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/* $OpenBSD: getpwent.c,v 1.2 2000/03/01 22:10:12 todd Exp $ */
/* $NetBSD: getpwent.c,v 1.2 1995/10/13 18:10:27 gwr Exp $ */
/*
* Copyright (c) 1995 Gordon W. Ross
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
* 4. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Gordon W. Ross
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* Smaller replacement for: libc/gen/getpwent.c
* Needed by programs like: rsh, rlogin
*/
#include <stdio.h>
#include <string.h>
#include <pwd.h>
#define PWNULL (struct passwd *)0
#define MAXFIELD 8
static char *pw_file = "/etc/passwd";
static FILE *pw_fp;
static char pw_line[128];
static struct passwd pw_ent;
/*
* Open passwd file if necessary, and
* get the next entry.
*/
struct passwd *
getpwent()
{
char *fv[MAXFIELD];
char *p;
int fc;
/* Open passwd file if not already. */
if (pw_fp == NULL)
pw_fp = fopen(pw_file, "r");
/* Still NULL. No passwd file? */
if (pw_fp == NULL)
return PWNULL;
readnext:
/* Read the next line... */
if (fgets(pw_line, sizeof(pw_line), pw_fp) == NULL)
return PWNULL;
/* ...and parse it. */
p = pw_line;
fc = 0;
while (fc < MAXFIELD) {
fv[fc] = strsep(&p, ":\n");
if (fv[fc] == NULL)
break;
fc++;
}
/* Need at least 0..5 */
if (fc < 6)
goto readnext;
while (fc < MAXFIELD)
fv[fc++] = "";
/* Build the pw entry... */
pw_ent.pw_name = fv[0];
pw_ent.pw_passwd = fv[1];
pw_ent.pw_uid = atoi(fv[2]);
pw_ent.pw_gid = atoi(fv[3]);
pw_ent.pw_gecos = fv[4];
pw_ent.pw_dir = fv[5];
pw_ent.pw_shell = fv[6];
return (&pw_ent);
}
/* internal for setpwent() */
int
setpassent(stayopen)
int stayopen;
{
if (pw_fp)
rewind(pw_fp);
}
/* rewind to the beginning. */
void
setpwent()
{
(void) setpassent(0);
}
/* done with the passwd file */
void
endpwent()
{
if (pw_fp) {
fclose(pw_fp);
pw_fp = NULL;
}
}
struct passwd *
getpwnam(name)
const char *name;
{
struct passwd *pw;
setpwent();
while ((pw = getpwent()) != PWNULL)
if (!strcmp(pw->pw_name, name))
break;
endpwent();
return(pw);
}
struct passwd *
getpwuid(uid)
uid_t uid;
{
struct passwd *pw;
setpwent();
while ((pw = getpwent()) != PWNULL)
if (pw->pw_uid == uid)
break;
endpwent();
return(pw);
}
#ifdef TEST_MAIN
main() {
struct passwd *pw;
printf("#name, password, uid, gid, comment, dir, shell\n");
while ((pw = getpwent()) != NULL) {
printf("%s:%s:", pw->pw_name, pw->pw_passwd);
printf("%d:%d:", pw->pw_uid, pw->pw_gid);
printf("%s:", pw->pw_gecos);
printf("%s:", pw->pw_dir);
printf("%s\n", pw->pw_shell);
}
}
#endif
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