bore

commit 954790d3acb7cd91aa1fe22ec19eb1c45caa3037
parent 573165850a9a9cd479bc6af922b3b73a7717a459
Author: phoebos <ben@bvnf.space>
Date:   Sat,  1 Oct 2022 22:18:31 +0100

sleep: add

Diffstat:
M
.gitignore
 | 
1
+
M
Makefile
 | 
1
+
M
PROGRESS
 | 
2
+-
M
TODO.posix
 | 
2
+-
A
sleep.c
 | 
20
++++++++++++++++++++

5 files changed, 24 insertions(+), 2 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -10,6 +10,7 @@ nice
 pwd
 rm
 rmdir
+sleep
 sort
 tee
 true
diff --git a/Makefile b/Makefile
@@ -13,6 +13,7 @@ BINS = \
 	pwd \
 	rm \
 	rmdir \
+	sleep \
 	sort \
 	tee \
 	true \
diff --git a/PROGRESS b/PROGRESS
@@ -33,7 +33,7 @@
 [x] pwd [-LP]
 [ ] rm
 [ ] rmdir
-[ ] sleep
+[x] sleep
 [ ] sort [-r]
 [ ] split
 [ ] strings
diff --git a/TODO.posix b/TODO.posix
@@ -89,7 +89,7 @@
 [.] rmdir
 [ ] sed
 [ ] sh
-[ ] sleep
+[x] sleep
 [.] sort
 [ ] split
 [ ] strings
diff --git a/sleep.c b/sleep.c
@@ -0,0 +1,20 @@
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int
+main(int argc, char **argv) {
+    if (argc != 2) {
+        fprintf(stderr, "usage: %s time\n", *argv);
+        return 1;
+    }
+
+    errno = 0;
+    unsigned long t = strtoul(argv[1], NULL, 10);
+    if (errno || (signed long)t < 0)
+        return 1;
+    while (t > 0)
+        t = sleep(t);
+    return 0;
+}