+static void
+fs_sanitize_cmdline(char *args)
+{
+ size_t len;
+
+ len = strnlen(args, DEVARGS_MAXLEN);
+ args[len - 1] = '\0';
+}
+
+static int
+fs_execute_cmd(struct sub_device *sdev, char *cmdline)
+{
+ FILE *fp;
+ /* store possible newline as well */
+ char output[DEVARGS_MAXLEN + 1];
+ size_t len;
+ int old_err;
+ int ret;
+
+ RTE_ASSERT(cmdline != NULL || sdev->cmdline != NULL);
+ if (sdev->cmdline == NULL) {
+ size_t i;
+
+ len = strlen(cmdline) + 1;
+ sdev->cmdline = calloc(1, len);
+ if (sdev->cmdline == NULL) {
+ ERROR("Command line allocation failed");
+ return -ENOMEM;
+ }
+ snprintf(sdev->cmdline, len, "%s", cmdline);
+ /* Replace all commas in the command line by spaces */
+ for (i = 0; i < len; i++)
+ if (sdev->cmdline[i] == ',')
+ sdev->cmdline[i] = ' ';
+ }
+ DEBUG("'%s'", sdev->cmdline);
+ old_err = errno;
+ fp = popen(sdev->cmdline, "r");
+ if (fp == NULL) {
+ ret = errno;
+ ERROR("popen: %s", strerror(errno));
+ errno = old_err;
+ return ret;
+ }
+ /* We only read one line */
+ if (fgets(output, sizeof(output) - 1, fp) == NULL) {
+ DEBUG("Could not read command output");
+ return -ENODEV;
+ }
+ fs_sanitize_cmdline(output);
+ ret = fs_parse_device(sdev, output);
+ if (ret) {
+ ERROR("Parsing device '%s' failed", output);
+ goto ret_pclose;
+ }
+ret_pclose:
+ ret = pclose(fp);
+ if (ret) {
+ ret = errno;
+ ERROR("pclose: %s", strerror(errno));
+ errno = old_err;
+ return ret;
+ }
+ return ret;
+}
+