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Sourcecode: fhist version File versions

progname.c

/*
 *    fhist - file history and comparison tools
 *    Copyright (C) 1998, 2002 Peter Miller;
 *    All rights reserved.
 *
 *    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 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 *
 * MANIFEST: functions to manipulate the program name
 */

#include <ac/string.h>

#include <progname.h>


static      char  *progname;


void
progname_set(char *s)
{
    /*
     * do NOT put tracing in this function
     * do NOT put asserts in this function
     *      they both depend on progname, which is not yet set
     */
    for (;;)
    {
      progname = strrchr(s, '/');

      /*
       * we were invoked as
       *    progname -args
       */
      if (!progname)
      {
            progname = s;
            break;
      }

      /*
       * we were invoked as
       *    /usr/local/progname -args
       */
      if (progname[1])
      {
            ++progname;
            break;
      }

      /*
       * this is real nasty:
       * it is possible to invoke us as
       *    /usr//local///bin////progname///// -args
       * and it is legal!!
       */
      *progname = 0;
    }
}


char *
progname_get(void)
{
    /* do NOT put tracing in this function */
    return (progname ? progname : "");
}

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