]>
git.ipfire.org Git - thirdparty/systemd.git/blob - klibc_fixups.c
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
));