mirror of
https://github.com/immortalwrt/immortalwrt.git
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45 lines
1.0 KiB
Diff
45 lines
1.0 KiB
Diff
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From 60cd34886c2c9f509974239fcf64a61f9a507d14 Mon Sep 17 00:00:00 2001
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From: Bruno Haible <bruno@clisp.org>
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Date: Tue, 25 Feb 2025 09:04:28 +0100
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Subject: [PATCH] vc-mtime: Reduce number of read() system calls.
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* lib/vc-mtime.c: Include <stddef.h>.
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(git_vc_controlled): Read bytes into a buffer, not one-by-one.
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---
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ChangeLog | 6 ++++++
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lib/vc-mtime.c | 15 +++++++++++----
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2 files changed, 17 insertions(+), 4 deletions(-)
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--- a/lib/vc-mtime.c
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+++ b/lib/vc-mtime.c
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@@ -21,6 +21,7 @@
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/* Specification. */
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#include "vc-mtime.h"
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+#include <stddef.h>
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#include <stdlib.h>
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#include <unistd.h>
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@@ -56,11 +57,17 @@ git_vc_controlled (const char *filename)
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return false;
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/* Read the subprocess output, and test whether it is non-empty. */
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- size_t count = 0;
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- char c;
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+ ptrdiff_t count = 0;
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- while (safe_read (fd[0], &c, 1) > 0)
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- count++;
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+ for (;;)
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+ {
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+ char buf[1024];
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+ ptrdiff_t n = safe_read (fd[0], buf, sizeof (buf));
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+ if (n > 0)
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+ count += n;
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+ else
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+ break;
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+ }
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close (fd[0]);
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