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authorJohn Crispin <blogic@openwrt.org>2013-11-14 13:41:13 +0100
committerJohn Crispin <blogic@openwrt.org>2013-11-15 17:05:20 +0100
commit916f95cb58604038695347ee41a430d8ca1f0556 (patch)
tree5dbb52a6adaf28c6c6989ea37e6975aa52075160 /utils/askfirst.c
parentf9d31edb8938341b9217ee4c14eb58111414eb97 (diff)
downloadunitd-916f95cb58604038695347ee41a430d8ca1f0556.tar
unitd-916f95cb58604038695347ee41a430d8ca1f0556.zip
debloat and reorganize code
split app into procd and init binaries remove log support, this is an external service now Signed-off-by: John Crispin <blogic@openwrt.org>
Diffstat (limited to 'utils/askfirst.c')
-rw-r--r--utils/askfirst.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/utils/askfirst.c b/utils/askfirst.c
new file mode 100644
index 0000000..6ad77aa
--- /dev/null
+++ b/utils/askfirst.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+static int redirect_output(const char *dev)
+{
+ pid_t p = setsid();
+ int fd;
+
+ chdir("/dev");
+ fd = open(dev, O_RDWR);
+ chdir("/");
+
+ if (fd < 0)
+ return -1;
+
+ dup2(fd, STDIN_FILENO);
+ dup2(fd, STDOUT_FILENO);
+ dup2(fd, STDERR_FILENO);
+ tcsetpgrp(fd, p);
+ close(fd);
+
+ return 0;
+}
+
+int main(int argc, char **argv)
+{
+ int c;
+
+ if (redirect_output(argv[1]))
+ fprintf(stderr, "%s: Failed to open %s\n", argv[0], argv[1]);
+
+ printf("Please press Enter to activate this console.\n");
+ do {
+ c = getchar();
+ if (c == EOF)
+ return -1;
+ }
+ while (c != 0xA);
+
+ execvp(argv[2], &argv[2]);
+ printf("%s: Failed to execute %s\n", argv[0], argv[2]);
+
+ return -1;
+}