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/* util.h
* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Logging and other utility functions.
*/
#ifndef _UTIL_H_
#define _UTIL_H_
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <syslog.h>
#include <unistd.h>
#ifdef __cplusplus
extern "C" {
#endif
#if defined(USE_EXIT_ON_DIE)
#define do_abort() exit(1)
#else
#define do_abort() abort()
#endif
/* clang-format off */
#define die(_msg, ...) do { \
do_log(LOG_ERR, "libminijail[%d]: " _msg, getpid(), ## __VA_ARGS__); \
do_abort(); \
} while (0)
#define pdie(_msg, ...) \
die(_msg ": %m", ## __VA_ARGS__)
#define warn(_msg, ...) \
do_log(LOG_WARNING, "libminijail[%d]: " _msg, getpid(), ## __VA_ARGS__)
#define pwarn(_msg, ...) \
warn(_msg ": %m", ## __VA_ARGS__)
#define info(_msg, ...) \
do_log(LOG_INFO, "libminijail[%d]: " _msg, getpid(), ## __VA_ARGS__)
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
/* clang-format on */
extern const char *log_syscalls[];
extern const size_t log_syscalls_len;
enum logging_system_t {
/* Log to syslog. This is the default. */
LOG_TO_SYSLOG = 0,
/* Log to a file descriptor. */
LOG_TO_FD,
};
extern void do_log(int priority, const char *format, ...)
__attribute__((__format__(__printf__, 2, 3)));
static inline int is_android(void)
{
#if defined(__ANDROID__)
return 1;
#else
return 0;
#endif
}
void __asan_init(void) __attribute__((weak));
static inline int running_with_asan(void)
{
return &__asan_init != 0;
}
int lookup_syscall(const char *name);
const char *lookup_syscall_name(int nr);
long int parse_constant(char *constant_str, char **endptr);
int parse_size(size_t *size, const char *sizespec);
char *strip(char *s);
/*
* tokenize: locate the next token in @stringp using the @delim
* @stringp A pointer to the string to scan for tokens
* @delim The delimiter to split by
*
* Note that, unlike strtok, @delim is not a set of characters, but the full
* delimiter. e.g. "a,;b,;c" with a delim of ",;" will yield ["a","b","c"].
*
* Note that, unlike strtok, this may return an empty token. e.g. "a,,b" with
* strtok will yield ["a","b"], but this will yield ["a","","b"].
*/
char *tokenize(char **stringp, const char *delim);
char *path_join(const char *external_path, const char *internal_path);
/*
* consumebytes: consumes @length bytes from a buffer @buf of length @buflength
* @length Number of bytes to consume
* @buf Buffer to consume from
* @buflength Size of @buf
*
* Returns a pointer to the base of the bytes, or NULL for errors.
*/
void *consumebytes(size_t length, char **buf, size_t *buflength);
/*
* consumestr: consumes a C string from a buffer @buf of length @length
* @buf Buffer to consume
* @length Length of buffer
*
* Returns a pointer to the base of the string, or NULL for errors.
*/
char *consumestr(char **buf, size_t *buflength);
/*
* init_logging: initializes the module-wide logging.
* @logger The logging system to use.
* @fd The file descriptor to log into. Ignored unless
* @logger = LOG_TO_FD.
* @min_priority The minimum priority to display. Corresponds to syslog's
priority parameter. Ignored unless @logger = LOG_TO_FD.
*/
void init_logging(enum logging_system_t logger, int fd, int min_priority);
#ifdef __cplusplus
}; /* extern "C" */
#endif
#endif /* _UTIL_H_ */
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