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
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
/*
Compare two files line by line, output differences to stderr.
Exit status is 0 if files are the same, 1 if different.
Author: Frederic.Devernay@m4x.org
*/
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int main(int argc, char **argv)
{
FILE *fp1, *fp2;
char buf1[1024], buf2[1024];
int differences = 0;
if (argc != 3) {
fprintf(stderr,"Usage: %s filename1 filename2\n", argv[0]);
exit(2);
}
fp1 = fopen(argv[1],"r");
if (fp1 == NULL) {
perror("Error: cannot open input file");
exit(1);
}
fp2 = fopen(argv[2], "r");
if (fp2 == NULL) {
perror("Error: cannot open input file");
exit(1);
}
while (fgets(buf1, sizeof(buf1), fp1) != NULL)
{
if(fgets(buf2, sizeof(buf2), fp2) == NULL) {
fprintf(stderr, "<%s", buf1);
++differences;
}
else if(strcmp(buf1, buf2) != 0)
{
fprintf(stderr, "<%s", buf1);
fprintf(stderr, ">%s", buf2);
++differences;
}
}
while(fgets(buf2, sizeof(buf2), fp2) != NULL) {
fprintf(stderr, ">%s", buf2);
++differences;
}
if (differences != 0) {
fprintf(stderr,"Total differences between files '%s' and '%s': %d lines\n",
argv[1], argv[2], differences);
}
exit(differences != 0);
}
|
