bore

commit 86b483dfb27ad3bb5e32a55e79e92424d2e9e57b
parent bed1b1e4ce924930965f5369a5b45d1c93a44a3d
Author: phoebos <ben@bvnf.space>
Date:   Thu, 10 Mar 2022 03:25:27 +0000

uname: add

Diffstat:
M
Makefile
 | 
1
+
M
PROGRESS
 | 
2
+-
M
TODO.posix
 | 
2
+-
A
uname.c
 | 
55
+++++++++++++++++++++++++++++++++++++++++++++++++++++++

4 files changed, 58 insertions(+), 2 deletions(-)
diff --git a/Makefile b/Makefile
@@ -15,6 +15,7 @@ BINS = \
 	tee \
 	true \
 	tty \
+	uname \
 	wc \
 
 CC = cc
diff --git a/PROGRESS b/PROGRESS
@@ -44,7 +44,7 @@
 [ ] tr
 [x] true
 [x] tty
-[ ] uname
+[x] uname [-amnrsv]
 [ ] uudecode
 [ ] uuencode
 [ ] wc [-lwc]
diff --git a/TODO.posix b/TODO.posix
@@ -110,7 +110,7 @@
 [x] tty
 [ ] ulimit
 [ ] umask
-[ ] uname
+[x] uname
 [ ] uncompress
 [ ] unexpand
 [ ] uniq
diff --git a/uname.c b/uname.c
@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <sys/utsname.h>
+#include <unistd.h>
+
+int
+main(int argc, char **argv) {
+    int c;
+    int OPT_m, OPT_n, OPT_r, OPT_s, OPT_v;
+    OPT_m = OPT_n = OPT_r = OPT_s = OPT_v = 0;
+
+    if (argc == 1)
+        OPT_s = 1;
+
+    while ((c = getopt(argc, argv, ":amnrsv")) != -1) {
+        switch (c) {
+            case 'a':
+                OPT_m = OPT_n = OPT_r = OPT_s = OPT_v = 1;
+                break;
+            case 'm':
+                OPT_m = 1;
+                break;
+            case 'n':
+                OPT_n = 1;
+                break;
+            case 'r':
+                OPT_r = 1;
+                break;
+            case 's':
+                OPT_s = 1;
+                break;
+            case 'v':
+                OPT_v = 1;
+                break;
+            case '?':
+                fprintf(stderr, "usage: %s [-amnrsv]\n", *argv);
+                return 1;
+        }
+    }
+
+    struct utsname ut;
+    if (uname(&ut) == -1) {
+        perror("uname");
+        return 1;
+    }
+
+    /* TODO: don't print unnecessary trailing spaces */
+    if (OPT_s) printf("%s ", ut.sysname);
+    if (OPT_n) printf("%s ", ut.nodename);
+    if (OPT_r) printf("%s ", ut.release);
+    if (OPT_v) printf("%s ", ut.version);
+    if (OPT_m) printf("%s ", ut.machine);
+    printf("\n");
+    
+    return 0;
+}