1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
#include "fileutil.h"
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/statvfs.h>
#include <errno.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
bool file_isReadable(char *file)
{
int fd = open( file, O_RDONLY );
if ( fd < 0 ) return false;
close( fd );
return true;
}
bool file_isWritable(char *file)
{
int fd = open( file, O_WRONLY );
if ( fd >= 0 ) {
close( fd );
return true;
}
fd = open( file, O_WRONLY | O_CREAT, 0600 );
if ( fd < 0 ) return false;
close( fd );
unlink( file );
return true;
}
bool mkdir_p(const char* path)
{
assert( path != NULL );
if ( *path == '\0' ) return true;
char buffer[strlen( path ) + 1];
strcpy( buffer, path );
char *current = buffer;
char *slash;
while ( (slash = strchr( current, '/' )) != NULL ) {
*slash = '\0';
if ( *buffer != '\0' && mkdir( buffer, 0755 ) != 0 && errno != EEXIST ) return false;
*slash = '/';
current = slash + 1;
}
if ( mkdir( buffer, 0755 ) != 0 && errno != EEXIST ) return false;
return true;
}
bool file_alloc(int fd, uint64_t offset, uint64_t size)
{
if ( fallocate( fd, 0, offset, size ) == 0 ) return true; // fast way
if ( posix_fallocate( fd, offset, size ) == 0 ) return true; // slow way
if ( lseek( fd, offset + size - 1, SEEK_SET ) != (off_t)offset ) return false; // dumb way
if ( write( fd, "", 1 ) != 1 ) return false;
return true;
}
int64_t file_freeDiskSpace(const char * const path)
{
struct statvfs fiData;
if ( (statvfs( path, &fiData )) < 0 ) {
return -1;
}
return ((int64_t)fiData.f_bavail * (int64_t)fiData.f_bsize);
}
time_t file_lastModification(const char * const file)
{
struct stat st;
if ( stat( file, &st ) != 0 ) return 0;
return st.st_mtime;
}
|
