This source file includes following definitions.
- rpl_lseek
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17 #include <config.h>
18
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20 #include <unistd.h>
21
22 #if defined _WIN32 && ! defined __CYGWIN__
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25 # include <windows.h>
26
27 # if GNULIB_MSVC_NOTHROW
28 # include "msvc-nothrow.h"
29 # else
30 # include <io.h>
31 # endif
32 #else
33 # include <sys/stat.h>
34 #endif
35 #include <errno.h>
36
37 #undef lseek
38
39 off_t
40 rpl_lseek (int fd, off_t offset, int whence)
41 {
42 #if defined _WIN32 && ! defined __CYGWIN__
43
44 HANDLE h = (HANDLE) _get_osfhandle (fd);
45 if (h == INVALID_HANDLE_VALUE)
46 {
47 errno = EBADF;
48 return -1;
49 }
50 if (GetFileType (h) != FILE_TYPE_DISK)
51 {
52 errno = ESPIPE;
53 return -1;
54 }
55 #elif defined __APPLE__ && defined __MACH__ && defined SEEK_DATA
56 if (whence == SEEK_DATA)
57 {
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67 off_t next_hole = lseek (fd, offset, SEEK_HOLE);
68 if (next_hole < 0)
69 return errno == ENXIO ? offset : next_hole;
70 if (next_hole != offset)
71 whence = SEEK_SET;
72 }
73 #else
74
75 struct stat statbuf;
76 if (fstat (fd, &statbuf) < 0)
77 return -1;
78 if (!S_ISREG (statbuf.st_mode))
79 {
80 errno = ESPIPE;
81 return -1;
82 }
83 #endif
84 #if _GL_WINDOWS_64_BIT_OFF_T || (defined __MINGW32__ && defined _FILE_OFFSET_BITS && (_FILE_OFFSET_BITS == 64))
85 return _lseeki64 (fd, offset, whence);
86 #else
87 return lseek (fd, offset, whence);
88 #endif
89 }