dlog.h(3) libdaemon dlog.h(3)
NAME
dlog.h - Contains a robust API for logging messages.
SYNOPSIS
#include <syslog.h>
#include <stdarg.h>
Macros
#define DAEMON_GCC_PRINTF_ATTR(a, b)
A macro for making use of GCCs printf compilation warnings.
#define DAEMON_LOGV_AVAILABLE 1
This variable is defined to 1 iff daemon_logv() is supported.
#define DAEMON_SET_VERBOSITY_AVAILABLE 1
This variable is defined to 1 iff daemon_set_verbosity() is
available.
Enumerations
enum daemon_log_flags { DAEMON_LOG_SYSLOG = 1, DAEMON_LOG_STDERR = 2,
DAEMON_LOG_STDOUT = 4, DAEMON_LOG_AUTO = 8 }
Specifies where to send the log messages to.
Functions
void daemon_log (int prio, const char *t,...) DAEMON_GCC_PRINTF_ATTR(2
Log a message using printf format strings using the specified syslog
priority.
void daemon_logv (int prio, const char *t, va_list ap)
Same as daemon_log(), but without variadic arguments.
char * daemon_ident_from_argv0 (char *argv0)
Return a sensible syslog identification for daemon_log_ident
generated from argv[0].
void daemon_set_verbosity (int verbosity_prio)
Setter for the verbosity level of standard output.
Variables
enum daemon_log_flags daemon_log_use
This variable is used to specify the log target(s) to use.
const char * daemon_log_ident
Specifies the syslog identification, use daemon_ident_from_argv0()
to set this to a sensible value or generate your own.
Detailed Description
Contains a robust API for logging messages.
Definition in file dlog.h.
Macro Definition Documentation
#define DAEMON_GCC_PRINTF_ATTR(a, b)
A macro for making use of GCCs printf compilation warnings.
Definition at line 59 of file dlog.h.
#define DAEMON_LOGV_AVAILABLE 1
This variable is defined to 1 iff daemon_logv() is supported.
Since
0.11
See also
daemon_logv()
Definition at line 72 of file dlog.h.
#define DAEMON_SET_VERBOSITY_AVAILABLE 1
This variable is defined to 1 iff daemon_set_verbosity() is available.
Since
0.14
See also
daemon_set_verbosity()
Definition at line 92 of file dlog.h.
Enumeration Type Documentation
enum daemon_log_flags
Specifies where to send the log messages to. The global variable
daemon_log_use takes values of this type.
Enumerator
DAEMON_LOG_SYSLOG
Log messages are written to syslog.
DAEMON_LOG_STDERR
Log messages are written to STDERR.
DAEMON_LOG_STDOUT
Log messages are written to STDOUT.
DAEMON_LOG_AUTO
If this is set a daemon_fork() will change this to
DAEMON_LOG_SYSLOG in the daemon process.
Definition at line 38 of file dlog.h.
Function Documentation
char* daemon_ident_from_argv0 (char * argv0)
Return a sensible syslog identification for daemon_log_ident generated
from argv[0]. This will return a pointer to the file name of argv[0],
i.e. strrchr(argv[0], '\')+1
Parameters
argv0 argv[0] as passed to main()
Returns
The identification string
Examples
testd.c.
void daemon_log (int prio, const char * t, ...)
Log a message using printf format strings using the specified syslog
priority.
Parameters
prio The syslog priority (PRIO_xxx constants)
t,... The text message to log
Examples
testd.c.
void daemon_logv (int prio, const char * t, va_list ap)
Same as daemon_log(), but without variadic arguments.
Since
0.11
See also
DAEMON_LOGV_AVAILABLE
void daemon_set_verbosity (int verbosity_prio)
Setter for the verbosity level of standard output.
Parameters
verbosity_prio Minimum priority level for messages to output on
standard output/error
Allows to decide which messages to output on standard output/error
streams. All messages are logged to syslog and this setting does not
influence that.
The default value is LOG_WARNING.
Since
0.14
See also
DAEMON_SET_VERBOSITY_AVAILABLE
Variable Documentation
const char* daemon_log_ident [extern]
Specifies the syslog identification, use daemon_ident_from_argv0() to
set this to a sensible value or generate your own.
Examples
testd.c.
enum daemon_log_flags daemon_log_use [extern]
This variable is used to specify the log target(s) to use. Defaults to
DAEMON_LOG_STDERR|DAEMON_LOG_AUTO
Author
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Version 0.14 Mon Dec 21 2020 dlog.h(3)
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