ANSI C and standard libraries

[Karl Heuer]

In article <62114 at sun.uucp> swilson%thetone at Sun.COM (Scott Wilson) writes:
>[On some deficient OS and/or C library, getchar() doesn't echo or allow
>backspacing.  Also scanf has the same problem.]
>
>(The way I solved this particular problem in LSC was to #undef
>getchar, define it be "realgetc", and write realgetc to behave
>like I thought it should.

So getchar() was a macro?  I bet your solution didn't solve the scanf()
problem, then, unless you recompiled.

>Writing realgetc was easy because fgets does echo characters and allow
>character erase, so I would just fill a buffer with fgets and hand out one
>character at a time when realgetc was called.)

Now this *is* in violation of the Standard.  All of the I/O functions are
supposed to behave as if by repeated calls to fgetc/fputc.  Echo and erase
should either be enabled in getchar(), or disabled in fgets().

Karl W. Z. Heuer (ima!haddock!karl or karl at haddock.isc.com), The Walking Lint