gdb/testsuite/gdb.base/foll-exec.c

/* This test program is part of GDB, the GNU debugger.

   Copyright 1997-2021 Free Software Foundation, Inc.

   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 3 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, see <http://www.gnu.org/licenses/>.  */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>

#include <limits.h>

int global_i = 100;

int main (int argc, char ** argv)
{
  int local_j = global_i + 1;
  int local_k = local_j + 1;
  char prog[PATH_MAX];
  int len;

  printf ("foll-exec is about to execlp(execd-prog)...\n");

  strcpy (prog, argv[0]);
  len = strlen (prog);
  /* Replace "foll-exec" with "execd-prog".  */
  memcpy (prog + len - 9, "execd-prog", 10);
  prog[len + 1] = 0;

  /* In the following function call, maximum line length exceed the limit 80.
     This is intentional and required for clang compiler such that complete
     function call should be in a single line, please do not make it
     multi-line.  */
  execlp (prog, /* tbreak-execlp */ prog, "execlp arg1 from foll-exec", (char *) 0);

  printf ("foll-exec is about to execl(execd-prog)...\n");

  /* In the following function call, maximum line length exceed the limit 80.
     This is intentional and required for clang compiler such that complete
     function call should be in a single line, please do not make it
     multi-line.  */
  execl (prog, /* tbreak-execl */ prog, "execl arg1 from foll-exec", "execl arg2 from foll-exec", (char *) 0);

  {
    static char * argv[] = {
      (char *) "",
      (char *) "execv arg1 from foll-exec",
      (char *) 0};

    argv[0] = prog;

    printf ("foll-exec is about to execv(execd-prog)...\n");

    execv (prog, argv); /* tbreak-execv */
  }
}