diplodocus.org Git - nmh/blob - docs/historical/mh-6.8.5/sbr/RCS/fdcompare.c,v

   1 head    1.4;
   2 access;
   3 symbols;
   4 locks; strict;
   5 comment @ * @;
   6
   7
   8 1.4
   9 date    93.08.25.18.29.28;      author jromine; state Exp;
  10 branches;
  11 next    1.3;
  12
  13 1.3
  14 date    93.08.25.17.43.26;      author jromine; state Exp;
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  16 next    1.2;
  17
  18 1.2
  19 date    93.08.25.17.19.34;      author jromine; state Exp;
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  21 next    1.1;
  22
  23 1.1
  24 date    93.08.25.17.19.21;      author jromine; state Exp;
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  27
  28
  29 desc
  30 @@
  31
  32
  33 1.4
  34 log
  35 @need sys/types.h
  36 @
  37 text
  38 @/* fdcompare.c - are two files identical? */
  39 #ifndef lint
  40 static char Id[] = "@@(#)$Id: fdcompare.c,v 1.3 1993/08/25 17:43:26 jromine Exp jromine $";
  41 #endif
  42
  43 #include "../h/mh.h"
  44 #include <stdio.h>
  45 #include <sys/types.h>  /* for off_t */
  46
  47 off_t lseek();
  48
  49
  50 fdcompare (fd1, fd2)
  51 register int fd1,
  52              fd2;
  53 {
  54     register int    i,
  55                     n1,
  56                     n2,
  57                     resp;
  58     register char  *c1,
  59                    *c2;
  60     char    b1[BUFSIZ],
  61             b2[BUFSIZ];
  62
  63     resp = 1;
  64     while ((n1 = read (fd1, b1, sizeof b1)) >= 0
  65             && (n2 = read (fd2, b2, sizeof b2)) >= 0
  66             && n1 == n2) {
  67         c1 = b1;
  68         c2 = b2;
  69         for (i = n1 < sizeof b1 ? n1 : sizeof b1; i--;)
  70             if (*c1++ != *c2++) {
  71                 resp = 0;
  72                 goto leave;
  73             }
  74         if (n1 < sizeof b1)
  75             goto leave;
  76     }
  77     resp = 0;
  78
  79 leave: ;
  80     (void) lseek (fd1, (off_t)0, 0);
  81     (void) lseek (fd2, (off_t)0, 0);
  82     return resp;
  83 }
  84 @
  85
  86
  87 1.3
  88 log
  89 @add id
  90 @
  91 text
  92 @d3 1
  93 a3 1
  94 static char Id[] = "@@(#)$Id:$";
  95 d8 1
  96 @
  97
  98
  99 1.2
 100 log
 101 @off_t fixes for BSD44
 102 @
 103 text
 104 @d2 3
 105 @
 106
 107
 108 1.1
 109 log
 110 @Initial revision
 111 @
 112 text
 113 @d6 1
 114 a6 1
 115 long lseek();
 116 d39 2
 117 a40 2
 118     (void) lseek (fd1, 0L, 0);
 119     (void) lseek (fd2, 0L, 0);
 120 @