int
ar_open(const char *name)
{
struct mtget mb;
if (arfd != -1)
(void)close(arfd);
arfd = -1;
can_unlnk = did_io = io_ok = invld_rec = 0;
artyp = ISREG;
flcnt = 0;
/*
* open based on overall operation mode
*/
switch (act) {
case LIST:
case EXTRACT:
if (name == NULL) {
arfd = STDIN_FILENO;
arcname = stdn;
} else if ((arfd = open(name, EXT_MODE, DMOD)) < 0)
syswarn(0, errno, "Failed open to read on %s", name);
if (arfd != -1 && gzip_program != NULL)
ar_start_gzip(arfd, gzip_program, 0);
break;
case ARCHIVE:
if (name == NULL) {
arfd = STDOUT_FILENO;
arcname = stdo;
} else if ((arfd = open(name, AR_MODE, DMOD)) < 0)
syswarn(0, errno, "Failed open to write on %s", name);
else
can_unlnk = 1;
if (arfd != -1 && gzip_program != NULL)
ar_start_gzip(arfd, gzip_program, 1);
break;
case APPND:
if (name == NULL) {
arfd = STDOUT_FILENO;
arcname = stdo;
} else if ((arfd = open(name, APP_MODE, DMOD)) < 0)
syswarn(0, errno, "Failed open to read/write on %s",
name);
break;
case COPY:
/*
* arfd not used in COPY mode
*/
arcname = none;
lstrval = 1;
return(0);
}
if (arfd < 0)
return(-1);
if (chdname != NULL)
if (chdir(chdname) != 0) {
syswarn(1, errno, "Failed chdir to %s", chdname);
return(-1);
}
/*
* set up is based on device type
*/
if (fstat(arfd, &arsb) < 0) {
syswarn(0, errno, "Failed stat on %s", arcname);
(void)close(arfd);
arfd = -1;
can_unlnk = 0;
return(-1);
}
if (S_ISDIR(arsb.st_mode)) {
paxwarn(0, "Cannot write an archive on top of a directory %s",
arcname);
(void)close(arfd);
arfd = -1;
can_unlnk = 0;
return(-1);
}
if (S_ISCHR(arsb.st_mode))
artyp = ioctl(arfd, MTIOCGET, &mb) ? ISCHR : ISTAPE;
else if (S_ISBLK(arsb.st_mode))
artyp = ISBLK;
else if ((lseek(arfd, (off_t)0L, SEEK_CUR) == -1) && (errno == ESPIPE))
artyp = ISPIPE;
else
artyp = ISREG;
/*
* make sure we beyond any doubt that we only can unlink regular files
* we created
*/
if (artyp != ISREG)
can_unlnk = 0;
/*
* if we are writing, we are done
*/
if (act == ARCHIVE) {
blksz = rdblksz = wrblksz;
lstrval = 1;
return(0);
}
/*
* set default blksz on read. APPNDs writes rdblksz on the last volume
* On all new archive volumes, we shift to wrblksz (if the user
* specified one, otherwise we will continue to use rdblksz). We
* must to set blocksize based on what kind of device the archive is
* stored.
*/
switch(artyp) {
case ISTAPE:
/*
* Tape drives come in at least two flavors. Those that support
* variable sized records and those that have fixed sized
* records. They must be treated differently. For tape drives
* that support variable sized records, we must make large
* reads to make sure we get the entire record, otherwise we
* will just get the first part of the record (up to size we
* asked). Tapes with fixed sized records may or may not return
* multiple records in a single read. We really do not care
* what the physical record size is UNLESS we are going to
* append. (We will need the physical block size to rewrite
* the trailer). Only when we are appending do we go to the
* effort to figure out the true PHYSICAL record size.
*/
blksz = rdblksz = MAXBLK;
break;
case ISPIPE:
case ISBLK:
case ISCHR:
/*
* Blocksize is not a major issue with these devices (but must
* be kept a multiple of 512). If the user specified a write
* block size, we use that to read. Under append, we must
* always keep blksz == rdblksz. Otherwise we go ahead and use
* the device optimal blocksize as (and if) returned by stat
* and if it is within pax specs.
*/
if ((act == APPND) && wrblksz) {
blksz = rdblksz = wrblksz;
break;
}
if ((arsb.st_blksize > 0) && (arsb.st_blksize < MAXBLK) &&
((arsb.st_blksize % BLKMULT) == 0))
rdblksz = arsb.st_blksize;
else
rdblksz = DEVBLK;
/*
* For performance go for large reads when we can without harm
*/
if ((act == APPND) || (artyp == ISCHR))
blksz = rdblksz;
else
blksz = MAXBLK;
break;
case ISREG:
/*
* if the user specified wrblksz works, use it. Under appends
* we must always keep blksz == rdblksz
*/
if ((act == APPND) && wrblksz && ((arsb.st_size%wrblksz)==0)){
blksz = rdblksz = wrblksz;
break;
}
/*
* See if we can find the blocking factor from the file size
*/
for (rdblksz = MAXBLK; rdblksz > 0; rdblksz -= BLKMULT)
if ((arsb.st_size % rdblksz) == 0)
break;
/*
* When we cannot find a match, we may have a flawed archive.
*/
if (rdblksz <= 0)
rdblksz = FILEBLK;
/*
* for performance go for large reads when we can
*/
if (act == APPND)
blksz = rdblksz;
else
blksz = MAXBLK;
break;
default:
/*
* should never happen, worse case, slow...
*/
blksz = rdblksz = BLKMULT;
break;
}
lstrval = 1;
return(0);
}
static int
get_phys(void)
{
int padsz = 0;
int res;
int phyblk;
struct mtop mb;
char scbuf[MAXBLK];
/*
* move to the file mark, and then back up one record and read it.
* this should tell us the physical record size the tape is using.
*/
if (lstrval == 1) {
/*
* we know we are at file mark when we get back a 0 from
* read()
*/
while ((res = read(arfd, scbuf, sizeof(scbuf))) > 0)
padsz += res;
if (res < 0) {
syswarn(1, errno, "Unable to locate tape filemark.");
return(-1);
}
}
/*
* move backwards over the file mark so we are at the end of the
* last record.
*/
mb.mt_op = MTBSF;
mb.mt_count = 1;
if (ioctl(arfd, MTIOCTOP, &mb) < 0) {
syswarn(1, errno, "Unable to backspace over tape filemark.");
return(-1);
}
/*
* move backwards so we are in front of the last record and read it to
* get physical tape blocksize.
*/
mb.mt_op = MTBSR;
mb.mt_count = 1;
if (ioctl(arfd, MTIOCTOP, &mb) < 0) {
syswarn(1, errno, "Unable to backspace over last tape block.");
return(-1);
}
if ((phyblk = read(arfd, scbuf, sizeof(scbuf))) <= 0) {
syswarn(1, errno, "Cannot determine archive tape blocksize.");
return(-1);
}
/*
* read forward to the file mark, then back up in front of the filemark
* (this is a bit paranoid, but should be safe to do).
*/
while ((res = read(arfd, scbuf, sizeof(scbuf))) > 0)
;
if (res < 0) {
syswarn(1, errno, "Unable to locate tape filemark.");
return(-1);
}
mb.mt_op = MTBSF;
mb.mt_count = 1;
if (ioctl(arfd, MTIOCTOP, &mb) < 0) {
syswarn(1, errno, "Unable to backspace over tape filemark.");
return(-1);
}
/*
* set lstrval so we know that the filemark has not been seen
*/
lstrval = 1;
/*
* return if there was no padding
*/
if (padsz == 0)
return(phyblk);
/*
* make sure we can move backwards over the padding. (this should
* never fail).
*/
if (padsz % phyblk) {
paxwarn(1, "Tape drive unable to backspace requested amount");
return(-1);
}
/*
* move backwards over the padding so the head is where it was when
* we were first called (if required).
*/
mb.mt_op = MTBSR;
mb.mt_count = padsz/phyblk;
if (ioctl(arfd, MTIOCTOP, &mb) < 0) {
syswarn(1,errno,"Unable to backspace tape over %d pad blocks",
mb.mt_count);
return(-1);
}
return(phyblk);
}
int
ar_rdsync(void)
{
long fsbz;
off_t cpos;
off_t mpos;
struct mtop mb;
/*
* Fail resync attempts at user request (done) or this is going to be
* an update/append to an existing archive. If last i/o hit media end,
* we need to go to the next volume not try a resync.
*/
if ((done > 0) || (lstrval == 0))
return(-1);
if ((act == APPND) || (act == ARCHIVE)) {
paxwarn(1, "Cannot allow updates to an archive with flaws.");
return(-1);
}
if (io_ok)
did_io = 1;
switch(artyp) {
case ISTAPE:
/*
* if the last i/o was a successful data transfer, we assume
* the fault is just a bad record on the tape that we are now
* past. If we did not get any data since the last resync try
* to move the tape forward one PHYSICAL record past any
* damaged tape section. Some tape drives are stubborn and need
* to be pushed.
*/
if (io_ok) {
io_ok = 0;
lstrval = 1;
break;
}
mb.mt_op = MTFSR;
mb.mt_count = 1;
if (ioctl(arfd, MTIOCTOP, &mb) < 0)
break;
lstrval = 1;
break;
case ISREG:
case ISCHR:
case ISBLK:
/*
* try to step over the bad part of the device.
*/
io_ok = 0;
if (((fsbz = arsb.st_blksize) <= 0) || (artyp != ISREG))
fsbz = BLKMULT;
if ((cpos = lseek(arfd, (off_t)0L, SEEK_CUR)) < 0)
break;
mpos = fsbz - (cpos % (off_t)fsbz);
if (lseek(arfd, mpos, SEEK_CUR) < 0)
break;
lstrval = 1;
break;
case ISPIPE:
default:
/*
* cannot recover on these archive device types
*/
io_ok = 0;
break;
}
if (lstrval <= 0) {
paxwarn(1, "Unable to recover from an archive read failure.");
return(-1);
}
paxwarn(0, "Attempting to recover from an archive read failure.");
return(0);
}
int
ar_rev(off_t sksz)
{
off_t cpos;
struct mtop mb;
int phyblk;
/*
* make sure we do not have try to reverse on a flawed archive
*/
if (lstrval < 0)
return(lstrval);
switch(artyp) {
case ISPIPE:
if (sksz <= 0)
break;
/*
* cannot go backwards on these critters
*/
paxwarn(1, "Reverse positioning on pipes is not supported.");
lstrval = -1;
return(-1);
case ISREG:
case ISBLK:
case ISCHR:
default:
if (sksz <= 0)
break;
/*
* For things other than files, backwards movement has a very
* high probability of failure as we really do not know the
* true attributes of the device we are talking to (the device
* may not even have the ability to lseek() in any direction).
* First we figure out where we are in the archive.
*/
if ((cpos = lseek(arfd, (off_t)0L, SEEK_CUR)) < 0) {
syswarn(1, errno,
"Unable to obtain current archive byte offset");
lstrval = -1;
return(-1);
}
/*
* we may try to go backwards past the start when the archive
* is only a single record. If this happens and we are on a
* multi volume archive, we need to go to the end of the
* previous volume and continue our movement backwards from
* there.
*/
if ((cpos -= sksz) < (off_t)0L) {
if (arvol > 1) {
/*
* this should never happen
*/
paxwarn(1,"Reverse position on previous volume.");
lstrval = -1;
return(-1);
}
cpos = (off_t)0L;
}
if (lseek(arfd, cpos, SEEK_SET) < 0) {
syswarn(1, errno, "Unable to seek archive backwards");
lstrval = -1;
return(-1);
}
break;
case ISTAPE:
/*
* Calculate and move the proper number of PHYSICAL tape
* blocks. If the sksz is not an even multiple of the physical
* tape size, we cannot do the move (this should never happen).
* (We also cannot handler trailers spread over two vols).
* get_phys() also makes sure we are in front of the filemark.
*/
if ((phyblk = get_phys()) <= 0) {
lstrval = -1;
return(-1);
}
/*
* make sure future tape reads only go by physical tape block
* size (set rdblksz to the real size).
*/
rdblksz = phyblk;
/*
* if no movement is required, just return (we must be after
* get_phys() so the physical blocksize is properly set)
*/
if (sksz <= 0)
break;
/*
* ok we have to move. Make sure the tape drive can do it.
*/
if (sksz % phyblk) {
paxwarn(1,
"Tape drive unable to backspace requested amount");
lstrval = -1;
return(-1);
}
/*
* move backwards the requested number of bytes
*/
mb.mt_op = MTBSR;
mb.mt_count = sksz/phyblk;
if (ioctl(arfd, MTIOCTOP, &mb) < 0) {
syswarn(1,errno, "Unable to backspace tape %d blocks.",
mb.mt_count);
lstrval = -1;
return(-1);
}
break;
}
lstrval = 1;
return(0);
}
int
ar_write(char *buf, int bsz)
{
int res;
off_t cpos;
/*
* do not allow pax to create a "bad" archive. Once a write fails on
* an archive volume prevent further writes to it.
*/
if (lstrval <= 0)
return(lstrval);
if ((res = write(arfd, buf, bsz)) == bsz) {
wr_trail = 1;
io_ok = 1;
return(bsz);
}
/*
* write broke, see what we can do with it. We try to send any partial
* writes that may violate pax spec to the next archive volume.
*/
if (res < 0)
lstrval = res;
else
lstrval = 0;
switch (artyp) {
case ISREG:
if ((res > 0) && (res % BLKMULT)) {
/*
* try to fix up partial writes which are not BLKMULT
* in size by forcing the runt record to next archive
* volume
*/
if ((cpos = lseek(arfd, (off_t)0L, SEEK_CUR)) < 0)
break;
cpos -= (off_t)res;
if (ftruncate(arfd, cpos) < 0)
break;
res = lstrval = 0;
break;
}
if (res >= 0)
break;
/*
* if file is out of space, handle it like a return of 0
*/
if ((errno == ENOSPC) || (errno == EFBIG) || (errno == EDQUOT))
res = lstrval = 0;
break;
case ISTAPE:
case ISCHR:
case ISBLK:
if (res >= 0)
break;
if (errno == EACCES) {
paxwarn(0, "Write failed, archive is write protected.");
res = lstrval = 0;
return(0);
}
/*
* see if we reached the end of media, if so force a change to
* the next volume
*/
if ((errno == ENOSPC) || (errno == EIO) || (errno == ENXIO))
res = lstrval = 0;
break;
case ISPIPE:
default:
/*
* we cannot fix errors to these devices
*/
break;
}
/*
* Better tell the user the bad news...
* if this is a block aligned archive format, we may have a bad archive
* if the format wants the header to start at a BLKMULT boundary. While
* we can deal with the mis-aligned data, it violates spec and other
* archive readers will likely fail. If the format is not block
* aligned, the user may be lucky (and the archive is ok).
*/
if (res >= 0) {
if (res > 0)
wr_trail = 1;
io_ok = 1;
}
/*
* If we were trying to rewrite the trailer and it didn't work, we
* must quit right away.
*/
if (!wr_trail && (res <= 0)) {
paxwarn(1,"Unable to append, trailer re-write failed. Quitting.");
return(res);
}
if (res == 0)
paxwarn(0, "End of archive volume %d reached", arvol);
else if (res < 0)
syswarn(1, errno, "Failed write to archive volume: %d", arvol);
else if (!frmt->blkalgn || ((res % frmt->blkalgn) == 0))
paxwarn(0,"WARNING: partial archive write. Archive MAY BE FLAWED");
else
paxwarn(1,"WARNING: partial archive write. Archive IS FLAWED");
return(res);
}
int
ar_read(char *buf, int cnt)
{
int res = 0;
/*
* if last i/o was in error, no more reads until reset or new volume
*/
if (lstrval <= 0)
return(lstrval);
/*
* how we read must be based on device type
*/
switch (artyp) {
case ISTAPE:
if ((res = read(arfd, buf, cnt)) > 0) {
/*
* CAUTION: tape systems may not always return the same
* sized records so we leave blksz == MAXBLK. The
* physical record size that a tape drive supports is
* very hard to determine in a uniform and portable
* manner.
*/
io_ok = 1;
if (res != rdblksz) {
/*
* Record size changed. If this is happens on
* any record after the first, we probably have
* a tape drive which has a fixed record size
* we are getting multiple records in a single
* read). Watch out for record blocking that
* violates pax spec (must be a multiple of
* BLKMULT).
*/
rdblksz = res;
if (rdblksz % BLKMULT)
invld_rec = 1;
}
return(res);
}
break;
case ISREG:
case ISBLK:
case ISCHR:
case ISPIPE:
default:
/*
* Files are so easy to deal with. These other things cannot
* be trusted at all. So when we are dealing with character
* devices and pipes we just take what they have ready for us
* and return. Trying to do anything else with them runs the
* risk of failure.
*/
if ((res = read(arfd, buf, cnt)) > 0) {
io_ok = 1;
return(res);
}
break;
}
/*
* We are in trouble at this point, something is broken...
*/
lstrval = res;
if (res < 0)
syswarn(1, errno, "Failed read on archive volume %d", arvol);
else
paxwarn(0, "End of archive volume %d reached", arvol);
return(res);
}
int
ar_next(void)
{
static char *arcbuf;
char buf[PAXPATHLEN+2];
sigset_t o_mask;
/*
* WE MUST CLOSE THE DEVICE. A lot of devices must see last close, (so
* things like writing EOF etc will be done) (Watch out ar_close() can
* also be called via a signal handler, so we must prevent a race.
*/
if (sigprocmask(SIG_BLOCK, &s_mask, &o_mask) < 0)
syswarn(0, errno, "Unable to set signal mask");
ar_close();
if (sigprocmask(SIG_SETMASK, &o_mask, NULL) < 0)
syswarn(0, errno, "Unable to restore signal mask");
if (done || !wr_trail || strcmp(NM_TAR, argv0) == 0)
return(-1);
tty_prnt("\nATTENTION! %s archive volume change required.\n", argv0);
/*
* if i/o is on stdin or stdout, we cannot reopen it (we do not know
* the name), the user will be forced to type it in.
*/
if (strcmp(arcname, stdo) && strcmp(arcname, stdn) && (artyp != ISREG)
&& (artyp != ISPIPE)) {
if (artyp == ISTAPE) {
tty_prnt("%s ready for archive tape volume: %d\n",
arcname, arvol);
tty_prnt("Load the NEXT TAPE on the tape drive");
} else {
tty_prnt("%s ready for archive volume: %d\n",
arcname, arvol);
tty_prnt("Load the NEXT STORAGE MEDIA (if required)");
}
if ((act == ARCHIVE) || (act == APPND))
tty_prnt(" and make sure it is WRITE ENABLED.\n");
else
tty_prnt("\n");
for(;;) {
tty_prnt("Type \"y\" to continue, \".\" to quit %s,",
argv0);
tty_prnt(" or \"s\" to switch to new device.\nIf you");
tty_prnt(" cannot change storage media, type \"s\"\n");
tty_prnt("Is the device ready and online? > ");
if ((tty_read(buf,sizeof(buf))<0) || !strcmp(buf,".")){
done = 1;
lstrval = -1;
tty_prnt("Quitting %s!\n", argv0);
vfpart = 0;
return(-1);
}
if ((buf[0] == '\0') || (buf[1] != '\0')) {
tty_prnt("%s unknown command, try again\n",buf);
continue;
}
switch (buf[0]) {
case 'y':
case 'Y':
/*
* we are to continue with the same device
*/
if (ar_open(arcname) >= 0)
return(0);
tty_prnt("Cannot re-open %s, try again\n",
arcname);
continue;
case 's':
case 'S':
/*
* user wants to open a different device
*/
tty_prnt("Switching to a different archive\n");
break;
default:
tty_prnt("%s unknown command, try again\n",buf);
continue;
}
break;
}
} else
tty_prnt("Ready for archive volume: %d\n", arvol);
/*
* have to go to a different archive
*/
for (;;) {
tty_prnt("Input archive name or \".\" to quit %s.\n", argv0);
tty_prnt("Archive name > ");
if ((tty_read(buf, sizeof(buf)) < 0) || !strcmp(buf, ".")) {
done = 1;
lstrval = -1;
tty_prnt("Quitting %s!\n", argv0);
vfpart = 0;
return(-1);
}
if (buf[0] == '\0') {
tty_prnt("Empty file name, try again\n");
continue;
}
if (!strcmp(buf, "..")) {
tty_prnt("Illegal file name: .. try again\n");
continue;
}
if (strlen(buf) > PAXPATHLEN) {
tty_prnt("File name too long, try again\n");
continue;
}
/*
* try to open new archive
*/
if (ar_open(buf) >= 0) {
free(arcbuf);
if ((arcbuf = strdup(buf)) == NULL) {
done = 1;
lstrval = -1;
paxwarn(0, "Cannot save archive name.");
return(-1);
}
arcname = arcbuf;
break;
}
tty_prnt("Cannot open %s, try again\n", buf);
continue;
}
return(0);
}
static int
gen_init(void)
{
struct rlimit reslimit;
struct sigaction n_hand;
struct sigaction o_hand;
/*
* Really needed to handle large archives. We can run out of memory for
* internal tables really fast when we have a whole lot of files...
*/
if (getrlimit(RLIMIT_DATA , &reslimit) == 0){
reslimit.rlim_cur = reslimit.rlim_max;
(void)setrlimit(RLIMIT_DATA , &reslimit);
}
/*
* should file size limits be waived? if the os limits us, this is
* needed if we want to write a large archive
*/
if (getrlimit(RLIMIT_FSIZE , &reslimit) == 0){
reslimit.rlim_cur = reslimit.rlim_max;
(void)setrlimit(RLIMIT_FSIZE , &reslimit);
}
/*
* increase the size the stack can grow to
*/
if (getrlimit(RLIMIT_STACK , &reslimit) == 0){
reslimit.rlim_cur = reslimit.rlim_max;
(void)setrlimit(RLIMIT_STACK , &reslimit);
}
/*
* not really needed, but doesn't hurt
*/
if (getrlimit(RLIMIT_RSS , &reslimit) == 0){
reslimit.rlim_cur = reslimit.rlim_max;
(void)setrlimit(RLIMIT_RSS , &reslimit);
}
/*
* signal handling to reset stored directory times and modes. Since
* we deal with broken pipes via failed writes we ignore it. We also
* deal with any file size limit thorough failed writes. Cpu time
* limits are caught and a cleanup is forced.
*/
if ((sigemptyset(&s_mask) < 0) || (sigaddset(&s_mask, SIGTERM) < 0) ||
(sigaddset(&s_mask,SIGINT) < 0)||(sigaddset(&s_mask,SIGHUP) < 0) ||
(sigaddset(&s_mask,SIGPIPE) < 0)||(sigaddset(&s_mask,SIGQUIT)<0) ||
(sigaddset(&s_mask,SIGXCPU) < 0)||(sigaddset(&s_mask,SIGXFSZ)<0)) {
paxwarn(1, "Unable to set up signal mask");
return(-1);
}
memset(&n_hand, 0, sizeof n_hand);
n_hand.sa_mask = s_mask;
n_hand.sa_flags = 0;
n_hand.sa_handler = sig_cleanup;
if ((sigaction(SIGHUP, &n_hand, &o_hand) < 0) &&
(o_hand.sa_handler == SIG_IGN) &&
(sigaction(SIGHUP, &o_hand, &o_hand) < 0))
goto out;
if ((sigaction(SIGTERM, &n_hand, &o_hand) < 0) &&
(o_hand.sa_handler == SIG_IGN) &&
(sigaction(SIGTERM, &o_hand, &o_hand) < 0))
goto out;
if ((sigaction(SIGINT, &n_hand, &o_hand) < 0) &&
(o_hand.sa_handler == SIG_IGN) &&
(sigaction(SIGINT, &o_hand, &o_hand) < 0))
goto out;
if ((sigaction(SIGQUIT, &n_hand, &o_hand) < 0) &&
(o_hand.sa_handler == SIG_IGN) &&
(sigaction(SIGQUIT, &o_hand, &o_hand) < 0))
goto out;
if ((sigaction(SIGXCPU, &n_hand, &o_hand) < 0) &&
(o_hand.sa_handler == SIG_IGN) &&
(sigaction(SIGXCPU, &o_hand, &o_hand) < 0))
goto out;
n_hand.sa_handler = SIG_IGN;
if ((sigaction(SIGPIPE, &n_hand, &o_hand) < 0) ||
(sigaction(SIGXFSZ, &n_hand, &o_hand) < 0))
goto out;
return(0);
out:
syswarn(1, errno, "Unable to set up signal handler");
return(-1);
}
int
main(int argc, char *argv[])
{
const char *tmpdir;
size_t tdlen;
(void) setlocale(LC_ALL, "");
listf = stderr;
/*
* Keep a reference to cwd, so we can always come back home.
*/
cwdfd = open(".", O_RDONLY);
if (cwdfd < 0) {
syswarn(0, errno, "Can't open current working directory.");
return(exit_val);
}
/*
* Where should we put temporary files?
*/
if ((tmpdir = getenv("TMPDIR")) == NULL || *tmpdir == '\0')
tmpdir = _PATH_TMP;
tdlen = strlen(tmpdir);
while(tdlen > 0 && tmpdir[tdlen - 1] == '/')
tdlen--;
tempfile = malloc(tdlen + 1 + sizeof(_TFILE_BASE));
if (tempfile == NULL) {
paxwarn(1, "Cannot allocate memory for temp file name.");
return(exit_val);
}
if (tdlen)
memcpy(tempfile, tmpdir, tdlen);
tempbase = tempfile + tdlen;
*tempbase++ = '/';
/*
* parse options, determine operational mode, general init
*/
options(argc, argv);
if ((gen_init() < 0) || (tty_init() < 0))
return(exit_val);
/*
* select a primary operation mode
*/
switch(act) {
case EXTRACT:
extract();
break;
case ARCHIVE:
archive();
break;
case APPND:
if (gzip_program != NULL)
err(1, "can not gzip while appending");
append();
break;
case COPY:
copy();
break;
default:
case LIST:
list();
break;
}
return(exit_val);
}