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Diffstat (limited to 'gnulib/doc/posix-functions/lseek.texi')
| m--------- | gnulib | 0 | ||||
| -rw-r--r-- | gnulib/doc/posix-functions/lseek.texi | 34 |
2 files changed, 34 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/doc/posix-functions/lseek.texi b/gnulib/doc/posix-functions/lseek.texi new file mode 100644 index 0000000..1c87759 --- /dev/null +++ b/gnulib/doc/posix-functions/lseek.texi @@ -0,0 +1,34 @@ +@node lseek +@section @code{lseek} +@findex lseek + +POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/lseek.html} + +Gnulib module: lseek + +Portability problems fixed by Gnulib: +@itemize +@item +On platforms where @code{off_t} is a 32-bit type, @code{lseek} does not work +correctly with files larger than 2 GB. (Cf. @code{AC_SYS_LARGEFILE}.) +@item +This function mistakenly succeeds on pipes on some platforms: mingw, MSVC 9, BeOS. +@end itemize + +Portability problems not fixed by Gnulib: +@itemize +@item +POSIX does not specify which file descriptors support seeking and which don't. +In practice, regular files and block devices support seeking, and ttys, pipes, +and most character devices don't support it. +@item +When the third argument is invalid, POSIX says that @code{lseek} should set +@code{errno} to @code{EINVAL} and return -1, but in this situation a +@code{SIGSYS} signal is raised on some platforms: +IRIX 6.5. +@item +When the @code{lseek} function fails, POSIX says that the file offset remains +unchanged. But on some platforms, attempting to set a negative file offset +fails and sets the file offset to 0: +BeOS. +@end itemize |