usr/src/cmd/getent/dogetgr.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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #include <stdio.h>
  28 #include <grp.h>
  29 #include <stdlib.h>
  30 #include <errno.h>
  31 #include "getent.h"
  32
  33
  34 static int
  35 putgrent(const struct group *grp, FILE *fp)
  36 {
  37         char **mem;
  38         int rc = 0;
  39
  40         if (grp == NULL) {
  41                 return (1);
  42         }
  43
  44         if (fprintf(fp, "%s:%s:%u:",
  45             grp->gr_name != NULL ? grp->gr_name : "",
  46             grp->gr_passwd != NULL ? grp->gr_passwd : "",
  47             grp->gr_gid) == EOF)
  48                 rc = 1;
  49
  50         mem = grp ->gr_mem;
  51
  52         if (mem != NULL) {
  53                 if (*mem != NULL)
  54                         if (fputs(*mem++, fp) == EOF)
  55                                 rc = 1;
  56
  57                 while (*mem != NULL)
  58                         if (fprintf(fp, ",%s", *mem++) == EOF)
  59                                 rc = 1;
  60         }
  61         if (putc('\n', fp) == EOF)
  62                 rc = 1;
  63         return (rc);
  64 }
  65
  66 int
  67 dogetgr(const char **list)
  68 {
  69         struct group *grp;
  70         int rc = EXC_SUCCESS;
  71         char *ptr;
  72         gid_t gid;
  73
  74         if (list == NULL || *list == NULL) {
  75                 while ((grp = getgrent()) != NULL)
  76                         (void) putgrent(grp, stdout);
  77         } else {
  78                 for (; *list != NULL; list++) {
  79                         errno = 0;
  80
  81                         /*
  82                          * Here we assume that the argument passed is
  83                          * a gid, if it can be completely transformed
  84                          * to a long integer. So we check for gid in
  85                          * the database and if we fail then we check
  86                          * for the group name.
  87                          * If the argument passed is not numeric, then
  88                          * we take it as the group name and proceed.
  89                          */
  90                         gid = strtoul(*list, &ptr, 10);
  91                         if (!(*ptr == '\0' && errno == 0) ||
  92                             ((grp = getgrgid(gid)) == NULL)) {
  93                                 grp = getgrnam(*list);
  94                         }
  95                         if (grp == NULL)
  96                                 rc = EXC_NAME_NOT_FOUND;
  97                         else
  98                                 (void) putgrent(grp, stdout);
  99                 }
 100         }
 101
 102         return (rc);
 103 }