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authorDenis Vlasenko2006-11-26 20:13:39 +0000
committerDenis Vlasenko2006-11-26 20:13:39 +0000
commite5667c1cfe339b2f84abaabb90259ec29b91cf89 (patch)
tree385d96cede38de88bcc55cf2e02c36deb86f25a5 /debianutils/run_parts.c
parentec0c920a78813d1c047924e024017189dedeec93 (diff)
downloadbusybox-e5667c1cfe339b2f84abaabb90259ec29b91cf89.zip
busybox-e5667c1cfe339b2f84abaabb90259ec29b91cf89.tar.gz
Closing bug 730. libbb run_parts is using scandir (a GNUism),
and it is used only by run_parts applet, so move it there. Also saved ~30 bytes (prolly gcc autoinlining...).
Diffstat (limited to 'debianutils/run_parts.c')
-rw-r--r--debianutils/run_parts.c107
1 files changed, 99 insertions, 8 deletions
diff --git a/debianutils/run_parts.c b/debianutils/run_parts.c
index f2d90b6..448fe80 100644
--- a/debianutils/run_parts.c
+++ b/debianutils/run_parts.c
@@ -37,17 +37,108 @@
#include "busybox.h"
#include <getopt.h>
-#include <stdlib.h>
-
static const struct option runparts_long_options[] = {
- { "test", 0, NULL, 't' },
- { "umask", 1, NULL, 'u' },
- { "arg", 1, NULL, 'a' },
- { 0, 0, 0, 0 }
+ { "test", 0, NULL, 't' },
+ { "umask", 1, NULL, 'u' },
+ { "arg", 1, NULL, 'a' },
+ { 0, 0, 0, 0 }
};
-extern char **environ;
+/* 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)
+{
+ const 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
+ */
+static int run_parts(char **args, const unsigned char test_mode)
+{
+ 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("cannot open '%s'", arg0);
+ }
+
+ for (i = 0; i < entries; i++) {
+ filename = concat_path_file(arg0, namelist[i]->d_name);
+
+ xstat(filename, &st);
+ 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, environ);
+ 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;
+}
+
/* run_parts_main */
/* Process options */
@@ -96,5 +187,5 @@ int run_parts_main(int argc, char **argv)
args[0] = argv[optind];
args[argcount] = 0;
- return(run_parts(args, test_mode, environ));
+ return run_parts(args, test_mode);
}