utils-std

commit: b8680d26cb0c44f4bc0155563dfa99d2d663a85e
parent d176c8781a093f5e300689dbe75e7fa4172584bd
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Wed, 29 May 2024 09:31:03 +0200

cmd/head: Fix infinite loop when /dev/null is passed

Diffstat:
M
cmd/head.c
2
++
M
test-cmd/head.t
10
++++++++++

2 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/cmd/head.c b/cmd/head.c
@@ -70,6 +70,8 @@ copy_bytes(char *filename)
 			break;
 		}
 
+		if(nread == 0) break;
+
 		if(write(STDOUT_FILENO, buf, nread) < 0)
 		{
 			fprintf(
diff --git a/test-cmd/head.t b/test-cmd/head.t
@@ -51,6 +51,16 @@
   0
   [1]
 
+  $ head -c 3 </dev/null | wc -c
+  0
+  $ head -c 3 /dev/null | wc -c
+  0
+
+  $ head -n 3 </dev/null | wc -l
+  0
+  $ head -n 3 /dev/null | wc -l
+  0
+
   $ seq 1 2 | head - /dev/null
   ==> - <==
   1