SIMPLE SOLUTIONS

EXPLAIN_VSNPRINTF_OR_DIE - reference manual online

Formatted output conversion and report errors.

Chapter
explain_vsnprintf_or_die(3)          Library Functions Manual         explain_vsnprintf_or_die(3)

NAME explain_vsnprintf_or_die - formatted output conversion and report errors
SYNOPSIS #include <libexplain/vsnprintf.h> int explain_vsnprintf_or_die(char *data, size_t data_size, const char *format, va_list ap); int explain_vsnprintf_on_error(char *data, size_t data_size, const char *format, va_list ap);
DESCRIPTION The explain_vsnprintf_or_die function is used to call the vsnprintf(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_vsnprintf(3) function, and then the process terminates by calling exit(EXIT_FAILURE). The explain_vsnprintf_on_error function is used to call the vsnprintf(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_vsnprintf(3) function, but still returns to the caller. data The data, exactly as to be passed to the vsnprintf(3) system call. data_size The data_size, exactly as to be passed to the vsnprintf(3) system call. format The format, exactly as to be passed to the vsnprintf(3) system call. ap The ap, exactly as to be passed to the vsnprintf(3) system call.
RETURN VALUE The explain_vsnprintf_or_die function only returns on success, see vsnprintf(3) for more information. On failure, prints an explanation and exits, it does not return. The explain_vsnprintf_on_error function always returns the value return by the wrapped vsnprintf(3) system call.
EXAMPLE The explain_vsnprintf_or_die function is intended to be used in a fashion similar to the following example: int result = explain_vsnprintf_or_die(data, data_size, format, ap);
SEE ALSO vsnprintf(3) formatted output conversion explain_vsnprintf(3) explain vsnprintf(3) errors exit(2) terminate the calling process
explain_vsnprintf_or_die(3)
This manual Reference Other manuals
explain_vsnprintf_or_die(3) referred by explain(3) | explain_vsnprintf(3)
refer to _exit(2) | explain_vsnprintf(3) | printf(3)