| 1 | /*- |
| 2 | * Copyright (c) 1990, 1993 |
| 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[] = "@(#)edit.c 8.2 (Berkeley) %G%"; |
| 10 | #endif /* not lint */ |
| 11 | |
| 12 | #include <sys/param.h> |
| 13 | #include <sys/stat.h> |
| 14 | |
| 15 | #include <ctype.h> |
| 16 | #include <err.h> |
| 17 | #include <errno.h> |
| 18 | #include <paths.h> |
| 19 | #include <pwd.h> |
| 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <string.h> |
| 23 | #include <unistd.h> |
| 24 | |
| 25 | #include <pw_scan.h> |
| 26 | #include <pw_util.h> |
| 27 | |
| 28 | #include "chpass.h" |
| 29 | |
| 30 | extern char *tempname; |
| 31 | |
| 32 | void |
| 33 | edit(pw) |
| 34 | struct passwd *pw; |
| 35 | { |
| 36 | struct stat begin, end; |
| 37 | |
| 38 | for (;;) { |
| 39 | if (stat(tempname, &begin)) |
| 40 | pw_error(tempname, 1, 1); |
| 41 | pw_edit(1); |
| 42 | if (stat(tempname, &end)) |
| 43 | pw_error(tempname, 1, 1); |
| 44 | if (begin.st_mtime == end.st_mtime) { |
| 45 | warnx("no changes made"); |
| 46 | pw_error(NULL, 0, 0); |
| 47 | } |
| 48 | if (verify(pw)) |
| 49 | break; |
| 50 | pw_prompt(); |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | /* |
| 55 | * display -- |
| 56 | * print out the file for the user to edit; strange side-effect: |
| 57 | * set conditional flag if the user gets to edit the shell. |
| 58 | */ |
| 59 | void |
| 60 | display(fd, pw) |
| 61 | int fd; |
| 62 | struct passwd *pw; |
| 63 | { |
| 64 | FILE *fp; |
| 65 | char *bp, *p, *ttoa(); |
| 66 | |
| 67 | if (!(fp = fdopen(fd, "w"))) |
| 68 | pw_error(tempname, 1, 1); |
| 69 | |
| 70 | (void)fprintf(fp, |
| 71 | "#Changing user database information for %s.\n", pw->pw_name); |
| 72 | if (!uid) { |
| 73 | (void)fprintf(fp, "Login: %s\n", pw->pw_name); |
| 74 | (void)fprintf(fp, "Password: %s\n", pw->pw_passwd); |
| 75 | (void)fprintf(fp, "Uid [#]: %d\n", pw->pw_uid); |
| 76 | (void)fprintf(fp, "Gid [# or name]: %d\n", pw->pw_gid); |
| 77 | (void)fprintf(fp, "Change [month day year]: %s\n", |
| 78 | ttoa(pw->pw_change)); |
| 79 | (void)fprintf(fp, "Expire [month day year]: %s\n", |
| 80 | ttoa(pw->pw_expire)); |
| 81 | (void)fprintf(fp, "Class: %s\n", pw->pw_class); |
| 82 | (void)fprintf(fp, "Home directory: %s\n", pw->pw_dir); |
| 83 | (void)fprintf(fp, "Shell: %s\n", |
| 84 | *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL); |
| 85 | } |
| 86 | /* Only admin can change "restricted" shells. */ |
| 87 | else if (ok_shell(pw->pw_shell)) |
| 88 | /* |
| 89 | * Make shell a restricted field. Ugly with a |
| 90 | * necklace, but there's not much else to do. |
| 91 | */ |
| 92 | (void)fprintf(fp, "Shell: %s\n", |
| 93 | *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL); |
| 94 | else |
| 95 | list[E_SHELL].restricted = 1; |
| 96 | bp = pw->pw_gecos; |
| 97 | p = strsep(&bp, ","); |
| 98 | (void)fprintf(fp, "Full Name: %s\n", p ? p : ""); |
| 99 | p = strsep(&bp, ","); |
| 100 | (void)fprintf(fp, "Location: %s\n", p ? p : ""); |
| 101 | p = strsep(&bp, ","); |
| 102 | (void)fprintf(fp, "Office Phone: %s\n", p ? p : ""); |
| 103 | p = strsep(&bp, ","); |
| 104 | (void)fprintf(fp, "Home Phone: %s\n", p ? p : ""); |
| 105 | |
| 106 | (void)fchown(fd, getuid(), getgid()); |
| 107 | (void)fclose(fp); |
| 108 | } |
| 109 | |
| 110 | int |
| 111 | verify(pw) |
| 112 | struct passwd *pw; |
| 113 | { |
| 114 | ENTRY *ep; |
| 115 | char *p; |
| 116 | struct stat sb; |
| 117 | FILE *fp; |
| 118 | int len; |
| 119 | char buf[LINE_MAX]; |
| 120 | |
| 121 | if (!(fp = fopen(tempname, "r"))) |
| 122 | pw_error(tempname, 1, 1); |
| 123 | if (fstat(fileno(fp), &sb)) |
| 124 | pw_error(tempname, 1, 1); |
| 125 | if (sb.st_size == 0) { |
| 126 | warnx("corrupted temporary file"); |
| 127 | goto bad; |
| 128 | } |
| 129 | while (fgets(buf, sizeof(buf), fp)) { |
| 130 | if (!buf[0] || buf[0] == '#') |
| 131 | continue; |
| 132 | if (!(p = strchr(buf, '\n'))) { |
| 133 | warnx("line too long"); |
| 134 | goto bad; |
| 135 | } |
| 136 | *p = '\0'; |
| 137 | for (ep = list;; ++ep) { |
| 138 | if (!ep->prompt) { |
| 139 | warnx("unrecognized field"); |
| 140 | goto bad; |
| 141 | } |
| 142 | if (!strncasecmp(buf, ep->prompt, ep->len)) { |
| 143 | if (ep->restricted && uid) { |
| 144 | warnx( |
| 145 | "you may not change the %s field", |
| 146 | ep->prompt); |
| 147 | goto bad; |
| 148 | } |
| 149 | if (!(p = strchr(buf, ':'))) { |
| 150 | warnx("line corrupted"); |
| 151 | goto bad; |
| 152 | } |
| 153 | while (isspace(*++p)); |
| 154 | if (ep->except && strpbrk(p, ep->except)) { |
| 155 | warnx( |
| 156 | "illegal character in the \"%s\" field", |
| 157 | ep->prompt); |
| 158 | goto bad; |
| 159 | } |
| 160 | if ((ep->func)(p, pw, ep)) { |
| 161 | bad: (void)fclose(fp); |
| 162 | return (0); |
| 163 | } |
| 164 | break; |
| 165 | } |
| 166 | } |
| 167 | } |
| 168 | (void)fclose(fp); |
| 169 | |
| 170 | /* Build the gecos field. */ |
| 171 | len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) + |
| 172 | strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) + 4; |
| 173 | if (!(p = malloc(len))) |
| 174 | err(1, NULL); |
| 175 | (void)sprintf(pw->pw_gecos = p, "%s,%s,%s,%s", list[E_NAME].save, |
| 176 | list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save); |
| 177 | |
| 178 | if (snprintf(buf, sizeof(buf), |
| 179 | "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s", |
| 180 | pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class, |
| 181 | pw->pw_change, pw->pw_expire, pw->pw_gecos, pw->pw_dir, |
| 182 | pw->pw_shell) >= sizeof(buf)) { |
| 183 | warnx("entries too long"); |
| 184 | return (0); |
| 185 | } |
| 186 | return (pw_scan(buf, pw)); |
| 187 | } |