cvs.c revision 1.99 
1/*	$OpenBSD: cvs.c,v 1.99 2006/05/27 18:04:46 joris Exp $	*/
2/*
3 * Copyright (c) 2006 Joris Vink <joris@openbsd.org>
4 * Copyright (c) 2004 Jean-Francois Brousseau <jfb@openbsd.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. The name of the author may not be used to endorse or promote products
14 *    derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
17 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
18 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
19 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include "includes.h"
29
30#include "cvs.h"
31#include "config.h"
32#include "log.h"
33#include "file.h"
34
35extern char *__progname;
36
37/* verbosity level: 0 = really quiet, 1 = quiet, 2 = verbose */
38int verbosity = 2;
39
40/* compression level used with zlib, 0 meaning no compression taking place */
41int	cvs_compress = 0;
42int	cvs_readrc = 1;		/* read .cvsrc on startup */
43int	cvs_trace = 0;
44int	cvs_nolog = 0;
45int	cvs_readonly = 0;
46int	cvs_nocase = 0;	/* set to 1 to disable filename case sensitivity */
47int	cvs_noexec = 0;	/* set to 1 to disable disk operations (-n option) */
48int	cvs_error = -1;	/* set to the correct error code on failure */
49int	cvs_cmdop;
50int	cvs_umask = CVS_UMASK_DEFAULT;
51
52char	*cvs_tagname = NULL;
53char	*cvs_defargs;		/* default global arguments from .cvsrc */
54char	*cvs_command;		/* name of the command we are running */
55char	*cvs_rootstr;
56char	*cvs_rsh = CVS_RSH_DEFAULT;
57char	*cvs_editor = CVS_EDITOR_DEFAULT;
58char	*cvs_homedir = NULL;
59char	*cvs_msg = NULL;
60char	*cvs_repo_base = NULL;
61char	*cvs_tmpdir = CVS_TMPDIR_DEFAULT;
62
63struct cvsroot *current_cvsroot = NULL;
64
65static TAILQ_HEAD(, cvs_var) cvs_variables;
66
67int		cvs_getopt(int, char **);
68void		usage(void);
69static void	cvs_read_rcfile(void);
70
71struct cvs_wklhead temp_files;
72
73void sighandler(int);
74volatile sig_atomic_t cvs_quit = 0;
75volatile sig_atomic_t sig_received = 0;
76
77void
78sighandler(int sig)
79{
80	sig_received = sig;
81
82	switch (sig) {
83	case SIGINT:
84	case SIGTERM:
85		cvs_quit = 1;
86		break;
87	default:
88		break;
89	}
90}
91
92void
93cvs_cleanup(void)
94{
95	cvs_log(LP_TRACE, "cvs_cleanup: removing locks");
96	cvs_worklist_run(&repo_locks, cvs_worklist_unlink);
97
98	cvs_log(LP_TRACE, "cvs_cleanup: removing temp files");
99	cvs_worklist_run(&temp_files, cvs_worklist_unlink);
100}
101
102void
103usage(void)
104{
105	fprintf(stderr,
106	    "Usage: %s [-flnQqrtvw] [-d root] [-e editor] [-s var=val] "
107	    "[-T tmpdir] [-z level] command [...]\n", __progname);
108}
109
110int
111main(int argc, char **argv)
112{
113	char *envstr, *cmd_argv[CVS_CMD_MAXARG], **targv;
114	int i, ret, cmd_argc;
115	struct cvs_cmd *cmdp;
116	struct passwd *pw;
117	struct stat st;
118
119	tzset();
120
121	TAILQ_INIT(&cvs_variables);
122	SLIST_INIT(&repo_locks);
123	SLIST_INIT(&temp_files);
124
125	/* check environment so command-line options override it */
126	if ((envstr = getenv("CVS_RSH")) != NULL)
127		cvs_rsh = envstr;
128
129	if (((envstr = getenv("CVSEDITOR")) != NULL) ||
130	    ((envstr = getenv("VISUAL")) != NULL) ||
131	    ((envstr = getenv("EDITOR")) != NULL))
132		cvs_editor = envstr;
133
134	if ((envstr = getenv("CVSREAD")) != NULL)
135		cvs_readonly = 1;
136
137	if ((cvs_homedir = getenv("HOME")) == NULL) {
138		if ((pw = getpwuid(getuid())) == NULL)
139			fatal("getpwuid failed");
140		cvs_homedir = pw->pw_dir;
141	}
142
143	if ((envstr = getenv("TMPDIR")) != NULL)
144		cvs_tmpdir = envstr;
145
146	ret = cvs_getopt(argc, argv);
147
148	argc -= ret;
149	argv += ret;
150	if (argc == 0) {
151		usage();
152		exit(1);
153	}
154
155	cvs_command = argv[0];
156
157	/*
158	 * check the tmp dir, either specified through
159	 * the environment variable TMPDIR, or via
160	 * the global option -T <dir>
161	 */
162	if (stat(cvs_tmpdir, &st) == -1)
163		fatal("stat failed on `%s': %s", cvs_tmpdir, strerror(errno));
164	else if (!S_ISDIR(st.st_mode))
165		fatal("`%s' is not valid temporary directory", cvs_tmpdir);
166
167	if (cvs_readrc == 1) {
168		cvs_read_rcfile();
169
170		if (cvs_defargs != NULL) {
171			if ((targv = cvs_makeargv(cvs_defargs, &i)) == NULL)
172				fatal("failed to load default arguments to %s",
173				    __progname);
174
175			cvs_getopt(i, targv);
176			cvs_freeargv(targv, i);
177			xfree(targv);
178		}
179	}
180
181	/* setup signal handlers */
182	signal(SIGTERM, sighandler);
183	signal(SIGINT, sighandler);
184	signal(SIGHUP, sighandler);
185	signal(SIGABRT, sighandler);
186	signal(SIGALRM, sighandler);
187	signal(SIGPIPE, sighandler);
188
189	cmdp = cvs_findcmd(cvs_command);
190	if (cmdp == NULL) {
191		fprintf(stderr, "Unknown command: `%s'\n\n", cvs_command);
192		fprintf(stderr, "CVS commands are:\n");
193		for (i = 0; cvs_cdt[i] != NULL; i++)
194			fprintf(stderr, "\t%-16s%s\n",
195			    cvs_cdt[i]->cmd_name, cvs_cdt[i]->cmd_descr);
196		exit(1);
197	}
198
199	cvs_cmdop = cmdp->cmd_op;
200
201	cmd_argc = 0;
202	memset(cmd_argv, 0, sizeof(cmd_argv));
203
204	cmd_argv[cmd_argc++] = argv[0];
205	if (cmdp->cmd_defargs != NULL) {
206		/* transform into a new argument vector */
207		ret = cvs_getargv(cmdp->cmd_defargs, cmd_argv + 1,
208		    CVS_CMD_MAXARG - 1);
209		if (ret < 0)
210			fatal("main: cvs_getargv failed");
211
212		cmd_argc += ret;
213	}
214
215	for (ret = 1; ret < argc; ret++)
216		cmd_argv[cmd_argc++] = argv[ret];
217
218	cvs_file_init();
219
220	if ((current_cvsroot = cvsroot_get(".")) == NULL) {
221		cvs_log(LP_ERR,
222		    "No CVSROOT specified! Please use the '-d' option");
223		fatal("or set the CVSROOT enviroment variable.");
224	}
225
226	if (current_cvsroot->cr_method != CVS_METHOD_LOCAL)
227		fatal("remote setups are not supported yet");
228
229	cvs_parse_configfile();
230
231	umask(cvs_umask);
232
233	cmdp->cmd(cmd_argc, cmd_argv);
234	cvs_cleanup();
235
236	return (0);
237}
238
239int
240cvs_getopt(int argc, char **argv)
241{
242	int ret;
243	char *ep;
244
245	while ((ret = getopt(argc, argv, "b:d:e:fHlnQqrs:T:tvwz:")) != -1) {
246		switch (ret) {
247		case 'b':
248			/*
249			 * We do not care about the bin directory for RCS files
250			 * as this program has no dependencies on RCS programs,
251			 * so it is only here for backwards compatibility.
252			 */
253			cvs_log(LP_NOTICE, "the -b argument is obsolete");
254			break;
255		case 'd':
256			cvs_rootstr = optarg;
257			break;
258		case 'e':
259			cvs_editor = optarg;
260			break;
261		case 'f':
262			cvs_readrc = 0;
263			break;
264		case 'l':
265			cvs_nolog = 1;
266			break;
267		case 'n':
268			cvs_noexec = 1;
269			break;
270		case 'Q':
271			verbosity = 0;
272			break;
273		case 'q':
274			/* don't override -Q */
275			if (verbosity > 1)
276				verbosity = 1;
277			break;
278		case 'r':
279			cvs_readonly = 1;
280			break;
281		case 's':
282			ep = strchr(optarg, '=');
283			if (ep == NULL) {
284				cvs_log(LP_ERR, "no = in variable assignment");
285				exit(1);
286			}
287			*(ep++) = '\0';
288			if (cvs_var_set(optarg, ep) < 0)
289				exit(1);
290			break;
291		case 'T':
292			cvs_tmpdir = optarg;
293			break;
294		case 't':
295			cvs_trace = 1;
296			break;
297		case 'v':
298			printf("%s\n", CVS_VERSION);
299			exit(0);
300			/* NOTREACHED */
301			break;
302		case 'w':
303			cvs_readonly = 0;
304			break;
305		case 'x':
306			/*
307			 * Kerberos encryption support, kept for compatibility
308			 */
309			break;
310		case 'z':
311			cvs_compress = (int)strtol(optarg, &ep, 10);
312			if (*ep != '\0')
313				fatal("error parsing compression level");
314			if (cvs_compress < 0 || cvs_compress > 9)
315				fatal("gzip compression level must be "
316				    "between 0 and 9");
317			break;
318		default:
319			usage();
320			exit(1);
321		}
322	}
323
324	ret = optind;
325	optind = 1;
326	optreset = 1;	/* for next call */
327
328	return (ret);
329}
330
331/*
332 * cvs_read_rcfile()
333 *
334 * Read the CVS `.cvsrc' file in the user's home directory.  If the file
335 * exists, it should contain a list of arguments that should always be given
336 * implicitly to the specified commands.
337 */
338static void
339cvs_read_rcfile(void)
340{
341	char rcpath[MAXPATHLEN], linebuf[128], *lp, *p;
342	int linenum = 0;
343	size_t len;
344	struct cvs_cmd *cmdp;
345	FILE *fp;
346
347	if (strlcpy(rcpath, cvs_homedir, sizeof(rcpath)) >= sizeof(rcpath) ||
348	    strlcat(rcpath, "/", sizeof(rcpath)) >= sizeof(rcpath) ||
349	    strlcat(rcpath, CVS_PATH_RC, sizeof(rcpath)) >= sizeof(rcpath)) {
350		errno = ENAMETOOLONG;
351		cvs_log(LP_ERR, "%s", rcpath);
352		return;
353	}
354
355	fp = fopen(rcpath, "r");
356	if (fp == NULL) {
357		if (errno != ENOENT)
358			cvs_log(LP_NOTICE, "failed to open `%s': %s", rcpath,
359			    strerror(errno));
360		return;
361	}
362
363	while (fgets(linebuf, (int)sizeof(linebuf), fp) != NULL) {
364		linenum++;
365		if ((len = strlen(linebuf)) == 0)
366			continue;
367		if (linebuf[len - 1] != '\n') {
368			cvs_log(LP_ERR, "line too long in `%s:%d'", rcpath,
369				linenum);
370			break;
371		}
372		linebuf[--len] = '\0';
373
374		/* skip any whitespaces */
375		p = linebuf;
376		while (*p == ' ')
377			p++;
378
379		/* allow comments */
380		if (*p == '#')
381			continue;
382
383		lp = strchr(p, ' ');
384		if (lp == NULL)
385			continue;	/* ignore lines with no arguments */
386		*lp = '\0';
387		if (strcmp(p, "cvs") == 0) {
388			/*
389			 * Global default options.  In the case of cvs only,
390			 * we keep the 'cvs' string as first argument because
391			 * getopt() does not like starting at index 0 for
392			 * argument processing.
393			 */
394			*lp = ' ';
395			cvs_defargs = xstrdup(p);
396		} else {
397			lp++;
398			cmdp = cvs_findcmd(p);
399			if (cmdp == NULL) {
400				cvs_log(LP_NOTICE,
401				    "unknown command `%s' in `%s:%d'",
402				    p, rcpath, linenum);
403				continue;
404			}
405
406			cmdp->cmd_defargs = xstrdup(lp);
407		}
408	}
409
410	if (ferror(fp)) {
411		cvs_log(LP_NOTICE, "failed to read line from `%s'", rcpath);
412	}
413
414	(void)fclose(fp);
415}
416
417/*
418 * cvs_var_set()
419 *
420 * Set the value of the variable <var> to <val>.  If there is no such variable,
421 * a new entry is created, otherwise the old value is overwritten.
422 * Returns 0 on success, or -1 on failure.
423 */
424int
425cvs_var_set(const char *var, const char *val)
426{
427	char *valcp;
428	const char *cp;
429	struct cvs_var *vp;
430
431	if (var == NULL || *var == '\0') {
432		cvs_log(LP_ERR, "no variable name");
433		return (-1);
434	}
435
436	/* sanity check on the name */
437	for (cp = var; *cp != '\0'; cp++)
438		if (!isalnum(*cp) && (*cp != '_')) {
439			cvs_log(LP_ERR,
440			    "variable name `%s' contains invalid characters",
441			    var);
442			return (-1);
443		}
444
445	TAILQ_FOREACH(vp, &cvs_variables, cv_link)
446		if (strcmp(vp->cv_name, var) == 0)
447			break;
448
449	valcp = xstrdup(val);
450	if (vp == NULL) {
451		vp = xcalloc(1, sizeof(*vp));
452
453		vp->cv_name = xstrdup(var);
454		TAILQ_INSERT_TAIL(&cvs_variables, vp, cv_link);
455
456	} else	/* free the previous value */
457		xfree(vp->cv_val);
458
459	vp->cv_val = valcp;
460
461	return (0);
462}
463
464/*
465 * cvs_var_set()
466 *
467 * Remove any entry for the variable <var>.
468 * Returns 0 on success, or -1 on failure.
469 */
470int
471cvs_var_unset(const char *var)
472{
473	struct cvs_var *vp;
474
475	TAILQ_FOREACH(vp, &cvs_variables, cv_link)
476		if (strcmp(vp->cv_name, var) == 0) {
477			TAILQ_REMOVE(&cvs_variables, vp, cv_link);
478			xfree(vp->cv_name);
479			xfree(vp->cv_val);
480			xfree(vp);
481			return (0);
482		}
483
484	return (-1);
485}
486
487/*
488 * cvs_var_get()
489 *
490 * Get the value associated with the variable <var>.  Returns a pointer to the
491 * value string on success, or NULL if the variable does not exist.
492 */
493
494const char *
495cvs_var_get(const char *var)
496{
497	struct cvs_var *vp;
498
499	TAILQ_FOREACH(vp, &cvs_variables, cv_link)
500		if (strcmp(vp->cv_name, var) == 0)
501			return (vp->cv_val);
502
503	return (NULL);
504}
505