1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
/* fdcompare.c -- are two files identical?
*
* This code is Copyright (c) 2002, by the authors of nmh. See the
* COPYRIGHT file in the root directory of the nmh distribution for
* complete copyright information.
*/
#include "h/mh.h"
#include "fdcompare.h"
int
fdcompare (int fd1, int fd2)
{
int i, n1, n2;
char *c1, *c2;
char b1[BUFSIZ], b2[BUFSIZ];
bool resp = true;
while ((n1 = read (fd1, b1, sizeof(b1))) >= 0
&& (n2 = read (fd2, b2, sizeof(b2))) >= 0
&& n1 == n2) {
c1 = b1;
c2 = b2;
for (i = n1 < (int) sizeof(b1) ? n1 : (int) sizeof(b1); i--;)
if (*c1++ != *c2++) {
resp = false;
goto leave;
}
if (n1 < (int) sizeof(b1))
goto leave;
}
resp = false;
leave: ;
lseek(fd1, 0, SEEK_SET);
lseek(fd2, 0, SEEK_SET);
return resp;
}
|
