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- /* 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 <limits.h>
- #include <stddef.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <pwd.h>
- #include <sys/types.h>
-
- #ifndef NO_SHADOW
- #include "shadow.h"
- #endif
-
- #ifdef YP
- extern struct passwd * __nis_parsepwddata(char *, void *);
- #endif
-
- /* This is the function that all the others are based on.
- The format of the password file is known only here. */
-
- /* Structure containing info kept by each __pwdread caller. */
- typedef struct
- {
- char *buf;
- size_t buflen;
- struct passwd p;
- } pwdread_info;
-
-
- /* Return a chunk of memory containing a pre-initialized `pwdread_info'. */
- PTR
- DEFUN_VOID(__pwdalloc)
- {
- pwdread_info *info = (PTR) malloc (sizeof(pwdread_info));
- if (info == NULL)
- return NULL;
- info->buf = NULL;
- info->buflen = 0;
- return info;
- }
-
- /* Read a password entry from STREAM, filling in P. */
- struct passwd *
- DEFUN(__pwdread, (stream, p), FILE *stream AND PTR CONST p)
- {
- register pwdread_info *CONST info = (pwdread_info *) p;
- char *start, *end;
- int is_nis_entry = 0;
-
- /* 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;
- #ifdef YP
- if ('+' == *start || '-' == *start)
- {
- is_nis_entry = 1;
- info->p.pw_gecos = info->p.pw_dir = info->p.pw_shell = NULL ;
- }
- #endif
- end = strchr (start, ':');
- info->p.pw_name = start;
- if (end == NULL)
- {
- if (!is_nis_entry)
- return NULL;
- end = strchr(info->p.pw_name, '\n');
- if (NULL != end)
- *end = '\0';
- return &info->p;
- }
- *end = '\0';
-
- start = end + 1;
- end = strchr (start, ':');
- if (end == NULL)
- return ( is_nis_entry ? &info->p : NULL );
- *end = '\0';
- info->p.pw_passwd = start;
-
- #ifndef NO_SHADOW
- {
- struct spwd *spw = getspnam (info->p.pw_name);
-
- if (spw)
- info->p.pw_passwd = spw->sp_pwdp;
- }
- #endif
-
- info->p.pw_uid = (uid_t) strtol (end + 1, &end, 10);
- if (*end != ':')
- return ( is_nis_entry ? &info->p : NULL );
- info->p.pw_gid = (gid_t) strtol (end + 1, &end, 10);
- if (*end != ':')
- return ( is_nis_entry ? &info->p : NULL );
-
- start = end + 1;
- info->p.pw_gecos = start;
- end = strchr (start, ':');
- if (end == NULL)
- {
- if (!is_nis_entry)
- return NULL;
- end = strchr(info->p.pw_gecos, '\n');
- if (NULL != end)
- *end = '\0';
- return &info->p;
- }
- *end = '\0';
-
- start = end + 1;
- info->p.pw_dir = start;
- end = strchr (start, ':');
- if (end == NULL)
- {
- if (!is_nis_entry)
- return NULL;
- end = strchr(info->p.pw_dir, '\n');
- if (NULL != end)
- *end = '\0';
- return &info->p;
- }
- *end = '\0';
-
- start = end + 1;
- info->p.pw_shell = start;
- end = strchr (start, '\n');
- if (end == NULL)
- return ( is_nis_entry ? &info->p : NULL );
- *end = '\0';
-
- return &info->p;
- }
-
- #ifdef YP
- struct passwd *
- __nis_parsepwddata (char *line, void *p)
- {
- register pwdread_info *const info = (pwdread_info *)p;
- struct passwd *pw = &info->p;
- char *start, *end;
- register int i;
-
- i = strlen(line) + 1;
- if (NULL == info->buf || info->buflen < i)
- {
- start = (NULL == info->buf) ? malloc(i) : realloc(info->buf, i);
- if (NULL == start)
- return NULL;
- info->buf = start;
- info->buflen = i;
- }
- strcpy(info->buf, line);
-
- start = info->buf ;
- end = strchr(start, ':') ;
- if (end == NULL)
- return NULL ;
- *end = '\0' ;
- pw->pw_name = start ;
- start = end + 1 ;
- end = strchr(start, ':') ;
- if (end == NULL)
- return NULL ;
- *end = '\0' ;
- pw->pw_passwd = start ;
- start = end + 1 ;
- end = strchr(start, ':') ;
- if (end == NULL)
- return NULL ;
- *end = '\0' ;
- pw->pw_uid = atoi(start);
- start = end + 1 ;
- end = strchr(start, ':') ;
- if (end == NULL)
- return NULL ;
- *end = '\0' ;
- pw->pw_gid = atoi(start);
- start = end + 1 ;
- end = strchr(start, ':') ;
- if (end == NULL)
- return NULL ;
- *end = '\0' ;
- pw->pw_gecos = start ;
- start = end + 1 ;
- end = strchr(start, ':') ;
- if (end == NULL)
- return NULL ;
- *end = '\0' ;
- pw->pw_dir = start ;
- start = end + 1 ;
- end = strchr(start, '\n') ;
- if (end != NULL)
- *end = '\0' ;
- pw->pw_shell = start ;
- return pw;
- }
- #endif
-