/* $OpenBSD: chpass.c,v 1.8 1997/02/13 17:28:39 deraadt Exp $ */ /* $NetBSD: chpass.c,v 1.8 1996/05/15 21:50:43 jtc Exp $ */ /*- * Copyright (c) 1988, 1993, 1994 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char copyright[] = "@(#) Copyright (c) 1988, 1993, 1994\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)chpass.c 8.4 (Berkeley) 4/2/94"; #else static char rcsid[] = "$OpenBSD: chpass.c,v 1.8 1997/02/13 17:28:39 deraadt Exp $"; #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "chpass.h" #include "pathnames.h" char *progname = "chpass"; char *tempname; uid_t uid; #ifdef YP int use_yp; int force_yp = 0; extern struct passwd *ypgetpwnam(), *ypgetpwuid(); #endif void baduser __P((void)); void usage __P((void)); int main(argc, argv) int argc; char **argv; { enum { NEWSH, LOADENTRY, EDITENTRY } op; struct passwd *pw, lpw; int ch, pfd, tfd, dfd; char *arg, tempname[] = "/etc/pw.XXXXXX"; #ifdef YP use_yp = _yp_check(NULL); #endif op = EDITENTRY; while ((ch = getopt(argc, argv, "a:s:ly")) != -1) switch(ch) { case 'a': op = LOADENTRY; arg = optarg; break; case 's': op = NEWSH; arg = optarg; break; #ifdef YP case 'l': use_yp = 0; break; case 'y': if (!use_yp) { warnx("YP not in use."); usage(); } force_yp = 1; break; #endif case '?': default: usage(); } argc -= optind; argv += optind; #ifdef YP if (op == LOADENTRY && use_yp) errx(1, "cannot load entry using NIS.\n\tUse the -l flag to load local."); #endif uid = getuid(); if (op == EDITENTRY || op == NEWSH) switch(argc) { case 0: pw = getpwuid(uid); #ifdef YP if (pw && !force_yp) use_yp = 0; else if (use_yp) pw = ypgetpwuid(uid); #endif /* YP */ if (!pw) errx(1, "unknown user: uid %u\n", uid); break; case 1: pw = getpwnam(*argv); #ifdef YP if (pw && !force_yp) use_yp = 0; else if (use_yp) pw = ypgetpwnam(*argv); #endif /* YP */ if (!pw) errx(1, "unknown user: %s", *argv); if (uid && uid != pw->pw_uid) baduser(); break; default: usage(); } if (op == NEWSH) { /* protect p_shell -- it thinks NULL is /bin/sh */ if (!arg[0]) usage(); if (p_shell(arg, pw, (ENTRY *)NULL)) pw_error((char *)NULL, 0, 1); } if (op == LOADENTRY) { if (uid) baduser(); pw = &lpw; if (!pw_scan(arg, pw, (int *)NULL)) exit(1); } /* Get the passwd lock file and open the passwd file for reading. */ pw_init(); tfd = pw_lock(0); if (tfd < 0) { if (errno == EEXIST) errx(1, "the passwd file is busy."); else err(1, "can't open passwd temp file"); } pfd = open(_PATH_MASTERPASSWD, O_RDONLY, 0); if (pfd < 0) pw_error(_PATH_MASTERPASSWD, 1, 1); /* Edit the user passwd information if requested. */ if (op == EDITENTRY) { dfd = mkstemp(tempname); if (dfd < 0) pw_error(tempname, 1, 1); display(tempname, dfd, pw); edit(tempname, pw); (void)unlink(tempname); } #ifdef YP if (use_yp) { if (pw_yp(pw, uid)) { pw_error((char *)NULL, 0, 1); exit(1); } else { pw_abort(); exit(0); } } else #endif /* YP */ { /* Copy the passwd file to the lock file, updating pw. */ pw_copy(pfd, tfd, pw); /* Now finish the passwd file update. */ if (pw_mkdb() < 0) pw_error((char *)NULL, 0, 1); } exit(0); } void baduser() { errx(1, "%s", strerror(EACCES)); } void usage() { #ifdef YP (void)fprintf(stderr, "usage: chpass [-a list] [-s shell] [-l]%s [user]\n", use_yp?" [-y]":""); #else (void)fprintf(stderr, "usage: chpass [-a list] [-s shell] [user]\n"); #endif exit(1); }