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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"
35 #define PW_FILE "/etc/passwd"
36 #define GR_FILE "/etc/group"
37 #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;
54 if (file_map(dbfile
, &buf
, &bufsize
) == 0) {
55 dbg("reading '%s' as db file", dbfile
);
57 dbg("can't open '%s' as db file", dbfile
);
61 /* loop through the whole file */
65 count
= buf_get_line(buf
, bufsize
, cur
);
67 strncpy(line
, buf
+ cur
, count
);
76 name
= strsep(&pos
, ":");
81 if (strsep(&pos
, ":") == NULL
)
85 idstr
= strsep(&pos
, ":");
89 if (strcmp(uname
, name
) == 0) {
90 id
= strtoul(idstr
, &tail
, 10);
94 dbg("id for '%s' is '%li'", name
, id
);
99 file_unmap(buf
, bufsize
);
103 struct passwd
*getpwnam(const char *name
)
105 static struct passwd pw
;
107 memset(&pw
, 0x00, sizeof(struct passwd
));
108 pw
.pw_uid
= (uid_t
) get_id_by_name(name
, PW_FILE
);
115 struct group
*getgrnam(const char *name
)
117 static struct group gr
;
119 memset(&gr
, 0x00, sizeof(struct group
));
120 gr
.gr_gid
= (gid_t
) get_id_by_name(name
, GR_FILE
);
133 ufd
= open(UTMP_FILE
, O_RDONLY
);
134 fcntl(ufd
, F_SETFD
, FD_CLOEXEC
);
135 lseek(ufd
, 0, SEEK_SET
);
145 struct utmp
*getutent(void)
147 static struct utmp utmp
;
155 retval
= read(ufd
, &utmp
, sizeof(struct utmp
));