libc/src/unistd/linux/execve.cpp

   1 //===-- Linux implementation of execve ------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "src/unistd/execve.h"
  10 #include "src/unistd/environ.h"
  11
  12 #include "src/__support/OSUtil/syscall.h" // For internal syscall function.
  13 #include "src/__support/common.h"
  14
  15 #include "src/errno/libc_errno.h"
  16 #include <sys/syscall.h> // For syscall numbers.
  17
  18 namespace LIBC_NAMESPACE {
  19
  20 LLVM_LIBC_FUNCTION(int, execve,
  21                    (const char *path, char *const argv[], char *const envp[])) {
  22   int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_execve, path, argv, envp);
  23   if (ret < 0) {
  24     libc_errno = -ret;
  25     return -1;
  26   }
  27
  28   // Control will not reach here on success but have a return statement will
  29   // keep the compilers happy.
  30   return ret;
  31 }
  32
  33 } // namespace LIBC_NAMESPACE