168 lines
4.0 KiB
C
168 lines
4.0 KiB
C
/*
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* Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
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* The President and Fellows of Harvard College.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* 4.4BSD error printing functions.
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include "host-err.h"
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#ifdef NEED_ERR
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/*
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* This is initialized by hostcompat_init
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*/
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extern const char *hostcompat_progname;
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/*
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* Common routine for all the *err* and *warn* functions.
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*/
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static
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void
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hostcompat_printerr(int use_errno, const char *fmt, va_list ap)
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{
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const char *errmsg;
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/*
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* Get the error message for the current errno.
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* Do this early, before doing anything that might change the
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* value in errno.
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*/
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errmsg = strerror(errno);
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/*
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* Look up the program name.
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* Strictly speaking we should pull off the rightmost
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* path component of argv[0] and use that as the program
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* name (this is how BSD err* prints) but it doesn't make
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* much difference.
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*/
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if (hostcompat_progname != NULL) {
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fprintf(stderr, "%s: ", hostcompat_progname);
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}
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else {
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fprintf(stderr, "libhostcompat: hostcompat_init not called\n");
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fprintf(stderr, "libhostcompat-program: ");
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}
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/* process the printf format and args */
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vfprintf(stderr, fmt, ap);
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if (use_errno) {
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/* if we're using errno, print the error string from above. */
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fprintf(stderr, ": %s\n", errmsg);
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}
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else {
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/* otherwise, just a newline. */
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fprintf(stderr, "\n");
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}
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}
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/*
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* The va_list versions of the warn/err functions.
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*/
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/* warn/vwarn: use errno, don't exit */
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void
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vwarn(const char *fmt, va_list ap)
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{
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hostcompat_printerr(1, fmt, ap);
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}
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/* warnx/vwarnx: don't use errno, don't exit */
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void
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vwarnx(const char *fmt, va_list ap)
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{
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hostcompat_printerr(0, fmt, ap);
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}
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/* err/verr: use errno, then exit */
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void
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verr(int exitcode, const char *fmt, va_list ap)
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{
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hostcompat_printerr(1, fmt, ap);
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exit(exitcode);
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}
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/* errx/verrx: don't use errno, but do then exit */
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void
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verrx(int exitcode, const char *fmt, va_list ap)
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{
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hostcompat_printerr(0, fmt, ap);
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exit(exitcode);
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}
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/*
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* The non-va_list versions of the warn/err functions.
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* Just hand off to the va_list versions.
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*/
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void
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warn(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vwarn(fmt, ap);
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va_end(ap);
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}
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void
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warnx(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vwarnx(fmt, ap);
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va_end(ap);
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}
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void
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err(int exitcode, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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verr(exitcode, fmt, ap);
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va_end(ap);
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}
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void
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errx(int exitcode, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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verrx(exitcode, fmt, ap);
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va_end(ap);
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}
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#endif /* NEED_ERR */
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