lib/execv.c

   1 /* execv() function: Execute a program, replacing the current process.
   2    Copyright (C) 2020-2021 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program 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 General Public License for more details.
  13
  14    You should have received a copy of the GNU 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 execv (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 execve (program, argv, environ);
  35 }