From 0556b433bf6f58d837dae4b74ddea25260ca64c8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=AB=8F=E8=A8=AA=E5=AD=90?= <suwako@076.moe>
Date: Fri, 21 Jun 2024 21:34:05 +0900
Subject: =?UTF-8?q?=E3=82=B7=E3=82=A7=E3=83=AB=E6=83=85=E5=A0=B1=E3=81=AE?=
 =?UTF-8?q?=E8=BF=BD=E5=8A=A0?=
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---
 main.c      | 10 +++++++++-
 src/shell.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 src/shell.h |  6 ++++++
 3 files changed, 57 insertions(+), 1 deletion(-)
 create mode 100644 src/shell.c
 create mode 100644 src/shell.h

diff --git a/main.c b/main.c
index 896ab88..25e7b0f 100644
--- a/main.c
+++ b/main.c
@@ -15,6 +15,7 @@
 #include "src/packages.h"
 #include "src/resolution.h"
 #include "src/wm.h"
+#include "src/shell.h"
 #include "src/cpu.h"
 #include "src/gpu.h"
 #include "src/memory.h"
@@ -200,6 +201,14 @@ int main(int argc, char *argv[]) {
     lc++;
   }
 
+  const char *shell = display_shell();
+  if (shell) {
+    printf("%s ", LOGO[lc]);
+    printf("%sShell%s: %s\n", color, reset, shell);
+    free((void *)shell);
+    lc++;
+  }
+
   const char *cpu = display_cpu();
   if (cpu) {
     printf("%s ", LOGO[lc]);
@@ -228,7 +237,6 @@ int main(int argc, char *argv[]) {
 
   // TODO:
   // * libc
-  // * シェル
   // * 端末
   // * ストレージ
 
diff --git a/src/shell.c b/src/shell.c
new file mode 100644
index 0000000..783ed98
--- /dev/null
+++ b/src/shell.c
@@ -0,0 +1,42 @@
+#include "shell.h"
+#include "common.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+const char *display_shell() {
+  char *shell = (char *)malloc(64 * sizeof(char));
+  if (shell == NULL) {
+    return NULL;
+  }
+
+  const char *ver;
+  const char *name = run_command_s("echo ${SHELL##*/}");
+
+  if (strncmp(name, "bash", strlen("bash")) == 0) {
+    ver = run_command_s("echo $BASH_VERSION");
+  } else if (strncmp(name, "ksh", strlen("ksh")) == 0) {
+    ver = run_command_s("echo $KSH_VERSION | sed 's/^.*v//' | sed 's/ .*$//'");
+  } else if (strncmp(name, "zsh", strlen("zsh")) == 0) {
+    ver = run_command_s("zsh --version | sed 's/ (.*$//' | sed 's/zsh //'");
+  } else if (strncmp(name, "yash", strlen("yash")) == 0) {
+    ver = run_command_s("LC_ALL=C yash --version | head -1 | "
+        "sed 's/Yet another shell, version //'");
+  } else if (strncmp(name, "tsch", strlen("tsch")) == 0) {
+    ver = run_command_s("tcsh --version | sed 's/tcsh //' | sed 's/ .*$//'");
+  } else {
+    ver = NULL;
+  }
+
+  if (ver != NULL) {
+    snprintf(shell, sizeof(shell), "%s %s", name, ver);
+  } else {
+    snprintf(shell, sizeof(shell), "%s", name);
+  }
+
+  free((void *)name);
+  if (ver != NULL) free((void *)ver);
+
+  return shell;
+}
diff --git a/src/shell.h b/src/shell.h
new file mode 100644
index 0000000..c52e9fe
--- /dev/null
+++ b/src/shell.h
@@ -0,0 +1,6 @@
+#ifndef SHELL_H
+#define SHELL_H
+
+const char *display_shell();
+
+#endif
-- 
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