1 /*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)special.c 8.2 (Berkeley) 04/01/94"; 10 #endif /* not lint */ 11 12 #include <sys/types.h> 13 14 #include <err.h> 15 #include <stdlib.h> 16 #include <stdio.h> 17 #include <string.h> 18 19 #include "extern.h" 20 21 void 22 c_special(fd1, file1, skip1, fd2, file2, skip2) 23 int fd1, fd2; 24 char *file1, *file2; 25 off_t skip1, skip2; 26 { 27 int ch1, ch2; 28 off_t byte, line; 29 FILE *fp1, *fp2; 30 int dfound; 31 32 if ((fp1 = fdopen(fd1, "r")) == NULL) 33 err(ERR_EXIT, "%s", file1); 34 if ((fp2 = fdopen(fd2, "r")) == NULL) 35 err(ERR_EXIT, "%s", file2); 36 37 while (skip1--) 38 if (getc(fp1) == EOF) 39 goto eof; 40 while (skip2--) 41 if (getc(fp2) == EOF) 42 goto eof; 43 44 dfound = 0; 45 for (byte = line = 1;; ++byte) { 46 ch1 = getc(fp1); 47 ch2 = getc(fp2); 48 if (ch1 == EOF || ch2 == EOF) 49 break; 50 if (ch1 != ch2) 51 if (lflag) { 52 dfound = 1; 53 (void)printf("%6qd %3o %3o\n", byte, ch1, ch2); 54 } else 55 diffmsg(file1, file2, byte, line); 56 /* NOTREACHED */ 57 if (ch1 == '\n') 58 ++line; 59 } 60 61 eof: if (ferror(fp1)) 62 err(ERR_EXIT, "%s", file1); 63 if (ferror(fp2)) 64 err(ERR_EXIT, "%s", file2); 65 if (feof(fp1)) { 66 if (!feof(fp2)) 67 eofmsg(file1); 68 } else 69 if (feof(fp2)) 70 eofmsg(file2); 71 if (dfound) 72 exit(DIFF_EXIT); 73 } 74