1/* Copyright (C) 1991-2024 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library 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 GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <unistd.h>
19#include <getcwd.h>
20#include <hurd.h>
21#include <hurd/fd.h>
22#include <fcntl.h>
23#include <stdlib.h>
24#include <stdio.h>
25
26/* Replace the current process, executing FILE_NAME with arguments ARGV and
27 environment ENVP. ARGV and ENVP are terminated by NULL pointers. */
28int
29__execveat (int dirfd, const char *file_name, char *const argv[],
30 char *const envp[], int flags)
31{
32 error_t err;
33 char *concat_name = NULL;
34 const char *abs_path;
35
36 file_t file = __file_name_lookup_at (dirfd, flags, file_name, O_EXEC, 0);
37 if (file == MACH_PORT_NULL)
38 return -1;
39
40 if (file_name[0] == '/')
41 {
42 /* Already an absolute path */
43 abs_path = file_name;
44 }
45 else
46 {
47 /* Relative path */
48 char *cwd;
49 if (dirfd == AT_FDCWD)
50 {
51 cwd = __getcwd (NULL, 0);
52 if (cwd == NULL)
53 {
54 __mach_port_deallocate (__mach_task_self (), file);
55 return -1;
56 }
57 }
58 else
59 {
60 err = HURD_DPORT_USE (dirfd,
61 (cwd = __hurd_canonicalize_directory_name_internal (port, NULL, 0),
62 cwd == NULL ? errno : 0));
63 if (err)
64 {
65 __mach_port_deallocate (__mach_task_self (), file);
66 return __hurd_fail (err);
67 }
68 }
69
70 int res = __asprintf (&concat_name, "%s/%s", cwd, file_name);
71 free (ptr: cwd);
72 if (res == -1)
73 {
74 __mach_port_deallocate (__mach_task_self (), file);
75 return -1;
76 }
77
78 abs_path = concat_name;
79 }
80
81 /* Hopefully this will not return. */
82 err = _hurd_exec_paths (__mach_task_self (), file,
83 file_name, abs_path, argv, envp);
84
85 /* Oh well. Might as well be tidy. */
86 __mach_port_deallocate (__mach_task_self (), file);
87 free (ptr: concat_name);
88
89 return __hurd_fail (err);
90}
91
92weak_alias (__execveat, execveat)
93

source code of glibc/sysdeps/mach/hurd/execveat.c