tsarc and named pipe

3 files changed, 79 insertions, 0 deletions

diff --git a/src/pipe.c b/src/pipe.c
new file mode 100644
index 0000000..88006a4
--- /dev/null
+++ b/src/pipe.c
@@ -0,0 +1,61 @@
+#include "pipe.h"
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <ctype.h>
+
+FILE *named_pipe;
+
+void init_pipe() {
+  mkfifo(PIPE_PATH, 0666);
+  named_pipe = fopen(PIPE_PATH, "r");
+}
+
+void await_change() {
+  char buff[1024];
+  while (1) {
+    if (!fgets(buff, sizeof(buff), named_pipe)) {
+      fclose(named_pipe);
+      named_pipe = fopen(PIPE_PATH, "r"); // This blocks, 0% CPU, yay
+      continue;
+    }
+    break;
+  }
+  printf("Received: %s\n", buff);
+
+  int argc = 0, chr_on = 0, i = 0;
+  char argv[4][256];
+
+  while (argc < 4) {
+    char chr = buff[i];
+    if (chr == '\0') {
+      break;
+    }
+
+    if (isspace(chr)) {
+      if (chr_on == 0) {
+        i++;
+        continue;
+      }
+
+      argv[argc][chr_on] = '\0';
+      argc++;
+      chr_on = 0;
+
+    } else {
+      argv[argc][chr_on] = chr;
+      chr_on++;
+    }
+
+    i++;
+  }
+  make_change(argv, argc);
+}
+
+void make_change(char argv[MAX_ARGS][MAX_ARG_LEN], int argc) {
+  printf("Making change with:\n");
+  for (int i = 0; i < argc; i++) {
+    printf("Arg %d: %s\n", i + 1, argv[i]);
+  }
+}
diff --git a/src/pipe.h b/src/pipe.h
new file mode 100644
index 0000000..798a4a1
--- /dev/null
+++ b/src/pipe.h
@@ -0,0 +1,12 @@
+#ifndef PIPE_H
+#define PIPE_H
+#include <stdio.h>
+
+#define PIPE_PATH "/tmp/tsarc.pipe"
+#define MAX_ARG_LEN 256
+#define MAX_ARGS 4
+void init_pipe();
+void await_change();
+void make_change(char[MAX_ARGS][MAX_ARG_LEN], int);
+
+#endif
diff --git a/src/tsar.c b/src/tsar.c
index 67b9e07..b4f9fb2 100644
--- a/src/tsar.c
+++ b/src/tsar.c
@@ -5,6 +5,8 @@
 #include <stdarg.h>
 #include <string.h>
 
+#include "pipe.c"
+#include "pipe.h"
 #include <xcb/xcb.h>
 // #include <X11/Xft/Xft.h>
 
@@ -92,6 +94,10 @@ void deinit(void) {
 }
 
 int main(void) {
+  init_pipe();
+  while (1) {
+    await_change();
+  }
   init();
 
   xcb_generic_event_t* ev;