SIMPLE SOLUTIONS

EXPLAIN_PWRITE_OR_DIE - reference manual online

Seek and write to a file descriptor and report errors.

Chapter
explain_pwrite_or_die(3)             Library Functions Manual            explain_pwrite_or_die(3)

NAME explain_pwrite_or_die - seek and write to a file descriptor and report errors
SYNOPSIS #include <libexplain/pwrite.h> ssize_t explain_pwrite_or_die(int fildes, const void *data, size_t data_size, off_t off‐ set); ssize_t explain_pwrite_on_error(int fildes, const void *data, size_t data_size, off_t off‐ set))
DESCRIPTION The explain_pwrite_or_die function is used to call the pwrite(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_pwrite(3) function, and then the process terminates by calling exit(EXIT_FAILURE). The explain_pwrite_on_error function is used to call the pwrite(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_pwrite(3) function, but still returns to the caller. fildes The fildes, exactly as to be passed to the pwrite(2) system call. data The data, exactly as to be passed to the pwrite(2) system call. data_size The data_size, exactly as to be passed to the pwrite(2) system call. offset The offset, exactly as to be passed to the pwrite(2) system call.
RETURN VALUE The explain_pwrite_or_die function only returns on success, see pwrite(2) for more infor‐ mation. On failure, prints an explanation and exits, it does not return. The explain_pwrite_on_error function always returns the value return by the wrapped pwrite(2) system call.
EXAMPLE The explain_pwrite_or_die function is intended to be used in a fashion similar to the fol‐ lowing example: ssize_t result = explain_pwrite_or_die(fildes, data, data_size, offset);
SEE ALSO pwrite(2) read from or write to a file descriptor at a given offset explain_pwrite(3) explain pwrite(2) errors exit(2) terminate the calling process
explain_pwrite_or_die(3)
This manual Reference Other manuals
explain_pwrite_or_die(3) referred by explain(3) | explain_pwrite(3)
refer to _exit(2) | explain_pwrite(3) | pread(2)