FreeBSD-5.3/usr.sbin/pw/pw_vpw.c
/*-
* Copyright (C) 1996
* David L. Nugent. 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.
*
* THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT 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 DAVID L. NUGENT 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.
*
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD: src/usr.sbin/pw/pw_vpw.c,v 1.4 2004/06/17 14:07:16 robert Exp $";
#endif /* not lint */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/param.h>
#include "pwupd.h"
static FILE * pwd_fp = NULL;
void
vendpwent(void)
{
if (pwd_fp != NULL) {
fclose(pwd_fp);
pwd_fp = NULL;
}
}
void
vsetpwent(void)
{
vendpwent();
}
static struct passwd *
vnextpwent(char const * nam, uid_t uid, int doclose)
{
struct passwd * pw = NULL;
static char pwtmp[1024];
strlcpy(pwtmp, getpwpath(_MASTERPASSWD), sizeof(pwtmp));
if (pwd_fp != NULL || (pwd_fp = fopen(pwtmp, "r")) != NULL) {
int done = 0;
static struct passwd pwd;
while (!done && fgets(pwtmp, sizeof pwtmp, pwd_fp) != NULL)
{
int i, quickout = 0;
char * q;
char * p = strchr(pwtmp, '\n');
if (p == NULL) {
while (fgets(pwtmp, sizeof pwtmp, pwd_fp) != NULL && strchr(pwtmp, '\n')==NULL)
; /* Skip long lines */
continue;
}
/* skip comments & empty lines */
if (*pwtmp =='\n' || *pwtmp == '#')
continue;
i = 0;
q = p = pwtmp;
bzero(&pwd, sizeof pwd);
while (!quickout && (p = strsep(&q, ":\n")) != NULL) {
switch (i++)
{
case 0: /* username */
pwd.pw_name = p;
if (nam) {
if (strcmp(nam, p) == 0)
done = 1;
else
quickout = 1;
}
break;
case 1: /* password */
pwd.pw_passwd = p;
break;
case 2: /* uid */
pwd.pw_uid = atoi(p);
if (uid != (uid_t)-1) {
if (uid == pwd.pw_uid)
done = 1;
else
quickout = 1;
}
break;
case 3: /* gid */
pwd.pw_gid = atoi(p);
break;
case 4: /* class */
if (nam == NULL && uid == (uid_t)-1)
done = 1;
pwd.pw_class = p;
break;
case 5: /* change */
pwd.pw_change = (time_t)atol(p);
break;
case 6: /* expire */
pwd.pw_expire = (time_t)atol(p);
break;
case 7: /* gecos */
pwd.pw_gecos = p;
break;
case 8: /* directory */
pwd.pw_dir = p;
break;
case 9: /* shell */
pwd.pw_shell = p;
break;
}
}
}
if (doclose)
vendpwent();
if (done && pwd.pw_name) {
pw = &pwd;
#define CKNULL(s) s = s ? s : ""
CKNULL(pwd.pw_passwd);
CKNULL(pwd.pw_class);
CKNULL(pwd.pw_gecos);
CKNULL(pwd.pw_dir);
CKNULL(pwd.pw_shell);
}
}
return pw;
}
struct passwd *
vgetpwent(void)
{
return vnextpwent(NULL, -1, 0);
}
struct passwd *
vgetpwuid(uid_t uid)
{
return vnextpwent(NULL, uid, 1);
}
struct passwd *
vgetpwnam(const char * nam)
{
return vnextpwent(nam, -1, 1);
}
int vpwdb(char *arg, ...)
{
arg=arg;
return 0;
}
static FILE * grp_fp = NULL;
void
vendgrent(void)
{
if (grp_fp != NULL) {
fclose(grp_fp);
grp_fp = NULL;
}
}
RET_SETGRENT
vsetgrent(void)
{
vendgrent();
#if defined(__FreeBSD__)
return 0;
#endif
}
static struct group *
vnextgrent(char const * nam, gid_t gid, int doclose)
{
struct group * gr = NULL;
static char * grtmp = NULL;
static int grlen = 0;
static char ** mems = NULL;
static int memlen = 0;
extendline(&grtmp, &grlen, MAXPATHLEN);
strlcpy(grtmp, getgrpath(_GROUP), MAXPATHLEN);
if (grp_fp != NULL || (grp_fp = fopen(grtmp, "r")) != NULL) {
int done = 0;
static struct group grp;
while (!done && fgets(grtmp, grlen, grp_fp) != NULL)
{
int i, quickout = 0;
int mno = 0;
char * q, * p;
char * sep = ":\n";
if ((p = strchr(grtmp, '\n')) == NULL) {
int l;
extendline(&grtmp, &grlen, grlen + PWBUFSZ);
l = strlen(grtmp);
if (fgets(grtmp + l, grlen - l, grp_fp) == NULL)
break; /* No newline terminator on last line */
}
/* Skip comments and empty lines */
if (*grtmp == '\n' || *grtmp == '#')
continue;
i = 0;
q = p = grtmp;
bzero(&grp, sizeof grp);
extendarray(&mems, &memlen, 200);
while (!quickout && (p = strsep(&q, sep)) != NULL) {
switch (i++)
{
case 0: /* groupname */
grp.gr_name = p;
if (nam) {
if (strcmp(nam, p) == 0)
done = 1;
else
quickout = 1;
}
break;
case 1: /* password */
grp.gr_passwd = p;
break;
case 2: /* gid */
grp.gr_gid = atoi(p);
if (gid != (gid_t)-1) {
if (gid == (gid_t)grp.gr_gid)
done = 1;
else
quickout = 1;
} else if (nam == NULL)
done = 1;
break;
case 3:
q = p;
sep = ",\n";
break;
default:
if (*p) {
extendarray(&mems, &memlen, mno + 2);
mems[mno++] = p;
}
break;
}
}
grp.gr_mem = mems;
mems[mno] = NULL;
}
if (doclose)
vendgrent();
if (done && grp.gr_name) {
gr = &grp;
CKNULL(grp.gr_passwd);
}
}
return gr;
}
struct group *
vgetgrent(void)
{
return vnextgrent(NULL, -1, 0);
}
struct group *
vgetgrgid(gid_t gid)
{
return vnextgrent(NULL, gid, 1);
}
struct group *
vgetgrnam(const char * nam)
{
return vnextgrent(nam, -1, 1);
}
int
vgrdb(char *arg, ...)
{
arg=arg;
return 0;
}