/*
module: errlib.c
purpose: library of error functions
reference: Stevens, Unix network programming (2ed), p.922
*/
#include "errlib.h"
#define MAXLINE 4095
#ifdef __CPLUSPLUS
extern "C" {
#endif
int daemon_proc = 0; /* set to 0 if stdout/stderr available, else set to 1 */
static void err_doit (int errnoflag, int level, const char *fmt, va_list ap)
{
int errno_save = errno, n;
char buf[MAXLINE+1];
vsnprintf (buf, MAXLINE, fmt, ap);
n = strlen(buf);
if (errnoflag)
snprintf (buf+n, MAXLINE-n, ": %s", strerror(errno_save));
strcat (buf, "\n");
if (daemon_proc)
syslog (level, buf);
else {
fflush (stdout);
fprintf (stderr, buf);
fflush (stderr);
}
return;
}
void err_ret (const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
err_doit (1, LOG_INFO, fmt, ap);
va_end (ap);
return;
}
void err_sys (const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
err_doit (1, LOG_ERR, fmt, ap);
va_end (ap);
exit (1);
}
void err_msg (const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
err_doit (0, LOG_INFO, fmt, ap);
va_end (ap);
return;
}
void err_quit (const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
err_doit (0, LOG_ERR, fmt, ap);
va_end (ap);
exit (1);
}
void err_dump (const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
err_doit (1, LOG_ERR, fmt, ap);
va_end (ap);
abort();
}
#ifdef __CPLUSPLUS
}
#endif