allow programs in /lib/udev called without the path

[elogind.git] / udev_utils_run.c

diff --git a/udev_utils_run.c b/udev_utils_run.c
index 1315154c2678c27d9c869fe3fdc2100b0aad6764..e1e775ebe6f2a5f03964aba8d5db86375a24d4bd 100644 (file)
--- a/udev_utils_run.c
+++ b/udev_utils_run.c
@@ -82,6 +82,7 @@ int run_program(const char *command, const char *subsystem,
        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;
@@ -115,17 +116,24 @@ int run_program(const char *command, const char *subsystem,
        /* prepare pipes from child to parent */
        if (result || log) {
                if (pipe(outpipe) != 0) {
-                       err("pipe failed");
+                       err("pipe failed: %s", strerror(errno));
                        return -1;
                }
        }
        if (log) {
                if (pipe(errpipe) != 0) {
-                       err("pipe failed");
+                       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:
@@ -145,7 +153,7 @@ int run_program(const char *command, const char *subsystem,
                                dup2(devnull, STDERR_FILENO);
                        close(devnull);
                } else
-                       err("open /dev/null failed");
+                       err("open /dev/null failed: %s", strerror(errno));
                if (outpipe[WRITE_END] > 0)
                        dup2(outpipe[WRITE_END], STDOUT_FILENO);
                if (errpipe[WRITE_END] > 0)
@@ -156,7 +164,7 @@ int run_program(const char *command, const char *subsystem,
                err("exec of program '%s' failed", argv[0]);
                _exit(1);
        case -1:
-               err("fork of '%s' failed", argv[0]);
+               err("fork of '%s' failed: %s", argv[0], strerror(errno));
                return -1;
        default:
                /* read from child if requested */
@@ -199,7 +207,7 @@ int run_program(const char *command, const char *subsystem,
                                                close(outpipe[READ_END]);
                                                outpipe[READ_END] = -1;
                                                if (count < 0) {
-                                                       err("stdin read failed with '%s'", strerror(errno));
+                                                       err("stdin read failed: %s", strerror(errno));
                                                        retval = -1;
                                                }
                                                continue;
@@ -233,7 +241,7 @@ int run_program(const char *command, const char *subsystem,
                                                close(errpipe[READ_END]);
                                                errpipe[READ_END] = -1;
                                                if (count < 0)
-                                                       err("stderr read failed with '%s'", strerror(errno));
+                                                       err("stderr read failed: %s", strerror(errno));
                                                continue;
                                        }
                                        errbuf[count] = '\0';