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root/usr/lib/crt/crt1.c

DEFINITIONS

1. __prex_main
2. _strrchr

   1 /*
   2  * Copyright (c) 2005, Kohsuke Ohtani
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  30 /*
  31  * C start up routine.
  32  */
  34 #include <unistd.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  38 extern void __libc_init(void);
  39 extern int main(int argc, char *argv[], char *envp[]);
  41 void     __prex_main(int, char **, char **);
  42 static char *_strrchr(char *, int);
  44 char    **environ;
  45 char    *__progname;
  47 void
__prex_main(int argc, char *argv[], char *envp[])
  49 {
  50         char *ap;
environ = envp;
  54         if ((ap = argv[0])) {
  55                 if ((__progname = _strrchr(ap, '/')) == NULL)
__progname = ap;
  57                 else
  58                         ++__progname;
  59         }
__libc_init();
exit(main(argc, argv, envp));
  64         /* NOTREACHED */
  65 }
  67 static char *
_strrchr(char *p, int ch)
  69 {
  70         char *save;
  72         for (save = NULL;; ++p) {
  73                 if (*p == ch)
save = (char *)p;
  75                 if (!*p)
  76                         return(save);
  77         }
  78         /* NOTREACHED */
  79 }