mirror of
https://github.com/systemd/systemd.git
synced 2024-11-06 08:26:52 +03:00
e5a2989efb
here is a patch on top of your nice improvements. I fixed the whitespace and it hopefully fixes the stupid timestamp bug in udevd. Some stupid OS sets the hwclock to localtime and linux changes it to UTC while starting. If any events are pending they may be delayed by the users time distance from UTC :) So we use the uptime seconds now.
164 lines
3.2 KiB
C
164 lines
3.2 KiB
C
/*
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* klibc_fixups.c - very simple implementation of stuff missing in klibc
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*
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* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
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* Copyright (C) 2004 Kay Sievers <kay@vrfy.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifdef __KLIBC__
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include "udev.h"
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#include "klibc_fixups.h"
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#include "udev_lib.h"
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#include "logging.h"
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#define PW_FILE "/etc/passwd"
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#define GR_FILE "/etc/group"
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#define UTMP_FILE "/var/run/utmp"
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_syscall1(int, sysinfo, struct sysinfo *, info);
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/* return the id of a passwd style line, selected by the users name */
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static unsigned long get_id_by_name(const char *uname, const char *dbfile)
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{
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unsigned long id = -1;
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char line[255];
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char *buf;
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size_t bufsize;
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size_t cur;
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size_t count;
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char *pos;
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char *name;
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char *idstr;
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char *tail;
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if (file_map(dbfile, &buf, &bufsize) == 0) {
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dbg("reading '%s' as db file", dbfile);
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} else {
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dbg("can't open '%s' as db file", dbfile);
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return -1;
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}
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/* loop through the whole file */
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cur = 0;
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while (1) {
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count = buf_get_line(buf, bufsize, cur);
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strncpy(line, buf + cur, count);
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line[count] = '\0';
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pos = line;
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cur += count+1;
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if (cur > bufsize)
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break;
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/* get name */
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name = strsep(&pos, ":");
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if (name == NULL)
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continue;
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/* skip pass */
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if (strsep(&pos, ":") == NULL)
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continue;
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/* get id */
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idstr = strsep(&pos, ":");
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if (idstr == NULL)
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continue;
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if (strcmp(uname, name) == 0) {
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id = strtoul(idstr, &tail, 10);
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if (tail[0] != '\0')
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id = -1;
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else
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dbg("id for '%s' is '%li'", name, id);
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break;
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}
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}
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file_unmap(buf, bufsize);
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return id;
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}
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struct passwd *getpwnam(const char *name)
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{
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static struct passwd pw;
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memset(&pw, 0x00, sizeof(struct passwd));
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pw.pw_uid = (uid_t) get_id_by_name(name, PW_FILE);
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if (pw.pw_uid < 0)
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return NULL;
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else
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return &pw;
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}
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struct group *getgrnam(const char *name)
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{
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static struct group gr;
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memset(&gr, 0x00, sizeof(struct group));
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gr.gr_gid = (gid_t) get_id_by_name(name, GR_FILE);
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if (gr.gr_gid < 0)
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return NULL;
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else
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return &gr;
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}
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int ufd = -1;
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void setutent()
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{
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if (ufd < 0)
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ufd = open(UTMP_FILE, O_RDONLY);
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fcntl(ufd, F_SETFD, FD_CLOEXEC);
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lseek(ufd, 0, SEEK_SET);
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}
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void endutent() {
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if (ufd < 0)
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return;
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close(ufd);
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ufd = -1;
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}
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struct utmp *getutent(void)
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{
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static struct utmp utmp;
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int retval;
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if (ufd < 0) {
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setutent();
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if (ufd < 0)
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return NULL;
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}
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retval = read(ufd, &utmp, sizeof(struct utmp));
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if (retval < 1)
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return NULL;
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return &utmp;
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}
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#endif
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