/* See LICENSE file for copyright and license details. */ #include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include "util.h" enum { Same = 0, Diff = 1, Error = 2 }; int main(int argc, char *argv[]) { bool lflag = false; bool sflag = false; bool same = true; char c; int b[2], i; long line = 1, n = 1; FILE *fp[2]; if((c = getopt(argc, argv, "ls")) != -1) switch(c) { case 'l': lflag = true; break; case 's': sflag = true; break; default: exit(Error); } if(optind != argc-2) enprintf(Error, "usage: %s [-ls] file1 file2\n", argv[0]); for(i = 0; i < 2; i++) if(!(fp[i] = fopen(argv[optind+i], "r"))) enprintf(Error, "fopen %s:", argv[optind+i]); for(n = 1; ((b[0] = getc(fp[0])) != EOF) | ((b[1] = getc(fp[1])) != EOF); n++) { if(b[0] == '\n') line++; if(b[0] == b[1]) continue; for(i = 0; i < 2; i++) if(b[i] == EOF) enprintf(Diff, "cmp: EOF on %s\n", argv[optind+i]); if(!lflag) { if(!sflag) printf("%s %s differ: char %ld, line %ld\n", argv[optind], argv[optind+1], n, line); exit(Diff); } else { printf("%4ld %3o %3o\n", n, b[0], b[1]); same = false; } } return same ? Same : Diff; }