SIMPLE SOLUTIONS

EXPLAIN_UNGETC_OR_DIE - reference manual online

Push a character back to a stream and report errors.

Chapter
explain_ungetc_or_die(3)             Library Functions Manual            explain_ungetc_or_die(3)

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