kc3-lang/libbsd/src/progname.c

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• Hash : 75299746
  Author :
  Date : 2012-01-03T08:58:01
  

  Base getprogname() on program_invocation_short_name presence instead of glibc

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• src/progname.c

• /*
   * Copyright © 2006 Robert Millan
   * Copyright © 2010-2012 Guillem Jover <guillem@hadrons.org>
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
   * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
   * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  /* 
    Rejected in glibc (http://sourceware.org/ml/libc-alpha/2006-03/msg00125.html)
  */
  
  #include <errno.h>
  #include <string.h>
  #include <stdlib.h>
  
  #ifdef HAVE___PROGNAME
  extern const char *__progname;
  #else
  static const char *__progname = NULL;
  #endif
  
  const char *
  getprogname(void)
  {
  #if defined(HAVE_PROGRAM_INVOCATION_SHORT_NAME)
  	if (__progname == NULL)
  		__progname = program_invocation_short_name;
  #elif defined(HAVE_GETEXECNAME)
  	/* getexecname(3) returns an absolute pathname, normalize it. */
  	if (__progname == NULL)
  		setprogname(getexecname());
  #endif
  
  	return __progname;
  }
  
  void
  setprogname(const char *progname)
  {
  	const char *last_slash;
  
  	last_slash = strrchr(progname, '/');
  	if (last_slash == NULL)
  		__progname = progname;
  	else
  		__progname = last_slash + 1;
  }
  

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