2 * klibc_fixups.c - very simple implementation of stuff missing in klibc
4 * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
5 * Copyright (C) 2004 Kay Sievers <kay@vrfy.org>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation version 2 of the License.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 675 Mass Ave, Cambridge, MA 02139, USA.
29 #include <sys/types.h>
32 #include "klibc_fixups.h"
36 #define PW_FILE "/etc/passwd"
37 #define GR_FILE "/etc/group"
38 #define UTMP_FILE "/var/run/utmp"
40 /* return the id of a passwd style line, selected by the users name */
41 static unsigned long get_id_by_name(const char *uname, const char *dbfile)
43 unsigned long id = -1;
55 if (file_map(dbfile, &buf, &bufsize) == 0) {
56 dbg("reading '%s' as db file", dbfile);
58 dbg("can't open '%s' as db file", dbfile);
62 /* loop through the whole file */
64 while (cur < bufsize) {
65 count = buf_get_line(buf, bufsize, cur);
69 if (count >= LINE_SIZE)
72 strncpy(line, bufline, count);
77 name = strsep(&pos, ":");
82 if (strsep(&pos, ":") == NULL)
86 idstr = strsep(&pos, ":");
90 if (strcmp(uname, name) == 0) {
91 id = strtoul(idstr, &tail, 10);
95 dbg("id for '%s' is '%li'", name, id);
100 file_unmap(buf, bufsize);
104 struct passwd *getpwnam(const char *name)
106 static struct passwd pw;
108 memset(&pw, 0x00, sizeof(struct passwd));
109 pw.pw_uid = (uid_t) get_id_by_name(name, PW_FILE);
116 struct group *getgrnam(const char *name)
118 static struct group gr;
120 memset(&gr, 0x00, sizeof(struct group));
121 gr.gr_gid = (gid_t) get_id_by_name(name, GR_FILE);
134 ufd = open(UTMP_FILE, O_RDONLY);
135 fcntl(ufd, F_SETFD, FD_CLOEXEC);
136 lseek(ufd, 0, SEEK_SET);
146 struct utmp *getutent(void)
148 static struct utmp utmp;
156 retval = read(ufd, &utmp, sizeof(struct utmp));