43 lines
1003 B
C
43 lines
1003 B
C
/* NetHack 3.7 stripbs.c */
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/* Copyright (c) Michael Allison, 2025. */
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/* NetHack may be freely redistributed. See license for details. */
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/*
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* a simple filter to strip character-backspace-character
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* from stdin and write the final character to stdout.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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int main(int argc, char *argv[])
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{
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int stop = 0, trouble = 0;
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char buf[2];
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char *cp = &buf[0], *prev = &buf[1];
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*prev = 0;
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while (!stop) {
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if ((fread(buf, 1, 1, stdin)) > 0) {
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if (*cp == 8) {
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*prev = 0;
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} else {
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if (*prev)
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fputc(*prev, stdout);
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*prev = *cp;
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}
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} else {
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if (errno != EOF)
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trouble = 1;
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if (*prev)
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fputc(*prev, stdout);
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stop = 1;
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}
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}
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fflush(stdout);
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fclose(stdout);
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return trouble ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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