gno/lib/libc/gen/getpwent.c

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/*
* Copyright (c) 1988 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* This is an old implementation and needs to be replaced; just not quite
* yet -- gdr
*
* $Id: getpwent.c,v 1.2 1997/09/21 06:05:00 gdr Exp $
*
* This file is formatted with tab stops every 8 characters.
*/
#ifdef __ORCAC__
segment "libc_gen__";
#endif
#define _PATH_PASSWD "/etc/passwd"
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getpwent.c 5.21 (Berkeley) 3/14/91";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <pwd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <err.h>
#define LENGTH 128
#define _PATH_PASSWD "/etc/passwd"
static struct passwd _pw_passwd; /* password structure */
static char pwline[LENGTH]; /* line in /etc/passwd */
static FILE * f_passwd = NULL;
#if 0
static int _pw_stayopen = 0; /* keep fd's open */
#endif
static FILE *
_getpwfp (void) {
if (f_passwd == NULL) {
f_passwd = fopen(_PATH_PASSWD, "r");
if (f_passwd == NULL) {
/* this should really be going out via syslog */
errx(1, "couldn't open %s", _PATH_PASSWD);
}
}
return f_passwd;
}
static struct passwd *
_parsepw (struct passwd *_pw, char *line)
{
char *q, *r;
_pw->pw_fields = 0L; /* no fields filled in yet */
if ((q = strchr(line, '\n')) != NULL) {
*q = '\0';
}
/* user name */
_pw->pw_name = line;
if ((q = strchr(line,':')) == NULL) {
return NULL;
}
*q++ = '\0';
_pw->pw_fields |= _PWF_NAME;
/* password */
_pw->pw_passwd = q;
if ((q = strchr(q,':')) == NULL) {
return NULL;
}
*q++ = '\0';
_pw->pw_fields |= _PWF_PASSWD;
/* user id */
errno = 0;
_pw->pw_uid = (int) strtol(q, &r, 10);
if (errno == ERANGE || q == r) {
return NULL;
}
q = r;
*q++ = '\0';
_pw->pw_fields |= _PWF_UID;
/* group id */
errno = 0;
_pw->pw_gid = (int) strtol(q, &r, 10);
if (errno == ERANGE || q == r) {
return NULL;
}
q = r;
*q++ = '\0';
_pw->pw_fields |= _PWF_GID;
/* real name */
_pw->pw_gecos = q;
if ((q = strchr(q,':')) == NULL) {
return NULL;
}
*q++ = '\0';
_pw->pw_fields |= _PWF_GECOS;
/* home directory */
_pw->pw_dir = q;
if ((q = strchr(q,':')) == NULL) {
return NULL;
}
*q++ = '\0';
_pw->pw_fields |= _PWF_DIR;
/* shell -- last one, so handle it differently */
_pw->pw_shell = q;
if ((q = strchr(q,':')) != NULL) {
*q = '\0';
}
_pw->pw_fields |= _PWF_SHELL;
/* "not filled in":
* password change time
* user access class
* account expiry time
*/
_pw->pw_change = _pw->pw_expire = 0L;
_pw->pw_class = NULL;
return _pw;
}
struct passwd *
getpwent(void)
{
FILE *fp;
fp = _getpwfp();
if (fgets(pwline, LENGTH, fp) == NULL) {
return NULL;
}
return _parsepw (&_pw_passwd, pwline);
}
struct passwd *
getpwnam(char *name) {
FILE *fp;
struct passwd *result;
fp = _getpwfp();
rewind(fp);
while (fgets(pwline, LENGTH, fp) != NULL) {
result = _parsepw (&_pw_passwd, pwline);
if (result == NULL || !strcmp(name, result->pw_name)) {
return result;
}
}
return NULL;
}
struct passwd *
getpwuid(uid_t uid)
{
FILE *fp;
struct passwd *result;
fp = _getpwfp();
rewind(fp);
while (fgets(pwline, LENGTH, fp) != NULL) {
result = _parsepw (&_pw_passwd, pwline);
if (result == NULL || uid == result->pw_uid) {
return result;
}
}
return NULL;
}
int
setpwent(void)
{
if (f_passwd != NULL) {
rewind(f_passwd);
}
return 1;
}
void
endpwent(void)
{
if (f_passwd != NULL) {
fclose(f_passwd);
f_passwd = NULL;
}
}
#ifdef NOTDEFINED
int
setpassent(stayopen)
int stayopen;
{
_pw_keynum = 0;
_pw_stayopen = stayopen;
return(1);
}
#endif