Annotation of src/usr.bin/chpass/chpass.c, Revision 1.12
1.12 ! millert 1: /* $OpenBSD: chpass.c,v 1.11 1998/05/29 16:37:51 millert Exp $ */
1.2 deraadt 2: /* $NetBSD: chpass.c,v 1.8 1996/05/15 21:50:43 jtc Exp $ */
1.1 deraadt 3:
4: /*-
5: * Copyright (c) 1988, 1993, 1994
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: static char copyright[] =
39: "@(#) Copyright (c) 1988, 1993, 1994\n\
40: The Regents of the University of California. All rights reserved.\n";
41: #endif /* not lint */
42:
43: #ifndef lint
44: #if 0
45: static char sccsid[] = "@(#)chpass.c 8.4 (Berkeley) 4/2/94";
46: #else
1.12 ! millert 47: static char rcsid[] = "$OpenBSD: chpass.c,v 1.11 1998/05/29 16:37:51 millert Exp $";
1.1 deraadt 48: #endif
49: #endif /* not lint */
50:
51: #include <sys/param.h>
52: #include <sys/stat.h>
53: #include <sys/time.h>
54: #include <sys/resource.h>
55:
56: #include <ctype.h>
57: #include <err.h>
58: #include <errno.h>
59: #include <fcntl.h>
60: #include <pwd.h>
61: #include <stdio.h>
62: #include <stdlib.h>
63: #include <string.h>
64: #include <unistd.h>
1.2 deraadt 65: #include <util.h>
1.1 deraadt 66:
67: #include "chpass.h"
68: #include "pathnames.h"
69:
70: char *progname = "chpass";
71: char *tempname;
72: uid_t uid;
73:
74: #ifdef YP
75: int use_yp;
76: int force_yp = 0;
77: extern struct passwd *ypgetpwnam(), *ypgetpwuid();
1.10 deraadt 78: int _yp_check __P((char **));
79: int pw_yp __P((struct passwd *, uid_t));
1.1 deraadt 80: #endif
81:
82: void baduser __P((void));
83: void usage __P((void));
84:
85: int
86: main(argc, argv)
87: int argc;
88: char **argv;
89: {
90: enum { NEWSH, LOADENTRY, EDITENTRY } op;
91: struct passwd *pw, lpw;
1.2 deraadt 92: int ch, pfd, tfd, dfd;
1.11 millert 93: char *arg, tempname[] = __CONCAT(_PATH_VARTMP,"pw.XXXXXXXX");
1.1 deraadt 94:
95: #ifdef YP
96: use_yp = _yp_check(NULL);
97: #endif
98:
99: op = EDITENTRY;
1.7 millert 100: while ((ch = getopt(argc, argv, "a:s:ly")) != -1)
1.1 deraadt 101: switch(ch) {
102: case 'a':
103: op = LOADENTRY;
104: arg = optarg;
105: break;
106: case 's':
107: op = NEWSH;
108: arg = optarg;
109: break;
110: #ifdef YP
111: case 'l':
112: use_yp = 0;
113: break;
114: case 'y':
115: if (!use_yp) {
116: warnx("YP not in use.");
117: usage();
118: }
119: force_yp = 1;
120: break;
121: #endif
122: case '?':
123: default:
124: usage();
125: }
126: argc -= optind;
127: argv += optind;
128:
129: #ifdef YP
130: if (op == LOADENTRY && use_yp)
131: errx(1, "cannot load entry using NIS.\n\tUse the -l flag to load local.");
132: #endif
133: uid = getuid();
134:
135: if (op == EDITENTRY || op == NEWSH)
136: switch(argc) {
137: case 0:
138: pw = getpwuid(uid);
139: #ifdef YP
140: if (pw && !force_yp)
141: use_yp = 0;
142: else if (use_yp)
143: pw = ypgetpwuid(uid);
144: #endif /* YP */
145: if (!pw)
146: errx(1, "unknown user: uid %u\n", uid);
147: break;
148: case 1:
149: pw = getpwnam(*argv);
150: #ifdef YP
151: if (pw && !force_yp)
152: use_yp = 0;
153: else if (use_yp)
154: pw = ypgetpwnam(*argv);
155: #endif /* YP */
156: if (!pw)
157: errx(1, "unknown user: %s", *argv);
158: if (uid && uid != pw->pw_uid)
159: baduser();
160: break;
161: default:
162: usage();
163: }
164:
165: if (op == NEWSH) {
166: /* protect p_shell -- it thinks NULL is /bin/sh */
167: if (!arg[0])
168: usage();
1.9 kstailey 169: if (p_shell(arg, pw, NULL))
170: pw_error(NULL, 0, 1);
1.1 deraadt 171: }
172:
173: if (op == LOADENTRY) {
174: if (uid)
175: baduser();
176: pw = &lpw;
1.9 kstailey 177: if (!pw_scan(arg, pw, NULL))
1.1 deraadt 178: exit(1);
179: }
180:
1.2 deraadt 181: /* Get the passwd lock file and open the passwd file for reading. */
1.1 deraadt 182: pw_init();
1.2 deraadt 183: tfd = pw_lock(0);
1.12 ! millert 184: if (tfd == -1 || fcntl(tfd, F_SETFD, 1) == -1) {
1.6 millert 185: if (errno == EEXIST)
186: errx(1, "the passwd file is busy.");
187: else
188: err(1, "can't open passwd temp file");
189: }
1.2 deraadt 190: pfd = open(_PATH_MASTERPASSWD, O_RDONLY, 0);
1.12 ! millert 191: if (pfd == -1 || fcntl(pfd, F_SETFD, 1) == -1)
1.2 deraadt 192: pw_error(_PATH_MASTERPASSWD, 1, 1);
1.1 deraadt 193:
1.2 deraadt 194: /* Edit the user passwd information if requested. */
1.1 deraadt 195: if (op == EDITENTRY) {
1.2 deraadt 196: dfd = mkstemp(tempname);
1.12 ! millert 197: if (dfd == -1 || fcntl(dfd, F_SETFD, 1) == -1)
1.2 deraadt 198: pw_error(tempname, 1, 1);
199: display(tempname, dfd, pw);
200: edit(tempname, pw);
1.1 deraadt 201: (void)unlink(tempname);
202: }
1.2 deraadt 203:
1.1 deraadt 204: #ifdef YP
205: if (use_yp) {
1.4 deraadt 206: if (pw_yp(pw, uid)) {
1.9 kstailey 207: pw_error(NULL, 0, 1);
1.4 deraadt 208: exit(1);
1.5 deraadt 209: } else {
210: pw_abort();
1.1 deraadt 211: exit(0);
1.5 deraadt 212: }
1.4 deraadt 213: } else
1.1 deraadt 214: #endif /* YP */
1.8 deraadt 215: {
216: /* Copy the passwd file to the lock file, updating pw. */
217: pw_copy(pfd, tfd, pw);
1.2 deraadt 218:
1.8 deraadt 219: /* Now finish the passwd file update. */
1.12 ! millert 220: if (pw_mkdb() == -1)
1.9 kstailey 221: pw_error(NULL, 0, 1);
1.8 deraadt 222: }
1.1 deraadt 223:
224: exit(0);
225: }
226:
227: void
228: baduser()
229: {
230:
231: errx(1, "%s", strerror(EACCES));
232: }
233:
234: void
235: usage()
236: {
237:
238: #ifdef YP
239: (void)fprintf(stderr, "usage: chpass [-a list] [-s shell] [-l]%s [user]\n", use_yp?" [-y]":"");
240: #else
241: (void)fprintf(stderr, "usage: chpass [-a list] [-s shell] [user]\n");
242: #endif
243: exit(1);
244: }
![[BACK]](/icons/back.gif){kind=icon}
Return to chpass.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / chpass