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Fix logging long named command lines

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The saved_command_line buffer in bin/named/main.c is 8192 bytes long.
The size of libisc's internal logging buffer (defined by the value of
the LOG_BUFFER_SIZE constant in lib/isc/log.c) is also 8192 bytes.
Since the buffer containing the ellipsis is passed as the last argument
to isc_log_write() and the buffer containing the potentially trimmed
named command line (saved_command_line) is passed as the second argument
in the same isc_log_write() call, it may happen that saved_command_line
will exhaust all available space in libisc's internal logging buffer, in
which case the ellipsis will be elided from the output.

Make saved_command_line 4096 bytes long as that value is arguably also
large enough for any reasonable use case and at the same time it ensures
ellipsis will always be printed for excessively long named command
lines.
This commit is contained in:
Michał Kępień
2019-11-29 09:06:41 +01:00
parent c6811ed052
commit 009df30f3a
2 changed files with 2 additions and 3 deletions
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bin/named/main.c
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@@ -116,7 +116,7 @@ LIBDNS_EXTERNAL_DATA extern unsigned int dns_zone_mkey_month;
static bool want_stats = false;
static char program_name[NAME_MAX] = "named";
static char absolute_conffile[PATH_MAX];
static char saved_command_line[8192] = { 0 };
static char saved_command_line[4096] = { 0 };
static char ellipsis[5] = { 0 };
static char version[512];
static unsigned int maxsocks = 0;