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/*
** error.c -- main error handling routines
**
** This code is Copyright (c) 2002, by the authors of nmh. See the
** COPYRIGHT file in the root directory of the nmh distribution for
** complete copyright information.
*/
#include <h/mh.h>
#include <errno.h>
#include <stdarg.h>
/*
** print out error message
*/
void
advise(char *what, char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
advertise(what, NULL, fmt, ap);
va_end(ap);
}
/*
** print out error message and exit
*/
void
adios(int status, char *what, char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
advertise(what, NULL, fmt, ap);
va_end(ap);
exit(status);
}
/*
** admonish the user
*/
void
admonish(char *what, char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
advertise(what, "continuing...", fmt, ap);
va_end(ap);
}
/*
** main routine for printing error messages.
**
** Until 2011-11-01, this routine used writev(). In order to remove
** ``sexy'' syscalls, in favor for mainstream programming, I removed
** it. But I want to preserve the following comment:
**
** Use writev() if available, for slightly better performance.
** Why? Well, there are a couple of reasons. Primarily, it
** gives a smoother output... More importantly though, it's a
** sexy syscall()...
**
** advertise() does *not* use writev() anymore, and that's good so.
** -- meillo@marmaro.de
*/
void
advertise(char *what, char *tail, char *fmt, va_list ap)
{
int eindex = errno;
fflush(stdout);
if (invo_name && *invo_name)
fprintf(stderr, "%s: ", invo_name);
vfprintf(stderr, fmt, ap);
if (what) {
char *s;
if (*what)
fprintf(stderr, " %s: ", what);
if ((s = strerror(eindex)))
fprintf(stderr, "%s", s);
else
fprintf(stderr, "Error %d", eindex);
}
if (tail)
fprintf(stderr, ", %s", tail);
fputc('\n', stderr);
}
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