SIMPLE SOLUTIONS

EXPLAIN_FTELLO_OR_DIE - reference manual online

Get stream position and report errors.

Chapter
explain_ftello_or_die(3)             Library Functions Manual            explain_ftello_or_die(3)

NAME explain_ftello_or_die - get stream position and report errors
SYNOPSIS #include <libexplain/ftello.h> off_t explain_ftello_or_die(FILE *fp); off_t explain_ftello_on_error(FILE *fp);
DESCRIPTION The explain_ftello_or_die function is used to call the ftello(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_ftello(3) function, and then the process terminates by calling exit(EXIT_FAILURE). The explain_ftello_on_error function is used to call the ftello(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_ftello(3) function, but still returns to the caller. fp The fp, exactly as to be passed to the ftello(3) system call.
RETURN VALUE The explain_ftello_or_die function only returns on success, see ftello(3) for more infor‐ mation. On failure, prints an explanation and exits, it does not return. The explain_ftello_on_error function always returns the value return by the wrapped ftello(3) system call.
EXAMPLE The explain_ftello_or_die function is intended to be used in a fashion similar to the fol‐ lowing example: off_t result = explain_ftello_or_die(fp);
SEE ALSO ftello(3) get stream position explain_ftello(3) explain ftello(3) errors exit(2) terminate the calling process
explain_ftello_or_die(3)
This manual Reference Other manuals
explain_ftello_or_die(3) referred by explain(3) | explain_ftello(3)
refer to _exit(2) | explain_ftello(3) | fseeko(3)