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-rw-r--r--doc/examples/daemon-depedencies/require.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/doc/examples/daemon-depedencies/require.c b/doc/examples/daemon-depedencies/require.c
new file mode 100644
index 0000000..b6f7945
--- /dev/null
+++ b/doc/examples/daemon-depedencies/require.c
@@ -0,0 +1,37 @@
+#include <bus.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+
+#define t(stmt) if (stmt) goto fail
+
+
+static char arg[4098];
+
+
+int main(int argc, char *argv[])
+{
+ bus_t bus;
+ int i;
+ if (argc < 2)
+ return fprintf(stderr, "USAGE: %s daemon...", *argv), 2;
+ t(bus_open(&bus, getenv("BUS_INIT"), BUS_WRONLY));
+
+ for (i = 1; i < argc; i++) {
+ sprintf(arg, "grep '^%s$' < \"${XDG_RUNTIME_DIR}/started-daemons\" >/dev/null", argv[i]);
+ if (WEXITSTATUS(system(arg))) {
+ sprintf(arg, "%ji require %s", (intmax_t)getppid(), argv[i]);
+ t(bus_write(&bus, arg));
+ }
+ }
+
+ bus_close(&bus);
+ return 0;
+
+fail:
+ perror("require");
+ bus_close(&bus);
+ return 1;
+}
+