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/*
* 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>
int
fdcompare (int fd1, int fd2)
{
register int i, n1, n2, resp;
register char *c1, *c2;
char b1[BUFSIZ], b2[BUFSIZ];
resp = 1;
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 = 0;
goto leave;
}
if (n1 < (int) sizeof(b1))
goto leave;
}
resp = 0;
leave: ;
lseek (fd1, (off_t) 0, SEEK_SET);
lseek (fd2, (off_t) 0, SEEK_SET);
return resp;
}
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