最初コミット

1 files changed, 52 insertions, 0 deletions

diff --git a/src/user.c b/src/user.c
new file mode 100644
index 0000000..27a6b79
--- /dev/null
+++ b/src/user.c
@@ -0,0 +1,52 @@
+#include "user.h"
+
+#include <stdio.h>
+#include <string.h>
+
+void display_user_name() {
+  char buf[128];
+  FILE *p = popen("whoami", "r");
+  if (!p) {
+    fprintf(stderr, "「whoami」コマンドを実効に失敗");
+    return;
+  }
+
+  while (fgets(buf, sizeof(buf), p) != NULL) {
+    buf[strcspn(buf, "\n")] = '\0';
+    printf("%s", buf);
+  }
+
+  pclose(p);
+}
+
+void display_user_host() {
+  char buf[64];
+  const char *filename;
+#ifdef __OpenBSD__
+  filename = "/etc/myname";
+#else
+  filename = "/etc/hostname";
+#endif
+  FILE *f = fopen(filename, "r");
+  if (!f) {
+    snprintf(buf, sizeof(buf), "「%s」を見つけられません。", filename);
+    perror(buf);
+    return;
+  }
+
+  while (fgets(buf, sizeof(buf), f) != NULL) {
+    printf("%s", buf);
+  }
+
+  /* char hostname[128]; */
+  /* int cnt = 0; */
+  /* for (int i = 0; i < 128; i++) { */
+  /*   unsigned char key; */
+  /*   fread(&key, sizeof(key), 1, f); */
+  /*   hostname[i] = key; */
+  /*   cnt += 1; */
+  /* } */
+
+  /* hostname[cnt] = '\0'; */
+  fclose(f);
+}