/usr/include/spf2/spf_log.h is in libspf2-dev 1.2.10-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* This program is free software; you can redistribute it and/or modify
* it under the terms of either:
*
* a) The GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1, or (at your option) any
* later version,
*
* OR
*
* b) The two-clause BSD license.
*
* These licenses can be found with the distribution in the file LICENSES
*/
#ifndef INC_SPF_LOG
#define INC_SPF_LOG
/**
* @file
* Error messages and warnings generated internally by the library call
* these routines. By default, the messages go to stderr, but you can
* define your own routines to deal with the messages instead.
*
* To use the syslog routines, add code such as:
*
* openlog(logPrefix,LOG_PID|LOG_CONS|LOG_NDELAY|LOG_NOWAIT,LOG_MAIL);
*
* SPF_error_handler = SPF_error_syslog;
* SPF_warning_handler = SPF_warning_syslog;
* SPF_info_handler = SPF_info_syslog;
* SPF_debug_handler = SPF_debug_syslog;
*/
#include <stdarg.h>
#define SPF_error(errmsg) SPF_errorx( __FILE__, __LINE__, "%s", errmsg )
void SPF_errorx( const char *file, int line, const char *format, ... ) __attribute__ ((noreturn)) __attribute__ ((format (printf, 3, 4)));
void SPF_errorx2( const char *format, ... );
void SPF_errorv( const char *file, int line, const char *format, va_list ap ) __attribute__ ((noreturn)) __attribute__ ((format (printf, 3, 0)));
#define SPF_warning(errmsg) SPF_warningx( __FILE__, __LINE__, "%s", errmsg )
void SPF_warningx( const char *file, int line, const char *format, ... ) __attribute__ ((format (printf, 3, 4)));
void SPF_warningx2( const char *format, ... );
void SPF_warningv( const char *file, int line, const char *format, va_list ap ) __attribute__ ((format (printf, 3, 0)));
#define SPF_info(errmsg) SPF_infox( __FILE__, __LINE__, "%s", errmsg )
void SPF_infox( const char *file, int line, const char *format, ... ) __attribute__ ((format (printf, 3, 4)));
void SPF_infox2( const char *format, ... );
void SPF_infov( const char *file, int line, const char *format, va_list ap ) __attribute__ ((format (printf, 3, 0)));
#define SPF_debug(errmsg) SPF_debugx( __FILE__, __LINE__, "%s", errmsg )
void SPF_debugx( const char *file, int line, const char *format, ... ) __attribute__ ((format (printf, 3, 4)));
void SPF_debugx2( const char *format, ... );
void SPF_debugv( const char *file, int line, const char *format, va_list ap ) __attribute__ ((format (printf, 3, 0)));
#if defined( __STDC_VERSION__ ) && __STDC_VERSION__ >= 199901L
#define SPF_errorf(format, ... ) SPF_errorx( __FILE__, __LINE__, format, __VA_ARGS__ )
#define SPF_warningf(format, ... ) SPF_warningx( __FILE__, __LINE__, format, __VA_ARGS__ )
#define SPF_infof(format, ... ) SPF_infox( __FILE__, __LINE__, format, __VA_ARGS__ )
#define SPF_debugf(format, ... ) SPF_debugx( __FILE__, __LINE__, format, __VA_ARGS__ )
#elif defined( __GNUC__ )
#define SPF_errorf(format... ) SPF_errorx( __FILE__, __LINE__, format )
#define SPF_warningf(format... ) SPF_warningx( __FILE__, __LINE__, format )
#define SPF_infof(format... ) SPF_infox( __FILE__, __LINE__, format )
#define SPF_debugf(format... ) SPF_debugx( __FILE__, __LINE__, format )
#else
#define SPF_errorf SPF_errorx2
#define SPF_warningf SPF_warningx2
#define SPF_infof SPF_infox2
#define SPF_debugf SPF_debugx2
#endif
/* These message handler routines print to stderr or stdout, as appropriate. */
void SPF_error_stdio( const char *file, int line, const char *errmsg ) __attribute__ ((noreturn));
void SPF_warning_stdio( const char *file, int line, const char *errmsg );
void SPF_info_stdio( const char *file __attribute__ ((unused)), int line __attribute__ ((unused)), const char *errmsg );
void SPF_debug_stdio( const char *file, int line, const char *errmsg );
/* These message handler routines send messages to syslog */
void SPF_error_syslog( const char *file, int line, const char *errmsg ) __attribute__ ((noreturn));
void SPF_warning_syslog( const char *file, int line, const char *errmsg );
void SPF_info_syslog( const char *file __attribute__ ((unused)), int line __attribute__ ((unused)), const char *errmsg );
void SPF_debug_syslog( const char *file, int line, const char *errmsg );
/* FYI only -- can't be changed without recompiling the library */
#define SPF_DEFAULT_ERROR_HANDLER SPF_error_stdio
#define SPF_DEFAULT_WARNING_HANDLER SPF_warning_stdio
#define SPF_DEFAULT_INFO_HANDLER SPF_info_stdio
#define SPF_DEFAULT_DEBUG_HANDLER SPF_debug_stdio
/*
* You can assign these global function pointers to whatever routines
* you want to handle the various types of messages. Setting them to NULL
* will cause the messages to be ignored.
*/
extern void (*SPF_error_handler)( const char *, int, const char * ) __attribute__ ((noreturn));
extern void (*SPF_warning_handler)( const char *, int, const char * );
extern void (*SPF_info_handler)( const char *, int, const char * );
extern void (*SPF_debug_handler)( const char *, int, const char * );
#define SPF_ASSERT_NOTNULL(x) \
do { if ((x) == NULL) SPF_error(#x " is NULL"); } while(0)
#endif
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