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Diffstat (limited to 'src/udev/udevadm-monitor.c')
-rw-r--r--src/udev/udevadm-monitor.c96
1 files changed, 41 insertions, 55 deletions
diff --git a/src/udev/udevadm-monitor.c b/src/udev/udevadm-monitor.c
index a390ee6c34..6022e8db82 100644
--- a/src/udev/udevadm-monitor.c
+++ b/src/udev/udevadm-monitor.c
@@ -33,6 +33,7 @@
#include <linux/netlink.h>
#include "udev.h"
+#include "udev-util.h"
static bool udev_exit;
@@ -64,43 +65,48 @@ static void print_device(struct udev_device *device, const char *source, int pro
}
}
+static void help(void) {
+ printf("Usage: udevadm monitor [--property] [--kernel] [--udev] [--help]\n"
+ " -p,--property print the event properties\n"
+ " -k,--kernel print kernel uevents\n"
+ " -u,--udev print udev events\n"
+ " -s,--subsystem-match=SUBSYSTEM[/DEVTYPE] filter events by subsystem\n"
+ " -t,--tag-match=TAG filter events by tag\n"
+ " -h,--help\n\n");
+}
+
static int adm_monitor(struct udev *udev, int argc, char *argv[])
{
- struct sigaction act;
+ struct sigaction act = {};
sigset_t mask;
- int option;
bool prop = false;
bool print_kernel = false;
bool print_udev = false;
- struct udev_list subsystem_match_list;
- struct udev_list tag_match_list;
- struct udev_monitor *udev_monitor = NULL;
- struct udev_monitor *kernel_monitor = NULL;
- int fd_ep = -1;
+ _cleanup_udev_list_cleanup_ struct udev_list subsystem_match_list;
+ _cleanup_udev_list_cleanup_ struct udev_list tag_match_list;
+ _cleanup_udev_monitor_unref_ struct udev_monitor *udev_monitor = NULL;
+ _cleanup_udev_monitor_unref_ struct udev_monitor *kernel_monitor = NULL;
+ _cleanup_close_ int fd_ep = -1;
int fd_kernel = -1, fd_udev = -1;
struct epoll_event ep_kernel, ep_udev;
- int rc = 0;
+ int c;
static const struct option options[] = {
- { "property", no_argument, NULL, 'p' },
- { "environment", no_argument, NULL, 'e' },
- { "kernel", no_argument, NULL, 'k' },
- { "udev", no_argument, NULL, 'u' },
+ { "property", no_argument, NULL, 'p' },
+ { "environment", no_argument, NULL, 'e' }, /* alias for -p */
+ { "kernel", no_argument, NULL, 'k' },
+ { "udev", no_argument, NULL, 'u' },
{ "subsystem-match", required_argument, NULL, 's' },
- { "tag-match", required_argument, NULL, 't' },
- { "help", no_argument, NULL, 'h' },
+ { "tag-match", required_argument, NULL, 't' },
+ { "help", no_argument, NULL, 'h' },
{}
};
udev_list_init(udev, &subsystem_match_list, true);
udev_list_init(udev, &tag_match_list, true);
- for (;;) {
- option = getopt_long(argc, argv, "pekus:t:h", options, NULL);
- if (option == -1)
- break;
-
- switch (option) {
+ while((c = getopt_long(argc, argv, "pekus:t:h", options, NULL)) >= 0)
+ switch (c) {
case 'p':
case 'e':
prop = true;
@@ -129,19 +135,11 @@ static int adm_monitor(struct udev *udev, int argc, char *argv[])
udev_list_entry_add(&tag_match_list, optarg, NULL);
break;
case 'h':
- printf("Usage: udevadm monitor [--property] [--kernel] [--udev] [--help]\n"
- " --property print the event properties\n"
- " --kernel print kernel uevents\n"
- " --udev print udev events\n"
- " --subsystem-match=<subsystem[/devtype]> filter events by subsystem\n"
- " --tag-match=<tag> filter events by tag\n"
- " --help\n\n");
- goto out;
+ help();
+ return 0;
default:
- rc = 1;
- goto out;
+ return 1;
}
- }
if (!print_kernel && !print_udev) {
print_kernel = true;
@@ -149,9 +147,7 @@ static int adm_monitor(struct udev *udev, int argc, char *argv[])
}
/* set signal handlers */
- memset(&act, 0x00, sizeof(struct sigaction));
act.sa_handler = sig_handler;
- sigemptyset(&act.sa_mask);
act.sa_flags = SA_RESTART;
sigaction(SIGINT, &act, NULL);
sigaction(SIGTERM, &act, NULL);
@@ -162,8 +158,8 @@ static int adm_monitor(struct udev *udev, int argc, char *argv[])
fd_ep = epoll_create1(EPOLL_CLOEXEC);
if (fd_ep < 0) {
- log_error("error creating epoll fd: %m\n");
- goto out;
+ log_error("error creating epoll fd: %m");
+ return 1;
}
printf("monitor will print the received events for:\n");
@@ -173,8 +169,7 @@ static int adm_monitor(struct udev *udev, int argc, char *argv[])
udev_monitor = udev_monitor_new_from_netlink(udev, "udev");
if (udev_monitor == NULL) {
fprintf(stderr, "error: unable to create netlink socket\n");
- rc = 1;
- goto out;
+ return 1;
}
udev_monitor_set_receive_buffer_size(udev_monitor, 128*1024*1024);
fd_udev = udev_monitor_get_fd(udev_monitor);
@@ -196,16 +191,15 @@ static int adm_monitor(struct udev *udev, int argc, char *argv[])
if (udev_monitor_enable_receiving(udev_monitor) < 0) {
fprintf(stderr, "error: unable to subscribe to udev events\n");
- rc = 2;
- goto out;
+ return 2;
}
memset(&ep_udev, 0, sizeof(struct epoll_event));
ep_udev.events = EPOLLIN;
ep_udev.data.fd = fd_udev;
if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_udev, &ep_udev) < 0) {
- log_error("fail to add fd to epoll: %m\n");
- goto out;
+ log_error("fail to add fd to epoll: %m");
+ return 2;
}
printf("UDEV - the event which udev sends out after rule processing\n");
@@ -217,8 +211,7 @@ static int adm_monitor(struct udev *udev, int argc, char *argv[])
kernel_monitor = udev_monitor_new_from_netlink(udev, "kernel");
if (kernel_monitor == NULL) {
fprintf(stderr, "error: unable to create netlink socket\n");
- rc = 3;
- goto out;
+ return 3;
}
udev_monitor_set_receive_buffer_size(kernel_monitor, 128*1024*1024);
fd_kernel = udev_monitor_get_fd(kernel_monitor);
@@ -232,16 +225,15 @@ static int adm_monitor(struct udev *udev, int argc, char *argv[])
if (udev_monitor_enable_receiving(kernel_monitor) < 0) {
fprintf(stderr, "error: unable to subscribe to kernel events\n");
- rc = 4;
- goto out;
+ return 4;
}
memset(&ep_kernel, 0, sizeof(struct epoll_event));
ep_kernel.events = EPOLLIN;
ep_kernel.data.fd = fd_kernel;
if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_kernel, &ep_kernel) < 0) {
- log_error("fail to add fd to epoll: %m\n");
- goto out;
+ log_error("fail to add fd to epoll: %m");
+ return 5;
}
printf("KERNEL - the kernel uevent\n");
@@ -280,14 +272,8 @@ static int adm_monitor(struct udev *udev, int argc, char *argv[])
}
}
}
-out:
- if (fd_ep >= 0)
- close(fd_ep);
- udev_monitor_unref(udev_monitor);
- udev_monitor_unref(kernel_monitor);
- udev_list_cleanup(&subsystem_match_list);
- udev_list_cleanup(&tag_match_list);
- return rc;
+
+ return 0;
}
const struct udevadm_cmd udevadm_monitor = {
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-13 21:40:26 +0000