1 /*-
2 * Copyright (c) 1990, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 */
7
8 #ifndef lint
9 static char sccsid[] = "@(#)pw_copy.c 8.4 (Berkeley) 04/02/94";
10 #endif /* not lint */
11
12 /*
13 * This module is used to copy the master password file, replacing a single
14 * record, by chpass(1) and passwd(1).
15 */
16
17 #include <err.h>
18 #include <pwd.h>
19 #include <stdio.h>
20 #include <string.h>
21
22 #include <pw_util.h>
23 #include "pw_copy.h"
24
25 extern char *tempname;
26
27 void
pw_copy(ffd,tfd,pw)28 pw_copy(ffd, tfd, pw)
29 int ffd, tfd;
30 struct passwd *pw;
31 {
32 FILE *from, *to;
33 int done;
34 char *p, buf[8192];
35
36 if (!(from = fdopen(ffd, "r")))
37 pw_error(_PATH_MASTERPASSWD, 1, 1);
38 if (!(to = fdopen(tfd, "w")))
39 pw_error(tempname, 1, 1);
40
41 for (done = 0; fgets(buf, sizeof(buf), from);) {
42 if (!strchr(buf, '\n')) {
43 warnx("%s: line too long", _PATH_MASTERPASSWD);
44 pw_error(NULL, 0, 1);
45 }
46 if (done) {
47 (void)fprintf(to, "%s", buf);
48 if (ferror(to))
49 goto err;
50 continue;
51 }
52 if (!(p = strchr(buf, ':'))) {
53 warnx("%s: corrupted entry", _PATH_MASTERPASSWD);
54 pw_error(NULL, 0, 1);
55 }
56 *p = '\0';
57 if (strcmp(buf, pw->pw_name)) {
58 *p = ':';
59 (void)fprintf(to, "%s", buf);
60 if (ferror(to))
61 goto err;
62 continue;
63 }
64 (void)fprintf(to, "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n",
65 pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid,
66 pw->pw_class, pw->pw_change, pw->pw_expire, pw->pw_gecos,
67 pw->pw_dir, pw->pw_shell);
68 done = 1;
69 if (ferror(to))
70 goto err;
71 }
72 if (!done)
73 (void)fprintf(to, "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n",
74 pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid,
75 pw->pw_class, pw->pw_change, pw->pw_expire, pw->pw_gecos,
76 pw->pw_dir, pw->pw_shell);
77
78 if (ferror(to))
79 err: pw_error(NULL, 1, 1);
80 (void)fclose(to);
81 }
82