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33 * @(#)pw_util.c 8.3 (Berkeley) 4/2/94
34 * $FreeBSD: src/usr.sbin/vipw/pw_util.c,v 1.17.2.4 2002/09/04 15:28:10 des Exp $
35 * $DragonFly: src/usr.sbin/vipw/pw_util.c,v 1.3 2004/12/18 22:48:14 swildner Exp $
39 * This file is used by all the "password" programs; vipw(8), chpass(1),
43 #include <sys/param.h>
44 #include <sys/errno.h>
46 #include <sys/resource.h>
62 extern char *tempname;
63 static pid_t editpid = -1;
65 char *mppath = _PATH_PWD;
66 char *masterpasswd = _PATH_MASTERPASSWD;
82 /* Unlimited resource limits. */
83 rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY;
84 setrlimit(RLIMIT_CPU, &rlim);
85 setrlimit(RLIMIT_FSIZE, &rlim);
86 setrlimit(RLIMIT_STACK, &rlim);
87 setrlimit(RLIMIT_DATA, &rlim);
88 setrlimit(RLIMIT_RSS, &rlim);
90 /* Don't drop core (not really necessary, but GP's). */
91 rlim.rlim_cur = rlim.rlim_max = 0;
92 setrlimit(RLIMIT_CORE, &rlim);
94 /* Turn off signals. */
95 signal(SIGALRM, SIG_IGN);
96 signal(SIGHUP, SIG_IGN);
97 signal(SIGINT, SIG_IGN);
98 signal(SIGPIPE, SIG_IGN);
99 signal(SIGQUIT, SIG_IGN);
100 signal(SIGTERM, SIG_IGN);
101 signal(SIGCONT, pw_cont);
103 /* Create with exact permissions. */
111 * If the master password file doesn't exist, the system is hosed.
112 * Might as well try to build one. Set the close-on-exec bit so
113 * that users can't get at the encrypted passwords while editing.
114 * Open should allow flock'ing the file; see 4.4BSD. XXX
119 lockfd = open(masterpasswd, O_RDONLY, 0);
120 if (lockfd < 0 || fcntl(lockfd, F_SETFD, 1) == -1)
121 err(1, "%s", masterpasswd);
122 if (flock(lockfd, LOCK_EX|LOCK_NB))
123 errx(1, "the password db file is busy");
126 * If the password file was replaced while we were trying to
127 * get the lock, our hardlink count will be 0 and we have to
130 if (fstat(lockfd, &st) < 0)
131 errx(1, "fstat() failed");
132 if (st.st_nlink != 0)
143 static char path[MAXPATHLEN];
147 if ((p = strrchr(masterpasswd, '/')) == NULL)
148 strcpy(path, "pw.XXXXXX");
150 if (snprintf(path, sizeof path, "%.*s/pw.XXXXXX",
151 (int)(p - masterpasswd), masterpasswd) >= sizeof path)
152 errx(1, "%s: path too long", masterpasswd);
153 if ((fd = mkstemp(path)) == -1)
167 if (!(pid = fork())) {
169 warnx("rebuilding the database...");
170 execl(_PATH_PWD_MKDB, "pwd_mkdb", "-p", "-d", mppath,
173 warnx("updating the database...");
174 execl(_PATH_PWD_MKDB, "pwd_mkdb", "-p", "-d", mppath,
175 "-u", username, tempname, NULL);
177 pw_error(_PATH_PWD_MKDB, 1, 1);
179 pid = waitpid(pid, &pstat, 0);
180 if (pid == -1 || !WIFEXITED(pstat) || WEXITSTATUS(pstat) != 0)
193 if (!(editor = getenv("EDITOR")))
195 if ((p = strrchr(editor, '/')))
200 if (!(editpid = fork())) {
206 execlp(editor, p, tempname, NULL);
210 editpid = waitpid(editpid, (int *)&pstat, WUNTRACED);
211 errno = WEXITSTATUS(pstat);
213 pw_error(editor, 1, 1);
214 else if (WIFSTOPPED(pstat))
215 raise(WSTOPSIG(pstat));
216 else if (WIFEXITED(pstat) && errno == 0)
219 pw_error(editor, 1, 1);
229 printf("re-edit the password file? [y]: ");
231 first = c = getchar();
232 while (c != '\n' && c != EOF)
235 pw_error(NULL, 0, 0);
239 pw_error(name, err, eval)
254 warnx("NIS information unchanged");
257 warnx("%s: unchanged", masterpasswd);