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/* SPDX-License-Identifier: GPL-3.0-or-later */
#ifndef UTIL_H
#define UTIL_H
#include "config.h"
#include <sys/types.h>
#include <stdint.h>
/* layout structure for sparse files, indicating where the actual data is */
typedef struct sparse_map_t {
struct sparse_map_t *next;
uint64_t offset;
uint64_t count;
} sparse_map_t;
/*
Convert back to forward slashed, remove all preceeding and trailing slashes,
collapse all sequences of slashes, remove all path components that are '.'
and returns failure state if one of the path components is '..'.
Returns 0 on success.
*/
int canonicalize_name(char *filename);
/*
A wrapper around the write() system call. It retries the write if it is
interrupted by a signal or only part of the data was written. Returns 0
on success. Writes to stderr on failure using 'errstr' as a perror style
error prefix.
*/
int write_data(const char *errstr, int fd, const void *data, size_t size);
/*
A wrapper around the read() system call. It retries the read if it is
interrupted by a signal or less than the desired size was read. Returns 0
on success. Writes to stderr on failure using 'errstr' as a perror style
error prefix.
*/
int read_data(const char *errstr, int fd, void *buffer, size_t size);
/*
Similar to read_data but wrapps pread() instead of read().
*/
int read_data_at(const char *errstr, off_t location,
int fd, void *buffer, size_t size);
/*
A common implementation of the '--version' command line flag.
Prints out version information. The program name is extracted from the
BSD style __progname global variable.
*/
void print_version(void);
/*
A wrapper around mkdir() that behaves like 'mkdir -p'. It tries to create
every component of the given path and skips already existing entries.
Returns 0 on success.
*/
int mkdir_p(const char *path);
/* Returns 0 on success. On failure, prints error message to stderr. */
int pushd(const char *path);
/* Same as pushd, but the string doesn't have to be null-terminated. */
int pushdn(const char *path, size_t len);
/* Returns 0 on success. On failure, prints error message to stderr. */
int popd(void);
/*
Write zero bytes to an output file to padd it to specified block size.
Returns 0 on success. On failure, prints error message to stderr.
*/
int padd_file(int outfd, uint64_t size, size_t blocksize);
#endif /* UTIL_H */
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