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/*
20140202
20241211 - reformated using clang-format
Jan Mojzis
Public domain.
The 'log' library is used to write log messages
on standard error output including source file,
function and line number.
Non-printable characters are replaced using '?'.
The 'log' library also supports syslog.
*/
#include <syslog.h>
#include "writeall.h"
#include "randommod.h"
#include "purge.h"
#include "numtostr.h"
#include "e.h"
#include "log.h"
static const char *logtext = "x";
static char logstring[9] = "________";
int loglevel = 1;
static int logflagfnln = 1;
static int logflagsyslog = 0;
static char chars[] =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRTSUVWXYZ0123456789";
void log_init(int level, const char *text, int line, int flagsyslog) {
unsigned long long i;
loglevel = level;
logtext = text;
logflagfnln = line;
for (i = 0; i < sizeof logstring; ++i) {
logstring[i] = chars[randommod(sizeof chars - 1)];
}
logstring[sizeof logstring - 1] = 0;
if (flagsyslog) {
openlog(text, 0, LOG_DAEMON);
logflagsyslog = 1;
}
errno = 0;
}
char *log_string(void) { return logstring; }
static char buf[257];
static unsigned long long buflen = 0;
static void flush(void) {
if (logflagsyslog) {
buf[buflen] = 0;
syslog(LOG_INFO, "%s", buf);
}
else { writeall(2, buf, buflen); }
buflen = 0;
purge(buf, buflen);
}
static void outs(const char *x) {
long long i;
for (i = 0; x[i]; ++i) {
if (buflen >= sizeof buf - 1) flush();
if (x[i] == '\n')
buf[buflen++] = '\n';
else if (x[i] < 32)
buf[buflen++] = '?';
else if (x[i] > 126)
buf[buflen++] = '?';
else
buf[buflen++] = x[i];
}
}
static void outnum(unsigned long long n) {
char b[NUMTOSTR_LEN];
outs(numtostr(b, n));
}
void log_9_(int level, int ignoreerrno, const char *f, unsigned long long l,
const char *s0, const char *s1, const char *s2, const char *s3,
const char *s4, const char *s5, const char *s6, const char *s7,
const char *s8) {
const char *s[9];
long long i;
const char *m;
if (level > loglevel) return;
s[0] = s0;
s[1] = s1;
s[2] = s2;
s[3] = s3;
s[4] = s4;
s[5] = s5;
s[6] = s6;
s[7] = s7;
s[8] = s8;
switch (level) {
case -1:
m = "BUG";
break;
case 0:
m = "usage";
break;
case 1:
m = "fatal";
break;
case 2:
if (!ignoreerrno)
m = "warning";
else
m = "info";
break;
case 3:
m = "debug";
break;
case 4:
m = "tracing";
break;
default:
m = "unknown";
break;
}
/* name: session: level: message (error){file:line} */
/* 'name:' */
do {
if (level == 0) break; /* don't print in usage level */
if (logflagsyslog) break; /* don't print in syslog mode */
outs(logtext);
outs(": ");
} while (0);
/* 'session:' */
do {
if (level == 0) break; /* don't print in usage level */
if (!logflagfnln) break; /* don't print when disabled */
outs(logstring);
outs(": ");
} while (0);
/* 'level:' */
do {
if (level == 0) break; /* don't print in usage level */
outs(m);
outs(": ");
} while (0);
/* 'message' */
for (i = 0; i < 9 && s[i]; ++i) outs(s[i]);
outs(" ");
/* '(error)' */
do {
if (!errno) break; /* don't print when errno = 0 */
if (ignoreerrno) break; /* don't print when disabled */
outs("(");
outs(e_str(errno));
outs(")");
} while (0);
/* {file:line} */
do {
if (level == 0) break; /* don't print in usage level */
if (!f) break; /* don't print when no f */
if (!l) break; /* don't print when no l */
if (!logflagfnln && level != -1)
break; /* don't print when disabled */
outs("{");
outs(f);
outs(":");
outnum(l);
outs("}");
} while (0);
outs("\n");
flush();
return;
}
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