/* do what is asked for, for the path name */
static void
handle_pathname(char *path)
{
char *opath = path, *s = NULL;
ssize_t len;
int slen;
struct stat sb;
/* check for stdout/stdin */
if (path[0] == '-' && path[1] == '\0') {
if (dflag)
handle_stdin();
else
handle_stdout();
return;
}
retry:
if (stat(path, &sb) != 0 || (fflag == 0 && cflag == 0 &&
lstat(path, &sb) != 0)) {
/* lets try <path>.gz if we're decompressing */
if (dflag && s == NULL && errno == ENOENT) {
len = strlen(path);
slen = suffixes[0].ziplen;
s = malloc(len + slen + 1);
if (s == NULL)
maybe_err("malloc");
memcpy(s, path, len);
memcpy(s + len, suffixes[0].zipped, slen + 1);
path = s;
goto retry;
}
maybe_warn("can't stat: %s", opath);
goto out;
}
if (S_ISDIR(sb.st_mode)) {
#ifndef SMALL
if (rflag)
handle_dir(path);
else
#endif
maybe_warnx("%s is a directory", path);
goto out;
}
if (S_ISREG(sb.st_mode))
handle_file(path, &sb);
else
maybe_warnx("%s is not a regular file", path);
out:
if (s)
free(s);
}
/* check the outfile is OK. */
static int
check_outfile(const char *outfile)
{
struct stat sb;
int ok = 1;
if (lflag == 0 && stat(outfile, &sb) == 0) {
if (fflag)
unlink(outfile);
else if (isatty(STDIN_FILENO)) {
char ans[10] = { 'n', '\0' }; /* default */
fprintf(stderr, "%s already exists -- do you wish to "
"overwrite (y or n)? " , outfile);
(void)fgets(ans, sizeof(ans) - 1, stdin);
if (ans[0] != 'y' && ans[0] != 'Y') {
fprintf(stderr, "\tnot overwriting\n");
ok = 0;
} else
unlink(outfile);
} else {
maybe_warnx("%s already exists -- skipping", outfile);
ok = 0;
}
}
return ok;
}
static void
handle_stdout(void)
{
off_t gsize, usize;
struct stat sb;
time_t systime;
uint32_t mtime;
int ret;
#ifndef SMALL
if (fflag == 0 && isatty(STDOUT_FILENO)) {
maybe_warnx("standard output is a terminal -- ignoring");
return;
}
#endif
/* If stdin is a file use its mtime, otherwise use current time */
ret = fstat(STDIN_FILENO, &sb);
#ifndef SMALL
if (ret < 0) {
maybe_warn("Can't stat stdin");
return;
}
#endif
if (S_ISREG(sb.st_mode))
mtime = (uint32_t)sb.st_mtime;
else {
systime = time(NULL);
#ifndef SMALL
if (systime == -1) {
maybe_warn("time");
return;
}
#endif
mtime = (uint32_t)systime;
}
usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime);
#ifndef SMALL
if (vflag && !tflag && usize != -1 && gsize != -1)
print_verbage(NULL, NULL, usize, gsize);
#endif
}
/*
* uncompress input to output then close the input. return the
* uncompressed size written, and put the compressed sized read
* into `*gsizep'.
*/
static off_t
gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep,
const char *filename)
{
z_stream z;
char *outbufp, *inbufp;
off_t out_tot = -1, in_tot = 0;
uint32_t out_sub_tot = 0;
enum {
GZSTATE_MAGIC0,
GZSTATE_MAGIC1,
GZSTATE_METHOD,
GZSTATE_FLAGS,
GZSTATE_SKIPPING,
GZSTATE_EXTRA,
GZSTATE_EXTRA2,
GZSTATE_EXTRA3,
GZSTATE_ORIGNAME,
GZSTATE_COMMENT,
GZSTATE_HEAD_CRC1,
GZSTATE_HEAD_CRC2,
GZSTATE_INIT,
GZSTATE_READ,
GZSTATE_CRC,
GZSTATE_LEN,
} state = GZSTATE_MAGIC0;
int flags = 0, skip_count = 0;
int error = Z_STREAM_ERROR, done_reading = 0;
uLong crc = 0;
ssize_t wr;
int needmore = 0;
#define ADVANCE() { z.next_in++; z.avail_in--; }
if ((outbufp = malloc(BUFLEN)) == NULL) {
maybe_err("malloc failed");
goto out2;
}
if ((inbufp = malloc(BUFLEN)) == NULL) {
maybe_err("malloc failed");
goto out1;
}
memset(&z, 0, sizeof z);
z.avail_in = prelen;
z.next_in = (unsigned char *)pre;
z.avail_out = BUFLEN;
z.next_out = (unsigned char *)outbufp;
z.zalloc = NULL;
z.zfree = NULL;
z.opaque = 0;
in_tot = prelen;
out_tot = 0;
for (;;) {
if ((z.avail_in == 0 || needmore) && done_reading == 0) {
ssize_t in_size;
if (z.avail_in > 0) {
memmove(inbufp, z.next_in, z.avail_in);
}
z.next_in = (unsigned char *)inbufp;
in_size = read(in, z.next_in + z.avail_in,
BUFLEN - z.avail_in);
if (in_size == -1) {
maybe_warn("failed to read stdin");
goto stop_and_fail;
} else if (in_size == 0) {
done_reading = 1;
}
z.avail_in += in_size;
needmore = 0;
in_tot += in_size;
}
if (z.avail_in == 0) {
if (done_reading && state != GZSTATE_MAGIC0) {
maybe_warnx("%s: unexpected end of file",
filename);
goto stop_and_fail;
}
goto stop;
}
switch (state) {
case GZSTATE_MAGIC0:
if (*z.next_in != GZIP_MAGIC0) {
if (in_tot > 0) {
maybe_warnx("%s: trailing garbage "
"ignored", filename);
goto stop;
}
maybe_warnx("input not gziped (MAGIC0)");
goto stop_and_fail;
}
ADVANCE();
state++;
out_sub_tot = 0;
crc = crc32(0L, Z_NULL, 0);
break;
case GZSTATE_MAGIC1:
if (*z.next_in != GZIP_MAGIC1 &&
*z.next_in != GZIP_OMAGIC1) {
maybe_warnx("input not gziped (MAGIC1)");
goto stop_and_fail;
}
ADVANCE();
state++;
break;
case GZSTATE_METHOD:
if (*z.next_in != Z_DEFLATED) {
maybe_warnx("unknown compression method");
goto stop_and_fail;
}
ADVANCE();
state++;
break;
case GZSTATE_FLAGS:
flags = *z.next_in;
ADVANCE();
skip_count = 6;
state++;
break;
case GZSTATE_SKIPPING:
if (skip_count > 0) {
skip_count--;
ADVANCE();
} else
state++;
break;
case GZSTATE_EXTRA:
if ((flags & EXTRA_FIELD) == 0) {
state = GZSTATE_ORIGNAME;
break;
}
skip_count = *z.next_in;
ADVANCE();
state++;
break;
case GZSTATE_EXTRA2:
skip_count |= ((*z.next_in) << 8);
ADVANCE();
state++;
break;
case GZSTATE_EXTRA3:
if (skip_count > 0) {
skip_count--;
ADVANCE();
} else
state++;
break;
case GZSTATE_ORIGNAME:
if ((flags & ORIG_NAME) == 0) {
state++;
break;
}
if (*z.next_in == 0)
state++;
ADVANCE();
break;
case GZSTATE_COMMENT:
if ((flags & COMMENT) == 0) {
state++;
break;
}
if (*z.next_in == 0)
state++;
ADVANCE();
break;
case GZSTATE_HEAD_CRC1:
if (flags & HEAD_CRC)
skip_count = 2;
else
skip_count = 0;
state++;
break;
case GZSTATE_HEAD_CRC2:
if (skip_count > 0) {
skip_count--;
ADVANCE();
} else
state++;
break;
case GZSTATE_INIT:
if (inflateInit2(&z, -MAX_WBITS) != Z_OK) {
maybe_warnx("failed to inflateInit");
goto stop_and_fail;
}
state++;
break;
case GZSTATE_READ:
error = inflate(&z, Z_FINISH);
switch (error) {
/* Z_BUF_ERROR goes with Z_FINISH... */
case Z_BUF_ERROR:
if (z.avail_out > 0 && !done_reading)
continue;
case Z_STREAM_END:
case Z_OK:
break;
case Z_NEED_DICT:
maybe_warnx("Z_NEED_DICT error");
goto stop_and_fail;
case Z_DATA_ERROR:
maybe_warnx("data stream error");
goto stop_and_fail;
case Z_STREAM_ERROR:
maybe_warnx("internal stream error");
goto stop_and_fail;
case Z_MEM_ERROR:
maybe_warnx("memory allocation error");
goto stop_and_fail;
default:
maybe_warn("unknown error from inflate(): %d",
error);
}
wr = BUFLEN - z.avail_out;
if (wr != 0) {
crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr);
if (
#ifndef SMALL
/* don't write anything with -t */
tflag == 0 &&
#endif
write(out, outbufp, wr) != wr) {
maybe_warn("error writing to output");
goto stop_and_fail;
}
out_tot += wr;
out_sub_tot += wr;
}
if (error == Z_STREAM_END) {
inflateEnd(&z);
state++;
}
z.next_out = (unsigned char *)outbufp;
z.avail_out = BUFLEN;
break;
case GZSTATE_CRC:
{
uLong origcrc;
if (z.avail_in < 4) {
if (!done_reading) {
needmore = 1;
continue;
}
maybe_warnx("truncated input");
goto stop_and_fail;
}
origcrc = ((unsigned)z.next_in[0] & 0xff) |
((unsigned)z.next_in[1] & 0xff) << 8 |
((unsigned)z.next_in[2] & 0xff) << 16 |
((unsigned)z.next_in[3] & 0xff) << 24;
if (origcrc != crc) {
maybe_warnx("invalid compressed"
" data--crc error");
goto stop_and_fail;
}
}
z.avail_in -= 4;
z.next_in += 4;
if (!z.avail_in && done_reading) {
goto stop;
}
state++;
break;
case GZSTATE_LEN:
{
uLong origlen;
if (z.avail_in < 4) {
if (!done_reading) {
needmore = 1;
continue;
}
maybe_warnx("truncated input");
goto stop_and_fail;
}
origlen = ((unsigned)z.next_in[0] & 0xff) |
((unsigned)z.next_in[1] & 0xff) << 8 |
((unsigned)z.next_in[2] & 0xff) << 16 |
((unsigned)z.next_in[3] & 0xff) << 24;
if (origlen != out_sub_tot) {
maybe_warnx("invalid compressed"
" data--length error");
goto stop_and_fail;
}
}
z.avail_in -= 4;
z.next_in += 4;
if (error < 0) {
maybe_warnx("decompression error");
goto stop_and_fail;
}
state = GZSTATE_MAGIC0;
break;
}
continue;
stop_and_fail:
out_tot = -1;
stop:
break;
}
if (state > GZSTATE_INIT)
inflateEnd(&z);
free(inbufp);
out1:
free(outbufp);
out2:
if (gsizep)
*gsizep = in_tot;
return (out_tot);
}
/* compress input to output. Return bytes read, -1 on error */
static off_t
gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime)
{
z_stream z;
char *outbufp, *inbufp;
off_t in_tot = 0, out_tot = 0;
ssize_t in_size;
int i, error;
uLong crc;
#ifdef SMALL
static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0,
0, 0, 0, 0,
0, OS_CODE };
#endif
outbufp = malloc(BUFLEN);
inbufp = malloc(BUFLEN);
if (outbufp == NULL || inbufp == NULL) {
maybe_err("malloc failed");
goto out;
}
memset(&z, 0, sizeof z);
z.zalloc = Z_NULL;
z.zfree = Z_NULL;
z.opaque = 0;
#ifdef SMALL
memcpy(outbufp, header, sizeof header);
i = sizeof header;
#else
if (nflag != 0) {
mtime = 0;
origname = "";
}
i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s",
GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED,
*origname ? ORIG_NAME : 0,
mtime & 0xff,
(mtime >> 8) & 0xff,
(mtime >> 16) & 0xff,
(mtime >> 24) & 0xff,
numflag == 1 ? 4 : numflag == 9 ? 2 : 0,
OS_CODE, origname);
if (i >= BUFLEN)
/* this need PATH_MAX > BUFLEN ... */
maybe_err("snprintf");
if (*origname)
i++;
#endif
z.next_out = (unsigned char *)outbufp + i;
z.avail_out = BUFLEN - i;
error = deflateInit2(&z, numflag, Z_DEFLATED,
(-MAX_WBITS), 8, Z_DEFAULT_STRATEGY);
if (error != Z_OK) {
maybe_warnx("deflateInit2 failed");
in_tot = -1;
goto out;
}
crc = crc32(0L, Z_NULL, 0);
for (;;) {
if (z.avail_out == 0) {
if (write(out, outbufp, BUFLEN) != BUFLEN) {
maybe_warn("write");
out_tot = -1;
goto out;
}
out_tot += BUFLEN;
z.next_out = (unsigned char *)outbufp;
z.avail_out = BUFLEN;
}
if (z.avail_in == 0) {
in_size = read(in, inbufp, BUFLEN);
if (in_size < 0) {
maybe_warn("read");
in_tot = -1;
goto out;
}
if (in_size == 0)
break;
crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size);
in_tot += in_size;
z.next_in = (unsigned char *)inbufp;
z.avail_in = in_size;
}
error = deflate(&z, Z_NO_FLUSH);
if (error != Z_OK && error != Z_STREAM_END) {
maybe_warnx("deflate failed");
in_tot = -1;
goto out;
}
}
/* clean up */
for (;;) {
size_t len;
ssize_t w;
error = deflate(&z, Z_FINISH);
if (error != Z_OK && error != Z_STREAM_END) {
maybe_warnx("deflate failed");
in_tot = -1;
goto out;
}
len = (char *)z.next_out - outbufp;
w = write(out, outbufp, len);
if (w == -1 || (size_t)w != len) {
maybe_warn("write");
out_tot = -1;
goto out;
}
out_tot += len;
z.next_out = (unsigned char *)outbufp;
z.avail_out = BUFLEN;
if (error == Z_STREAM_END)
break;
}
if (deflateEnd(&z) != Z_OK) {
maybe_warnx("deflateEnd failed");
in_tot = -1;
goto out;
}
i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c",
(int)crc & 0xff,
(int)(crc >> 8) & 0xff,
(int)(crc >> 16) & 0xff,
(int)(crc >> 24) & 0xff,
(int)in_tot & 0xff,
(int)(in_tot >> 8) & 0xff,
(int)(in_tot >> 16) & 0xff,
(int)(in_tot >> 24) & 0xff);
if (i != 8)
maybe_err("snprintf");
#if 0
if (in_tot > 0xffffffff)
maybe_warn("input file size >= 4GB cannot be saved");
#endif
if (write(out, outbufp, i) != i) {
maybe_warn("write");
in_tot = -1;
} else
out_tot += i;
out:
if (inbufp != NULL)
free(inbufp);
if (outbufp != NULL)
free(outbufp);
if (gsizep)
*gsizep = out_tot;
return in_tot;
}
/* eg:
compressed uncompressed ratio uncompressed_name
354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar
*/
static void
print_list(int fd, off_t out, const char *outfile, time_t ts)
{
static int first = 1;
#ifndef SMALL
static off_t in_tot, out_tot;
uint32_t crc = 0;
#endif
off_t in = 0, rv;
if (first) {
#ifndef SMALL
if (vflag)
printf("method crc date time ");
#endif
if (qflag == 0)
printf(" compressed uncompressed "
"ratio uncompressed_name\n");
}
first = 0;
/* print totals? */
#ifndef SMALL
if (fd == -1) {
in = in_tot;
out = out_tot;
} else
#endif
{
/* read the last 4 bytes - this is the uncompressed size */
rv = lseek(fd, (off_t)(-8), SEEK_END);
if (rv != -1) {
unsigned char buf[8];
uint32_t usize;
rv = read(fd, (char *)buf, sizeof(buf));
if (rv == -1)
maybe_warn("read of uncompressed size");
else if (rv != sizeof(buf))
maybe_warnx("read of uncompressed size");
else {
usize = buf[4] | buf[5] << 8 |
buf[6] << 16 | buf[7] << 24;
in = (off_t)usize;
#ifndef SMALL
crc = buf[0] | buf[1] << 8 |
buf[2] << 16 | buf[3] << 24;
#endif
}
}
}
#ifndef SMALL
if (vflag && fd == -1)
printf(" ");
else if (vflag) {
char *date = ctime(&ts);
/* skip the day, 1/100th second, and year */
date += 4;
date[12] = 0;
printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date);
}
in_tot += in;
out_tot += out;
#endif
printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in);
print_ratio(in, out, stdout);
printf(" %s\n", outfile);
}
static void
handle_stdin(void)
{
unsigned char header1[4];
off_t usize, gsize;
enum filetype method;
ssize_t bytes_read;
#ifndef NO_COMPRESS_SUPPORT
FILE *in;
#endif
#ifndef SMALL
if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) {
maybe_warnx("standard input is a terminal -- ignoring");
return;
}
#endif
if (lflag) {
struct stat isb;
/* XXX could read the whole file, etc. */
if (fstat(STDIN_FILENO, &isb) < 0) {
maybe_warn("fstat");
return;
}
print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime);
return;
}
bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1);
if (bytes_read == -1) {
maybe_warn("can't read stdin");
return;
} else if (bytes_read != sizeof(header1)) {
maybe_warnx("(stdin): unexpected end of file");
return;
}
method = file_gettype(header1);
switch (method) {
default:
#ifndef SMALL
if (fflag == 0) {
maybe_warnx("unknown compression format");
return;
}
usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO);
break;
#endif
case FT_GZIP:
usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO,
(char *)header1, sizeof header1, &gsize, "(stdin)");
break;
#ifndef NO_BZIP2_SUPPORT
case FT_BZIP2:
usize = unbzip2(STDIN_FILENO, STDOUT_FILENO,
(char *)header1, sizeof header1, &gsize);
break;
#endif
#ifndef NO_COMPRESS_SUPPORT
case FT_Z:
if ((in = zdopen(STDIN_FILENO)) == NULL) {
maybe_warnx("zopen of stdin");
return;
}
usize = zuncompress(in, stdout, (char *)header1,
sizeof header1, &gsize);
fclose(in);
break;
#endif
#ifndef NO_PACK_SUPPORT
case FT_PACK:
usize = unpack(STDIN_FILENO, STDOUT_FILENO,
(char *)header1, sizeof header1, &gsize);
break;
#endif
#ifndef NO_XZ_SUPPORT
case FT_XZ:
usize = unxz(STDIN_FILENO, STDOUT_FILENO,
(char *)header1, sizeof header1, &gsize);
break;
#endif
}
#ifndef SMALL
if (vflag && !tflag && usize != -1 && gsize != -1)
print_verbage(NULL, NULL, usize, gsize);
if (vflag && tflag)
print_test("(stdin)", usize != -1);
#endif
}
/* uncompress the given file and remove the original */
static off_t
file_uncompress(char *file, char *outfile, size_t outsize)
{
struct stat isb, osb;
off_t size;
ssize_t rbytes;
unsigned char header1[4];
enum filetype method;
int fd, ofd, zfd = -1;
#ifndef SMALL
ssize_t rv;
time_t timestamp = 0;
char name[PATH_MAX + 1];
#endif
/* gather the old name info */
fd = open(file, O_RDONLY);
if (fd < 0) {
maybe_warn("can't open %s", file);
goto lose;
}
strlcpy(outfile, file, outsize);
if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) {
maybe_warnx("%s: unknown suffix -- ignored", file);
goto lose;
}
rbytes = read(fd, header1, sizeof header1);
if (rbytes != sizeof header1) {
/* we don't want to fail here. */
#ifndef SMALL
if (fflag)
goto lose;
#endif
if (rbytes == -1)
maybe_warn("can't read %s", file);
else
goto unexpected_EOF;
goto lose;
}
method = file_gettype(header1);
#ifndef SMALL
if (fflag == 0 && method == FT_UNKNOWN) {
maybe_warnx("%s: not in gzip format", file);
goto lose;
}
#endif
#ifndef SMALL
if (method == FT_GZIP && Nflag) {
unsigned char ts[4]; /* timestamp */
rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP);
if (rv >= 0 && rv < (ssize_t)(sizeof ts))
goto unexpected_EOF;
if (rv == -1) {
if (!fflag)
maybe_warn("can't read %s", file);
goto lose;
}
timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0];
if (header1[3] & ORIG_NAME) {
rbytes = pread(fd, name, sizeof(name) - 1, GZIP_ORIGNAME);
if (rbytes < 0) {
maybe_warn("can't read %s", file);
goto lose;
}
if (name[0] != '\0') {
char *dp, *nf;
/* Make sure that name is NUL-terminated */
name[rbytes] = '\0';
/* strip saved directory name */
nf = strrchr(name, '/');
if (nf == NULL)
nf = name;
else
nf++;
/* preserve original directory name */
dp = strrchr(file, '/');
if (dp == NULL)
dp = file;
else
dp++;
snprintf(outfile, outsize, "%.*s%.*s",
(int) (dp - file),
file, (int) rbytes, nf);
}
}
}
#endif
lseek(fd, 0, SEEK_SET);
if (cflag == 0 || lflag) {
if (fstat(fd, &isb) != 0)
goto lose;
#ifndef SMALL
if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) {
maybe_warnx("%s has %d other links -- skipping",
file, isb.st_nlink - 1);
goto lose;
}
if (nflag == 0 && timestamp)
isb.st_mtime = timestamp;
if (check_outfile(outfile) == 0)
goto lose;
#endif
}
if (cflag == 0 && lflag == 0) {
zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
if (zfd == STDOUT_FILENO) {
/* We won't close STDOUT_FILENO later... */
zfd = dup(zfd);
close(STDOUT_FILENO);
}
if (zfd == -1) {
maybe_warn("can't open %s", outfile);
goto lose;
}
} else
zfd = STDOUT_FILENO;
switch (method) {
#ifndef NO_BZIP2_SUPPORT
case FT_BZIP2:
/* XXX */
if (lflag) {
maybe_warnx("no -l with bzip2 files");
goto lose;
}
size = unbzip2(fd, zfd, NULL, 0, NULL);
break;
#endif
#ifndef NO_COMPRESS_SUPPORT
case FT_Z: {
FILE *in, *out;
/* XXX */
if (lflag) {
maybe_warnx("no -l with Lempel-Ziv files");
goto lose;
}
if ((in = zdopen(fd)) == NULL) {
maybe_warn("zdopen for read: %s", file);
goto lose;
}
out = fdopen(dup(zfd), "w");
if (out == NULL) {
maybe_warn("fdopen for write: %s", outfile);
fclose(in);
goto lose;
}
size = zuncompress(in, out, NULL, 0, NULL);
/* need to fclose() if ferror() is true... */
if (ferror(in) | fclose(in)) {
maybe_warn("failed infile fclose");
unlink(outfile);
(void)fclose(out);
}
if (fclose(out) != 0) {
maybe_warn("failed outfile fclose");
unlink(outfile);
goto lose;
}
break;
}
#endif
#ifndef NO_PACK_SUPPORT
case FT_PACK:
if (lflag) {
maybe_warnx("no -l with packed files");
goto lose;
}
size = unpack(fd, zfd, NULL, 0, NULL);
break;
#endif
#ifndef NO_XZ_SUPPORT
case FT_XZ:
if (lflag) {
maybe_warnx("no -l with xz files");
goto lose;
}
size = unxz(fd, zfd, NULL, 0, NULL);
break;
#endif
#ifndef SMALL
case FT_UNKNOWN:
if (lflag) {
maybe_warnx("no -l for unknown filetypes");
goto lose;
}
size = cat_fd(NULL, 0, NULL, fd);
break;
#endif
default:
if (lflag) {
print_list(fd, isb.st_size, outfile, isb.st_mtime);
close(fd);
return -1; /* XXX */
}
size = gz_uncompress(fd, zfd, NULL, 0, NULL, file);
break;
}
if (close(fd) != 0)
maybe_warn("couldn't close input");
if (zfd != STDOUT_FILENO && close(zfd) != 0)
maybe_warn("couldn't close output");
if (size == -1) {
if (cflag == 0)
unlink(outfile);
maybe_warnx("%s: uncompress failed", file);
return -1;
}
/* if testing, or we uncompressed to stdout, this is all we need */
#ifndef SMALL
if (tflag)
return size;
#endif
/* if we are uncompressing to stdin, don't remove the file. */
if (cflag)
return size;
/*
* if we create a file...
*/
/*
* if we can't stat the file don't remove the file.
*/
ofd = open(outfile, O_RDWR, 0);
if (ofd == -1) {
maybe_warn("couldn't open (leaving original): %s",
outfile);
return -1;
}
if (fstat(ofd, &osb) != 0) {
maybe_warn("couldn't stat (leaving original): %s",
outfile);
close(ofd);
return -1;
}
if (osb.st_size != size) {
maybe_warnx("stat gave different size: %" PRIdOFF
" != %" PRIdOFF " (leaving original)",
size, osb.st_size);
close(ofd);
unlink(outfile);
return -1;
}
unlink_input(file, &isb);
#ifndef SMALL
copymodes(ofd, &isb, outfile);
#endif
close(ofd);
return size;
unexpected_EOF:
maybe_warnx("%s: unexpected end of file", file);
lose:
if (fd != -1)
close(fd);
if (zfd != -1 && zfd != STDOUT_FILENO)
close(fd);
return -1;
}
/*
* compress the given file: create a corresponding .gz file and remove the
* original.
*/
static off_t
file_compress(char *file, char *outfile, size_t outsize)
{
int in;
int out;
off_t size, insize;
#ifndef SMALL
struct stat isb, osb;
const suffixes_t *suff;
#endif
in = open(file, O_RDONLY);
if (in == -1) {
maybe_warn("can't open %s", file);
return -1;
}
if (cflag == 0) {
#ifndef SMALL
if (fstat(in, &isb) == 0) {
if (isb.st_nlink > 1 && fflag == 0) {
maybe_warnx("%s has %d other link%s -- "
"skipping", file, isb.st_nlink - 1,
isb.st_nlink == 1 ? "" : "s");
close(in);
return -1;
}
}
if (fflag == 0 && (suff = check_suffix(file, 0))
&& suff->zipped[0] != 0) {
maybe_warnx("%s already has %s suffix -- unchanged",
file, suff->zipped);
close(in);
return -1;
}
#endif
/* Add (usually) .gz to filename */
if ((size_t)snprintf(outfile, outsize, "%s%s",
file, suffixes[0].zipped) >= outsize)
memcpy(outfile + outsize - suffixes[0].ziplen - 1,
suffixes[0].zipped, suffixes[0].ziplen + 1);
#ifndef SMALL
if (check_outfile(outfile) == 0) {
close(in);
return -1;
}
#endif
}
if (cflag == 0) {
out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600);
if (out == -1) {
maybe_warn("could not create output: %s", outfile);
fclose(stdin);
return -1;
}
} else
out = STDOUT_FILENO;
insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime);
(void)close(in);
/*
* If there was an error, insize will be -1.
* If we compressed to stdout, just return the size.
* Otherwise stat the file and check it is the correct size.
* We only blow away the file if we can stat the output and it
* has the expected size.
*/
if (cflag != 0)
return insize == -1 ? -1 : size;
#ifndef SMALL
if (fstat(out, &osb) != 0) {
maybe_warn("couldn't stat: %s", outfile);
goto bad_outfile;
}
if (osb.st_size != size) {
maybe_warnx("output file: %s wrong size (%" PRIdOFF
" != %" PRIdOFF "), deleting",
outfile, osb.st_size, size);
goto bad_outfile;
}
copymodes(out, &isb, outfile);
#endif
if (close(out) == -1)
maybe_warn("couldn't close output");
/* output is good, ok to delete input */
unlink_input(file, &isb);
return size;
#ifndef SMALL
bad_outfile:
if (close(out) == -1)
maybe_warn("couldn't close output");
maybe_warnx("leaving original %s", file);
unlink(outfile);
return size;
#endif
}
static off_t
unbzip2(int in, int out, char *pre, size_t prelen, off_t *bytes_in)
{
int ret, end_of_file, cold = 0;
off_t bytes_out = 0;
bz_stream bzs;
static char *inbuf, *outbuf;
if (inbuf == NULL)
inbuf = malloc(BUFLEN);
if (outbuf == NULL)
outbuf = malloc(BUFLEN);
if (inbuf == NULL || outbuf == NULL)
maybe_err("malloc");
bzs.bzalloc = NULL;
bzs.bzfree = NULL;
bzs.opaque = NULL;
end_of_file = 0;
ret = BZ2_bzDecompressInit(&bzs, 0, 0);
if (ret != BZ_OK)
maybe_errx("bzip2 init");
/* Prepend. */
bzs.avail_in = prelen;
bzs.next_in = pre;
if (bytes_in)
*bytes_in = prelen;
while (ret == BZ_OK) {
if (bzs.avail_in == 0 && !end_of_file) {
ssize_t n;
n = read(in, inbuf, BUFLEN);
if (n < 0)
maybe_err("read");
if (n == 0)
end_of_file = 1;
bzs.next_in = inbuf;
bzs.avail_in = n;
if (bytes_in)
*bytes_in += n;
}
bzs.next_out = outbuf;
bzs.avail_out = BUFLEN;
ret = BZ2_bzDecompress(&bzs);
switch (ret) {
case BZ_STREAM_END:
case BZ_OK:
if (ret == BZ_OK && end_of_file) {
/*
* If we hit this after a stream end, consider
* it as the end of the whole file and don't
* bail out.
*/
if (cold == 1)
ret = BZ_STREAM_END;
else
maybe_errx("truncated file");
}
cold = 0;
if (!tflag && bzs.avail_out != BUFLEN) {
ssize_t n;
n = write(out, outbuf, BUFLEN - bzs.avail_out);
if (n < 0)
maybe_err("write");
bytes_out += n;
}
if (ret == BZ_STREAM_END && !end_of_file) {
if (BZ2_bzDecompressEnd(&bzs) != BZ_OK ||
BZ2_bzDecompressInit(&bzs, 0, 0) != BZ_OK)
maybe_errx("bzip2 re-init");
cold = 1;
ret = BZ_OK;
}
break;
case BZ_DATA_ERROR:
maybe_warnx("bzip2 data integrity error");
break;
case BZ_DATA_ERROR_MAGIC:
maybe_warnx("bzip2 magic number error");
break;
case BZ_MEM_ERROR:
maybe_warnx("bzip2 out of memory");
break;
default:
maybe_warnx("unknown bzip2 error: %d", ret);
break;
}
}
if (ret != BZ_STREAM_END || BZ2_bzDecompressEnd(&bzs) != BZ_OK)
return (-1);
return (bytes_out);
}
/* do what is asked for, for the path name */
static void
handle_pathname(char *path)
{
char *opath = path, *s = NULL;
ssize_t len;
int slen;
struct stat sb;
/* check for stdout/stdin */
if (path[0] == '-' && path[1] == '\0') {
if (dflag)
handle_stdin();
else
handle_stdout();
return;
}
#ifdef __APPLE__
if (zcat && COMPAT_MODE("bin/zcat", "Unix2003")) {
char *suffix = strrchr(path, '.');
if (suffix == NULL || strcmp(suffix, Z_SUFFIX) != 0) {
len = strlen(path);
slen = sizeof(Z_SUFFIX) - 1;
s = malloc(len + slen + 1);
memcpy(s, path, len);
memcpy(s + len, Z_SUFFIX, slen + 1);
path = s;
}
}
#endif
retry:
if (stat(path, &sb) != 0 || (fflag == 0 && cflag == 0 &&
lstat(path, &sb) != 0)) {
/* lets try <path>.gz if we're decompressing */
if (dflag && s == NULL && errno == ENOENT) {
len = strlen(path);
slen = suffixes[0].ziplen;
s = malloc(len + slen + 1);
if (s == NULL)
maybe_err("malloc");
memcpy(s, path, len);
memcpy(s + len, suffixes[0].zipped, slen + 1);
path = s;
goto retry;
}
#ifdef __APPLE__
/* Include actual path for clarity. */
maybe_warn("can't stat: %s (%s)", opath, path);
#else
maybe_warn("can't stat: %s", opath);
#endif
goto out;
}
if (S_ISDIR(sb.st_mode)) {
#ifndef SMALL
if (rflag)
handle_dir(path);
else
#endif
maybe_warnx("%s is a directory", path);
goto out;
}
if (S_ISREG(sb.st_mode))
handle_file(path, &sb);
else
maybe_warnx("%s is not a regular file", path);
out:
if (s)
free(s);
}
