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/*****************************************************************************\
*
* $Id: err.c,v 1.15 2002/09/26 20:48:22 garlick Exp $
* $Source: /chaos/cvs/pdsh/err.c,v $
*
* Copyright (C) 1998-2002 The Regents of the University of California.
* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
* Written by Jim Garlick (garlick@llnl.gov>
* UCRL-CODE-980038
*
* This file is part of PDSH, a parallel remote shell program.
* For details, see <http://www.llnl.gov/linux/pdsh/>.
*
* PDSH 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 of the License, or (at your option)
* any later version.
*
* PDSH 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 PDSH; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
\*****************************************************************************/
/*
* Error printing routines with variable arguments.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdarg.h>
#include <netdb.h>
#include <string.h>
#include <assert.h>
#if HAVE_UNISTD_H
#include <unistd.h> /* gethostname */
#endif
#include <ctype.h>
#include <stdlib.h> /* exit */
#include "xstring.h"
#include "xmalloc.h"
#include "dsh.h"
static char *prog = NULL;
static char *host = NULL;
/*
* Call this before calling err() or errx(). Sets hostname and program name
* for %H, %p, and %P.
* str (IN) program name
*/
void
err_init(char *str)
{
char thishost[MAXHOSTNAMELEN];
char *p;
gethostname(thishost, MAXHOSTNAMELEN);
if ((p = strchr(thishost, '.')) != NULL)
*p = '\0';
host = Strdup(thishost);
prog = Strdup(str);
}
/*
* Free heap storage allocated by err_init()
*/
void
err_cleanup(void)
{
Free((void **)&prog);
Free((void **)&host);
}
/*
* _verr() is like vfprintf, but handles (only) the following formats:
* following formats:
* %s string
* %S string, but treat as hostname and truncate after dot
* %c character
* %m string (sys_errlist[errno])
* %d int
* %z equivalent to %.3d
* %p program name with @host attached
* %P program name
* %H hostname for this host
*/
static void
_verr(FILE *stream, char *format, va_list ap)
{
char *buf = NULL;
char *q;
int percent = 0;
char tmpstr[LINEBUFSIZE];
/* Note: snprintf silently truncates if argument exceeds size of tmpstr */
assert(prog != NULL && host != NULL);
while (format && *format) { /* iterate thru chars */
if (percent == 1) {
percent = 0;
if (*format == 's') { /* %s - string */
xstrcat(&buf, va_arg(ap, char *));
} else if (*format == 'S') { /* %S - string, trunc */
snprintf(tmpstr, sizeof(tmpstr), "%s",
va_arg(ap, char *));
if (!isdigit(*tmpstr)
&& (q = strchr(tmpstr, '.')))
*q = '\0';
xstrcat(&buf, tmpstr);
} else if (*format == 'z') { /* %z - same as %.3d */
snprintf(tmpstr, sizeof(tmpstr), "%.3d",
va_arg(ap, int));
xstrcat(&buf, tmpstr);
} else if (*format == 'c') { /* %c - character */
xstrcatchar(&buf, va_arg(ap, int));
} else if (*format == 'd') { /* %d - integer */
snprintf(tmpstr, sizeof(tmpstr), "%d",
va_arg(ap, int));
xstrcat(&buf, tmpstr);
} else if (*format == 'm') { /* %m - error code */
xstrerrorcat(&buf);
} else if (*format == 'P') { /* %P - prog name */
assert(prog != NULL);
xstrcat(&buf, prog);
} else if (*format == 'H') { /* %H - this host */
assert(host != NULL);
xstrcat(&buf, host);
} else if (*format == 'p') { /* %p - prog@host */
assert(prog != NULL);
assert(host != NULL);
snprintf(tmpstr, sizeof(tmpstr), "%s@%s", prog, host);
xstrcat(&buf, tmpstr);
} else /* pass thru */
xstrcatchar(&buf, *format);
} else if (*format == '%')
percent = 1; /* remember % */
else
xstrcatchar(&buf, *format); /* pass thru */
format++;
}
fputs(buf, stream); /* print it */
Free((void **)&buf); /* clean up */
}
void
err(char *format, ...)
{
va_list ap;
va_start(ap, format);
_verr(stderr, format, ap);
va_end(ap);
}
void
errx(char *format, ...)
{
va_list ap;
va_start(ap, format);
_verr(stderr, format, ap);
va_end(ap);
exit(1);
}
void
out(char *format, ...)
{
va_list ap;
va_start(ap, format);
_verr(stdout, format, ap);
va_end(ap);
}
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