summaryrefslogtreecommitdiff
path: root/udev/udev-rules.c
diff options
context:
space:
mode:
Diffstat (limited to 'udev/udev-rules.c')
-rw-r--r--udev/udev-rules.c235
1 files changed, 10 insertions, 225 deletions
diff --git a/udev/udev-rules.c b/udev/udev-rules.c
index 6d7e3f4fca..62624bbc85 100644
--- a/udev/udev-rules.c
+++ b/udev/udev-rules.c
@@ -24,13 +24,8 @@
#include <ctype.h>
#include <unistd.h>
#include <errno.h>
-#include <syslog.h>
#include <dirent.h>
#include <fnmatch.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/wait.h>
-#include <sys/stat.h>
#include "udev.h"
@@ -234,223 +229,6 @@ static int get_format_len(struct udev *udev, char **str)
return -1;
}
-static int run_program(struct udev_device *dev, const char *command,
- char *result, size_t ressize, size_t *reslen)
-{
- struct udev *udev = udev_device_get_udev(dev);
- int status;
- char **envp;
- int outpipe[2] = {-1, -1};
- int errpipe[2] = {-1, -1};
- pid_t pid;
- char arg[UTIL_PATH_SIZE];
- char program[UTIL_PATH_SIZE];
- char *argv[(sizeof(arg) / 2) + 1];
- int devnull;
- int i;
- int err = 0;
-
- /* build argv from command */
- util_strlcpy(arg, command, sizeof(arg));
- i = 0;
- if (strchr(arg, ' ') != NULL) {
- char *pos = arg;
-
- while (pos != NULL && pos[0] != '\0') {
- if (pos[0] == '\'') {
- /* do not separate quotes */
- pos++;
- argv[i] = strsep(&pos, "\'");
- while (pos != NULL && pos[0] == ' ')
- pos++;
- } else {
- argv[i] = strsep(&pos, " ");
- }
- dbg(udev, "arg[%i] '%s'\n", i, argv[i]);
- i++;
- }
- argv[i] = NULL;
- } else {
- argv[0] = arg;
- argv[1] = NULL;
- }
- info(udev, "'%s'\n", command);
-
- /* prepare pipes from child to parent */
- if (result != NULL || udev_get_log_priority(udev) >= LOG_INFO) {
- if (pipe(outpipe) != 0) {
- err(udev, "pipe failed: %m\n");
- return -1;
- }
- }
- if (udev_get_log_priority(udev) >= LOG_INFO) {
- if (pipe(errpipe) != 0) {
- err(udev, "pipe failed: %m\n");
- return -1;
- }
- }
-
- /* allow programs in /lib/udev/ to be called without the path */
- if (strchr(argv[0], '/') == NULL) {
- util_strlcpy(program, UDEV_PREFIX "/lib/udev/", sizeof(program));
- util_strlcat(program, argv[0], sizeof(program));
- argv[0] = program;
- }
-
- envp = udev_device_get_properties_envp(dev);
-
- pid = fork();
- switch(pid) {
- case 0:
- /* child closes parent ends of pipes */
- if (outpipe[READ_END] > 0)
- close(outpipe[READ_END]);
- if (errpipe[READ_END] > 0)
- close(errpipe[READ_END]);
-
- /* discard child output or connect to pipe */
- devnull = open("/dev/null", O_RDWR);
- if (devnull > 0) {
- dup2(devnull, STDIN_FILENO);
- if (outpipe[WRITE_END] < 0)
- dup2(devnull, STDOUT_FILENO);
- if (errpipe[WRITE_END] < 0)
- dup2(devnull, STDERR_FILENO);
- close(devnull);
- } else
- err(udev, "open /dev/null failed: %m\n");
- if (outpipe[WRITE_END] > 0) {
- dup2(outpipe[WRITE_END], STDOUT_FILENO);
- close(outpipe[WRITE_END]);
- }
- if (errpipe[WRITE_END] > 0) {
- dup2(errpipe[WRITE_END], STDERR_FILENO);
- close(errpipe[WRITE_END]);
- }
- execve(argv[0], argv, envp);
- if (errno == ENOENT || errno == ENOTDIR) {
- /* may be on a filesytem which is not mounted right now */
- info(udev, "program '%s' not found\n", argv[0]);
- } else {
- /* other problems */
- err(udev, "exec of program '%s' failed\n", argv[0]);
- }
- _exit(1);
- case -1:
- err(udev, "fork of '%s' failed: %m\n", argv[0]);
- return -1;
- default:
- /* read from child if requested */
- if (outpipe[READ_END] > 0 || errpipe[READ_END] > 0) {
- ssize_t count;
- size_t respos = 0;
-
- /* parent closes child ends of pipes */
- if (outpipe[WRITE_END] > 0)
- close(outpipe[WRITE_END]);
- if (errpipe[WRITE_END] > 0)
- close(errpipe[WRITE_END]);
-
- /* read child output */
- while (outpipe[READ_END] > 0 || errpipe[READ_END] > 0) {
- int fdcount;
- fd_set readfds;
-
- FD_ZERO(&readfds);
- if (outpipe[READ_END] > 0)
- FD_SET(outpipe[READ_END], &readfds);
- if (errpipe[READ_END] > 0)
- FD_SET(errpipe[READ_END], &readfds);
- fdcount = select(UDEV_MAX(outpipe[READ_END], errpipe[READ_END])+1, &readfds, NULL, NULL, NULL);
- if (fdcount < 0) {
- if (errno == EINTR)
- continue;
- err = -1;
- break;
- }
-
- /* get stdout */
- if (outpipe[READ_END] > 0 && FD_ISSET(outpipe[READ_END], &readfds)) {
- char inbuf[1024];
- char *pos;
- char *line;
-
- count = read(outpipe[READ_END], inbuf, sizeof(inbuf)-1);
- if (count <= 0) {
- close(outpipe[READ_END]);
- outpipe[READ_END] = -1;
- if (count < 0) {
- err(udev, "stdin read failed: %m\n");
- err = -1;
- }
- continue;
- }
- inbuf[count] = '\0';
-
- /* store result for rule processing */
- if (result) {
- if (respos + count < ressize) {
- memcpy(&result[respos], inbuf, count);
- respos += count;
- } else {
- err(udev, "ressize %ld too short\n", (long)ressize);
- err = -1;
- }
- }
- pos = inbuf;
- while ((line = strsep(&pos, "\n")))
- if (pos || line[0] != '\0')
- info(udev, "'%s' (stdout) '%s'\n", argv[0], line);
- }
-
- /* get stderr */
- if (errpipe[READ_END] > 0 && FD_ISSET(errpipe[READ_END], &readfds)) {
- char errbuf[1024];
- char *pos;
- char *line;
-
- count = read(errpipe[READ_END], errbuf, sizeof(errbuf)-1);
- if (count <= 0) {
- close(errpipe[READ_END]);
- errpipe[READ_END] = -1;
- if (count < 0)
- err(udev, "stderr read failed: %m\n");
- continue;
- }
- errbuf[count] = '\0';
- pos = errbuf;
- while ((line = strsep(&pos, "\n")))
- if (pos || line[0] != '\0')
- info(udev, "'%s' (stderr) '%s'\n", argv[0], line);
- }
- }
- if (outpipe[READ_END] > 0)
- close(outpipe[READ_END]);
- if (errpipe[READ_END] > 0)
- close(errpipe[READ_END]);
-
- /* return the childs stdout string */
- if (result) {
- result[respos] = '\0';
- dbg(udev, "result='%s'\n", result);
- if (reslen)
- *reslen = respos;
- }
- }
- waitpid(pid, &status, 0);
- if (WIFEXITED(status)) {
- info(udev, "'%s' returned with status %i\n", argv[0], WEXITSTATUS(status));
- if (WEXITSTATUS(status) != 0)
- err = -1;
- } else {
- err(udev, "'%s' abnormal exit\n", argv[0]);
- err = -1;
- }
- }
-
- return err;
-}
-
static int import_property_from_string(struct udev_device *dev, char *line)
{
struct udev *udev = udev_device_get_udev(dev);
@@ -544,11 +322,14 @@ static int import_file_into_env(struct udev_device *dev, const char *filename)
static int import_program_into_env(struct udev_device *dev, const char *program)
{
+ struct udev *udev = udev_device_get_udev(dev);
+ char **envp;
char result[2048];
size_t reslen;
char *line;
- if (run_program(dev, program, result, sizeof(result), &reslen) != 0)
+ envp = udev_device_get_properties_envp(dev);
+ if (run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
return -1;
line = result;
@@ -612,10 +393,12 @@ int udev_rules_run(struct udev_event *event)
udev_monitor_unref(monitor);
} else {
char program[UTIL_PATH_SIZE];
+ char **envp;
util_strlcpy(program, cmd, sizeof(program));
udev_rules_apply_format(event, program, sizeof(program));
- if (run_program(event->dev, program, NULL, 0, NULL) != 0) {
+ envp = udev_device_get_properties_envp(event->dev);
+ if (run_program(event->udev, program, envp, NULL, 0, NULL) != 0) {
if (!udev_list_entry_get_flag(list_entry))
err = -1;
}
@@ -1372,11 +1155,13 @@ try_parent:
/* execute external program */
if (rule->program.operation != KEY_OP_UNSET) {
char program[UTIL_PATH_SIZE];
+ char **envp;
char result[UTIL_PATH_SIZE];
util_strlcpy(program, key_val(rule, &rule->program), sizeof(program));
udev_rules_apply_format(event, program, sizeof(program));
- if (run_program(event->dev, program, result, sizeof(result), NULL) != 0) {
+ envp = udev_device_get_properties_envp(dev);
+ if (run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
dbg(event->udev, "PROGRAM is false\n");
event->program_result[0] = '\0';
if (rule->program.operation != KEY_OP_NOMATCH)
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-13 12:21:06 +0000