Created daemonize

1 files changed, 47 insertions, 0 deletions

diff --git a/daemonize.c b/daemonize.c
new file mode 100644
index 0000000..ab231c5
--- /dev/null
+++ b/daemonize.c
@@ -0,0 +1,47 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <string.h>
+
+void q (char* m) {
+    fprintf(stderr, "%s\n", m);
+    exit(1);
+}
+
+char* lowerdup (char* a) {
+    char* b = strdup(a);
+    int i;
+    for (i = 0; b[i] != 0; i++) {
+        b[i] = tolower(b[i]);
+    }
+    return b;
+}
+
+int main (int argc, char** argv) {
+    if (argc < 2) q("[daemonize] Too few arguments.\nUsage: daemonize [--chdir] [--noclose] <command>");
+    int i, cmdlen = 0, buff_size = 256, nochdir = 1, noclose = 0;
+    char* buffer = malloc(buff_size);
+    
+    for (i = 1; i < argc; i++) {
+        char* cmp = lowerdup(argv[i]);
+        if (strcmp(cmp, "--chdir") == 0) nochdir = 0;
+        else if (strcmp(cmp, "--noclose") == 0) noclose = 1;
+        else {
+            int arglen = strlen(argv[i]);
+            if (cmdlen+arglen+1 > buff_size) {
+                buff_size *= 2;
+                buffer = realloc(buffer, buff_size);
+                if (buffer == NULL) q("[daemonize] Out of memory parsing arguments.");
+            }
+            strncpy(&buffer[cmdlen], argv[i], arglen);
+            cmdlen += arglen+1;
+            buffer[cmdlen-1] = ' ';
+        }
+        free(cmp);
+    }
+    buffer[cmdlen-1] = 0;
+
+    daemon(nochdir, noclose);
+    system(buffer);
+}