+ status = spawn_and_wait(args);
+ if (status < 0) {
+ bb_simple_perror_msg(args[0]);
+ return errno == ENOENT ? 127 : 126;
+ }
+ if (status == 255) {
+ bb_error_msg("%s: exited with status 255; aborting", args[0]);
+ return 124;
+ }
+/* Huh? I think we won't see this, ever. We don't wait with WUNTRACED!
+ if (WIFSTOPPED(status)) {
+ bb_error_msg("%s: stopped by signal %d",
+ args[0], WSTOPSIG(status));
+ return 125;
+ }
+*/
+ if (status >= 1000) {
+ bb_error_msg("%s: terminated by signal %d",
+ args[0], status - 1000);
+ return 125;
+ }
+ if (status)
+ return 123;
+ return 0;
+}
+
+
+typedef struct xlist_t {
+ struct xlist_t *link;
+ size_t length;
+ char xstr[1];
+} xlist_t;
+
+static smallint eof_stdin_detected;
+
+#define ISBLANK(c) ((c) == ' ' || (c) == '\t')
+#define ISSPACE(c) (ISBLANK(c) || (c) == '\n' || (c) == '\r' \
+ || (c) == '\f' || (c) == '\v')
+
+#if ENABLE_FEATURE_XARGS_SUPPORT_QUOTES
+static xlist_t *process_stdin(xlist_t *list_arg,
+ const char *eof_str, size_t mc, char *buf)
+{
+#define NORM 0
+#define QUOTE 1
+#define BACKSLASH 2
+#define SPACE 4
+
+ char *s = NULL; /* start word */
+ char *p = NULL; /* pointer to end word */
+ char q = '\0'; /* quote char */
+ char state = NORM;
+ char eof_str_detected = 0;
+ size_t line_l = 0; /* size loaded args line */
+ int c; /* current char */
+ xlist_t *cur;
+ xlist_t *prev;
+
+ prev = cur = list_arg;
+ while (1) {
+ if (!cur) break;
+ prev = cur;
+ line_l += cur->length;
+ cur = cur->link;
+ }
+
+ while (!eof_stdin_detected) {
+ c = getchar();
+ if (c == EOF) {
+ eof_stdin_detected = 1;
+ if (s)
+ goto unexpected_eof;
+ break;
+ }
+ if (eof_str_detected)
+ continue;
+ if (state == BACKSLASH) {
+ state = NORM;
+ goto set;
+ } else if (state == QUOTE) {
+ if (c != q)
+ goto set;
+ q = '\0';
+ state = NORM;
+ } else { /* if (state == NORM) */
+ if (ISSPACE(c)) {
+ if (s) {
+ unexpected_eof:
+ state = SPACE;
+ c = '\0';
+ goto set;
+ }
+ } else {
+ if (s == NULL)
+ s = p = buf;
+ if (c == '\\') {
+ state = BACKSLASH;
+ } else if (c == '\'' || c == '"') {
+ q = c;
+ state = QUOTE;
+ } else {
+ set:
+ if ((size_t)(p - buf) >= mc)
+ bb_error_msg_and_die("argument line too long");
+ *p++ = c;
+ }
+ }
+ }
+ if (state == SPACE) { /* word's delimiter or EOF detected */
+ if (q) {
+ bb_error_msg_and_die("unmatched %s quote",
+ q == '\'' ? "single" : "double");
+ }
+ /* word loaded */
+ if (eof_str) {
+ eof_str_detected = (strcmp(s, eof_str) == 0);
+ }
+ if (!eof_str_detected) {
+ size_t length = (p - buf);
+ /* Dont xzalloc - it can be quite big */
+ cur = xmalloc(offsetof(xlist_t, xstr) + length);
+ cur->link = NULL;
+ cur->length = length;
+ memcpy(cur->xstr, s, length);
+ if (prev == NULL) {
+ list_arg = cur;
+ } else {
+ prev->link = cur;
+ }
+ prev = cur;
+ line_l += length;
+ if (line_l > mc) {
+ /* stop memory usage :-) */
+ break;
+ }