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#ifndef _TOOLS_UTIL_H
#define _TOOLS_UTIL_H
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <linux/bug.h>
#include <linux/byteorder.h>
#include <linux/kernel.h>
#include <linux/log2.h>
#include <linux/string.h>
#include <linux/types.h>
#include "ccan/darray/darray.h"
#define die(arg, ...) \
do { \
fprintf(stderr, arg "\n", ##__VA_ARGS__); \
exit(EXIT_FAILURE); \
} while (0)
#define mprintf(...) \
({ \
char *_str; \
asprintf(&_str, __VA_ARGS__); \
_str; \
})
static inline void *xcalloc(size_t count, size_t size)
{
void *p = calloc(count, size);
if (!p)
die("insufficient memory");
return p;
}
static inline void *xmalloc(size_t size)
{
void *p = malloc(size);
if (!p)
die("insufficient memory");
memset(p, 0, size);
return p;
}
static inline void xpread(int fd, void *buf, size_t count, off_t offset)
{
ssize_t r = pread(fd, buf, count, offset);
if (r != count)
die("read error (ret %zi)", r);
}
static inline void xpwrite(int fd, const void *buf, size_t count, off_t offset)
{
ssize_t r = pwrite(fd, buf, count, offset);
if (r != count)
die("write error (ret %zi err %s)", r, strerror(errno));
}
#define xopenat(_dirfd, _path, ...) \
({ \
int _fd = openat((_dirfd), (_path), __VA_ARGS__); \
if (_fd < 0) \
die("Error opening %s: %s", (_path), strerror(errno)); \
_fd; \
})
#define xopen(...) xopenat(AT_FDCWD, __VA_ARGS__)
static inline struct stat xfstatat(int dirfd, const char *path, int flags)
{
struct stat stat;
if (fstatat(dirfd, path, &stat, flags))
die("stat error: %s", strerror(errno));
return stat;
}
static inline struct stat xfstat(int fd)
{
struct stat stat;
if (fstat(fd, &stat))
die("stat error: %s", strerror(errno));
return stat;
}
#define xioctl(_fd, _nr, ...) \
do { \
if (ioctl((_fd), (_nr), ##__VA_ARGS__)) \
die(#_nr " ioctl error: %s", strerror(errno)); \
} while (0)
enum units {
BYTES,
SECTORS,
HUMAN_READABLE,
};
struct units_buf __pr_units(u64, enum units);
struct units_buf {
char b[20];
};
#define pr_units(_v, _u) __pr_units(_v, _u).b
char *read_file_str(int, const char *);
u64 read_file_u64(int, const char *);
ssize_t read_string_list_or_die(const char *, const char * const[],
const char *);
u64 get_size(const char *, int);
unsigned get_blocksize(const char *, int);
int open_for_format(const char *, bool);
int bcachectl_open(void);
struct bcache_handle {
int ioctl_fd;
int sysfs_fd;
};
struct bcache_handle bcache_fs_open(const char *);
bool ask_yn(void);
struct range {
u64 start;
u64 end;
};
typedef darray(struct range) ranges;
static inline void range_add(ranges *data, u64 offset, u64 size)
{
darray_append(*data, (struct range) {
.start = offset,
.end = offset + size
});
}
void ranges_sort_merge(ranges *);
void ranges_roundup(ranges *, unsigned);
void ranges_rounddown(ranges *, unsigned);
struct hole_iter {
ranges r;
size_t idx;
u64 end;
};
static inline struct range hole_iter_next(struct hole_iter *iter)
{
struct range r = {
.start = iter->idx ? iter->r.item[iter->idx - 1].end : 0,
.end = iter->idx < iter->r.size
? iter->r.item[iter->idx].start : iter->end,
};
BUG_ON(r.start > r.end);
iter->idx++;
return r;
}
#define for_each_hole(_iter, _ranges, _end, _i) \
for (_iter = (struct hole_iter) { .r = _ranges, .end = _end }; \
(_iter.idx <= _iter.r.size && \
(_i = hole_iter_next(&_iter), true));)
#include <linux/fiemap.h>
struct fiemap_iter {
struct fiemap f;
struct fiemap_extent fe[1024];
unsigned idx;
int fd;
};
static inline void fiemap_iter_init(struct fiemap_iter *iter, int fd)
{
memset(iter, 0, sizeof(*iter));
iter->f.fm_extent_count = ARRAY_SIZE(iter->fe);
iter->f.fm_length = FIEMAP_MAX_OFFSET;
iter->fd = fd;
}
struct fiemap_extent fiemap_iter_next(struct fiemap_iter *);
#define fiemap_for_each(fd, iter, extent) \
for (fiemap_iter_init(&iter, fd); \
(extent = fiemap_iter_next(&iter)).fe_length;)
const char *strcmp_prefix(const char *, const char *);
unsigned hatoi_validate(const char *, const char *);
#endif /* _TOOLS_UTIL_H */
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