From 48809202858c5b24383b3d8622f0130679971fa4 Mon Sep 17 00:00:00 2001
From: Kiyoshi Aman <kiyoshi.aman+adelie@gmail.com>
Date: Sat, 20 Jul 2019 15:57:24 -0500
Subject: bin/uname: add POSIX-compliant uname(1)

---
 bin/uname/uname.c | 112 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 bin/uname/uname.c

(limited to 'bin/uname/uname.c')

diff --git a/bin/uname/uname.c b/bin/uname/uname.c
new file mode 100644
index 0000000..f648f92
--- /dev/null
+++ b/bin/uname/uname.c
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2019 The Adélie Userland Team. All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/utsname.h>
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+void usage(void) __attribute__((noreturn));
+
+int main(int argc, char **argv) {
+    struct utsname sysinfo;
+    bool mflag, nflag, oflag, rflag, sflag, vflag;
+    mflag = nflag = oflag = rflag = sflag = vflag = false;
+    char ch;
+
+    while ((ch = getopt(argc, argv, "amnorsv")) != -1) {
+        switch (ch) {
+            case 'a':
+                mflag = nflag = oflag = rflag = sflag = vflag = true;
+                break;
+            case 'm':
+                mflag = true;
+                break;
+            case 'n':
+                nflag = true;
+                break;
+            case 'o':
+                oflag = true;
+                break;
+            case 'r':
+                rflag = true;
+                break;
+            case 's':
+                sflag = true;
+                break;
+            case 'v':
+                vflag = true;
+                break;
+            default:
+                usage();
+                /*UNREACHABLE*/
+        }
+    }
+    if (!(mflag || nflag || rflag || vflag)) {
+        sflag = true;
+    }
+
+    if (uname(&sysinfo) != 0) {
+        fprintf(stderr, "uname failed: %s\n", strerror(errno));
+        exit(errno);
+    }
+
+    if (sflag) {
+        printf("%s ", sysinfo.sysname);
+    }
+    if (nflag) {
+        printf("%s ", sysinfo.nodename);
+    }
+    if (rflag) {
+        printf("%s ", sysinfo.release);
+    }
+    if (vflag) {
+        printf("%s ", sysinfo.version);
+    }
+    if (mflag) {
+        printf("%s ", sysinfo.machine);
+    }
+    if (oflag) {
+        printf("%s ", sysinfo.sysname);
+    }
+    printf("\n");
+
+    return EXIT_SUCCESS;
+}
+
+void usage(void) {
+    fprintf(stderr, "usage: uname [-amnorsv]\n");
+    exit(1);
+}
-- 
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