185 lines
5.1 KiB
C
185 lines
5.1 KiB
C
/* bubblewrap
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* Copyright (C) 2016 Alexander Larsson
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* SPDX-License-Identifier: LGPL-2.0-or-later
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#pragma once
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#include <assert.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#if 1
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#define __debug__(x) printf x
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#else
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#define __debug__(x)
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#endif
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#define UNUSED __attribute__((__unused__))
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#define N_ELEMENTS(arr) (sizeof (arr) / sizeof ((arr)[0]))
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#define TRUE 1
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#define FALSE 0
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typedef int bool;
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#define PIPE_READ_END 0
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#define PIPE_WRITE_END 1
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#ifndef PR_SET_CHILD_SUBREAPER
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#define PR_SET_CHILD_SUBREAPER 36
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#endif
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void warn (const char *format,
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...) __attribute__((format (printf, 1, 2)));
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void die_with_error (const char *format,
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...) __attribute__((__noreturn__)) __attribute__((format (printf, 1, 2)));
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void die (const char *format,
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...) __attribute__((__noreturn__)) __attribute__((format (printf, 1, 2)));
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void die_oom (void) __attribute__((__noreturn__));
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void die_unless_label_valid (const char *label);
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void fork_intermediate_child (void);
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void *xmalloc (size_t size);
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void *xcalloc (size_t size);
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void *xrealloc (void *ptr,
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size_t size);
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char *xstrdup (const char *str);
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void strfreev (char **str_array);
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void xclearenv (void);
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void xsetenv (const char *name,
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const char *value,
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int overwrite);
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void xunsetenv (const char *name);
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char *strconcat (const char *s1,
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const char *s2);
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char *strconcat3 (const char *s1,
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const char *s2,
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const char *s3);
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char * xasprintf (const char *format,
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...) __attribute__((format (printf, 1, 2)));
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bool has_prefix (const char *str,
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const char *prefix);
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bool has_path_prefix (const char *str,
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const char *prefix);
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bool path_equal (const char *path1,
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const char *path2);
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int fdwalk (int proc_fd,
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int (*cb)(void *data,
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int fd),
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void *data);
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char *load_file_data (int fd,
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size_t *size);
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char *load_file_at (int dirfd,
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const char *path);
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int write_file_at (int dirfd,
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const char *path,
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const char *content);
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int write_to_fd (int fd,
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const char *content,
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ssize_t len);
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int copy_file_data (int sfd,
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int dfd);
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int copy_file (const char *src_path,
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const char *dst_path,
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mode_t mode);
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int create_file (const char *path,
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mode_t mode,
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const char *content);
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int ensure_file (const char *path,
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mode_t mode);
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int ensure_dir (const char *path,
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mode_t mode);
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int get_file_mode (const char *pathname);
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int mkdir_with_parents (const char *pathname,
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mode_t mode,
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bool create_last);
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void create_pid_socketpair (int sockets[2]);
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void send_pid_on_socket (int socket);
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int read_pid_from_socket (int socket);
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char *get_oldroot_path (const char *path);
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char *get_newroot_path (const char *path);
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char *readlink_malloc (const char *pathname);
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/* syscall wrappers */
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int raw_clone (unsigned long flags,
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void *child_stack);
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int pivot_root (const char *new_root,
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const char *put_old);
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char *label_mount (const char *opt,
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const char *mount_label);
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int label_exec (const char *exec_label);
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int label_create_file (const char *file_label);
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static inline void
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cleanup_freep (void *p)
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{
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void **pp = (void **) p;
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if (*pp)
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free (*pp);
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}
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static inline void
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cleanup_strvp (void *p)
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{
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void **pp = (void **) p;
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strfreev (*pp);
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}
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static inline void
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cleanup_fdp (int *fdp)
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{
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int fd;
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assert (fdp);
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fd = *fdp;
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if (fd != -1)
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(void) close (fd);
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}
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#define cleanup_free __attribute__((cleanup (cleanup_freep)))
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#define cleanup_fd __attribute__((cleanup (cleanup_fdp)))
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#define cleanup_strv __attribute__((cleanup (cleanup_strvp)))
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static inline void *
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steal_pointer (void *pp)
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{
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void **ptr = (void **) pp;
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void *ref;
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ref = *ptr;
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*ptr = NULL;
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return ref;
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}
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/* type safety */
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#define steal_pointer(pp) \
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(0 ? (*(pp)) : (steal_pointer) (pp))
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