Execve

Execute process using environment

Declaration

Source position: line 0

Description

Replaces the currently running program with the program, specified in path. It gives the program the options in args, and the environment in ep. They are pointers to an array of pointers to null-terminated strings. The last pointer in this array should be nil. On success, execve does not return.

Errors

Errors are reported in LinuxError:

sys_eacces

File is not a regular file, or has no execute permission. A compononent of the path has no search permission.

sys_eperm

The file system is mounted noexec.

sys_e2big

Argument list too big.

sys_enoexec

The magic number in the file is incorrect.

sys_enoent

The file does not exist.

sys_enomem

Not enough memory for kernel.

sys_enotdir

A component of the path is not a directory.

sys_eloop

The path contains a circular reference (via symlinks).

See also

Example

Program Example7;

{ Program to demonstrate the Execve function. }

Uses oldlinux, strings;

Const Arg0 : PChar = '/bin/ls';
      Arg1 : Pchar = '-l';

Var PP : PPchar;


begin
  GetMem (PP,3*SizeOf(Pchar));
  PP[0]:=Arg0;
  PP[1]:=Arg1;
  PP[3]:=Nil;
  { Execute '/bin/ls -l', with current environment }
  { Envp is defined in system.inc }
  ExecVe ('/bin/ls',pp,envp);
end.