NeoMutt  2022-04-29-247-gc6aae8
Teaching an old dog new tricks
DOXYGEN
logging.c File Reference

Logging Dispatcher. More...

#include "config.h"
#include <errno.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "logging.h"
#include "date.h"
#include "file.h"
#include "memory.h"
#include "message.h"
#include "queue.h"
#include "string2.h"
+ Include dependency graph for logging.c:

Go to the source code of this file.

Functions

static const char * timestamp (time_t stamp)
 Create a YYYY-MM-DD HH:MM:SS timestamp. More...
 
void log_file_close (bool verbose)
 Close the log file. More...
 
int log_file_open (bool verbose)
 Start logging to a file. More...
 
int log_file_set_filename (const char *file, bool verbose)
 Set the filename for the log. More...
 
int log_file_set_level (enum LogLevel level, bool verbose)
 Set the logging level. More...
 
void log_file_set_version (const char *version)
 Set the program's version number. More...
 
bool log_file_running (void)
 Is the log file running? More...
 
int log_disp_file (time_t stamp, const char *file, int line, const char *function, enum LogLevel level,...)
 Save a log line to a file - Implements log_dispatcher_t -. More...
 
int log_queue_add (struct LogLine *ll)
 Add a LogLine to the queue. More...
 
void log_queue_set_max_size (int size)
 Set a upper limit for the queue length. More...
 
void log_queue_empty (void)
 Free the contents of the queue. More...
 
void log_queue_flush (log_dispatcher_t disp)
 Replay the log queue. More...
 
int log_queue_save (FILE *fp)
 Save the contents of the queue to a temporary file. More...
 
int log_disp_queue (time_t stamp, const char *file, int line, const char *function, enum LogLevel level,...)
 Save a log line to an internal queue - Implements log_dispatcher_t -. More...
 
int log_disp_terminal (time_t stamp, const char *file, int line, const char *function, enum LogLevel level,...)
 Save a log line to the terminal - Implements log_dispatcher_t -. More...
 
int log_disp_null (time_t stamp, const char *file, int line, const char *function, enum LogLevel level,...)
 Discard log lines - Implements log_dispatcher_t -. More...
 

Variables

const char * LevelAbbr = "PEWM12345N"
 Abbreviations of logging level names. More...
 
log_dispatcher_t MuttLogger = log_disp_terminal
 The log dispatcher -. More...
 
FILE * LogFileFP = NULL
 Log file handle. More...
 
char * LogFileName = NULL
 Log file name. More...
 
int LogFileLevel = 0
 Log file level. More...
 
char * LogFileVersion = NULL
 Program version. More...
 
static struct LogLineList LogQueue = STAILQ_HEAD_INITIALIZER(LogQueue)
 In-memory list of log lines. More...
 
int LogQueueCount = 0
 Number of entries currently in the log queue. More...
 
int LogQueueMax = 0
 Maximum number of entries in the log queue. More...
 

Detailed Description

Logging Dispatcher.

Authors
  • Richard Russon

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Definition in file logging.c.

Function Documentation

◆ timestamp()

static const char * timestamp ( time_t  stamp)
static

Create a YYYY-MM-DD HH:MM:SS timestamp.

Parameters
stampUnix time
Return values
ptrTimestamp string

If stamp is 0, then the current time will be used.

Note
This function returns a pointer to a static buffer. Do not free it.

Definition at line 77 of file logging.c.

78{
79 static char buf[23] = { 0 };
80 static time_t last = 0;
81
82 if (stamp == 0)
83 stamp = mutt_date_epoch();
84
85 if (stamp != last)
86 {
87 mutt_date_localtime_format(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", stamp);
88 last = stamp;
89 }
90
91 return buf;
92}
size_t mutt_date_localtime_format(char *buf, size_t buflen, const char *format, time_t t)
Format localtime.
Definition: date.c:692
time_t mutt_date_epoch(void)
Return the number of seconds since the Unix epoch.
Definition: date.c:428
+ Here is the call graph for this function:
+ Here is the caller graph for this function:

◆ log_file_close()

void log_file_close ( bool  verbose)

Close the log file.

Parameters
verboseIf true, then log the event

Definition at line 98 of file logging.c.

99{
100 if (!LogFileFP)
101 return;
102
103 fprintf(LogFileFP, "[%s] Closing log.\n", timestamp(0));
104 fprintf(LogFileFP, "# vim: syntax=neomuttlog\n");
106 if (verbose)
107 mutt_message(_("Closed log file: %s"), LogFileName);
108}
int mutt_file_fclose(FILE **fp)
Close a FILE handle (and NULL the pointer)
Definition: file.c:152
#define mutt_message(...)
Definition: logging.h:86
FILE * LogFileFP
Log file handle.
Definition: logging.c:54
static const char * timestamp(time_t stamp)
Create a YYYY-MM-DD HH:MM:SS timestamp.
Definition: logging.c:77
char * LogFileName
Log file name.
Definition: logging.c:55
#define _(a)
Definition: message.h:28
+ Here is the call graph for this function:
+ Here is the caller graph for this function:

◆ log_file_open()

int log_file_open ( bool  verbose)

Start logging to a file.

Parameters
verboseIf true, then log the event
Return values
0Success
-1Error, see errno

Before opening a log file, call log_file_set_version(), log_file_set_level() and log_file_set_filename().

Definition at line 119 of file logging.c.

120{
121 if (!LogFileName)
122 return -1;
123
124 if (LogFileFP)
125 log_file_close(false);
126
128 return -1;
129
131 if (!LogFileFP)
132 return -1;
133 setvbuf(LogFileFP, NULL, _IOLBF, 0);
134
135 fprintf(LogFileFP, "[%s] NeoMutt%s debugging at level %d\n", timestamp(0),
137 if (verbose)
138 mutt_message(_("Debugging at level %d to file '%s'"), LogFileLevel, LogFileName);
139 return 0;
140}
FILE * mutt_file_fopen(const char *path, const char *mode)
Call fopen() safely.
Definition: file.c:618
char * LogFileVersion
Program version.
Definition: logging.c:57
int LogFileLevel
Log file level.
Definition: logging.c:56
void log_file_close(bool verbose)
Close the log file.
Definition: logging.c:98
@ LL_DEBUG1
Log at debug level 1.
Definition: logging.h:40
#define NONULL(x)
Definition: string2.h:37
+ Here is the call graph for this function:
+ Here is the caller graph for this function:

◆ log_file_set_filename()

int log_file_set_filename ( const char *  file,
bool  verbose 
)

Set the filename for the log.

Parameters
fileName to use
verboseIf true, then log the event
Return values
0Success, file opened
-1Error, see errno

Definition at line 149 of file logging.c.

150{
151 if (!file)
152 return -1;
153
154 /* also handles both being NULL */
155 if (mutt_str_equal(LogFileName, file))
156 return 0;
157
159
160 if (!LogFileName)
161 log_file_close(verbose);
162
163 return log_file_open(verbose);
164}
int log_file_open(bool verbose)
Start logging to a file.
Definition: logging.c:119
bool mutt_str_equal(const char *a, const char *b)
Compare two strings.
Definition: string.c:807
char * mutt_str_replace(char **p, const char *s)
Replace one string with another.
Definition: string.c:326
+ Here is the call graph for this function:
+ Here is the caller graph for this function:

◆ log_file_set_level()

int log_file_set_level ( enum LogLevel  level,
bool  verbose 
)

Set the logging level.

Parameters
levelLogging level
verboseIf true, then log the event
Return values
0Success
-1Error, level is out of range

The level should be: LL_MESSAGE <= level < LL_MAX.

Definition at line 175 of file logging.c.

176{
177 if ((level < LL_MESSAGE) || (level >= LL_MAX))
178 return -1;
179
180 if (level == LogFileLevel)
181 return 0;
182
183 LogFileLevel = level;
184
185 if (level == LL_MESSAGE)
186 {
187 log_file_close(verbose);
188 }
189 else if (LogFileFP)
190 {
191 if (verbose)
192 mutt_message(_("Logging at level %d to file '%s'"), LogFileLevel, LogFileName);
193 fprintf(LogFileFP, "[%s] NeoMutt%s debugging at level %d\n", timestamp(0),
195 }
196 else
197 {
198 log_file_open(verbose);
199 }
200
201 if (LogFileLevel >= LL_DEBUG5)
202 {
203 fprintf(LogFileFP, "\n"
204 "WARNING:\n"
205 " Logging at this level can reveal personal information.\n"
206 " Review the log carefully before posting in bug reports.\n"
207 "\n");
208 }
209
210 return 0;
211}
@ LL_DEBUG5
Log at debug level 5.
Definition: logging.h:44
@ LL_MESSAGE
Log informational message.
Definition: logging.h:39
@ LL_MAX
Definition: logging.h:47
+ Here is the call graph for this function:
+ Here is the caller graph for this function:

◆ log_file_set_version()

void log_file_set_version ( const char *  version)

Set the program's version number.

Parameters
versionVersion number

The string will be appended directly to 'NeoMutt', so it should begin with a hyphen.

Definition at line 220 of file logging.c.

221{
223}
+ Here is the call graph for this function:
+ Here is the caller graph for this function:

◆ log_file_running()

bool log_file_running ( void  )

Is the log file running?

Return values
trueThe log file is running

Definition at line 229 of file logging.c.

230{
231 return LogFileFP;
232}
+ Here is the caller graph for this function:

◆ log_queue_add()

int log_queue_add ( struct LogLine ll)

Add a LogLine to the queue.

Parameters
llLogLine to add
Return values
numEntries in the queue

If LogQueueMax is non-zero, the queue will be limited to this many items.

Definition at line 285 of file logging.c.

286{
287 if (!ll)
288 return -1;
289
290 STAILQ_INSERT_TAIL(&LogQueue, ll, entries);
291
292 if ((LogQueueMax > 0) && (LogQueueCount >= LogQueueMax))
293 {
294 ll = STAILQ_FIRST(&LogQueue);
295 STAILQ_REMOVE_HEAD(&LogQueue, entries);
296 FREE(&ll->message);
297 FREE(&ll);
298 }
299 else
300 {
302 }
303 return LogQueueCount;
304}
static struct LogLineList LogQueue
In-memory list of log lines.
Definition: logging.c:62
int LogQueueMax
Maximum number of entries in the log queue.
Definition: logging.c:65
int LogQueueCount
Number of entries currently in the log queue.
Definition: logging.c:64
#define FREE(x)
Definition: memory.h:43
#define STAILQ_REMOVE_HEAD(head, field)
Definition: queue.h:422
#define STAILQ_FIRST(head)
Definition: queue.h:350
#define STAILQ_INSERT_TAIL(head, elm, field)
Definition: queue.h:389
char * message
Message to be logged.
Definition: logging.h:79
+ Here is the caller graph for this function:

◆ log_queue_set_max_size()

void log_queue_set_max_size ( int  size)

Set a upper limit for the queue length.

Parameters
sizeNew maximum queue length
Note
size of 0 means unlimited

Definition at line 312 of file logging.c.

313{
314 if (size < 0)
315 size = 0;
316 LogQueueMax = size;
317}
+ Here is the caller graph for this function:

◆ log_queue_empty()

void log_queue_empty ( void  )

Free the contents of the queue.

Free any log lines in the queue.

Definition at line 324 of file logging.c.

325{
326 struct LogLine *ll = NULL;
327 struct LogLine *tmp = NULL;
328
329 STAILQ_FOREACH_SAFE(ll, &LogQueue, entries, tmp)
330 {
331 STAILQ_REMOVE(&LogQueue, ll, LogLine, entries);
332 FREE(&ll->message);
333 FREE(&ll);
334 }
335
336 LogQueueCount = 0;
337}
#define STAILQ_REMOVE(head, elm, type, field)
Definition: queue.h:402
#define STAILQ_FOREACH_SAFE(var, head, field, tvar)
Definition: queue.h:362
A Log line.
Definition: logging.h:73
+ Here is the caller graph for this function:

◆ log_queue_flush()

void log_queue_flush ( log_dispatcher_t  disp)

Replay the log queue.

Parameters
dispLog dispatcher - Implements log_dispatcher_t

Pass all of the log entries in the queue to the log dispatcher provided. The queue will be emptied afterwards.

Definition at line 346 of file logging.c.

347{
348 struct LogLine *ll = NULL;
349 STAILQ_FOREACH(ll, &LogQueue, entries)
350 {
351 disp(ll->time, ll->file, ll->line, ll->function, ll->level, "%s", ll->message);
352 }
353
355}
void log_queue_empty(void)
Free the contents of the queue.
Definition: logging.c:324
#define STAILQ_FOREACH(var, head, field)
Definition: queue.h:352
const char * file
Source file.
Definition: logging.h:75
const char * function
C function.
Definition: logging.h:77
int line
Line number in source file.
Definition: logging.h:76
enum LogLevel level
Log level, e.g. LL_DEBUG1.
Definition: logging.h:78
time_t time
Timestamp of the message.
Definition: logging.h:74
+ Here is the call graph for this function:
+ Here is the caller graph for this function:

◆ log_queue_save()

int log_queue_save ( FILE *  fp)

Save the contents of the queue to a temporary file.

Parameters
fpOpen file handle
Return values
numLines written to the file

The queue is written to a temporary file. The format is:

  • [HH:MM:SS]<LEVEL> FORMATTED-MESSAGE
Note
The caller should delete the file

Definition at line 367 of file logging.c.

368{
369 if (!fp)
370 return 0;
371
372 char buf[32] = { 0 };
373 int count = 0;
374 struct LogLine *ll = NULL;
375 STAILQ_FOREACH(ll, &LogQueue, entries)
376 {
377 mutt_date_localtime_format(buf, sizeof(buf), "%H:%M:%S", ll->time);
378 fprintf(fp, "[%s]<%c> %s", buf, LevelAbbr[ll->level + 3], ll->message);
379 if (ll->level <= LL_MESSAGE)
380 fputs("\n", fp);
381 count++;
382 }
383
384 return count;
385}
const char * LevelAbbr
Abbreviations of logging level names.
Definition: logging.c:45
+ Here is the call graph for this function:
+ Here is the caller graph for this function:

Variable Documentation

◆ LevelAbbr

const char* LevelAbbr = "PEWM12345N"

Abbreviations of logging level names.

Definition at line 45 of file logging.c.

◆ LogFileFP

FILE* LogFileFP = NULL

Log file handle.

Definition at line 54 of file logging.c.

◆ LogFileName

char* LogFileName = NULL

Log file name.

Definition at line 55 of file logging.c.

◆ LogFileLevel

int LogFileLevel = 0

Log file level.

Definition at line 56 of file logging.c.

◆ LogFileVersion

char* LogFileVersion = NULL

Program version.

Definition at line 57 of file logging.c.

◆ LogQueue

struct LogLineList LogQueue = STAILQ_HEAD_INITIALIZER(LogQueue)
static

In-memory list of log lines.

Definition at line 62 of file logging.c.

◆ LogQueueCount

int LogQueueCount = 0

Number of entries currently in the log queue.

Definition at line 64 of file logging.c.

◆ LogQueueMax

int LogQueueMax = 0

Maximum number of entries in the log queue.

Definition at line 65 of file logging.c.