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vrb_read
Langue: en
Version: 2002-09-30 (debian - 07/07/09)
Section: 3 (Bibliothèques de fonctions)
NAME
vrb_read - read data into a VRBLIBRARY
-lvrbSYNOPSIS
#include <vrb.h>size_t vrb_read(vrb_p vrb, int fd, size_t size);
DESCRIPTION
vrb_read reads data from a specified open file descriptor using read(2) into the specified virtual ring buffer until the specified maximum length has been read, the buffer is full, or end-of-file, or an error is returned (including EAGAIN or EWOULDBLOCK for a non-blocking descriptor).ARGUMENTS
vrb_p vrbspecifies which virtual ring buffer.
int fd
specifies the open file descriptor to read from
size_t size
specifies the maximum length to read, or ~0 for unlimited.
RETURN VALUE
size_tIf successful, the actual length of data read into the buffer is returned. If end-of-file occurs, the return value is ~0 and errno is 0. If an error occurs from read(2), the return value is ~0 and errno is set by read(2). Note that this is a different way of returning an end-of-file condition than read(2) uses.
ERRORS
If an error is returned, then errno will have one of the following values:- 0
- An end-of-file has occurred. Note that this is a different way of returning an end-of-file condition than read(2) uses.
- EINVAL
- An invalid virtual ring buffer pointer was specified.
SEE ALSO
vrb(3), vrb_capacity(3), vrb_data_len(3), vrb_data_ptr(3), vrb_destroy(3), vrb_get(3), vrb_get_min(3), vrb_give(3), vrb_init(3), vrb_init_opt(3), vrb_is_empty(3), vrb_is_full(3), vrb_is_not_empty(3), vrb_is_not_full(3), vrb_move(3), vrb_new(3), vrb_new_opt(3), vrb_put(3), vrb_put_all(3), vrb_read_min(3), vrb_resize(3), vrb_space_len(3), vrb_space_ptr(3), vrb_take(3), vrb_uninit(3), vrb_write(3), vrb_write_min(3), read(2)Contenus ©2006-2024 Benjamin Poulain
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