lib/execvp.c

   1 /* execvp() function: Execute a program, replacing the current process.
   2    Copyright (C) 2020-2024 Free Software Foundation, Inc.
   3
   4    This file is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU Lesser General Public License as
   6    published by the Free Software Foundation; either version 2.1 of the
   7    License, or (at your option) any later version.
   8
   9    This file is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2020.  */
  18
  19 #include <config.h>
  20
  21 /* Specification.  */
  22 #include <unistd.h>
  23
  24 int
  25 execvp (const char *program, char * const *argv)
  26 {
  27   /* Pass the environment explicitly.  This is needed if the program has
  28      modified the environment using putenv() or [un]setenv().  On Windows,
  29      processes have two environments, one in the "environment block" of the
  30      process and managed through SetEnvironmentVariable(), and one inside the
  31      process, in the location retrieved by the 'environ' macro.  If we were
  32      to pass NULL, the child process would inherit a copy of the environment
  33      block - ignoring the effects of putenv() and [un]setenv().  */
  34   return execvpe (program, argv, environ);
  35 }