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Diffstat (limited to 'udev_rules.c')
-rw-r--r--udev_rules.c251
1 files changed, 251 insertions, 0 deletions
diff --git a/udev_rules.c b/udev_rules.c
index a8fd18cf8a..400ebad9e3 100644
--- a/udev_rules.c
+++ b/udev_rules.c
@@ -27,12 +27,15 @@
#include <errno.h>
#include <syslog.h>
#include <fnmatch.h>
+#include <sys/socket.h>
+#include <sys/un.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include "udev.h"
#include "udev_rules.h"
+extern char **environ;
/* extract possible {attr} and move str behind it */
static char *get_format_attribute(char **str)
@@ -113,6 +116,219 @@ out:
return 0;
}
+static int run_program(const char *command, const char *subsystem,
+ char *result, size_t ressize, size_t *reslen)
+{
+ int status;
+ int outpipe[2] = {-1, -1};
+ int errpipe[2] = {-1, -1};
+ pid_t pid;
+ char arg[PATH_SIZE];
+ char program[PATH_SIZE];
+ char *argv[(sizeof(arg) / 2) + 1];
+ int devnull;
+ int i;
+ int retval = 0;
+
+ /* build argv from comand */
+ strlcpy(arg, command, sizeof(arg));
+ i = 0;
+ if (strchr(arg, ' ') != NULL) {
+ char *pos = arg;
+
+ while (pos != NULL) {
+ if (pos[0] == '\'') {
+ /* don't separate if in apostrophes */
+ pos++;
+ argv[i] = strsep(&pos, "\'");
+ while (pos != NULL && pos[0] == ' ')
+ pos++;
+ } else {
+ argv[i] = strsep(&pos, " ");
+ }
+ dbg("arg[%i] '%s'", i, argv[i]);
+ i++;
+ }
+ argv[i] = NULL;
+ } else {
+ argv[0] = arg;
+ argv[1] = NULL;
+ }
+ info("'%s'", command);
+
+ /* prepare pipes from child to parent */
+ if (result != NULL || udev_log_priority >= LOG_INFO) {
+ if (pipe(outpipe) != 0) {
+ err("pipe failed: %s", strerror(errno));
+ return -1;
+ }
+ }
+ if (udev_log_priority >= LOG_INFO) {
+ if (pipe(errpipe) != 0) {
+ err("pipe failed: %s", strerror(errno));
+ return -1;
+ }
+ }
+
+ /* allow programs in /lib/udev called without the path */
+ if (strchr(argv[0], '/') == NULL) {
+ strlcpy(program, "/lib/udev/", sizeof(program));
+ strlcat(program, argv[0], sizeof(program));
+ argv[0] = program;
+ }
+
+ 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("open /dev/null failed: %s", strerror(errno));
+ 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]);
+ }
+ execv(argv[0], argv);
+ if (errno == ENOENT || errno == ENOTDIR) {
+ /* may be on a filesytem which is not mounted right now */
+ info("program '%s' not found", argv[0]);
+ } else {
+ /* other problems */
+ err("exec of program '%s' failed", argv[0]);
+ }
+ _exit(1);
+ case -1:
+ err("fork of '%s' failed: %s", argv[0], strerror(errno));
+ 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;
+ retval = -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("stdin read failed: %s", strerror(errno));
+ retval = -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("ressize %ld too short", (long)ressize);
+ retval = -1;
+ }
+ }
+ pos = inbuf;
+ while ((line = strsep(&pos, "\n")))
+ if (pos || line[0] != '\0')
+ info("'%s' (stdout) '%s'", 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("stderr read failed: %s", strerror(errno));
+ continue;
+ }
+ errbuf[count] = '\0';
+ pos = errbuf;
+ while ((line = strsep(&pos, "\n")))
+ if (pos || line[0] != '\0')
+ info("'%s' (stderr) '%s'", 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("result='%s'", result);
+ if (reslen)
+ *reslen = respos;
+ }
+ }
+ waitpid(pid, &status, 0);
+ if (WIFEXITED(status)) {
+ info("'%s' returned with status %i", argv[0], WEXITSTATUS(status));
+ if (WEXITSTATUS(status) != 0)
+ retval = -1;
+ } else {
+ err("'%s' abnormal exit", argv[0]);
+ retval = -1;
+ }
+ }
+
+ return retval;
+}
+
static int import_keys_into_env(struct udevice *udev, const char *buf, size_t bufsize)
{
char line[LINE_SIZE];
@@ -238,6 +454,41 @@ static int import_parent_into_env(struct udevice *udev, const char *filter)
return rc;
}
+static int pass_env_to_socket(const char *sockname, const char *devpath, const char *action)
+{
+ int sock;
+ struct sockaddr_un saddr;
+ socklen_t addrlen;
+ char buf[2048];
+ size_t bufpos = 0;
+ int i;
+ ssize_t count;
+ int retval = 0;
+
+ dbg("pass environment to socket '%s'", sockname);
+ sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
+ memset(&saddr, 0x00, sizeof(struct sockaddr_un));
+ saddr.sun_family = AF_LOCAL;
+ /* abstract namespace only */
+ strcpy(&saddr.sun_path[1], sockname);
+ addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
+
+ bufpos = snprintf(buf, sizeof(buf)-1, "%s@%s", action, devpath);
+ bufpos++;
+ for (i = 0; environ[i] != NULL && bufpos < sizeof(buf); i++) {
+ bufpos += strlcpy(&buf[bufpos], environ[i], sizeof(buf) - bufpos-1);
+ bufpos++;
+ }
+
+ count = sendto(sock, &buf, bufpos, 0, (struct sockaddr *)&saddr, addrlen);
+ if (count < 0)
+ retval = -1;
+ info("passed %zi bytes to socket '%s', ", count, sockname);
+
+ close(sock);
+ return retval;
+}
+
int udev_rules_run(struct udevice *udev)
{
struct name_entry *name_loop;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-28 22:49:47 +0000