diff options
| author | Dmitry Wagin <dmitry.wagin@ya.ru> | 2021-03-23 16:01:15 +0000 |
|---|---|---|
| committer | Mark Johnston <markj@FreeBSD.org> | 2021-12-31 17:57:01 +0000 |
| commit | 881059955a5d83fc173f40f266d93ddd91255291 (patch) | |
| tree | 91955874373c167258fc18c6daf883ebe48bd58c | |
| parent | 963f5dc7a30624e95d72fb7f87b8892651164e46 (diff) | |
| download | src-881059955a5d83fc173f40f266d93ddd91255291.tar.gz src-881059955a5d83fc173f40f266d93ddd91255291.zip | |
libc: Some enhancements to syslog(3)
This is a re-application of commit
2d82b47a5b4ef18550565dd55628d51f54d0af2e, which was reverted since it
broke with syslog daemons that don't adjust the /dev/log recv buffer
size. Now that the default is large enough to accomodate 8KB messages,
restore support for large messages.
PR: 260126
| -rw-r--r-- | lib/libc/gen/syslog.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/lib/libc/gen/syslog.c b/lib/libc/gen/syslog.c index 19d44db0075a..797c7389d1a2 100644 --- a/lib/libc/gen/syslog.c +++ b/lib/libc/gen/syslog.c @@ -57,6 +57,9 @@ __FBSDID("$FreeBSD$"); #include "libc_private.h" +/* Maximum number of characters of syslog message */ +#define MAXLINE 8192 + static int LogFile = -1; /* fd for log */ static int status; /* connection status */ static int opened; /* have done openlog() */ @@ -141,7 +144,7 @@ vsyslog1(int pri, const char *fmt, va_list ap) char ch, *p; long tz_offset; int cnt, fd, saved_errno; - char hostname[MAXHOSTNAMELEN], *stdp, tbuf[2048], fmt_cpy[1024], + char hostname[MAXHOSTNAMELEN], *stdp, tbuf[MAXLINE], fmt_cpy[MAXLINE], errstr[64], tz_sign; FILE *fp, *fmt_fp; struct bufcookie tbuf_cookie; @@ -396,9 +399,19 @@ connectlog(void) struct sockaddr_un SyslogAddr; /* AF_UNIX address of local logger */ if (LogFile == -1) { + socklen_t len; + if ((LogFile = _socket(AF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC, 0)) == -1) return; + if (_getsockopt(LogFile, SOL_SOCKET, SO_SNDBUF, &len, + &(socklen_t){sizeof(len)}) == 0) { + if (len < MAXLINE) { + len = MAXLINE; + (void)_setsockopt(LogFile, SOL_SOCKET, SO_SNDBUF, + &len, sizeof(len)); + } + } } if (LogFile != -1 && status == NOCONN) { SyslogAddr.sun_len = sizeof(SyslogAddr); |