7752137a6a
* sysdeps/mach/hurd/mmap.c: Fix inverted test of MAP_FIXED. * stdio/vfscanf.c (number): Allow field width to inhibit first digit after base detection. * stdio/vfprintf.c (vfprintf: %s): Never search past the limit specified by the precision. * grp/grpread.c (__grpscan): New function. * grp/grp.h (__grpscan): Declare it. * grp/getgrgid.c: Use __grpscan. * grp/getgrnam.c: Likewise. * pwd/pwdread.c (__pwdscan): New function. * pwd/pwd.h (__pwdscan): Declare it. * pwd/getpwnam.c: Use __pwdscan. * pwd/getpwuid.c: Likewise. Thu Aug 24 16:29:40 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> * sysdeps/mach/hurd/mmap.c: Treat (FLAGS & MAP_TYPE) == 0 like MAP_FILE. * hurd/thread-cancel.c: Return EINTR when called on self. * sysdeps/i386/elf/start.S (data_start): Define as weak alias for __data_start.
148 lines
3.2 KiB
C
148 lines
3.2 KiB
C
/* Copyright (C) 1991, 1992, 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <errno.h>
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#include <limits.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <pwd.h>
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#include <sys/types.h>
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/* This is the function that all the others are based on.
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The format of the password file is known only here. */
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/* Structure containing info kept by each __pwdread caller. */
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typedef struct
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{
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char *buf;
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size_t buflen;
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struct passwd p;
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} pwdread_info;
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/* Return a chunk of memory containing a pre-initialized `pwdread_info'. */
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PTR
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DEFUN_VOID(__pwdalloc)
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{
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pwdread_info *info = (PTR) malloc (sizeof(pwdread_info));
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if (info == NULL)
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return NULL;
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info->buf = NULL;
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info->buflen = 0;
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return info;
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}
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/* Read a password entry from STREAM, filling in P. */
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struct passwd *
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DEFUN(__pwdread, (stream, p), FILE *stream AND PTR CONST p)
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{
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register pwdread_info *CONST info = (pwdread_info *) p;
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char *start, *end;
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/* Idiocy checks. */
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if (stream == NULL)
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{
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errno = EINVAL;
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return NULL;
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}
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do
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if (__getline (&info->buf, &info->buflen, stream) == -1)
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return NULL;
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while (info->buf[0] == '#');
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start = info->buf;
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end = strchr (start, ':');
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if (end == NULL)
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return NULL;
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*end = '\0';
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info->p.pw_name = start;
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start = end + 1;
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end = strchr (start, ':');
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if (end == NULL)
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return NULL;
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*end = '\0';
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info->p.pw_passwd = start;
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info->p.pw_uid = (uid_t) strtol (end + 1, &end, 10);
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if (*end != ':')
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return NULL;
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info->p.pw_gid = (gid_t) strtol (end + 1, &end, 10);
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if (*end != ':')
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return NULL;
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start = end + 1;
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end = strchr (start, ':');
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if (end == NULL)
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return NULL;
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*end = '\0';
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info->p.pw_gecos = start;
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start = end + 1;
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end = strchr (start, ':');
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if (end == NULL)
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return NULL;
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*end = '\0';
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info->p.pw_dir = start;
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start = end + 1;
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end = strchr (start, '\n');
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if (end == NULL)
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return NULL;
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*end = '\0';
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info->p.pw_shell = start;
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return &info->p;
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}
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struct passwd *
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__pwdscan (void **info, int (*selector) (struct passwd *))
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{
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FILE *stream;
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struct passwd *p;
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if (*info == NULL)
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{
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*info = __pwdalloc ();
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if (info == NULL)
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return NULL;
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}
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stream = __pwdopen ();
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if (stream == NULL)
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return NULL;
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p = NULL;
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while (! feof (stream))
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{
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p = __pwdread (stream, *info);
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if (p && (*selector) (p))
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break;
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p = NULL;
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}
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(void) fclose (stream);
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return p;
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}
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