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-rw-r--r--udevtrigger.c184
1 files changed, 168 insertions, 16 deletions
diff --git a/udevtrigger.c b/udevtrigger.c
index 09ef60addb..9a1e82887b 100644
--- a/udevtrigger.c
+++ b/udevtrigger.c
@@ -22,19 +22,18 @@
#include <string.h>
#include <stdio.h>
#include <unistd.h>
+#include <getopt.h>
#include <errno.h>
#include <dirent.h>
#include <fcntl.h>
#include <syslog.h>
+#include <fnmatch.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "udev.h"
#include "udevd.h"
-static int verbose;
-static int dry_run;
-
#ifdef USE_LOG
void log_message(int priority, const char *format, ...)
{
@@ -49,6 +48,9 @@ void log_message(int priority, const char *format, ...)
}
#endif
+static int verbose;
+static int dry_run;
+
/* list of devices that we should run last due to any one of a number of reasons */
static char *last_list[] = {
"/class/block/md",
@@ -69,6 +71,11 @@ LIST_HEAD(device_first_list);
LIST_HEAD(device_default_list);
LIST_HEAD(device_last_list);
+LIST_HEAD(filter_subsytem_match_list);
+LIST_HEAD(filter_subsytem_nomatch_list);
+LIST_HEAD(filter_attr_match_list);
+LIST_HEAD(filter_attr_nomatch_list);
+
static int device_list_insert(const char *path)
{
struct list_head *device_list = &device_default_list;
@@ -164,6 +171,93 @@ static int is_device(const char *path)
return 1;
}
+static int subsystem_filtered(const char *subsystem)
+{
+ struct name_entry *loop_name;
+
+ /* skip devices matching the listed subsystems */
+ list_for_each_entry(loop_name, &filter_subsytem_nomatch_list, node)
+ if (fnmatch(subsystem, loop_name->name, 0) == 0)
+ return 1;
+
+ /* skip devices not matching the listed subsystems */
+ if (!list_empty(&filter_subsytem_match_list)) {
+ list_for_each_entry(loop_name, &filter_subsytem_match_list, node)
+ if (fnmatch(subsystem, loop_name->name, 0) == 0)
+ return 0;
+ return 1;
+ }
+
+ return 0;
+}
+
+static int attr_match(const char *path, const char *attr_value)
+{
+ char attr[NAME_SIZE];
+ char file[PATH_SIZE];
+ char *match_value;
+
+ strlcpy(attr, attr_value, sizeof(attr));
+
+ /* separate attr and match value */
+ match_value = strchr(attr, '=');
+ if (match_value != NULL) {
+ match_value[0] = '\0';
+ match_value = &match_value[1];
+ }
+
+ strlcpy(file, path, sizeof(file));
+ strlcat(file, "/", sizeof(file));
+ strlcat(file, attr, sizeof(file));
+
+ if (match_value != NULL) {
+ /* match file content */
+ char value[NAME_SIZE];
+ int fd;
+ ssize_t size;
+
+ fd = open(file, O_RDONLY);
+ if (fd < 0)
+ return 0;
+ size = read(fd, value, sizeof(value));
+ close(fd);
+ if (size < 0)
+ return 0;
+ value[size] = '\0';
+ remove_trailing_chars(value, '\n');
+
+ /* match if attribute value matches */
+ if (fnmatch(match_value, value, 0) == 0)
+ return 1;
+ } else {
+ /* match if attribute exists */
+ struct stat statbuf;
+
+ if (stat(file, &statbuf) == 0)
+ return 1;
+ }
+ return 0;
+}
+
+static int attr_filtered(const char *path)
+{
+ struct name_entry *loop_name;
+
+ /* skip devices matching the listed sysfs attributes */
+ list_for_each_entry(loop_name, &filter_attr_nomatch_list, node)
+ if (attr_match(path, loop_name->name))
+ return 1;
+
+ /* skip devices not matching the listed sysfs attributes */
+ if (!list_empty(&filter_attr_match_list)) {
+ list_for_each_entry(loop_name, &filter_attr_match_list, node)
+ if (attr_match(path, loop_name->name))
+ return 0;
+ return 1;
+ }
+ return 0;
+}
+
static void scan_bus(void)
{
char base[PATH_SIZE];
@@ -183,6 +277,9 @@ static void scan_bus(void)
if (dent->d_name[0] == '.')
continue;
+ if (subsystem_filtered(dent->d_name))
+ continue;
+
strlcpy(dirname, base, sizeof(dirname));
strlcat(dirname, "/", sizeof(dirname));
strlcat(dirname, dent->d_name, sizeof(dirname));
@@ -200,7 +297,8 @@ static void scan_bus(void)
strlcpy(dirname2, dirname, sizeof(dirname2));
strlcat(dirname2, "/", sizeof(dirname2));
strlcat(dirname2, dent2->d_name, sizeof(dirname2));
-
+ if (attr_filtered(dirname2))
+ continue;
if (is_device(dirname2))
device_list_insert(dirname2);
}
@@ -224,6 +322,9 @@ static void scan_block(void)
if (stat(base, &statbuf) == 0)
return;
+ if (subsystem_filtered("block"))
+ return;
+
strlcpy(base, sysfs_path, sizeof(base));
strlcat(base, "/block", sizeof(base));
@@ -240,6 +341,8 @@ static void scan_block(void)
strlcpy(dirname, base, sizeof(dirname));
strlcat(dirname, "/", sizeof(dirname));
strlcat(dirname, dent->d_name, sizeof(dirname));
+ if (attr_filtered(dirname))
+ continue;
if (is_device(dirname))
device_list_insert(dirname);
else
@@ -260,6 +363,8 @@ static void scan_block(void)
strlcpy(dirname2, dirname, sizeof(dirname2));
strlcat(dirname2, "/", sizeof(dirname2));
strlcat(dirname2, dent2->d_name, sizeof(dirname2));
+ if (attr_filtered(dirname2))
+ continue;
if (is_device(dirname2))
device_list_insert(dirname2);
}
@@ -289,6 +394,9 @@ static void scan_class(void)
if (dent->d_name[0] == '.')
continue;
+ if (subsystem_filtered(dent->d_name))
+ continue;
+
strlcpy(dirname, base, sizeof(dirname));
strlcat(dirname, "/", sizeof(dirname));
strlcat(dirname, dent->d_name, sizeof(dirname));
@@ -306,6 +414,8 @@ static void scan_class(void)
strlcpy(dirname2, dirname, sizeof(dirname2));
strlcat(dirname2, "/", sizeof(dirname2));
strlcat(dirname2, dent2->d_name, sizeof(dirname2));
+ if (attr_filtered(dirname2))
+ continue;
if (is_device(dirname2))
device_list_insert(dirname2);
}
@@ -356,36 +466,73 @@ static void scan_failed(void)
int main(int argc, char *argv[], char *envp[])
{
- int i;
int failed = 0;
+ int option;
+ int longindex;
+ struct option options[] = {
+ { "verbose", 0, NULL, 'v' },
+ { "dry-run", 0, NULL, 'n' },
+ { "retry-failed", 0, NULL, 'F' },
+ { "help", 0, NULL, 'h' },
+ { "subsystem-match", 1, NULL, 's' },
+ { "subsystem-nomatch", 1, NULL, 'S' },
+ { "attr-match", 1, NULL, 'a' },
+ { "attr-nomatch", 1, NULL, 'A' },
+ {}
+ };
logging_init("udevtrigger");
udev_config_init();
dbg("version %s", UDEV_VERSION);
sysfs_init();
- for (i = 1 ; i < argc; i++) {
- char *arg = argv[i];
+ while (1) {
+ option = getopt_long(argc, argv, "vnFhs:S:a:A:", options, &longindex);
+ if (option == -1)
+ break;
- if (strcmp(arg, "--verbose") == 0 || strcmp(arg, "-v") == 0) {
+ switch (option) {
+ case 'v':
verbose = 1;
- } else if (strcmp(arg, "--dry-run") == 0 || strcmp(arg, "-n") == 0) {
+ break;
+ case 'n':
dry_run = 1;
- } else if (strcmp(arg, "--retry-failed") == 0 || strcmp(arg, "-F") == 0) {
+ break;
+ case 'F':
failed = 1;
- } else if (strcmp(arg, "--help") == 0 || strcmp(arg, "-h") == 0) {
- printf("Usage: udevtrigger [--help] [--verbose] [--dry-run] [--retry-failed]\n");
+ break;
+ case 's':
+ name_list_add(&filter_subsytem_match_list, optarg, 0);
+ break;
+ case 'S':
+ name_list_add(&filter_subsytem_nomatch_list, optarg, 0);
+ break;
+ case 'a':
+ name_list_add(&filter_attr_match_list, optarg, 0);
+ break;
+ case 'A':
+ name_list_add(&filter_attr_nomatch_list, optarg, 0);
+ break;
+ case 'h':
+ printf("Usage: udevtrigger OPTIONS\n"
+ " --verbose print the list of devices which will be triggered\n"
+ " --dry-run do not actually trigger the event\n"
+ " --retry-failed trigger only the events which are failed during a previous run\n"
+ " --subsystem-match select only devices from the specified subystem\n"
+ " --subsystem-nomatch exclude devices from the specified subystem\n"
+ " --attr-match=<file[=<value>]> select only devices with a matching sysfs attribute\n"
+ " --attr-nomatch=<file[=<value>]> exclude devices with a matching sysfs attribute\n"
+ " --help print this text\n"
+ "\n");
+ goto exit;
+ default:
goto exit;
- } else {
- fprintf(stderr, "unrecognized option '%s'\n", arg);
- err("unrecognized option '%s'\n", arg);
}
}
if (failed)
scan_failed();
else {
- /* default action */
scan_bus();
scan_class();
scan_block();
@@ -393,6 +540,11 @@ int main(int argc, char *argv[], char *envp[])
exec_lists();
exit:
+ name_list_cleanup(&filter_subsytem_match_list);
+ name_list_cleanup(&filter_subsytem_nomatch_list);
+ name_list_cleanup(&filter_attr_match_list);
+ name_list_cleanup(&filter_attr_nomatch_list);
+
sysfs_cleanup();
logging_close();
return 0;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-15 13:13:57 +0000