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https://github.com/systemd/systemd-stable.git
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1aa1e24848
We never used any of the libsysfs convenience features. Here we replace it completely with 300 lines of code, which are much simpler and a bit faster cause udev(d) does not open any syfs file for a simple event which does not need any parent device information. Signed-off-by: Kay Sievers <kay.sievers@suse.de>
96 lines
1.9 KiB
C
96 lines
1.9 KiB
C
/*
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* udev_run_devd.c - directory multiplexer
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*
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* Copyright (C) 2005 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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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stddef.h>
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#include <dirent.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <sys/stat.h>
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#include "../../udev.h"
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#include "run_directory.h"
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#ifdef USE_LOG
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void log_message (int priority, const char *format, ...)
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{
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va_list args;
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static int udev_log = -1;
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if (udev_log == -1) {
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const char *value;
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value = getenv("UDEV_LOG");
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if (value)
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udev_log = log_priority(value);
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else
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udev_log = LOG_ERR;
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}
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if (priority > udev_log)
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return;
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va_start(args, format);
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vsyslog(priority, format, args);
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va_end(args);
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}
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#endif
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int main(int argc, char *argv[], char *envp[])
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{
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char dirname[NAME_SIZE];
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const char *devname;
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const char *my_devname;
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const char *subsystem;
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int fd;
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devname = getenv("DEVNAME");
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if (devname == NULL)
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exit(0);
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/*
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* Hack, we are assuming that the device nodes are in /dev,
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* if not, this will not work, but you should be using the
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* RUN= rule anyway...
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*/
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my_devname = strstr(devname, "/dev/");
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if (my_devname != NULL)
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my_devname = &my_devname[5];
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else
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my_devname = devname;
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subsystem = argv[1];
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logging_init("udev_run_devd");
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fd = open("/dev/null", O_RDWR);
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if (fd >= 0) {
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dup2(fd, STDOUT_FILENO);
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dup2(fd, STDIN_FILENO);
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dup2(fd, STDERR_FILENO);
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close(fd);
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}
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dbg("running dev.d directory");
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sprintf(dirname, "/etc/dev.d/%s", my_devname);
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run_directory(dirname, ".dev", subsystem);
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sprintf(dirname, "/etc/dev.d/%s", subsystem);
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run_directory(dirname, ".dev", subsystem);
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run_directory("/etc/dev.d/default", ".dev", subsystem);
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exit(0);
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}
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