1 files changed, 32 insertions, 5 deletions

diff --git a/src/gpu.c b/src/gpu.c
index 168fe23..dbcd259 100644
--- a/src/gpu.c
+++ b/src/gpu.c
@@ -3,26 +3,53 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <unistd.h>
 
-void run_gpu_command(const char *command) {
+const char *run_gpu_command(const char *command) {
+  if (
+      access("/bin/glxinfo", F_OK) == -1 ||
+      access("/usr/bin/glxinfo", F_OK) == -1 ||
+      access("/usr/local/bin/glxinfo", F_OK) == -1 ||
+      access("/usr/X11R6/bin/glxinfo", F_OK) == -1 ||
+      access("/usr/X11R7/bin/glxinfo", F_OK) == -1 ||
+      access("/usr/pkg/bin/glxinfo", F_OK) == -1
+  ) return NULL;
   char buf[128];
+  char *out = NULL;
+  size_t outsize = 0;
 
   FILE *p = popen(command, "r");
   if (!p) {
     fprintf(stderr, "GPUコマンドを実効に失敗: %s", command);
-    return;
+    return NULL;
   }
 
   while (fgets(buf, sizeof(buf), p) != NULL) {
     buf[strcspn(buf, "\n")] = '\0';
-    printf("%s", buf);
+
+    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;
 }
 
-void display_gpu() {
-  run_gpu_command("glxinfo -B | grep -F 'OpenGL renderer string' | "
+const char *display_gpu() {
+  return run_gpu_command("glxinfo -B | grep -F 'OpenGL renderer string' | "
                   "sed 's/OpenGL renderer string: //' | sed 's/Mesa //' | "
                   "sed 's/DRI //' | sed 's/(R)//' | sed 's/(.*$//'");
 }