30 lines
572 B
C
30 lines
572 B
C
#include <stdio.h>
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#include <unistd.h> // read, isatty
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// STDIN_FILENO
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int process_fn(int fn)
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{
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char c[1];
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while (read(fn, c, sizeof(c)) > 0) {
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printf("%c", c[0]);
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}
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return 0;
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}
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int main(int argc, char** argv)
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{
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if (!isatty(STDIN_FILENO)) {
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return process_fn(STDIN_FILENO);
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} else if (argc > 1) {
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FILE* fp = fopen(argv[1], "r");
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if (!fp) {
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perror("Could not open file");
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return 1;
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}
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return process_fn(fileno(fp));
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} else {
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printf("To do");
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}
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return 0;
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}
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