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/*
* udevinitsend.c
*
* Userspace devfs
*
* Copyright (C) 2004, 2005 Hannes Reinecke <hare@suse.de>
*
* 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.
*
*/
#include <stdio.h>
#include <stddef.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <sys/un.h>
#include <dirent.h>
#include "udev.h"
#include "udev_version.h"
#include "udevd.h"
#include "logging.h"
#ifdef USE_LOG
void log_message (int level, const char *format, ...)
{
va_list args;
va_start(args, format);
vsyslog(level, format, args);
va_end(args);
}
#endif
/*
* udevsend
*
* Scan a file, write all variables into the msgbuf and
* fires the message to udevd.
*/
static int udevsend(char *filename, int sock, int disable_loop_detection)
{
static struct udevd_msg usend_msg;
int usend_msg_len;
int bufpos = 0;
struct stat statbuf;
int fd;
char *fdmap, *ls, *le, *ch;
struct sockaddr_un saddr;
socklen_t addrlen;
int retval = 0;
if (stat(filename,&statbuf) < 0) {
dbg("cannot stat %s: %s\n", filename, strerror(errno));
return 1;
}
fd = open(filename,O_RDONLY);
if (fd < 0)
return 1;
fdmap = mmap(0, statbuf.st_size,
PROT_READ, MAP_PRIVATE, fd, 0);
close(fd);
if (fdmap == MAP_FAILED) {
dbg("mmap failed, errno %d\n", errno);
return 1;
}
memset(&saddr, 0x00, sizeof(struct sockaddr_un));
saddr.sun_family = AF_LOCAL;
/* use abstract namespace for socket path */
strcpy(&saddr.sun_path[1], UDEVD_SOCK_PATH);
addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
memset(&usend_msg, 0x00, sizeof(struct udevd_msg));
strcpy(usend_msg.magic, UDEV_MAGIC);
usend_msg.type = UDEVD_INITSEND;
ls = fdmap;
ch = le = ls;
while (*ch && ch < fdmap + statbuf.st_size) {
le = strchr(ch, '\n');
if (!le)
break;
ch = strchr(ch, '=');
if (!ch)
break;
/* prevent loops in the scripts we execute */
if (strncmp(ls, "UDEVD_EVENT=", 12) == 0) {
if (!disable_loop_detection) {
dbg("event already handled by udev\n");
retval = -1;
break;
}
goto loop_end;
}
/* omit shell-generated keys */
if (ls[0] == '_' && ls[1] == '=') {
goto loop_end;
}
if (ch < le) {
strncpy(&usend_msg.envbuf[bufpos],ls,(ch - ls) + 1);
bufpos += (ch - ls) + 1;
if (ch[1] == '\'' && le[-1] == '\'') {
strncpy(&usend_msg.envbuf[bufpos],ch + 2, (le - ch) -3);
bufpos += (le - ch) - 3;
} else {
strncpy(&usend_msg.envbuf[bufpos],ch, (le - ch));
bufpos += (le - ch);
}
bufpos++;
}
loop_end:
ch = le + 1;
ls = ch;
}
munmap(fdmap, statbuf.st_size);
usend_msg_len = offsetof(struct udevd_msg, envbuf) + bufpos;
dbg("usend_msg_len=%i", usend_msg_len);
if (!retval) {
retval = sendto(sock, &usend_msg, usend_msg_len, 0, (struct sockaddr *)&saddr, addrlen);
if (retval < 0) {
dbg("error sending message (%s)", strerror(errno));
}
}
return retval;
}
int main(int argc, char *argv[], char *envp[])
{
static const char short_options[] = "d:f:lVh";
int option;
char *event_dir = NULL;
char *event_file = NULL;
DIR *dirstream;
struct dirent *direntry;
int retval = 1;
int disable_loop_detection = 0;
int sock;
logging_init("udevinitsend");
dbg("version %s", UDEV_VERSION);
/* get command line options */
while (1) {
option = getopt(argc, argv, short_options);
if (option == -1)
break;
dbg("option '%c': ", option);
switch (option) {
case 'd':
dbg("scan directory %s\n", optarg);
event_dir = optarg;
break;
case 'f':
dbg("use event file %s\n", optarg);
event_file = optarg;
break;
case 'l':
dbg("disable loop detection, ignore UDEVD_EVENT\n");
disable_loop_detection = 1;
break;
case 'h':
retval = 0;
}
}
sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
if (sock == -1) {
dbg("error getting socket");
return 1;
}
if (event_dir) {
dirstream = opendir(event_dir);
if (!dirstream) {
info("error opening directory %s: %s\n",
event_dir, strerror(errno));
return 1;
}
chdir(event_dir);
while ((direntry = readdir(dirstream)) != NULL) {
if (!strcmp(direntry->d_name,".") ||
!strcmp(direntry->d_name,".."))
continue;
retval = udevsend(direntry->d_name, sock, disable_loop_detection);
}
closedir(dirstream);
} else if (event_file) {
retval = udevsend(event_file, sock, disable_loop_detection);
}
if (sock != -1)
close(sock);
return retval;
}
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