libc/src/unistd/linux/execv.cpp

   1 //===-- Linux implementation of execv -------------------------------------===//
   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/execv.h"
  10 #include "src/__support/macros/config.h"
  11 #include "src/unistd/environ.h"
  12
  13 #include "src/__support/OSUtil/syscall.h" // For internal syscall function.
  14 #include "src/__support/common.h"
  15
  16 #include "src/errno/libc_errno.h"
  17 #include <sys/syscall.h> // For syscall numbers.
  18
  19 namespace LIBC_NAMESPACE_DECL {
  20
  21 LLVM_LIBC_FUNCTION(int, execv, (const char *path, char *const argv[])) {
  22   int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_execve, path, argv,
  23                                               LIBC_NAMESPACE::environ);
  24   if (ret < 0) {
  25     libc_errno = -ret;
  26     return -1;
  27   }
  28
  29   // Control will not reach here on success but have a return statement will
  30   // keep the compilers happy.
  31   return ret;
  32 }
  33
  34 } // namespace LIBC_NAMESPACE_DECL