解像度の追加

1 files changed, 48 insertions, 0 deletions

diff --git a/src/resolution.c b/src/resolution.c
new file mode 100644
index 0000000..17a6ac3
--- /dev/null
+++ b/src/resolution.c
@@ -0,0 +1,48 @@
+#include "gpu.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+const char *run_res_command(const char *command) {
+  char buf[128];
+  char *out = NULL;
+  size_t outsize = 0;
+
+  FILE *p = popen(command, "r");
+  if (!p) {
+    fprintf(stderr, "解像度コマンドを実効に失敗: %s", command);
+    return NULL;
+  }
+
+  while (fgets(buf, sizeof(buf), p) != NULL) {
+    buf[strcspn(buf, "\n")] = '\0';
+
+    size_t len = strlen(buf);
+    char *nout = realloc(out, outsize + len + 1);
+    if (nout == NULL) {
+      perror("メモリの役割に失敗");
+      free(out);
+      pclose(p);
+      return NULL;
+    }
+
+    out = nout;
+
+    memccpy(out + outsize, buf, sizeof(buf), len);
+    outsize += len;
+    out[outsize] = '\0';
+  }
+
+  pclose(p);
+
+  return out;
+}
+
+const char *display_resolution() {
+  return run_res_command("xrandr --nograb --current | "
+                         "awk -F 'connected |\\\\+|\\\\(' '/ "
+                         "connected.*[0-9]+x[0-9]+\\+/ && $2 {printf $2 "
+                         "\", \"}' | sed 's/primary //' | sed 's/,//'");
+}