1 files changed, 126 insertions, 0 deletions

diff --git a/busybox/libbb/run_parts.c b/busybox/libbb/run_parts.c
new file mode 100644
index 000000000..4c8841fe5
--- /dev/null
+++ b/busybox/libbb/run_parts.c
@@ -0,0 +1,126 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * run command from specified directory
+ *
+ *
+ * Copyright (C) 2001 by Emanuele Aina <emanuele.aina@tiscali.it>
+ * rewrite to vfork usage by
+ * Copyright (C) 2002 by Vladimir Oleynik <dzo@simtreas.ru>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ *
+ */
+
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <stdlib.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <errno.h>
+
+#include "libbb.h"
+
+/* valid_name */
+/* True or false? Is this a valid filename (upper/lower alpha, digits,
+ * underscores, and hyphens only?)
+ */
+static int valid_name(const struct dirent *d)
+{
+        char *c = d->d_name;
+
+        while (*c) {
+                if (!isalnum(*c) && (*c != '_') && (*c != '-')) {
+                        return 0;
+                }
+                ++c;
+        }
+        return 1;
+}
+
+/* test mode = 1 is the same as official run_parts
+ * test_mode = 2 means to fail silently on missing directories
+ */
+
+extern int run_parts(char **args, const unsigned char test_mode, char **env)
+{
+        struct dirent **namelist = 0;
+        struct stat st;
+        char *filename;
+        char *arg0 = args[0];
+        int entries;
+        int i;
+        int exitstatus = 0;
+
+#if __GNUC__
+        /* Avoid longjmp clobbering */
+        (void) &i;
+        (void) &exitstatus;
+#endif
+        /* scandir() isn't POSIX, but it makes things easy. */
+        entries = scandir(arg0, &namelist, valid_name, alphasort);
+
+        if (entries == -1) {
+                if (test_mode & 2) {
+                        return(2);
+                }
+                bb_perror_msg_and_die("failed to open directory %s", arg0);
+        }
+
+        for (i = 0; i < entries; i++) {
+
+                filename = concat_path_file(arg0, namelist[i]->d_name);
+
+                if (stat(filename, &st) < 0) {
+                        bb_perror_msg_and_die("failed to stat component %s", filename);
+                }
+                if (S_ISREG(st.st_mode) && !access(filename, X_OK)) {
+                        if (test_mode) {
+                                puts(filename);
+                        } else {
+                                /* exec_errno is common vfork variable */
+                                volatile int exec_errno = 0;
+                                int result;
+                                int pid;
+
+                                if ((pid = vfork()) < 0) {
+                                        bb_perror_msg_and_die("failed to fork");
+                                } else if (!pid) {
+                                        args[0] = filename;
+                                        execve(filename, args, env);
+                                        exec_errno = errno;
+                                        _exit(1);
+                                }
+
+                                waitpid(pid, &result, 0);
+                                if(exec_errno) {
+                                        errno = exec_errno;
+                                        bb_perror_msg("failed to exec %s", filename);
+                                        exitstatus = 1;
+                                }
+                                if (WIFEXITED(result) && WEXITSTATUS(result)) {
+                                        bb_perror_msg("%s exited with return code %d", filename, WEXITSTATUS(result));
+                                        exitstatus = 1;
+                                } else if (WIFSIGNALED(result)) {
+                                        bb_perror_msg("%s exited because of uncaught signal %d", filename, WTERMSIG(result));
+                                        exitstatus = 1;
+                                }
+                        }
+                }
+                else if (!S_ISDIR(st.st_mode)) {
+                        bb_error_msg("component %s is not an executable plain file", filename);
+                        exitstatus = 1;
+                }
+
+                free(namelist[i]);
+                free(filename);
+        }
+        free(namelist);
+
+        return(exitstatus);
+}