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Fix pg_current_logfile() to not emit a carriage return on Windows.
Due to not having our signals straight about CRLF vs. LF line
termination, the output of pg_current_logfile() included a trailing
\r on Windows. To fix, force the file descriptor it uses into text
mode.
While here, move a couple of local variable declarations to make
the function's logic clearer.
In v12 and v13, also back-patch the test added by 1c4e88e2f
so that
this function has some test coverage. However, the 004_logrotate.pl
test script doesn't exist before v12, and it didn't seem worth adding
to older branches just for this.
Per report from Thomas Kellerer. Back-patch to v10 where this
function was added.
Discussion: https://postgr.es/m/412ae8da-76bb-640f-039a-f3513499e53d@gmx.net
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@ -16,6 +16,7 @@
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#include <sys/file.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <math.h>
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#include <unistd.h>
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@ -738,9 +739,6 @@ pg_current_logfile(PG_FUNCTION_ARGS)
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FILE *fd;
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char lbuffer[MAXPGPATH];
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char *logfmt;
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char *log_filepath;
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char *log_format = lbuffer;
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char *nlpos;
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/* The log format parameter is optional */
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if (PG_NARGS() == 0 || PG_ARGISNULL(0))
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@ -767,16 +765,23 @@ pg_current_logfile(PG_FUNCTION_ARGS)
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PG_RETURN_NULL();
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}
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#ifdef WIN32
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/* syslogger.c writes CRLF line endings on Windows */
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_setmode(_fileno(fd), _O_TEXT);
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#endif
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/*
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* Read the file to gather current log filename(s) registered by the
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* syslogger.
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*/
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while (fgets(lbuffer, sizeof(lbuffer), fd) != NULL)
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{
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/*
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* Extract log format and log file path from the line; lbuffer ==
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* log_format, they share storage.
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*/
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char *log_format;
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char *log_filepath;
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char *nlpos;
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/* Extract log format and log file path from the line. */
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log_format = lbuffer;
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log_filepath = strchr(lbuffer, ' ');
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if (log_filepath == NULL)
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{
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@ -3,7 +3,7 @@ use warnings;
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use PostgresNode;
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use TestLib;
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use Test::More tests => 4;
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use Test::More tests => 5;
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use Time::HiRes qw(usleep);
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# Set up node with logging collector
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@ -47,6 +47,10 @@ for (my $attempts = 0; $attempts < $max_attempts; $attempts++)
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like($first_logfile, qr/division by zero/, 'found expected log file content');
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# While we're at it, test pg_current_logfile() function
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is($node->safe_psql('postgres', "SELECT pg_current_logfile('stderr')"),
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$lfname, 'pg_current_logfile() gives correct answer');
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# Sleep 2 seconds and ask for log rotation; this should result in
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# output into a different log file name.
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sleep(2);
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