void
c_regular(int fd1, const char *file1, off_t skip1, off_t len1,
int fd2, const char *file2, off_t skip2, off_t len2)
{
u_char ch, *p1, *p2, *m1, *m2, *e1, *e2;
off_t byte, length, line;
int dfound;
off_t pagemask, off1, off2;
size_t pagesize;
struct sigaction act, oact;
if (skip1 > len1)
eofmsg(file1);
len1 -= skip1;
if (skip2 > len2)
eofmsg(file2);
len2 -= skip2;
if (sflag && len1 != len2)
exit(DIFF_EXIT);
sigemptyset(&act.sa_mask);
act.sa_flags = SA_NODEFER;
act.sa_handler = segv_handler;
if (sigaction(SIGSEGV, &act, &oact))
err(ERR_EXIT, "sigaction()");
pagesize = getpagesize();
pagemask = (off_t)pagesize - 1;
off1 = ROUNDPAGE(skip1);
off2 = ROUNDPAGE(skip2);
length = MIN(len1, len2);
if ((m1 = remmap(NULL, fd1, off1)) == NULL) {
c_special(fd1, file1, skip1, fd2, file2, skip2);
return;
}
if ((m2 = remmap(NULL, fd2, off2)) == NULL) {
munmap(m1, MMAP_CHUNK);
c_special(fd1, file1, skip1, fd2, file2, skip2);
return;
}
dfound = 0;
e1 = m1 + MMAP_CHUNK;
e2 = m2 + MMAP_CHUNK;
p1 = m1 + (skip1 - off1);
p2 = m2 + (skip2 - off2);
for (byte = line = 1; length--; ++byte) {
if ((ch = *p1) != *p2) {
if (xflag) {
dfound = 1;
(void)printf("%08llx %02x %02x\n",
(long long)byte - 1, ch, *p2);
} else if (lflag) {
dfound = 1;
(void)printf("%6lld %3o %3o\n",
(long long)byte, ch, *p2);
} else
diffmsg(file1, file2, byte, line);
/* NOTREACHED */
}
if (ch == '\n')
++line;
if (++p1 == e1) {
off1 += MMAP_CHUNK;
if ((p1 = m1 = remmap(m1, fd1, off1)) == NULL) {
munmap(m2, MMAP_CHUNK);
err(ERR_EXIT, "remmap %s", file1);
}
e1 = m1 + MMAP_CHUNK;
}
if (++p2 == e2) {
off2 += MMAP_CHUNK;
if ((p2 = m2 = remmap(m2, fd2, off2)) == NULL) {
munmap(m1, MMAP_CHUNK);
err(ERR_EXIT, "remmap %s", file2);
}
e2 = m2 + MMAP_CHUNK;
}
}
munmap(m1, MMAP_CHUNK);
munmap(m2, MMAP_CHUNK);
if (sigaction(SIGSEGV, &oact, NULL))
err(ERR_EXIT, "sigaction()");
if (len1 != len2)
eofmsg (len1 > len2 ? file2 : file1);
if (dfound)
exit(DIFF_EXIT);
}
void
c_regular(int fd1, const char *file1, off_t skip1, off_t len1, int fd2,
const char *file2, off_t skip2, off_t len2)
{
u_char ch, *p1, *p2, *m1, *m2, *e1, *e2;
off_t byte, length, line;
int dfound;
off_t pagemask, off1, off2;
size_t pagesize;
if (skip1 > len1)
eofmsg(file1);
len1 -= skip1;
if (skip2 > len2)
eofmsg(file2);
len2 -= skip2;
if (sflag && len1 != len2)
exit(DIFF_EXIT);
pagesize = getpagesize();
pagemask = (off_t)pagesize - 1;
off1 = ROUNDPAGE(skip1);
off2 = ROUNDPAGE(skip2);
length = MIN(len1, len2);
if ((m1 = remmap(NULL, fd1, off1)) == NULL) {
c_special(fd1, file1, skip1, fd2, file2, skip2);
return;
}
if ((m2 = remmap(NULL, fd2, off2)) == NULL) {
munmap(m1, MMAP_CHUNK);
c_special(fd1, file1, skip1, fd2, file2, skip2);
return;
}
dfound = 0;
e1 = m1 + MMAP_CHUNK;
e2 = m2 + MMAP_CHUNK;
p1 = m1 + (skip1 - off1);
p2 = m2 + (skip2 - off2);
for (byte = line = 1; length--; ++byte) {
if ((ch = *p1) != *p2) {
if (xflag) {
dfound = 1;
printf("%08jx %02x %02x\n",
(intmax_t)byte - 1, ch, *p2);
} else if (lflag) {
dfound = 1;
printf("%6jd %3o %3o\n",
(intmax_t)byte, ch, *p2);
} else {
diffmsg(file1, file2, byte, line);
/* NOTREACHED */
}
}
if (ch == '\n')
++line;
if (++p1 == e1) {
off1 += MMAP_CHUNK;
if ((p1 = m1 = remmap(m1, fd1, off1)) == NULL) {
munmap(m2, MMAP_CHUNK);
err(ERR_EXIT, "remmap %s", file1);
}
e1 = m1 + MMAP_CHUNK;
}
if (++p2 == e2) {
off2 += MMAP_CHUNK;
if ((p2 = m2 = remmap(m2, fd2, off2)) == NULL) {
munmap(m1, MMAP_CHUNK);
err(ERR_EXIT, "remmap %s", file2);
}
e2 = m2 + MMAP_CHUNK;
}
}
munmap(m1, MMAP_CHUNK);
munmap(m2, MMAP_CHUNK);
if (len1 != len2)
eofmsg (len1 > len2 ? file2 : file1);
if (dfound)
exit(DIFF_EXIT);
}
int
c_regular(struct finfo *f0, struct finfo *f1, int opts)
{
u_char ch, *p1, *p2, *m1, *m2, *e1, *e2;
off_t byte, length, line;
int dfound;
off_t pagemask, off1, off2;
struct sigaction act, oact;
off_t len1 = f0->st->st_size;
off_t len2 = f1->st->st_size;
if ((opts & CMP_SIZEFIRST) && CMP_TAILLEN(f0) != CMP_TAILLEN(f1)) {
if (!(opts & CMP_SILENT))
(void) printf("%s %s differ: size\n",
f0->path, f1->path);
return DIFF_EXIT;
}
if (f0->skip > len1)
return eofmsg(f0, opts);
len1 -= f0->skip;
if (f1->skip > len2)
return eofmsg(f1, opts);
len2 -= f1->skip;
if ((opts & CMP_SILENT) && len1 != len2)
return DIFF_EXIT;
sigemptyset(&act.sa_mask);
act.sa_flags = SA_NODEFER;
act.sa_handler = segv_handler;
if (sigaction(SIGSEGV, &act, &oact))
err(ERR_EXIT, "sigaction()");
/* floor skips to pagesize multiples */
pagemask = (off_t)getpagesize() - 1;
off1 = f0->skip & ~pagemask;
off2 = f1->skip & ~pagemask;
length = MIN(len1, len2);
if ((m1 = remmap(NULL, f0->fd, off1)) == NULL) {
return c_special(f0, f1, opts);
}
if ((m2 = remmap(NULL, f1->fd, off2)) == NULL) {
munmap(m1, MMAP_CHUNK);
return c_special(f0, f1, opts);
}
dfound = 0;
e1 = m1 + MMAP_CHUNK;
e2 = m2 + MMAP_CHUNK;
p1 = m1 + (f0->skip - off1);
p2 = m2 + (f1->skip - off2);
for (byte = line = 1; length--; ++byte) {
if ((ch = *p1) != *p2) {
if (opts & CMP_ALLHEXES) {
dfound = 1;
(void)printf("%08llx %02x %02x\n",
(long long)byte - 1, ch, *p2);
} else if (opts & CMP_ALLDIFFS) {
dfound = 1;
(void)printf("%6lld %3o %3o\n",
(long long)byte, ch, *p2);
} else
return diffmsg(f0, f1, byte, line, opts);
}
if (ch == '\n')
++line;
if (++p1 == e1) {
off1 += MMAP_CHUNK;
if ((p1 = m1 = remmap(m1, f0->fd, off1)) == NULL) {
munmap(m2, MMAP_CHUNK);
err(ERR_EXIT, "remmap %s", f0->path);
}
e1 = m1 + MMAP_CHUNK;
}
if (++p2 == e2) {
off2 += MMAP_CHUNK;
if ((p2 = m2 = remmap(m2, f1->fd, off2)) == NULL) {
munmap(m1, MMAP_CHUNK);
err(ERR_EXIT, "remmap %s", f1->path);
}
e2 = m2 + MMAP_CHUNK;
}
}
munmap(m1, MMAP_CHUNK);
munmap(m2, MMAP_CHUNK);
if (sigaction(SIGSEGV, &oact, NULL))
err(ERR_EXIT, "sigaction()");
if (len1 != len2)
return eofmsg (len1 > len2 ? f1 : f0, opts);
if (dfound)
return DIFF_EXIT;
return OK_EXIT;
}
