?? error.c
字號(hào):
#include "unpipc.h"
#include <stdarg.h> /* ANSI C header file */
#include <syslog.h> /* for syslog() */
int daemon_proc; /* set nonzero by daemon_init() */
static void err_doit(int, int, const char *, va_list);
/* Nonfatal error related to a system call.
* Print a message and return. */
/* $$.ix [err_ret]~function,~source~code$$ */
void
err_ret(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
err_doit(1, LOG_INFO, fmt, ap);
va_end(ap);
return;
}
/* Fatal error related to a system call.
* Print a message and terminate. */
/* $$.ix [err_sys]~function,~source~code$$ */
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);
}
/* Fatal error related to a system call.
* Print a message, dump core, and terminate. */
/* $$.ix [err_dump]~function,~source~code$$ */
void
err_dump(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
err_doit(1, LOG_ERR, fmt, ap);
va_end(ap);
abort(); /* dump core and terminate */
exit(1); /* shouldn't get here */
}
/* Nonfatal error unrelated to a system call.
* Print a message and return. */
/* $$.ix [err_msg]~function,~source~code$$ */
void
err_msg(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
err_doit(0, LOG_INFO, fmt, ap);
va_end(ap);
return;
}
/* Fatal error unrelated to a system call.
* Print a message and terminate. */
/* $$.ix [err_quit]~function,~source~code$$ */
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);
}
/* Print a message and return to caller.
* Caller specifies "errnoflag" and "level". */
/* $$.ix [err_doit]~function,~source~code$$ */
static void
err_doit(int errnoflag, int level, const char *fmt, va_list ap)
{
int errno_save, n;
char buf[MAXLINE];
errno_save = errno; /* value caller might want printed */
#ifdef HAVE_VSNPRINTF
vsnprintf(buf, sizeof(buf), fmt, ap); /* this is safe */
#else
vsprintf(buf, fmt, ap); /* this is not safe */
#endif
n = strlen(buf);
if (errnoflag)
snprintf(buf+n, sizeof(buf)-n, ": %s", strerror(errno_save));
strcat(buf, "\n");
if (daemon_proc) {
syslog(level, buf);
} else {
fflush(stdout); /* in case stdout and stderr are the same */
fputs(buf, stderr);
fflush(stderr);
}
return;
}
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