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mount,losetup: use /dev/loop-control is it exists

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function                                             old     new   delta
get_free_loop                                          -      58     +58
set_loop                                             597     649     +52
losetup_main                                         482     476      -6
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(add/remove: 1/0 grow/shrink: 1/1 up/down: 110/-6)            Total: 104 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2019-06-09 23:20:49 +02:00
parent 7b6d4f50c9
commit 3b69ba799f
3 changed files with 47 additions and 10 deletions
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7
include/libbb.h
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@ -1461,14 +1461,15 @@ extern void bb_warn_ignoring_args(char *arg) FAST_FUNC;
extern int get_linux_version_code(void) FAST_FUNC;
extern char *query_loop(const char *device) FAST_FUNC;
extern int del_loop(const char *device) FAST_FUNC;
char *query_loop(const char *device) FAST_FUNC;
int get_free_loop(void) FAST_FUNC;
int del_loop(const char *device) FAST_FUNC;
/*
* If *devname is not NULL, use that name, otherwise try to find free one,
* malloc and return it in *devname.
* return value is the opened fd to the loop device, or < on error
*/
extern int set_loop(char **devname, const char *file, unsigned long long offset, unsigned flags) FAST_FUNC;
int set_loop(char **devname, const char *file, unsigned long long offset, unsigned flags) FAST_FUNC;
/* These constants match linux/loop.h (without BB_ prefix): */
#define BB_LO_FLAGS_READ_ONLY 1
#define BB_LO_FLAGS_AUTOCLEAR 4