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#include <stdio.h>
int main(argc,argv)
int argc;
char **argv;
{
FILE *f1,*f2;
unsigned char c1,c2;
long pos=0;
if (argc!=3)
{
fprintf(stderr,"calling convention: %s <file1> <file2>\n",argv[0]);
return 1;
}
f1=fopen(argv[1],"rb");
if (f1==NULL)
{
perror(argv[1]); return 2;
}
f2=fopen(argv[2],"rb");
if (f2==NULL)
{
perror(argv[2]); return 2;
}
while ((!feof(f1))&&(!feof(f2)))
{
fread(&c1,1,1,f1); fread(&c2,1,1,f2);
if (c1!=c2)
{
fprintf(stderr,"compare error at position %d\n",pos);
fclose(f1); fclose(f2); return 3;
}
pos++;
}
if (feof(f1)!=feof(f2))
{
fprintf(stderr,"files have different sizes\n");
fclose(f1); fclose(f2); return 4;
}
fclose(f1); fclose(f2); return 0;
}
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