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-rwxr-xr-xt/check-non-portable-shell.pl1
1 files changed, 1 insertions, 0 deletions
diff --git a/t/check-non-portable-shell.pl b/t/check-non-portable-shell.pl
index d5823f71d8..c8f10d40a1 100755
--- a/t/check-non-portable-shell.pl
+++ b/t/check-non-portable-shell.pl
@@ -41,6 +41,7 @@ while (<>) {
/^\s*[^#]\s*which\s/ and err 'which is not portable (use type)';
/\btest\s+[^=]*==/ and err '"test a == b" is not portable (use =)';
/\bwc -l.*"\s*=/ and err '`"$(wc -l)"` is not portable (use test_line_count)';
+ /\bhead\s+-c\b/ and err 'head -c is not portable (use test_copy_bytes BYTES <file >out)';
/\bexport\s+[A-Za-z0-9_]*=/ and err '"export FOO=bar" is not portable (use FOO=bar && export FOO)';
/^\s*([A-Z0-9_]+=(\w+|(["']).*?\3)\s+)+(\w+)/ and exists($func{$4}) and
err '"FOO=bar shell_func" assignment extends beyond "shell_func"';