usr/src/lib/libadm/common/ckuid.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  23 /*        All Rights Reserved   */
  24
  25
  26 /*
  27  * Copyright (c) 1997, by Sun Microsystems, Inc.
  28  * All rights reserved.
  29  */
  30
  31 /*LINTLIBRARY*/
  32
  33 #include <sys/types.h>
  34 #include <stdio.h>
  35 #include <string.h>
  36 #include <ctype.h>
  37 #include <pwd.h>
  38 #include <stdlib.h>
  39 #include <limits.h>
  40 #include "libadm.h"
  41
  42 #define PROMPT  "Enter the login name of an existing user"
  43 #define MESG    "Please enter the login name of an existing user."
  44 #define ALTMESG "Please enter one of the following login names:\\n\\t"
  45 #define MALSIZ  64
  46
  47 #define DELIM1 '/'
  48 #define BLANK ' '
  49
  50 static char *
  51 setmsg(int disp)
  52 {
  53         struct passwd
  54                 *pwdptr;
  55         int     count;
  56         size_t  n, m;
  57         char    *msg;
  58
  59         if (disp == 0)
  60                 return (MESG);
  61
  62         m = MALSIZ;
  63         n = sizeof (ALTMESG);
  64         msg = (char *) calloc(m, sizeof (char));
  65         (void) strcpy(msg, ALTMESG);
  66
  67         setpwent();
  68         count = 0;
  69         while (pwdptr = getpwent()) {
  70                 n += strlen(pwdptr->pw_name) + 2;
  71                 while (n >= m) {
  72                         m += MALSIZ;
  73                         msg = reallocarray(msg, m, sizeof (char));
  74                 }
  75                 if (count++)
  76                         (void) strcat(msg, ", ");
  77                 (void) strcat(msg, pwdptr->pw_name);
  78         }
  79         endpwent();
  80         return (msg);
  81 }
  82
  83 int
  84 ckuid_dsp(void)
  85 {
  86         struct passwd *pwdptr;
  87
  88         /* if display flag is set, then list out passwd file */
  89         if (ckpwdfile() == 1)
  90                 return (1);
  91         setpwent();
  92         while (pwdptr = getpwent())
  93                 (void) printf("%s\n", pwdptr->pw_name);
  94         endpwent();
  95         return (0);
  96 }
  97
  98 int
  99 ckuid_val(char *usrnm)
 100 {
 101         int     valid;
 102
 103         setpwent();
 104         valid = (getpwnam(usrnm) ? 0 : 1);
 105         endpwent();
 106         return (valid);
 107 }
 108
 109 int
 110 ckpwdfile(void) /* check to see if passwd file there */
 111 {
 112         struct passwd *pwdptr;
 113
 114         setpwent();
 115         pwdptr = getpwent();
 116         if (!pwdptr) {
 117                 endpwent();
 118                 return (1);
 119         }
 120         endpwent();
 121         return (0);
 122 }
 123
 124 void
 125 ckuid_err(short disp, char *error)
 126 {
 127         char    *msg;
 128
 129         msg = setmsg(disp);
 130         puterror(stdout, msg, error);
 131         if (disp)
 132                 free(msg);
 133 }
 134
 135 void
 136 ckuid_hlp(int disp, char *help)
 137 {
 138         char    *msg;
 139
 140         msg = setmsg(disp);
 141         puthelp(stdout, msg, help);
 142         if (disp)
 143                 free(msg);
 144 }
 145
 146 int
 147 ckuid(char *uid, short disp, char *defstr, char *error, char *help,
 148         char *prompt)
 149 {
 150         char    *defmesg,
 151                 input[MAX_INPUT];
 152
 153         defmesg = NULL;
 154         if (!prompt)
 155                 prompt = PROMPT;
 156
 157 start:
 158         putprmpt(stderr, prompt, NULL, defstr);
 159         if (getinput(input)) {
 160                 if (disp)
 161                         free(defmesg);
 162                 return (1);
 163         }
 164
 165         if (!strlen(input)) {
 166                 if (defstr) {
 167                         if (disp)
 168                                 free(defmesg);
 169                         (void) strcpy(uid, defstr);
 170                         return (0);
 171                 }
 172                 if (!defmesg)
 173                         defmesg = setmsg(disp);
 174                 puterror(stderr, defmesg, error);
 175                 goto start;
 176         } else if (strcmp(input, "?") == 0) {
 177                 if (!defmesg)
 178                         defmesg = setmsg(disp);
 179                 puthelp(stderr, defmesg, help);
 180                 goto start;
 181         } else if (ckquit && (strcmp(input, "q") == 0)) {
 182                 if (disp)
 183                         free(defmesg);
 184                 return (3);
 185         } else if (ckuid_val(input)) {
 186                 if (!defmesg)
 187                         defmesg = setmsg(disp);
 188                 puterror(stderr, defmesg, error);
 189                 goto start;
 190         }
 191         (void) strcpy(uid, input);
 192         if (disp)
 193                 free(defmesg);
 194         return (0);
 195 }