262: */
1.11 ray 263: if (strlcat(rcspath, suffixes, sizeof(rcspath)) >= sizeof(rcspath))
1.6 joris 264: errx(1, "rcs_choosefile: truncation");
1.1 xsa 265:
1.44 nicm 266: free(suffixes);
1.6 joris 267:
1.8 ray 268: if (strlcpy(out, rcspath, len) >= len)
269: errx(1, "rcs_choosefile: truncation");
1.22 niallo 270:
271: fd = open(rcspath, O_RDONLY);
1.1 xsa 272:
1.6 joris 273: return (fd);
1.1 xsa 274: }
275:
276: /*
277: * Set <str> to <new_str>. Print warning if <str> is redefined.
278: */
279: void
280: rcs_setrevstr(char **str, char *new_str)
281: {
282: if (new_str == NULL)
283: return;
284: if (*str != NULL)
285: warnx("redefinition of revision number");
286: *str = new_str;
287: }
288:
289: /*
290: * Set <str1> or <str2> to <new_str>, depending on which is not set.
291: * If both are set, error out.
292: */
293: void
294: rcs_setrevstr2(char **str1, char **str2, char *new_str)
295: {
296: if (new_str == NULL)
297: return;
298: if (*str1 == NULL)
299: *str1 = new_str;
300: else if (*str2 == NULL)
301: *str2 = new_str;
302: else
1.3 xsa 303: errx(1, "too many revision numbers");
1.1 xsa 304: }
305:
306: /*
307: * Get revision from file. The revision can be specified as a symbol or
308: * a revision number.
309: */
310: RCSNUM *
311: rcs_getrevnum(const char *rev_str, RCSFILE *file)
312: {
313: RCSNUM *rev;
314:
315: /* Search for symbol. */
316: rev = rcs_sym_getrev(file, rev_str);
317:
318: /* Search for revision number. */
319: if (rev == NULL)
320: rev = rcsnum_parse(rev_str);
321:
322: return (rev);
323: }
324:
325: /*
326: * Prompt for and store user's input in an allocated string.
327: *
328: * Returns the string's pointer.
329: */
330: char *
1.45 millert 331: rcs_prompt(const char *prompt, int flags)
1.1 xsa 332: {
333: BUF *bp;
334: size_t len;
335: char *buf;
336:
1.45 millert 337: if (!(flags & INTERACTIVE) && isatty(STDIN_FILENO))
338: flags |= INTERACTIVE;
339:
1.35 ray 340: bp = buf_alloc(0);
1.45 millert 341: if (flags & INTERACTIVE)
1.1 xsa 342: (void)fprintf(stderr, "%s", prompt);
1.45 millert 343: if (flags & INTERACTIVE)
1.1 xsa 344: (void)fprintf(stderr, ">> ");
1.25 ray 345: clearerr(stdin);
1.1 xsa 346: while ((buf = fgetln(stdin, &len)) != NULL) {
347: /* The last line may not be EOL terminated. */
348: if (buf[0] == '.' && (len == 1 || buf[1] == '\n'))
349: break;
350: else
1.34 ray 351: buf_append(bp, buf, len);
1.1 xsa 352:
1.45 millert 353: if (flags & INTERACTIVE)
1.1 xsa 354: (void)fprintf(stderr, ">> ");
355: }
1.34 ray 356: buf_putc(bp, '\0');
1.1 xsa 357:
1.34 ray 358: return (buf_release(bp));
1.1 xsa 359: }
360:
361: u_int
1.14 ray 362: rcs_rev_select(RCSFILE *file, const char *range)
1.1 xsa 363: {
364: int i;
365: u_int nrev;
1.46 otto 366: const char *ep;
1.1 xsa 367: char *lstr, *rstr;
368: struct rcs_delta *rdp;
1.5 joris 369: struct rcs_argvector *revargv, *revrange;
1.1 xsa 370: RCSNUM lnum, rnum;
371:
372: nrev = 0;
373: (void)memset(&lnum, 0, sizeof(lnum));
374: (void)memset(&rnum, 0, sizeof(rnum));
375:
376: if (range == NULL) {
377: TAILQ_FOREACH(rdp, &file->rf_delta, rd_list)
378: if (rcsnum_cmp(rdp->rd_num, file->rf_head, 0) == 0) {
379: rdp->rd_flags |= RCS_RD_SELECT;
380: return (1);
381: }
382: return (0);
383: }
384:
1.5 joris 385: revargv = rcs_strsplit(range, ",");
1.1 xsa 386: for (i = 0; revargv->argv[i] != NULL; i++) {
1.5 joris 387: revrange = rcs_strsplit(revargv->argv[i], ":");
1.1 xsa 388: if (revrange->argv[0] == NULL)
389: /* should not happen */
1.3 xsa 390: errx(1, "invalid revision range: %s", revargv->argv[i]);
1.1 xsa 391: else if (revrange->argv[1] == NULL)
392: lstr = rstr = revrange->argv[0];
393: else {
394: if (revrange->argv[2] != NULL)
1.3 xsa 395: errx(1, "invalid revision range: %s",
396: revargv->argv[i]);
1.1 xsa 397: lstr = revrange->argv[0];
398: rstr = revrange->argv[1];
399: if (strcmp(lstr, "") == 0)
400: lstr = NULL;
401: if (strcmp(rstr, "") == 0)
402: rstr = NULL;
403: }
404:
405: if (lstr == NULL)
406: lstr = RCS_HEAD_INIT;
407: if (rcsnum_aton(lstr, &ep, &lnum) == 0 || (*ep != '\0'))
1.3 xsa 408: errx(1, "invalid revision: %s", lstr);
1.1 xsa 409:
410: if (rstr != NULL) {
411: if (rcsnum_aton(rstr, &ep, &rnum) == 0 || (*ep != '\0'))
1.3 xsa 412: errx(1, "invalid revision: %s", rstr);
1.1 xsa 413: } else
414: rcsnum_cpy(file->rf_head, &rnum, 0);
415:
1.5 joris 416: rcs_argv_destroy(revrange);
1.1 xsa 417:
418: TAILQ_FOREACH(rdp, &file->rf_delta, rd_list)
419: if (rcsnum_cmp(rdp->rd_num, &lnum, 0) <= 0 &&
420: rcsnum_cmp(rdp->rd_num, &rnum, 0) >= 0 &&
421: !(rdp->rd_flags & RCS_RD_SELECT)) {
422: rdp->rd_flags |= RCS_RD_SELECT;
423: nrev++;
424: }
425: }
1.5 joris 426: rcs_argv_destroy(revargv);
1.1 xsa 427:
1.44 nicm 428: free(lnum.rn_id);
429: free(rnum.rn_id);
1.1 xsa 430:
431: return (nrev);
1.2 ray 432: }
433:
434: /*
435: * Load description from <in> to <file>.
436: * If <in> starts with a `-', <in> is taken as the description.
437: * Otherwise <in> is the name of the file containing the description.
438: * If <in> is NULL, the description is read from stdin.
1.18 ray 439: * Returns 0 on success, -1 on failure, setting errno.
1.2 ray 440: */
1.18 ray 441: int
1.45 millert 442: rcs_set_description(RCSFILE *file, const char *in, int flags)
1.2 ray 443: {
444: BUF *bp;
445: char *content;
446: const char *prompt =
447: "enter description, terminated with single '.' or end of file:\n"
448: "NOTE: This is NOT the log message!\n";
449:
450: /* Description is in file <in>. */
451: if (in != NULL && *in != '-') {
1.35 ray 452: if ((bp = buf_load(in)) == NULL)
1.18 ray 453: return (-1);
1.34 ray 454: buf_putc(bp, '\0');
455: content = buf_release(bp);
1.2 ray 456: /* Description is in <in>. */
457: } else if (in != NULL)
458: /* Skip leading `-'. */
459: content = xstrdup(in + 1);
460: /* Get description from stdin. */
461: else
1.45 millert 462: content = rcs_prompt(prompt, flags);
1.2 ray 463:
464: rcs_desc_set(file, content);
1.44 nicm 465: free(content);
1.18 ray 466: return (0);
1.7 xsa 467: }
468:
469: /*
470: * Split the contents of a file into a list of lines.
471: */
472: struct rcs_lines *
1.27 xsa 473: rcs_splitlines(u_char *data, size_t len)
1.7 xsa 474: {
1.15 niallo 475: u_char *c, *p;
1.7 xsa 476: struct rcs_lines *lines;
477: struct rcs_line *lp;
1.24 niallo 478: size_t i, tlen;
1.7 xsa 479:
1.40 tedu 480: lines = xcalloc(1, sizeof(*lines));
1.7 xsa 481: TAILQ_INIT(&(lines->l_lines));
482:
1.40 tedu 483: lp = xcalloc(1, sizeof(*lp));
1.7 xsa 484: TAILQ_INSERT_TAIL(&(lines->l_lines), lp, l_list);
485:
486:
1.24 niallo 487: p = c = data;
488: for (i = 0; i < len; i++) {
489: if (*p == '\n' || (i == len - 1)) {
1.26 niallo 490: tlen = p - c + 1;
1.15 niallo 491: lp = xmalloc(sizeof(*lp));
1.24 niallo 492: lp->l_line = c;
493: lp->l_len = tlen;
1.15 niallo 494: lp->l_lineno = ++(lines->l_nblines);
495: TAILQ_INSERT_TAIL(&(lines->l_lines), lp, l_list);
496: c = p + 1;
497: }
498: p++;
1.7 xsa 499: }
500:
501: return (lines);
502: }
503:
504: void
505: rcs_freelines(struct rcs_lines *lines)
506: {
507: struct rcs_line *lp;
508:
509: while ((lp = TAILQ_FIRST(&(lines->l_lines))) != NULL) {
510: TAILQ_REMOVE(&(lines->l_lines), lp, l_list);
1.44 nicm 511: free(lp);
1.7 xsa 512: }
513:
1.44 nicm 514: free(lines);
1.7 xsa 515: }
516:
517: BUF *
1.27 xsa 518: rcs_patchfile(u_char *data, size_t dlen, u_char *patch, size_t plen,
1.7 xsa 519: int (*p)(struct rcs_lines *, struct rcs_lines *))
520: {
521: struct rcs_lines *dlines, *plines;
522: struct rcs_line *lp;
523: BUF *res;
524:
1.24 niallo 525: dlines = rcs_splitlines(data, dlen);
526: plines = rcs_splitlines(patch, plen);
1.7 xsa 527:
528: if (p(dlines, plines) < 0) {
529: rcs_freelines(dlines);
530: rcs_freelines(plines);
531: return (NULL);
532: }
533:
1.35 ray 534: res = buf_alloc(1024);
1.7 xsa 535: TAILQ_FOREACH(lp, &dlines->l_lines, l_list) {
1.24 niallo 536: if (lp->l_line == NULL)
537: continue;
1.34 ray 538: buf_append(res, lp->l_line, lp->l_len);
1.7 xsa 539: }
540:
541: rcs_freelines(dlines);
542: rcs_freelines(plines);
543: return (res);
544: }
545:
546: /*
547: * rcs_yesno()
548: *
1.23 millert 549: * Read a char from standard input, returns defc if the
550: * user enters an equivalent to defc, else whatever char
551: * was entered. Converts input to lower case.
1.7 xsa 552: */
553: int
1.23 millert 554: rcs_yesno(int defc)
1.7 xsa 555: {
556: int c, ret;
557:
558: fflush(stderr);
559: fflush(stdout);
560:
1.25 ray 561: clearerr(stdin);
1.23 millert 562: if (isalpha(c = getchar()))
563: c = tolower(c);
564: if (c == defc || c == '\n' || (c == EOF && feof(stdin)))
565: ret = defc;
1.7 xsa 566: else
1.23 millert 567: ret = c;
568:
569: while (c != EOF && c != '\n')
570: c = getchar();
1.7 xsa 571:
572: return (ret);
573: }
574:
575: /*
576: * rcs_strsplit()
577: *
578: * Split a string <str> of <sep>-separated values and allocate
579: * an argument vector for the values found.
580: */
581: struct rcs_argvector *
1.14 ray 582: rcs_strsplit(const char *str, const char *sep)
1.7 xsa 583: {
584: struct rcs_argvector *av;
585: size_t i = 0;
586: char *cp, *p;
587:
588: cp = xstrdup(str);
589: av = xmalloc(sizeof(*av));
590: av->str = cp;
1.31 ray 591: av->argv = xmalloc(sizeof(*(av->argv)));
1.7 xsa 592:
593: while ((p = strsep(&cp, sep)) != NULL) {
594: av->argv[i++] = p;
1.42 deraadt 595: av->argv = xreallocarray(av->argv,
1.7 xsa 596: i + 1, sizeof(*(av->argv)));
597: }
598: av->argv[i] = NULL;
599:
600: return (av);
601: }
602:
603: /*
604: * rcs_argv_destroy()
605: *
606: * Free an argument vector previously allocated by rcs_strsplit().
607: */
608: void
609: rcs_argv_destroy(struct rcs_argvector *av)
610: {
1.44 nicm 611: free(av->str);
612: free(av->argv);
613: free(av);
1.28 otto 614: }
615:
616: /*
617: * Strip suffix from filename.
618: */
619: void
620: rcs_strip_suffix(char *filename)
621: {
622: char *p, *suffixes, *next, *ext;
623:
624: if ((p = strrchr(filename, ',')) != NULL) {
625: suffixes = xstrdup(rcs_suffixes);
626: for (next = suffixes; (ext = strsep(&next, "/")) != NULL;) {
627: if (!strcmp(p, ext)) {
628: *p = '\0';
629: break;
630: }
631: }
1.44 nicm 632: free(suffixes);
1.28 otto 633: }
1.1 xsa 634: }
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