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Diffstat (limited to 'initd/runlst.c')
-rw-r--r--initd/runlst.c128
1 files changed, 128 insertions, 0 deletions
diff --git a/initd/runlst.c b/initd/runlst.c
new file mode 100644
index 0000000..cf75126
--- /dev/null
+++ b/initd/runlst.c
@@ -0,0 +1,128 @@
+#include <sys/wait.h>
+#include <signal.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <ctype.h>
+#include <fcntl.h>
+
+#include "init.h"
+
+extern char **environ;
+
+static NORETURN void split_and_exec(char *cmd)
+{
+ char *argv[128];
+ size_t i = 0;
+
+ while (*cmd != '\0') {
+ argv[i++] = cmd; /* FIXME: buffer overflow!! */
+
+ while (*cmd != '\0' && !isspace(*cmd))
+ ++cmd;
+
+ if (isspace(*cmd)) {
+ *(cmd++) = '\0';
+
+ while (isspace(*cmd))
+ ++cmd;
+ }
+ }
+
+ argv[i] = NULL;
+
+ execve(argv[0], argv, environ);
+ perror(argv[0]);
+ exit(EXIT_FAILURE);
+}
+
+static int child_setup(const char *ctty)
+{
+ sigset_t mask;
+ int fd;
+
+ sigemptyset(&mask);
+ sigprocmask(SIG_SETMASK, &mask, NULL);
+
+ if (ctty != NULL) {
+ fd = open(ctty, O_RDWR);
+ if (fd < 0) {
+ perror(ctty);
+ return -1;
+ }
+
+ close(STDIN_FILENO);
+ close(STDOUT_FILENO);
+ close(STDERR_FILENO);
+
+ setsid();
+
+ dup2(fd, STDIN_FILENO);
+ dup2(fd, STDOUT_FILENO);
+ dup2(fd, STDERR_FILENO);
+ close(fd);
+ }
+
+ return 0;
+}
+
+int runlst_wait(char **exec, size_t num, const char *ctty)
+{
+ pid_t ret, pid;
+ int status;
+ size_t i;
+
+ for (i = 0; i < num; ++i) {
+ pid = fork();
+
+ if (pid == 0) {
+ if (child_setup(ctty))
+ exit(EXIT_FAILURE);
+ split_and_exec(exec[i]);
+ }
+
+ if (pid == -1) {
+ perror("fork");
+ return EXIT_FAILURE;
+ }
+
+ do {
+ ret = waitpid(pid, &status, 0);
+ } while (ret != pid);
+
+ if (!WIFEXITED(status))
+ return EXIT_FAILURE;
+
+ if (WEXITSTATUS(status) != EXIT_SUCCESS)
+ return WEXITSTATUS(status);
+ }
+
+ return EXIT_SUCCESS;
+}
+
+pid_t runlst(char **exec, size_t num, const char *ctty)
+{
+ int status;
+ pid_t pid;
+
+ pid = fork();
+
+ if (pid == 0) {
+ if (child_setup(ctty))
+ exit(EXIT_FAILURE);
+
+ if (num > 1) {
+ status = runlst_wait(exec, num, NULL);
+ exit(status);
+ } else {
+ split_and_exec(exec[0]);
+ }
+ }
+
+ if (pid == -1)
+ perror("fork");
+
+ return pid;
+}