1 /* 2 * Copyright (c) 1988 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)field.c 5.12 (Berkeley) 06/01/90"; 10 #endif /* not lint */ 11 12 #include <sys/param.h> 13 #include <pwd.h> 14 #include <grp.h> 15 #include <string.h> 16 #include <stdio.h> 17 #include <ctype.h> 18 #include "chpass.h" 19 #include "pathnames.h" 20 21 /* ARGSUSED */ 22 p_login(p, pw, ep) 23 char *p; 24 struct passwd *pw; 25 struct entry *ep; 26 { 27 if (!*p) { 28 (void)fprintf(stderr, "chpass: empty login field.\n"); 29 return(1); 30 } 31 if (*p == '-') { 32 (void)fprintf(stderr, 33 "chpass: login names may not begin with a hyphen.\n"); 34 return(1); 35 } 36 if (!(pw->pw_name = strdup(p))) { 37 (void)fprintf(stderr, "chpass: can't save entry.\n"); 38 return(1); 39 } 40 if (index(p, '.')) 41 (void)fprintf(stderr, 42 "chpass: \'.\' is dangerous in a login name.\n"); 43 for (; *p; ++p) 44 if (isupper(*p)) { 45 (void)fprintf(stderr, 46 "chpass: upper-case letters are dangerous in a login name.\n"); 47 break; 48 } 49 return(0); 50 } 51 52 /* ARGSUSED */ 53 p_passwd(p, pw, ep) 54 char *p; 55 struct passwd *pw; 56 struct entry *ep; 57 { 58 if (!*p) 59 pw->pw_passwd = ""; /* "NOLOGIN"; */ 60 else if (!(pw->pw_passwd = strdup(p))) { 61 (void)fprintf(stderr, "chpass: can't save password entry.\n"); 62 return(1); 63 } 64 65 return(0); 66 } 67 68 /* ARGSUSED */ 69 p_uid(p, pw, ep) 70 register char *p; 71 struct passwd *pw; 72 struct entry *ep; 73 { 74 int id; 75 76 if (!*p) { 77 (void)fprintf(stderr, "chpass: empty uid field.\n"); 78 return(1); 79 } 80 if (!isdigit(*p)) { 81 (void)fprintf(stderr, "chpass: illegal uid.\n"); 82 return(1); 83 } 84 id = atoi(p); 85 if ((u_int)id > USHRT_MAX) { 86 (void)fprintf(stderr, "chpass: %d > max uid value (%d).\n", 87 id, USHRT_MAX); 88 return(1); 89 } 90 pw->pw_uid = id; 91 return(0); 92 } 93 94 /* ARGSUSED */ 95 p_gid(p, pw, ep) 96 register char *p; 97 struct passwd *pw; 98 struct entry *ep; 99 { 100 struct group *gr; 101 int id; 102 103 if (!*p) { 104 (void)fprintf(stderr, "chpass: empty gid field.\n"); 105 return(1); 106 } 107 if (!isdigit(*p)) { 108 if (!(gr = getgrnam(p))) { 109 (void)fprintf(stderr, 110 "chpass: unknown group %s.\n", p); 111 return(1); 112 } 113 pw->pw_gid = gr->gr_gid; 114 return(0); 115 } 116 id = atoi(p); 117 if ((u_int)id > USHRT_MAX) { 118 (void)fprintf(stderr, "chpass: %d > max gid value (%d).\n", 119 id, USHRT_MAX); 120 return(1); 121 } 122 pw->pw_gid = id; 123 return(0); 124 } 125 126 /* ARGSUSED */ 127 p_class(p, pw, ep) 128 char *p; 129 struct passwd *pw; 130 struct entry *ep; 131 { 132 if (!*p) 133 pw->pw_class = ""; 134 else if (!(pw->pw_class = strdup(p))) { 135 (void)fprintf(stderr, "chpass: can't save entry.\n"); 136 return(1); 137 } 138 139 return(0); 140 } 141 142 /* ARGSUSED */ 143 p_change(p, pw, ep) 144 char *p; 145 struct passwd *pw; 146 struct entry *ep; 147 { 148 if (!atot(p, &pw->pw_change)) 149 return(0); 150 (void)fprintf(stderr, "chpass: illegal date for change field.\n"); 151 return(1); 152 } 153 154 /* ARGSUSED */ 155 p_expire(p, pw, ep) 156 char *p; 157 struct passwd *pw; 158 struct entry *ep; 159 { 160 if (!atot(p, &pw->pw_expire)) 161 return(0); 162 (void)fprintf(stderr, "chpass: illegal date for expire field.\n"); 163 return(1); 164 } 165 166 /* ARGSUSED */ 167 p_gecos(p, pw, ep) 168 char *p; 169 struct passwd *pw; 170 struct entry *ep; 171 { 172 if (!*p) 173 ep->save = ""; 174 else if (!(ep->save = strdup(p))) { 175 (void)fprintf(stderr, "chpass: can't save entry.\n"); 176 return(1); 177 } 178 return(0); 179 } 180 181 /* ARGSUSED */ 182 p_hdir(p, pw, ep) 183 char *p; 184 struct passwd *pw; 185 struct entry *ep; 186 { 187 if (!*p) { 188 (void)fprintf(stderr, "chpass: empty home directory field.\n"); 189 return(1); 190 } 191 if (!(pw->pw_dir = strdup(p))) { 192 (void)fprintf(stderr, "chpass: can't save entry.\n"); 193 return(1); 194 } 195 return(0); 196 } 197 198 /* ARGSUSED */ 199 p_shell(p, pw, ep) 200 register char *p; 201 struct passwd *pw; 202 struct entry *ep; 203 { 204 char *t, *ok_shell(); 205 206 if (!*p) { 207 pw->pw_shell = _PATH_BSHELL; 208 return(0); 209 } 210 /* only admin can change from or to "restricted" shells */ 211 if (uid && pw->pw_shell && !ok_shell(pw->pw_shell)) { 212 (void)fprintf(stderr, 213 "chpass: %s: current shell non-standard.\n", pw->pw_shell); 214 return(1); 215 } 216 if (!(t = ok_shell(p))) { 217 if (uid) { 218 (void)fprintf(stderr, 219 "chpass: %s: non-standard shell.\n", p); 220 return(1); 221 } 222 } 223 else 224 p = t; 225 if (!(pw->pw_shell = strdup(p))) { 226 (void)fprintf(stderr, "chpass: can't save entry.\n"); 227 return(1); 228 } 229 return(0); 230 } 231