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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);
- }
- }
-