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102 lines (86 loc) · 2.88 KB
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/* libminijail-private.h
* Copyright 2011 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Values shared between libminijailpreload and libminijail, but not visible to
* the outside world.
*/
#ifndef LIBMINIJAIL_PRIVATE_H
#define LIBMINIJAIL_PRIVATE_H
#include <sys/types.h>
#ifdef __cplusplus
extern "C" {
#endif
/* Explicitly declare exported functions so that -fvisibility tricks
* can be used for testing and minimal symbol leakage occurs.
*/
#define API __attribute__((__visibility__("default")))
static const char kFdEnvVar[] = "__MINIJAIL_FD";
static const char kLdPreloadEnvVar[] = "LD_PRELOAD";
static const char kSeccompPolicyPathEnvVar[] = "SECCOMP_POLICY_PATH";
static const char kLoggingEnvVar[] = "__MINIJAIL_LOGGING";
static const char kLoggingEnvValueStderr[] = "stderr";
static const char kAltSyscallNamePlaceholder[] =
"<unknown: alt_syscall active>";
struct minijail;
/* minijail_size: returns the size (in bytes) of @j if marshalled
* @j jail to compute size of
*
* Returns 0 on error.
*/
extern size_t minijail_size(const struct minijail *j);
/* minijail_marshal: serializes @j to @buf
* @j minijail to serialize
* @buf buffer to serialize to
* @size size of @buf
*
* Returns 0 on success.
*
* Writes |j| to |buf| such that it can be reparsed by the same
* library on the same architecture. This is meant to be used
* by minijail0.c and libminijailpreload.c. minijail flags that
* require minijail_run() will be excluded.
*
* The marshalled data is not robust to differences between the child
* and parent process (personality, etc).
*/
extern int minijail_marshal(const struct minijail *j, char *buf, size_t size);
/* minijail_unmarshal: initializes @j from @serialized
* @j minijail to initialize
* @serialized serialized jail buffer
* @length length of buffer
*
* Returns 0 on success.
*/
extern int minijail_unmarshal(struct minijail *j, char *serialized,
size_t length);
/* minijail_from_fd: builds @j from @fd
* @j minijail to initialize
* @fd fd to initialize from
*
* Returns 0 on success.
*/
extern int minijail_from_fd(int fd, struct minijail *j);
/* minijail_to_fd: sends @j over @fd
* @j minijail to send
* @fd fd to send over
*
* Returns 0 on success, or a negative error code on error.
*/
extern int minijail_to_fd(struct minijail *j, int fd);
/* minijail_preexec: strips @j of all options handled by minijail_enter()
* @j jail to strip
*/
extern void minijail_preexec(struct minijail *j);
/* minijail_preenter: strips @j of all options handled by minijail_run()
* @j jail to strip
*/
extern void minijail_preenter(struct minijail *j);
/* minijail_fd_is_open: returns true if the specified file descriptor is open.
*/
extern int minijail_fd_is_open(int fd);
#ifdef __cplusplus
}; /* extern "C" */
#endif
#endif /* !LIBMINIJAIL_PRIVATE_H */