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/* error.c -- error handler for noninteractive utilities
Copyright (C) 1990-1992 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* David MacKenzie */
/* Brian Berliner added support for CVS */
#include "cvs.h"
#include <stdio.h>
/* If non-zero, error will use the CVS protocol to stdout to report error
messages. This will only be set in the CVS server parent process;
most other code is run via do_cvs_command, which forks off a child
process and packages up its stderr in the protocol. */
int error_use_protocol;
#ifdef HAVE_VPRINTF
#if __STDC__
#include <stdarg.h>
#define VA_START(args, lastarg) va_start(args, lastarg)
#else /* ! __STDC__ */
#include <varargs.h>
#define VA_START(args, lastarg) va_start(args)
#endif /* __STDC__ */
#else /* ! HAVE_VPRINTF */
#ifdef HAVE_DOPRNT
#define va_alist args
#define va_dcl int args;
#else /* ! HAVE_DOPRNT */
#define va_alist a1, a2, a3, a4, a5, a6, a7, a8
#define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8;
#endif /* HAVE_DOPRNT */
#endif /* HAVE_VPRINTF */
#if STDC_HEADERS
#include <stdlib.h>
#include <string.h>
#else /* ! STDC_HEADERS */
#if __STDC__
void exit(int status);
#else /* ! __STDC__ */
void exit ();
#endif /* __STDC__ */
#endif /* STDC_HEADERS */
extern char *strerror ();
extern int vasprintf ();
typedef void (*fn_returning_void) PROTO((void));
/* Function to call before exiting. */
static fn_returning_void cleanup_fn;
fn_returning_void
error_set_cleanup (arg)
fn_returning_void arg;
{
fn_returning_void retval = cleanup_fn;
cleanup_fn = arg;
return retval;
}
/* Print the program name and error message MESSAGE, which is a printf-style
format string with optional args.
If ERRNUM is nonzero, print its corresponding system error message.
Exit with status EXIT_FAILURE if STATUS is nonzero. */
/* VARARGS */
void
#if defined (HAVE_VPRINTF) && __STDC__
error (int status, int errnum, const char *message, ...)
#else
error (status, errnum, message, va_alist)
int status;
int errnum;
const char *message;
va_dcl
#endif
{
FILE *out = stderr;
#ifdef HAVE_VPRINTF
va_list args;
#endif
if (error_use_protocol)
{
out = stdout;
printf ("E ");
}
#ifdef HAVE_VPRINTF
{
char *mess = NULL;
char *entire;
size_t len;
VA_START (args, message);
vasprintf (&mess, message, args);
va_end (args);
if (mess == NULL)
{
entire = NULL;
status = 1;
}
else
{
len = strlen (mess) + strlen (program_name) + 80;
if (command_name != NULL)
len += strlen (command_name);
if (errnum != 0)
len += strlen (strerror (errnum));
entire = malloc (len);
if (entire == NULL)
{
free (mess);
status = 1;
}
else
{
strcpy (entire, program_name);
if (command_name != NULL && command_name[0] != '\0')
{
strcat (entire, " ");
if (status != 0)
strcat (entire, "[");
strcat (entire, command_name);
if (status != 0)
strcat (entire, " aborted]");
}
strcat (entire, ": ");
strcat (entire, mess);
if (errnum != 0)
{
strcat (entire, ": ");
strcat (entire, strerror (errnum));
}
strcat (entire, "\n");
free (mess);
}
}
if (error_use_protocol)
fputs (entire ? entire : "out of memory", out);
else
cvs_outerr (entire ? entire : "out of memory", 0);
if (entire != NULL)
free (entire);
}
#else /* No HAVE_VPRINTF */
/* I think that all relevant systems have vprintf these days. But
just in case, I'm leaving this code here. */
if (command_name && *command_name)
{
if (status)
fprintf (out, "%s [%s aborted]: ", program_name, command_name);
else
fprintf (out, "%s %s: ", program_name, command_name);
}
else
fprintf (out, "%s: ", program_name);
#ifdef HAVE_VPRINTF
VA_START (args, message);
vfprintf (out, message, args);
va_end (args);
#else
#ifdef HAVE_DOPRNT
_doprnt (message, &args, out);
#else
fprintf (out, message, a1, a2, a3, a4, a5, a6, a7, a8);
#endif
#endif
if (errnum)
fprintf (out, ": %s", strerror (errnum));
putc ('\n', out);
#endif /* No HAVE_VPRINTF */
/* In the error_use_protocol case, this probably does something useful.
In most other cases, I suspect it is a noop (either stderr is line
buffered or we haven't written anything to stderr) or unnecessary
(if stderr is not line buffered, maybe there is a reason....). */
fflush (out);
if (status)
{
if (cleanup_fn)
(*cleanup_fn) ();
exit (EXIT_FAILURE);
}
}
/* Print the program name and error message MESSAGE, which is a printf-style
format string with optional args to the file specified by FP.
If ERRNUM is nonzero, print its corresponding system error message.
Exit with status EXIT_FAILURE if STATUS is nonzero. */
/* VARARGS */
void
#if defined (HAVE_VPRINTF) && __STDC__
fperror (FILE *fp, int status, int errnum, char *message, ...)
#else
fperror (fp, status, errnum, message, va_alist)
FILE *fp;
int status;
int errnum;
char *message;
va_dcl
#endif
{
#ifdef HAVE_VPRINTF
va_list args;
#endif
fprintf (fp, "%s: ", program_name);
#ifdef HAVE_VPRINTF
VA_START (args, message);
vfprintf (fp, message, args);
va_end (args);
#else
#ifdef HAVE_DOPRNT
_doprnt (message, &args, fp);
#else
fprintf (fp, message, a1, a2, a3, a4, a5, a6, a7, a8);
#endif
#endif
if (errnum)
fprintf (fp, ": %s", strerror (errnum));
putc ('\n', fp);
fflush (fp);
if (status)
{
if (cleanup_fn)
(*cleanup_fn) ();
exit (EXIT_FAILURE);
}
}
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