diff options
Diffstat (limited to 'include/unistd.h')
| -rw-r--r-- | include/unistd.h | 109 |
1 files changed, 104 insertions, 5 deletions
diff --git a/include/unistd.h b/include/unistd.h index c6c1711..dc8e5d5 100644 --- a/include/unistd.h +++ b/include/unistd.h @@ -1259,13 +1259,112 @@ char* getpass(const char*) +#if defined(__PLAN9_SOURCE) || defined(__SLIBC_SOURCE) +/** + * Variant of `read` that will read until the request + * amount of that has been read, or there is no more + * data to read. This function will block signals so + * that it cannot throw `EINTR`, which could mean that + * read data is lost. Note however, it may fail for + * any other reason resulting in lost data. + * + * This is a Plan 9 from Bell Labs compliant slibc extension. + * + * @etymology (Read) all `(n)byte` bytes! + * + * @param fd The file descriptor whence the data shall be read. + * @param buf The buffer whither the read data shall be stored. + * @param nbyte The number of bytes to read. + * + * @throws Any error specified for read(3), except `EINTR`. + * + * @since Always. + */ +ssize_t readn(int, void*, size_t); +#endif + +#if defined(__SLIBC_SOURCE) +/** + * Variant of `write` that will write until all given + * data has been written. This function will block signals + * so that it cannot throw `EINTR`, which could mean that + * you do not know how much data has been successfully + * written. Note however, it may fail for any other reason + * resulting in the same problem. + * + * This is a slibc extension. + * + * @etymology (Write) all `(n)byte` bytes! + * + * @param fd The file descriptor whither the data shall be write. + * @param buf The data to write. + * @param nbyte The number of bytes to write. + * + * @throws Any error specified for write(3), except `EINTR`. + * + * @since Always. + */ +ssize_t writen(int, const void*, size_t); + +/** + * Variant of `pread` that will read until the request + * amount of that has been read, or there is no more + * data to read. This function will block signals so + * that it cannot throw `EINTR`, which could mean that + * read data is lost. Note however, it may fail for + * any other reason resulting in lost data. + * + * This is a slibc extension. + * + * @etymology Variant of `(pread)` that reads all `(n)byte` bytes! + * + * @param fd The file descriptor whence the data shall be read. + * @param buf The buffer whither the read data shall be stored. + * @param nbyte The number of bytes to read. + * @param offset Whence in the file the read begins. + * + * @throws Any error specified for pread(3), except `EINTR`. + * + * @since Always. + */ +ssize_t preadn(int, void*, size_t, off_t); + +/** + * Variant of `pwrite` that will write until all given + * data has been written. This function will block signals + * so that it cannot throw `EINTR`, which could mean that + * you do not know how much data has been successfully + * written. Note however, it may fail for any other reason + * resulting in the same problem. + * + * This is a slibc extension. + * + * @etymology Variant of `(pwrite)` that writes all `(n)byte` bytes! + * + * @param fd The file descriptor whither the data shall be write. + * @param buf The data to write. + * @param nbyte The number of bytes to write. + * @param offset Whence in the file the write begins. + * + * @throws Any error specified for pwrite(3), except `EINTR`. + * + * @since Always. + */ +ssize_t pwriten(int, const void*, size_t); +#endif + + + #endif /* - TODO readn(plan9), writen, preadn, pwriten - readn: read that can only return with a short read on error - writen: write that can only return with a short write on error - preadn: pread that can only return with a short read on error - pwriten: pwrite that can only return with a short write on error + TODO ssize_t writeatleast(int, const void*, size_t min, size_t max, size_t*); + TODO ssize_t pwriteatleast(int, const void*, size_t min, size_t max, off_t, size_t*); + TODO ssize_t readatleast(int, void**, size_t min, size_t max, size_t*); + TODO ssize_t preadatleast(int, void**, size_t min, size_t max, off_t, size_t*); + TODO int dup2atleast(int, int); + TODO int dup3atleast(int, int, int); + TODO for dup3 and dup3atleast, a flag to specify the the oldfd shall close + TODO for dup3 and dup3atleast, a flag to specify the the oldfd shall be /dev/null */ |