mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-23 03:10:05 +00:00
136 lines
3.1 KiB
C
136 lines
3.1 KiB
C
/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#include <ansidecl.h>
|
|
#include <errno.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <grp.h>
|
|
|
|
/* This is the function that all the others are based on.
|
|
The format of the group file is known only here. */
|
|
|
|
/* Structure containing info kept by each __grpread caller. */
|
|
typedef struct
|
|
{
|
|
char *buf;
|
|
size_t buflen;
|
|
size_t max_members;
|
|
char **members;
|
|
struct group g;
|
|
} grpread_info;
|
|
|
|
|
|
/* Return a chunk of memory containing a pre-initialized `grpread_info'. */
|
|
PTR
|
|
DEFUN_VOID(__grpalloc)
|
|
{
|
|
grpread_info *info = (PTR) malloc (sizeof(grpread_info));
|
|
if (info == NULL)
|
|
return NULL;
|
|
|
|
info->buf = NULL;
|
|
info->buflen = 0;
|
|
|
|
info->max_members = 5;
|
|
info->members = (char **) malloc (5 * sizeof(char *));
|
|
if (info->members == NULL)
|
|
{
|
|
free ((PTR) info);
|
|
return NULL;
|
|
}
|
|
|
|
return info;
|
|
}
|
|
|
|
/* Read a group entry from STREAM, filling in G. */
|
|
struct group *
|
|
DEFUN(__grpread, (stream, g), FILE *stream AND PTR CONST g)
|
|
{
|
|
register grpread_info *CONST info = (grpread_info *) g;
|
|
char *start, *end;
|
|
register size_t i;
|
|
|
|
/* Idiocy checks. */
|
|
if (stream == NULL)
|
|
{
|
|
errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
do
|
|
if (__getline (&info->buf, &info->buflen, stream) == -1)
|
|
return NULL;
|
|
while (info->buf[0] == '#');
|
|
|
|
start = info->buf;
|
|
end = strchr (start, ':');
|
|
if (end == NULL)
|
|
return NULL;
|
|
*end = '\0';
|
|
info->g.gr_name = start;
|
|
|
|
start = end + 1;
|
|
end = strchr (start, ':');
|
|
if (end == NULL)
|
|
return NULL;
|
|
*end = '\0';
|
|
info->g.gr_passwd = start;
|
|
|
|
info->g.gr_gid = (gid_t) strtol (end + 1, &end, 10);
|
|
if (*end != ':')
|
|
return NULL;
|
|
|
|
i = 0;
|
|
do
|
|
{
|
|
start = end + 1;
|
|
end = strchr (start, ',');
|
|
if (end == NULL)
|
|
{
|
|
end = strchr (start, '\n');
|
|
if (end == start)
|
|
break;
|
|
if (end == NULL)
|
|
return NULL;
|
|
*end = '\0';
|
|
end = NULL;
|
|
}
|
|
else
|
|
*end = '\0';
|
|
|
|
if (i == info->max_members - 2)
|
|
{
|
|
info->max_members += 5;
|
|
info->members = (char **)
|
|
realloc ((PTR) info->members, info->max_members * sizeof (char *));
|
|
if (info->members == NULL)
|
|
return NULL;
|
|
}
|
|
|
|
info->members[i++] = start;
|
|
} while (end != NULL);
|
|
info->members[i] = NULL;
|
|
info->g.gr_mem = info->members;
|
|
|
|
return &info->g;
|
|
}
|