/*
- * udevmonitor.c
- *
* Copyright (C) 2004-2006 Kay Sievers <kay.sievers@vrfy.org>
*
* This program is free software; you can redistribute it and/or modify it
*
* 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.
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
+#include <getopt.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/un.h>
{
struct sockaddr_un saddr;
socklen_t addrlen;
- const int feature_on = 1;
int retval;
memset(&saddr, 0x00, sizeof(saddr));
saddr.sun_family = AF_LOCAL;
/* use abstract namespace for socket path */
strcpy(&saddr.sun_path[1], "/org/kernel/udev/monitor");
- addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
+ addrlen = offsetof(struct sockaddr_un, sun_path) + 1 + strlen(&saddr.sun_path[1]);
udev_monitor_sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
if (udev_monitor_sock == -1) {
return -1;
}
- /* enable receiving of the sender credentials */
- setsockopt(udev_monitor_sock, SOL_SOCKET, SO_PASSCRED, &feature_on, sizeof(feature_on));
-
return 0;
}
udev_exit = 1;
}
-int main(int argc, char *argv[])
+static const char *search_key(const char *searchkey, const char *buf, size_t buflen)
+{
+ size_t bufpos = 0;
+ size_t searchkeylen = strlen(searchkey);
+
+ while (bufpos < buflen) {
+ const char *key;
+ int keylen;
+
+ key = &buf[bufpos];
+ keylen = strlen(key);
+ if (keylen == 0)
+ break;
+ if ((strncmp(searchkey, key, searchkeylen) == 0) && key[searchkeylen] == '=')
+ return &key[searchkeylen + 1];
+ bufpos += keylen + 1;
+ }
+ return NULL;
+}
+
+int udevmonitor(int argc, char *argv[], char *envp[])
{
struct sigaction act;
+ int option;
int env = 0;
+ int kernel = 0;
+ int udev = 0;
fd_set readfds;
- int i;
int retval = 0;
- for (i = 1 ; i < argc; i++) {
- char *arg = argv[i];
- if (strcmp(arg, "--env") == 0 || strcmp(arg, "-e") == 0)
+ static const struct option options[] = {
+ { "environment", 0, NULL, 'e' },
+ { "kernel", 0, NULL, 'k' },
+ { "udev", 0, NULL, 'u' },
+ { "help", 0, NULL, 'h' },
+ {}
+ };
+
+ while (1) {
+ option = getopt_long(argc, argv, "ekuh", options, NULL);
+ if (option == -1)
+ break;
+
+ switch (option) {
+ case 'e':
env = 1;
- else if (strcmp(arg, "--help") == 0 || strcmp(arg, "-h") == 0){
- printf("Usage: udevmonitor [--help] [--env]\n"
- " --env print the whole event environment\n"
- " --help print this help text\n\n");
- exit(0);
- } else {
- fprintf(stderr, "unrecognized option '%s'\n", arg);
- exit(1);
+ break;
+ case 'k':
+ kernel = 1;
+ break;
+ case 'u':
+ udev = 1;
+ break;
+ case 'h':
+ printf("Usage: udevadm monitor [--environment] [--kernel] [--udev] [--help]\n"
+ " --env print the whole event environment\n"
+ " --kernel print kernel uevents\n"
+ " --udev print udev events\n"
+ " --help print this help text\n\n");
+ default:
+ goto out;
}
}
- if (getuid() != 0) {
- fprintf(stderr, "root privileges required\n");
- exit(2);
+ if (!kernel && !udev) {
+ kernel = 1;
+ udev =1;
+ }
+
+ if (getuid() != 0 && kernel) {
+ fprintf(stderr, "root privileges needed to subscribe to kernel events\n");
+ goto out;
}
/* set signal handlers */
sigaction(SIGINT, &act, NULL);
sigaction(SIGTERM, &act, NULL);
- retval = init_udev_monitor_socket();
- if (retval)
- goto out;
-
- retval = init_uevent_netlink_sock();
- if (retval)
- goto out;
-
- printf("udevmonitor prints the received event from the kernel [UEVENT]\n"
- "and the event which udev sends out after rule processing [UDEV]\n\n");
+ printf("udevmonitor will print the received events for:\n");
+ if (udev) {
+ retval = init_udev_monitor_socket();
+ if (retval)
+ goto out;
+ printf("UDEV the event which udev sends out after rule processing\n");
+ }
+ if (kernel) {
+ retval = init_uevent_netlink_sock();
+ if (retval)
+ goto out;
+ printf("UEVENT the kernel uevent\n");
+ }
+ printf("\n");
while (!udev_exit) {
char buf[UEVENT_BUFFER_SIZE*2];
ssize_t buflen;
+ ssize_t bufpos;
+ ssize_t keys;
int fdcount;
struct timeval tv;
struct timezone tz;
char timestr[64];
+ const char *source = NULL;
+ const char *devpath, *action, *subsys;
buflen = 0;
FD_ZERO(&readfds);
if ((uevent_netlink_sock >= 0) && FD_ISSET(uevent_netlink_sock, &readfds)) {
buflen = recv(uevent_netlink_sock, &buf, sizeof(buf), 0);
- if (buflen <= 0) {
+ if (buflen <= 0) {
fprintf(stderr, "error receiving uevent message: %s\n", strerror(errno));
continue;
}
- printf("UEVENT[%s] %s\n", timestr, buf);
+ source = "UEVENT";
}
if ((udev_monitor_sock >= 0) && FD_ISSET(udev_monitor_sock, &readfds)) {
buflen = recv(udev_monitor_sock, &buf, sizeof(buf), 0);
- if (buflen <= 0) {
+ if (buflen <= 0) {
fprintf(stderr, "error receiving udev message: %s\n", strerror(errno));
continue;
}
- printf("UDEV [%s] %s\n", timestr, buf);
+ source = "UDEV ";
}
if (buflen == 0)
continue;
+ keys = strlen(buf) + 1; /* start of payload */
+ devpath = search_key("DEVPATH", &buf[keys], buflen);
+ action = search_key("ACTION", &buf[keys], buflen);
+ subsys = search_key("SUBSYSTEM", &buf[keys], buflen);
+ printf("%s[%s] %-8s %s (%s)\n", source, timestr, action, devpath, subsys);
+
/* print environment */
+ bufpos = keys;
if (env) {
- size_t bufpos;
-
- /* start of payload */
- bufpos = strlen(buf) + 1;
-
- while (bufpos < (size_t)buflen) {
+ while (bufpos < buflen) {
int keylen;
char *key;
close(udev_monitor_sock);
if (retval)
- return 3;
+ return 1;
return 0;
}
~ianmdlvl / elogind.git / blobdiff