mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
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303 lines
7.0 KiB
C
303 lines
7.0 KiB
C
/*-
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* Copyright (C) 1996
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* David L. Nugent. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/param.h>
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#include "pwupd.h"
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static FILE * pwd_fp = NULL;
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void
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vendpwent(void)
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{
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if (pwd_fp != NULL) {
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fclose(pwd_fp);
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pwd_fp = NULL;
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}
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}
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void
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vsetpwent(void)
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{
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vendpwent();
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}
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static struct passwd *
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vnextpwent(char const * nam, uid_t uid, int doclose)
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{
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struct passwd * pw = NULL;
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static char pwtmp[1024];
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strlcpy(pwtmp, getpwpath(_MASTERPASSWD), sizeof(pwtmp));
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if (pwd_fp != NULL || (pwd_fp = fopen(pwtmp, "r")) != NULL) {
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int done = 0;
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static struct passwd pwd;
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while (!done && fgets(pwtmp, sizeof pwtmp, pwd_fp) != NULL)
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{
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int i, quickout = 0;
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char * q;
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char * p = strchr(pwtmp, '\n');
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if (p == NULL) {
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while (fgets(pwtmp, sizeof pwtmp, pwd_fp) != NULL && strchr(pwtmp, '\n')==NULL)
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; /* Skip long lines */
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continue;
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}
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/* skip comments & empty lines */
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if (*pwtmp =='\n' || *pwtmp == '#')
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continue;
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i = 0;
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q = p = pwtmp;
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bzero(&pwd, sizeof pwd);
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while (!quickout && (p = strsep(&q, ":\n")) != NULL) {
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switch (i++)
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{
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case 0: /* username */
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pwd.pw_name = p;
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if (nam) {
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if (strcmp(nam, p) == 0)
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done = 1;
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else
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quickout = 1;
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}
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break;
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case 1: /* password */
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pwd.pw_passwd = p;
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break;
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case 2: /* uid */
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pwd.pw_uid = atoi(p);
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if (uid != (uid_t)-1) {
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if (uid == pwd.pw_uid)
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done = 1;
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else
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quickout = 1;
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}
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break;
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case 3: /* gid */
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pwd.pw_gid = atoi(p);
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break;
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case 4: /* class */
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if (nam == NULL && uid == (uid_t)-1)
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done = 1;
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pwd.pw_class = p;
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break;
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case 5: /* change */
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pwd.pw_change = (time_t)atol(p);
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break;
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case 6: /* expire */
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pwd.pw_expire = (time_t)atol(p);
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break;
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case 7: /* gecos */
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pwd.pw_gecos = p;
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break;
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case 8: /* directory */
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pwd.pw_dir = p;
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break;
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case 9: /* shell */
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pwd.pw_shell = p;
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break;
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}
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}
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}
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if (doclose)
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vendpwent();
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if (done && pwd.pw_name) {
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pw = &pwd;
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#define CKNULL(s) s = s ? s : ""
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CKNULL(pwd.pw_passwd);
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CKNULL(pwd.pw_class);
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CKNULL(pwd.pw_gecos);
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CKNULL(pwd.pw_dir);
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CKNULL(pwd.pw_shell);
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}
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}
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return pw;
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}
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struct passwd *
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vgetpwent(void)
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{
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return vnextpwent(NULL, -1, 0);
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}
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struct passwd *
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vgetpwuid(uid_t uid)
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{
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return vnextpwent(NULL, uid, 1);
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}
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struct passwd *
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vgetpwnam(const char * nam)
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{
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return vnextpwent(nam, -1, 1);
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}
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static FILE * grp_fp = NULL;
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void
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vendgrent(void)
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{
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if (grp_fp != NULL) {
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fclose(grp_fp);
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grp_fp = NULL;
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}
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}
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RET_SETGRENT
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vsetgrent(void)
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{
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vendgrent();
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#if defined(__FreeBSD__)
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return 0;
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#endif
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}
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static struct group *
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vnextgrent(char const * nam, gid_t gid, int doclose)
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{
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struct group * gr = NULL;
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static char * grtmp = NULL;
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static int grlen = 0;
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static char ** mems = NULL;
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static int memlen = 0;
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extendline(&grtmp, &grlen, MAXPATHLEN);
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strlcpy(grtmp, getgrpath(_GROUP), MAXPATHLEN);
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if (grp_fp != NULL || (grp_fp = fopen(grtmp, "r")) != NULL) {
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int done = 0;
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static struct group grp;
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while (!done && fgets(grtmp, grlen, grp_fp) != NULL)
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{
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int i, quickout = 0;
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int mno = 0;
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char * q, * p;
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const char * sep = ":\n";
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if ((p = strchr(grtmp, '\n')) == NULL) {
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int l;
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extendline(&grtmp, &grlen, grlen + PWBUFSZ);
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l = strlen(grtmp);
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if (fgets(grtmp + l, grlen - l, grp_fp) == NULL)
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break; /* No newline terminator on last line */
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}
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/* Skip comments and empty lines */
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if (*grtmp == '\n' || *grtmp == '#')
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continue;
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i = 0;
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q = p = grtmp;
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bzero(&grp, sizeof grp);
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extendarray(&mems, &memlen, 200);
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while (!quickout && (p = strsep(&q, sep)) != NULL) {
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switch (i++)
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{
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case 0: /* groupname */
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grp.gr_name = p;
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if (nam) {
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if (strcmp(nam, p) == 0)
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done = 1;
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else
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quickout = 1;
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}
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break;
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case 1: /* password */
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grp.gr_passwd = p;
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break;
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case 2: /* gid */
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grp.gr_gid = atoi(p);
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if (gid != (gid_t)-1) {
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if (gid == (gid_t)grp.gr_gid)
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done = 1;
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else
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quickout = 1;
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} else if (nam == NULL)
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done = 1;
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break;
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case 3:
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q = p;
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sep = ",\n";
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break;
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default:
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if (*p) {
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extendarray(&mems, &memlen, mno + 2);
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mems[mno++] = p;
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}
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break;
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}
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}
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grp.gr_mem = mems;
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mems[mno] = NULL;
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}
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if (doclose)
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vendgrent();
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if (done && grp.gr_name) {
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gr = &grp;
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CKNULL(grp.gr_passwd);
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}
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}
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return gr;
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}
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struct group *
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vgetgrent(void)
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{
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return vnextgrent(NULL, -1, 0);
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}
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struct group *
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vgetgrgid(gid_t gid)
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{
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return vnextgrent(NULL, gid, 1);
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}
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struct group *
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vgetgrnam(const char * nam)
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{
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return vnextgrent(nam, -1, 1);
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}
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