mirror of
https://github.com/AuxXxilium/eudev.git
synced 2024-12-16 03:27:49 +07:00
84df02dd63
Our own implementation of the sysinfo system call is no longer needed, cause it's merged it into klibc now.
162 lines
3.1 KiB
C
162 lines
3.1 KiB
C
/*
|
|
* klibc_fixups.c - very simple implementation of stuff missing in klibc
|
|
*
|
|
* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
|
|
* Copyright (C) 2004 Kay Sievers <kay@vrfy.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation version 2 of the License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
*/
|
|
|
|
#ifdef __KLIBC__
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include <fcntl.h>
|
|
#include <sys/types.h>
|
|
|
|
#include "udev.h"
|
|
#include "klibc_fixups.h"
|
|
#include "udev_lib.h"
|
|
#include "logging.h"
|
|
|
|
#define PW_FILE "/etc/passwd"
|
|
#define GR_FILE "/etc/group"
|
|
#define UTMP_FILE "/var/run/utmp"
|
|
|
|
/* return the id of a passwd style line, selected by the users name */
|
|
static unsigned long get_id_by_name(const char *uname, const char *dbfile)
|
|
{
|
|
unsigned long id = -1;
|
|
char line[255];
|
|
char *buf;
|
|
size_t bufsize;
|
|
size_t cur;
|
|
size_t count;
|
|
char *pos;
|
|
char *name;
|
|
char *idstr;
|
|
char *tail;
|
|
|
|
if (file_map(dbfile, &buf, &bufsize) == 0) {
|
|
dbg("reading '%s' as db file", dbfile);
|
|
} else {
|
|
dbg("can't open '%s' as db file", dbfile);
|
|
return -1;
|
|
}
|
|
|
|
/* loop through the whole file */
|
|
|
|
cur = 0;
|
|
while (1) {
|
|
count = buf_get_line(buf, bufsize, cur);
|
|
|
|
strncpy(line, buf + cur, count);
|
|
line[count] = '\0';
|
|
pos = line;
|
|
|
|
cur += count+1;
|
|
if (cur > bufsize)
|
|
break;
|
|
|
|
/* get name */
|
|
name = strsep(&pos, ":");
|
|
if (name == NULL)
|
|
continue;
|
|
|
|
/* skip pass */
|
|
if (strsep(&pos, ":") == NULL)
|
|
continue;
|
|
|
|
/* get id */
|
|
idstr = strsep(&pos, ":");
|
|
if (idstr == NULL)
|
|
continue;
|
|
|
|
if (strcmp(uname, name) == 0) {
|
|
id = strtoul(idstr, &tail, 10);
|
|
if (tail[0] != '\0')
|
|
id = -1;
|
|
else
|
|
dbg("id for '%s' is '%li'", name, id);
|
|
break;
|
|
}
|
|
}
|
|
|
|
file_unmap(buf, bufsize);
|
|
return id;
|
|
}
|
|
|
|
struct passwd *getpwnam(const char *name)
|
|
{
|
|
static struct passwd pw;
|
|
|
|
memset(&pw, 0x00, sizeof(struct passwd));
|
|
pw.pw_uid = (uid_t) get_id_by_name(name, PW_FILE);
|
|
if (pw.pw_uid < 0)
|
|
return NULL;
|
|
else
|
|
return &pw;
|
|
}
|
|
|
|
struct group *getgrnam(const char *name)
|
|
{
|
|
static struct group gr;
|
|
|
|
memset(&gr, 0x00, sizeof(struct group));
|
|
gr.gr_gid = (gid_t) get_id_by_name(name, GR_FILE);
|
|
if (gr.gr_gid < 0)
|
|
return NULL;
|
|
else
|
|
return &gr;
|
|
}
|
|
|
|
|
|
int ufd = -1;
|
|
|
|
void setutent()
|
|
{
|
|
if (ufd < 0)
|
|
ufd = open(UTMP_FILE, O_RDONLY);
|
|
fcntl(ufd, F_SETFD, FD_CLOEXEC);
|
|
lseek(ufd, 0, SEEK_SET);
|
|
}
|
|
|
|
void endutent() {
|
|
if (ufd < 0)
|
|
return;
|
|
close(ufd);
|
|
ufd = -1;
|
|
}
|
|
|
|
struct utmp *getutent(void)
|
|
{
|
|
static struct utmp utmp;
|
|
int retval;
|
|
|
|
if (ufd < 0) {
|
|
setutent();
|
|
if (ufd < 0)
|
|
return NULL;
|
|
}
|
|
retval = read(ufd, &utmp, sizeof(struct utmp));
|
|
if (retval < 1)
|
|
return NULL;
|
|
return &utmp;
|
|
}
|
|
|
|
#endif
|