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cc57b56ec6
http://www.lavrsen.dk/twiki/bin/view/Motion/FeatureRequest2008x10x15x130110 Increased buffer in ffmpeg to allow encoding at 1600x1200 * Avoid possible stack smashing in v4l_open_vidpipe().
95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
/*
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* logger.c
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*
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* Logger for motion
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*
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* Copyright 2005, William M. Brack
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* Copyright 2008 by Angel Carpintero (ack@telefonica.net)
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* This software is distributed under the GNU Public License Version 2
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* See also the file 'COPYING'.
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*
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*/
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#include "logger.h" /* already includes motion.h */
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#include <stdarg.h>
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/**
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* motion_log
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*
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* This routine is used for printing all informational, debug or error
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* messages produced by any of the other motion functions. It always
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* produces a message of the form "[n] {message}", and (if the param
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* 'errno_flag' is set) follows the message with the associated error
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* message from the library.
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*
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* Parameters:
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*
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* level logging level for the 'syslog' function
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* (-1 implies no syslog message should be produced)
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* errno_flag if set, the log message should be followed by the
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* error message.
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* fmt the format string for producing the message
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* ap variable-length argument list
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*
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* Returns:
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* Nothing
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*/
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void motion_log(int level, int errno_flag, const char *fmt, ...)
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{
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int errno_save, n;
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char buf[1024];
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#if (!defined(BSD))
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char msg_buf[100];
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#endif
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va_list ap;
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int threadnr;
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/* If pthread_getspecific fails (e.g., because the thread's TLS doesn't
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* contain anything for thread number, it returns NULL which casts to zero,
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* which is nice because that's what we want in that case.
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*/
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threadnr = (unsigned long)pthread_getspecific(tls_key_threadnr);
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/*
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* First we save the current 'error' value. This is required because
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* the subsequent calls to vsnprintf could conceivably change it!
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*/
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errno_save = errno;
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/* Prefix the message with the thread number */
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n = snprintf(buf, sizeof(buf), "[%d] ", threadnr);
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/* Next add the user's message */
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va_start(ap, fmt);
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n += vsnprintf(buf + n, sizeof(buf) - n, fmt, ap);
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/* If errno_flag is set, add on the library error message */
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if (errno_flag) {
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strncat(buf, ": ", 1024 - strlen(buf));
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n += 2;
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/*
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* this is bad - apparently gcc/libc wants to use the non-standard GNU
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* version of strerror_r, which doesn't actually put the message into
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* my buffer :-(. I have put in a 'hack' to get around this.
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*/
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#if (defined(BSD))
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strerror_r(errno_save, buf + n, sizeof(buf) - n); /* 2 for the ': ' */
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#else
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strncat(buf, strerror_r(errno_save, msg_buf, sizeof(msg_buf)), 1024 - strlen(buf));
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#endif
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}
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/* If 'level' is not negative, send the message to the syslog */
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if (level >= 0)
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syslog(level, "%s", buf);
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/* For printing to stderr we need to add a newline */
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strncat(buf, "\n", 1024 - strlen(buf));
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fputs(buf, stderr);
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fflush(stderr);
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/* Clean up the argument list routine */
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va_end(ap);
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}
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