forked from pool/busybox
31 lines
778 B
Diff
31 lines
778 B
Diff
---
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util-linux/dmesg.c | 10 +++++++++-
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1 file changed, 9 insertions(+), 1 deletion(-)
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--- a/util-linux/dmesg.c
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+++ b/util-linux/dmesg.c
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@@ -12,6 +12,14 @@
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#include <sys/klog.h>
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#include "libbb.h"
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+static int kernel_ringbuffer_size(void)
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+{
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+ int len = klogctl(10, NULL, 0);
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+ if (len > 0)
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+ return len;
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+ return 16384;
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+}
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+
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int dmesg_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int dmesg_main(int argc UNUSED_PARAM, char **argv)
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{
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@@ -31,7 +39,7 @@ int dmesg_main(int argc UNUSED_PARAM, ch
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return EXIT_SUCCESS;
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}
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- len = (flags & OPT_s) ? xatoul_range(size, 2, INT_MAX) : 16384;
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+ len = (flags & OPT_s) ? xatoul_range(size, 2, INT_MAX) : kernel_ringbuffer_size();
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buf = xmalloc(len);
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len = klogctl(3 + (flags & OPT_c), buf, len);
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if (len < 0)
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