Annotation of src/usr.bin/rcs/rcsutil.c, Revision 1.25
1.25 ! ray 1: /* $OpenBSD: rcsutil.c,v 1.24 2007/01/02 16:43:45 niallo 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:
30: #include "includes.h"
31:
32: #include "rcsprog.h"
33:
34: /*
35: * rcs_get_mtime()
36: *
37: * Get <filename> last modified time.
38: * Returns last modified time on success, or -1 on failure.
39: */
40: time_t
1.6 joris 41: rcs_get_mtime(RCSFILE *file)
1.1 xsa 42: {
43: struct stat st;
44: time_t mtime;
45:
1.13 ray 46: if (fstat(file->rf_fd, &st) == -1) {
1.6 joris 47: warn("%s", file->rf_path);
1.1 xsa 48: return (-1);
49: }
1.6 joris 50:
1.1 xsa 51: mtime = (time_t)st.st_mtimespec.tv_sec;
52:
53: return (mtime);
54: }
55:
56: /*
57: * rcs_set_mtime()
58: *
59: * Set <filename> last modified time to <mtime> if it's not set to -1.
60: */
61: void
1.6 joris 62: rcs_set_mtime(RCSFILE *file, time_t mtime)
1.1 xsa 63: {
64: static struct timeval tv[2];
65:
66: if (mtime == -1)
67: return;
68:
69: tv[0].tv_sec = mtime;
70: tv[1].tv_sec = tv[0].tv_sec;
71:
1.13 ray 72: if (futimes(file->rf_fd, tv) == -1)
1.3 xsa 73: err(1, "utimes");
1.1 xsa 74: }
75:
76: int
77: rcs_getopt(int argc, char **argv, const char *optstr)
78: {
79: char *a;
80: const char *c;
81: static int i = 1;
82: int opt, hasargument, ret;
83:
84: hasargument = 0;
85: rcs_optarg = NULL;
86:
87: if (i >= argc)
88: return (-1);
89:
90: a = argv[i++];
91: if (*a++ != '-')
92: return (-1);
93:
94: ret = 0;
95: opt = *a;
96: for (c = optstr; *c != '\0'; c++) {
97: if (*c == opt) {
98: a++;
99: ret = opt;
100:
101: if (*(c + 1) == ':') {
102: if (*(c + 2) == ':') {
103: if (*a != '\0')
104: hasargument = 1;
105: } else {
106: if (*a != '\0') {
107: hasargument = 1;
108: } else {
109: ret = 1;
110: break;
111: }
112: }
113: }
114:
115: if (hasargument == 1)
116: rcs_optarg = a;
117:
118: if (ret == opt)
119: rcs_optind++;
120: break;
121: }
122: }
123:
124: if (ret == 0)
125: warnx("unknown option -%c", opt);
126: else if (ret == 1)
127: warnx("missing argument for option -%c", opt);
128:
129: return (ret);
130: }
131:
132: /*
133: * rcs_choosefile()
134: *
135: * Given a relative filename, decide where the corresponding RCS file
136: * should be. Tries each extension until a file is found. If no file
137: * was found, returns a path with the first extension.
138: *
1.11 ray 139: * Opens and returns file descriptor to RCS file.
1.1 xsa 140: */
1.6 joris 141: int
142: rcs_choosefile(const char *filename, char *out, size_t len)
1.1 xsa 143: {
1.6 joris 144: int fd;
1.1 xsa 145: struct stat sb;
146: char *p, *ext, name[MAXPATHLEN], *next, *ptr, rcsdir[MAXPATHLEN],
1.10 ray 147: *suffixes, rcspath[MAXPATHLEN];
1.1 xsa 148:
149: /* If -x flag was not given, use default. */
150: if (rcs_suffixes == NULL)
151: rcs_suffixes = RCS_DEFAULT_SUFFIX;
152:
1.6 joris 153: fd = -1;
154:
1.1 xsa 155: /*
156: * If `filename' contains a directory, `rcspath' contains that
157: * directory, including a trailing slash. Otherwise `rcspath'
158: * contains an empty string.
159: */
160: if (strlcpy(rcspath, filename, sizeof(rcspath)) >= sizeof(rcspath))
1.6 joris 161: errx(1, "rcs_choosefile: truncation");
162:
1.1 xsa 163: /* If `/' is found, end string after `/'. */
164: if ((ptr = strrchr(rcspath, '/')) != NULL)
165: *(++ptr) = '\0';
166: else
167: rcspath[0] = '\0';
168:
169: /* Append RCS/ to `rcspath' if it exists. */
170: if (strlcpy(rcsdir, rcspath, sizeof(rcsdir)) >= sizeof(rcsdir) ||
171: strlcat(rcsdir, RCSDIR, sizeof(rcsdir)) >= sizeof(rcsdir))
1.6 joris 172: errx(1, "rcs_choosefile: truncation");
173:
1.19 otto 174: if (stat(rcsdir, &sb) == 0 && S_ISDIR(sb.st_mode))
1.6 joris 175: if (strlcpy(rcspath, rcsdir, sizeof(rcspath))
176: >= sizeof(rcspath) ||
1.1 xsa 177: strlcat(rcspath, "/", sizeof(rcspath)) >= sizeof(rcspath))
1.6 joris 178: errx(1, "rcs_choosefile: truncation");
1.1 xsa 179:
180: /* Name of file without path. */
181: if ((ptr = strrchr(filename, '/')) == NULL) {
182: if (strlcpy(name, filename, sizeof(name)) >= sizeof(name))
1.6 joris 183: errx(1, "rcs_choosefile: truncation");
1.1 xsa 184: } else {
185: /* Skip `/'. */
186: if (strlcpy(name, ptr + 1, sizeof(name)) >= sizeof(name))
1.6 joris 187: errx(1, "rcs_choosefile: truncation");
1.1 xsa 188: }
189:
190: /* Name of RCS file without an extension. */
191: if (strlcat(rcspath, name, sizeof(rcspath)) >= sizeof(rcspath))
1.6 joris 192: errx(1, "rcs_choosefile: truncation");
1.1 xsa 193:
194: /*
195: * If only the empty suffix was given, use existing rcspath.
196: * This ensures that there is at least one suffix for strsep().
197: */
198: if (strcmp(rcs_suffixes, "") == 0) {
1.8 ray 199: if (strlcpy(out, rcspath, len) >= len)
200: errx(1, "rcs_choosefile: truncation");
1.22 niallo 201: fd = open(rcspath, O_RDONLY);
1.6 joris 202: return (fd);
1.1 xsa 203: }
204:
205: /*
206: * Cycle through slash-separated `rcs_suffixes', appending each
207: * extension to `rcspath' and testing if the file exists. If it
208: * does, return that string. Otherwise return path with first
209: * extension.
210: */
211: suffixes = xstrdup(rcs_suffixes);
1.10 ray 212: for (next = suffixes; (ext = strsep(&next, "/")) != NULL;) {
1.1 xsa 213: char fpath[MAXPATHLEN];
214:
215: if ((p = strrchr(rcspath, ',')) != NULL) {
216: if (!strcmp(p, ext)) {
1.6 joris 217: if ((fd = open(rcspath, O_RDONLY)) == -1)
218: continue;
219:
220: if (fstat(fd, &sb) == -1)
221: err(1, "%s", rcspath);
222:
223: if (strlcpy(out, rcspath, len) >= len)
224: errx(1, "rcs_choosefile; truncation");
225:
226: return (fd);
1.1 xsa 227: }
228:
229: continue;
230: }
231:
232: /* Construct RCS file path. */
233: if (strlcpy(fpath, rcspath, sizeof(fpath)) >= sizeof(fpath) ||
234: strlcat(fpath, ext, sizeof(fpath)) >= sizeof(fpath))
1.6 joris 235: errx(1, "rcs_choosefile: truncation");
1.1 xsa 236:
237: /* Don't use `filename' as RCS file. */
238: if (strcmp(fpath, filename) == 0)
239: continue;
240:
1.6 joris 241: if ((fd = open(fpath, O_RDONLY)) == -1)
242: continue;
243:
244: if (fstat(fd, &sb) == -1)
245: err(1, "%s", fpath);
246:
247: if (strlcpy(out, fpath, len) >= len)
248: errx(1, "rcs_choosefile: truncation");
249:
250: return (fd);
1.1 xsa 251: }
252:
253: /*
254: * `suffixes' should now be NUL separated, so the first
255: * extension can be read just by reading `suffixes'.
256: */
1.11 ray 257: if (strlcat(rcspath, suffixes, sizeof(rcspath)) >= sizeof(rcspath))
1.6 joris 258: errx(1, "rcs_choosefile: truncation");
1.1 xsa 259:
260: xfree(suffixes);
1.6 joris 261:
1.8 ray 262: if (strlcpy(out, rcspath, len) >= len)
263: errx(1, "rcs_choosefile: truncation");
1.22 niallo 264:
265: fd = open(rcspath, O_RDONLY);
1.1 xsa 266:
1.6 joris 267: return (fd);
1.1 xsa 268: }
269:
270: /*
271: * Allocate an RCSNUM and store in <rev>.
272: */
273: void
274: rcs_set_rev(const char *str, RCSNUM **rev)
275: {
276: if (str == NULL || (*rev = rcsnum_parse(str)) == NULL)
1.4 xsa 277: errx(1, "bad revision number `%s'", str);
1.1 xsa 278: }
279:
280: /*
281: * Set <str> to <new_str>. Print warning if <str> is redefined.
282: */
283: void
284: rcs_setrevstr(char **str, char *new_str)
285: {
286: if (new_str == NULL)
287: return;
288: if (*str != NULL)
289: warnx("redefinition of revision number");
290: *str = new_str;
291: }
292:
293: /*
294: * Set <str1> or <str2> to <new_str>, depending on which is not set.
295: * If both are set, error out.
296: */
297: void
298: rcs_setrevstr2(char **str1, char **str2, char *new_str)
299: {
300: if (new_str == NULL)
301: return;
302: if (*str1 == NULL)
303: *str1 = new_str;
304: else if (*str2 == NULL)
305: *str2 = new_str;
306: else
1.3 xsa 307: errx(1, "too many revision numbers");
1.1 xsa 308: }
309:
310: /*
311: * Get revision from file. The revision can be specified as a symbol or
312: * a revision number.
313: */
314: RCSNUM *
315: rcs_getrevnum(const char *rev_str, RCSFILE *file)
316: {
317: RCSNUM *rev;
318:
319: /* Search for symbol. */
320: rev = rcs_sym_getrev(file, rev_str);
321:
322: /* Search for revision number. */
323: if (rev == NULL)
324: rev = rcsnum_parse(rev_str);
325:
326: return (rev);
327: }
328:
329: /*
330: * Prompt for and store user's input in an allocated string.
331: *
332: * Returns the string's pointer.
333: */
334: char *
335: rcs_prompt(const char *prompt)
336: {
337: BUF *bp;
338: size_t len;
339: char *buf;
340:
1.5 joris 341: bp = rcs_buf_alloc(0, BUF_AUTOEXT);
1.1 xsa 342: if (isatty(STDIN_FILENO))
343: (void)fprintf(stderr, "%s", prompt);
344: if (isatty(STDIN_FILENO))
345: (void)fprintf(stderr, ">> ");
1.25 ! ray 346: clearerr(stdin);
1.1 xsa 347: while ((buf = fgetln(stdin, &len)) != NULL) {
348: /* The last line may not be EOL terminated. */
349: if (buf[0] == '.' && (len == 1 || buf[1] == '\n'))
350: break;
351: else
1.5 joris 352: rcs_buf_append(bp, buf, len);
1.1 xsa 353:
354: if (isatty(STDIN_FILENO))
355: (void)fprintf(stderr, ">> ");
356: }
1.5 joris 357: rcs_buf_putc(bp, '\0');
1.1 xsa 358:
1.5 joris 359: return (rcs_buf_release(bp));
1.1 xsa 360: }
361:
362: u_int
1.14 ray 363: rcs_rev_select(RCSFILE *file, const char *range)
1.1 xsa 364: {
365: int i;
366: u_int nrev;
367: char *ep;
368: char *lstr, *rstr;
369: struct rcs_delta *rdp;
1.5 joris 370: struct rcs_argvector *revargv, *revrange;
1.1 xsa 371: RCSNUM lnum, rnum;
372:
373: nrev = 0;
374: (void)memset(&lnum, 0, sizeof(lnum));
375: (void)memset(&rnum, 0, sizeof(rnum));
376:
377: if (range == NULL) {
378: TAILQ_FOREACH(rdp, &file->rf_delta, rd_list)
379: if (rcsnum_cmp(rdp->rd_num, file->rf_head, 0) == 0) {
380: rdp->rd_flags |= RCS_RD_SELECT;
381: return (1);
382: }
383: return (0);
384: }
385:
1.5 joris 386: revargv = rcs_strsplit(range, ",");
1.1 xsa 387: for (i = 0; revargv->argv[i] != NULL; i++) {
1.5 joris 388: revrange = rcs_strsplit(revargv->argv[i], ":");
1.1 xsa 389: if (revrange->argv[0] == NULL)
390: /* should not happen */
1.3 xsa 391: errx(1, "invalid revision range: %s", revargv->argv[i]);
1.1 xsa 392: else if (revrange->argv[1] == NULL)
393: lstr = rstr = revrange->argv[0];
394: else {
395: if (revrange->argv[2] != NULL)
1.3 xsa 396: errx(1, "invalid revision range: %s",
397: revargv->argv[i]);
1.1 xsa 398: lstr = revrange->argv[0];
399: rstr = revrange->argv[1];
400: if (strcmp(lstr, "") == 0)
401: lstr = NULL;
402: if (strcmp(rstr, "") == 0)
403: rstr = NULL;
404: }
405:
406: if (lstr == NULL)
407: lstr = RCS_HEAD_INIT;
408: if (rcsnum_aton(lstr, &ep, &lnum) == 0 || (*ep != '\0'))
1.3 xsa 409: errx(1, "invalid revision: %s", lstr);
1.1 xsa 410:
411: if (rstr != NULL) {
412: if (rcsnum_aton(rstr, &ep, &rnum) == 0 || (*ep != '\0'))
1.3 xsa 413: errx(1, "invalid revision: %s", rstr);
1.1 xsa 414: } else
415: rcsnum_cpy(file->rf_head, &rnum, 0);
416:
1.5 joris 417: rcs_argv_destroy(revrange);
1.1 xsa 418:
419: TAILQ_FOREACH(rdp, &file->rf_delta, rd_list)
420: if (rcsnum_cmp(rdp->rd_num, &lnum, 0) <= 0 &&
421: rcsnum_cmp(rdp->rd_num, &rnum, 0) >= 0 &&
422: !(rdp->rd_flags & RCS_RD_SELECT)) {
423: rdp->rd_flags |= RCS_RD_SELECT;
424: nrev++;
425: }
426: }
1.5 joris 427: rcs_argv_destroy(revargv);
1.1 xsa 428:
429: if (lnum.rn_id != NULL)
430: xfree(lnum.rn_id);
431: if (rnum.rn_id != NULL)
432: xfree(rnum.rn_id);
433:
434: return (nrev);
1.2 ray 435: }
436:
437: /*
438: * Load description from <in> to <file>.
439: * If <in> starts with a `-', <in> is taken as the description.
440: * Otherwise <in> is the name of the file containing the description.
441: * If <in> is NULL, the description is read from stdin.
1.18 ray 442: * Returns 0 on success, -1 on failure, setting errno.
1.2 ray 443: */
1.18 ray 444: int
1.2 ray 445: rcs_set_description(RCSFILE *file, const char *in)
446: {
447: BUF *bp;
448: char *content;
449: const char *prompt =
450: "enter description, terminated with single '.' or end of file:\n"
451: "NOTE: This is NOT the log message!\n";
452:
453: /* Description is in file <in>. */
454: if (in != NULL && *in != '-') {
1.18 ray 455: if ((bp = rcs_buf_load(in, BUF_AUTOEXT)) == NULL)
456: return (-1);
1.5 joris 457: rcs_buf_putc(bp, '\0');
458: content = rcs_buf_release(bp);
1.2 ray 459: /* Description is in <in>. */
460: } else if (in != NULL)
461: /* Skip leading `-'. */
462: content = xstrdup(in + 1);
463: /* Get description from stdin. */
464: else
465: content = rcs_prompt(prompt);
466:
467: rcs_desc_set(file, content);
468: xfree(content);
1.18 ray 469: return (0);
1.7 xsa 470: }
471:
472: /*
473: * Split the contents of a file into a list of lines.
474: */
475: struct rcs_lines *
1.24 niallo 476: rcs_splitlines(const u_char *data, size_t len)
1.7 xsa 477: {
1.15 niallo 478: u_char *c, *p;
1.7 xsa 479: struct rcs_lines *lines;
480: struct rcs_line *lp;
1.24 niallo 481: size_t i, tlen;
1.7 xsa 482:
483: lines = xmalloc(sizeof(*lines));
1.24 niallo 484: memset(lines, 0, sizeof(*lines));
1.7 xsa 485: TAILQ_INIT(&(lines->l_lines));
486:
487: lp = xmalloc(sizeof(*lp));
1.24 niallo 488: memset(lp, 0, sizeof(*lp));
1.7 xsa 489: TAILQ_INSERT_TAIL(&(lines->l_lines), lp, l_list);
490:
491:
1.24 niallo 492: p = c = data;
493: for (i = 0; i < len; i++) {
494: if (*p == '\n' || (i == len - 1)) {
495: tlen = p - c;
496: if (*p == '\n')
497: tlen++;
1.15 niallo 498: lp = xmalloc(sizeof(*lp));
1.24 niallo 499: lp->l_line = c;
500: lp->l_len = tlen;
1.15 niallo 501: lp->l_lineno = ++(lines->l_nblines);
502: TAILQ_INSERT_TAIL(&(lines->l_lines), lp, l_list);
503: c = p + 1;
504: }
505: p++;
1.7 xsa 506: }
507:
508: return (lines);
509: }
510:
511: void
512: rcs_freelines(struct rcs_lines *lines)
513: {
514: struct rcs_line *lp;
515:
516: while ((lp = TAILQ_FIRST(&(lines->l_lines))) != NULL) {
517: TAILQ_REMOVE(&(lines->l_lines), lp, l_list);
518: xfree(lp);
519: }
520:
521: xfree(lines);
522: }
523:
524: BUF *
1.24 niallo 525: rcs_patchfile(const u_char *data, size_t dlen, const u_char *patch, size_t plen,
1.7 xsa 526: int (*p)(struct rcs_lines *, struct rcs_lines *))
527: {
528: struct rcs_lines *dlines, *plines;
529: struct rcs_line *lp;
530: BUF *res;
531:
1.24 niallo 532: dlines = rcs_splitlines(data, dlen);
533: plines = rcs_splitlines(patch, plen);
1.7 xsa 534:
535: if (p(dlines, plines) < 0) {
536: rcs_freelines(dlines);
537: rcs_freelines(plines);
538: return (NULL);
539: }
540:
1.24 niallo 541: res = rcs_buf_alloc(1024, BUF_AUTOEXT);
1.7 xsa 542: TAILQ_FOREACH(lp, &dlines->l_lines, l_list) {
1.24 niallo 543: if (lp->l_line == NULL)
544: continue;
545: rcs_buf_append(res, lp->l_line, lp->l_len);
1.7 xsa 546: }
547:
548: rcs_freelines(dlines);
549: rcs_freelines(plines);
550: return (res);
551: }
552:
553: /*
554: * rcs_yesno()
555: *
1.23 millert 556: * Read a char from standard input, returns defc if the
557: * user enters an equivalent to defc, else whatever char
558: * was entered. Converts input to lower case.
1.7 xsa 559: */
560: int
1.23 millert 561: rcs_yesno(int defc)
1.7 xsa 562: {
563: int c, ret;
564:
565: fflush(stderr);
566: fflush(stdout);
567:
1.25 ! ray 568: clearerr(stdin);
1.23 millert 569: if (isalpha(c = getchar()))
570: c = tolower(c);
571: if (c == defc || c == '\n' || (c == EOF && feof(stdin)))
572: ret = defc;
1.7 xsa 573: else
1.23 millert 574: ret = c;
575:
576: while (c != EOF && c != '\n')
577: c = getchar();
1.7 xsa 578:
579: return (ret);
580: }
581:
582: /*
583: * rcs_strsplit()
584: *
585: * Split a string <str> of <sep>-separated values and allocate
586: * an argument vector for the values found.
587: */
588: struct rcs_argvector *
1.14 ray 589: rcs_strsplit(const char *str, const char *sep)
1.7 xsa 590: {
591: struct rcs_argvector *av;
592: size_t i = 0;
593: char **nargv;
594: char *cp, *p;
595:
596: cp = xstrdup(str);
597: av = xmalloc(sizeof(*av));
598: av->str = cp;
599: av->argv = xcalloc(i + 1, sizeof(*(av->argv)));
600:
601: while ((p = strsep(&cp, sep)) != NULL) {
602: av->argv[i++] = p;
603: nargv = xrealloc(av->argv,
604: i + 1, sizeof(*(av->argv)));
605: av->argv = nargv;
606: }
607: av->argv[i] = NULL;
608:
609: return (av);
610: }
611:
612: /*
613: * rcs_argv_destroy()
614: *
615: * Free an argument vector previously allocated by rcs_strsplit().
616: */
617: void
618: rcs_argv_destroy(struct rcs_argvector *av)
619: {
620: xfree(av->str);
621: xfree(av->argv);
622: xfree(av);
1.1 xsa 623: }
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