| @@ -0,0 +1,90 @@
+/*
+ * setctsid.c -- execute a command in a new session and with
+ * new controlling terminal
+ *
+ * derviated from: setctsid.c of Rick Sladkey <jrs@world.std.com>
+ * In the public domain.
+ *
+ * Changed by Werner Fink, <werner@suse.de>
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/syslog.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+
+#define xerror(n) do { int error = errno; \
+ if (!isatty(fileno(stderr))) \
+ syslog(LOG_ERR, n ": %s", strerror(error)); \
+ else \
+ errno = error, perror(n); \
+ } while (0)
+
+int main(int argc, char *argv[])
+{
+ int fd;
+ struct stat buf;
+ int dofork = 0;
+
+ if (argc > 1 && !strcmp(argv[1], "-f")) {
+ dofork = 1;
+ argc--;
+ argv++;
+ }
+ if (argc < 3) {
+ fprintf(stderr, "usage: setctsid [-f] tty program [arg ...]\n");
+ exit(1);
+ }
+ if (stat(argv[1], &buf) < 0) {
+ perror(argv[1]);
+ exit(1);
+ }
+ if (!(S_ISCHR(buf.st_mode))) {
+ /* why do we care? */
+ fprintf(stderr, "%s: not a character device\n", argv[1]);
+ exit(1);
+ }
+ if (dofork) {
+ switch (fork()) {
+ case -1:
+ perror("fork");
+ exit(1);
+ case 0:
+ break;
+ default:
+ exit(0);
+ }
+ }
+ if (setsid() < 0) {
+ perror("setsid");
+ exit(1);
+ }
+ if ((fd = open(argv[1], O_RDWR, 0)) < 0) {
+ xerror("open");
+ exit(1);
+ }
+ dup2(fd, fileno(stdin));
+ dup2(fd, fileno(stdout));
+ dup2(fd, fileno(stderr));
+
+ if (isatty(fd)) {
+ if (ioctl(fileno(stdin), TIOCSCTTY, argv[1]) < 0) {
+ xerror("ioctl");
+ exit(1);
+ }
+ }
+
+ if (fd > fileno(stderr))
+ close(fd);
+
+ execvp(argv[2], argv + 2);
+ xerror("execvp");
+ exit(1);
+}
|
