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