void FAST_FUNC bb_copyfd_exact_size(int fd1, int fd2, off_t size)
{
off_t sz = bb_copyfd_size(fd1, fd2, size);
if (sz == size)
return;
if (sz != -1)
bb_error_msg_and_die("short read");
/* if sz == -1, bb_copyfd_XX already complained */
xfunc_die();
}
static int ftp_recieve(ftp_host_info_t *server, FILE *control_stream,
const char *local_path, char *server_path)
{
char buf[512];
off_t filesize = 0;
int fd_data;
int fd_local = -1;
off_t beg_range = 0;
/* Connect to the data socket */
if (ftpcmd("PASV", NULL, control_stream, buf) != 227) {
bb_error_msg_and_die("PASV error: %s", buf + 4);
}
fd_data = xconnect_ftpdata(server, buf);
if (ftpcmd("SIZE ", server_path, control_stream, buf) == 213) {
unsigned long value=filesize;
if (safe_strtoul(buf + 4, &value))
bb_error_msg_and_die("SIZE error: %s", buf + 4);
filesize = value;
}
if ((local_path[0] == '-') && (local_path[1] == '\0')) {
fd_local = STDOUT_FILENO;
do_continue = 0;
}
if (do_continue) {
struct stat sbuf;
if (lstat(local_path, &sbuf) < 0) {
bb_perror_msg_and_die("fstat()");
}
if (sbuf.st_size > 0) {
beg_range = sbuf.st_size;
} else {
do_continue = 0;
}
}
if (do_continue) {
sprintf(buf, "REST %ld", (long)beg_range);
if (ftpcmd(buf, NULL, control_stream, buf) != 350) {
do_continue = 0;
} else {
filesize -= beg_range;
}
}
if (ftpcmd("RETR ", server_path, control_stream, buf) > 150) {
bb_error_msg_and_die("RETR error: %s", buf + 4);
}
/* only make a local file if we know that one exists on the remote server */
if (fd_local == -1) {
if (do_continue) {
fd_local = bb_xopen(local_path, O_APPEND | O_WRONLY);
} else {
fd_local = bb_xopen(local_path, O_CREAT | O_TRUNC | O_WRONLY);
}
}
/* Copy the file */
if (bb_copyfd_size(fd_data, fd_local, filesize) == -1) {
exit(EXIT_FAILURE);
}
/* close it all down */
close(fd_data);
if (ftpcmd(NULL, NULL, control_stream, buf) != 226) {
bb_error_msg_and_die("ftp error: %s", buf + 4);
}
ftpcmd("QUIT", NULL, control_stream, buf);
return(EXIT_SUCCESS);
}
void data_extract_all(archive_handle_t *archive_handle)
{
file_header_t *file_header = archive_handle->file_header;
int dst_fd;
int res;
if (archive_handle->flags & ARCHIVE_CREATE_LEADING_DIRS) {
char *name = bb_xstrdup(file_header->name);
bb_make_directory (dirname(name), -1, FILEUTILS_RECUR);
free(name);
}
/* Check if the file already exists */
if (archive_handle->flags & ARCHIVE_EXTRACT_UNCONDITIONAL) {
/* Remove the existing entry if it exists */
if (((file_header->mode & S_IFMT) != S_IFDIR) && (unlink(file_header->name) == -1) && (errno != ENOENT)) {
bb_perror_msg_and_die("Couldnt remove old file");
}
}
else if (archive_handle->flags & ARCHIVE_EXTRACT_NEWER) {
/* Remove the existing entry if its older than the extracted entry */
struct stat statbuf;
if (lstat(file_header->name, &statbuf) == -1) {
if (errno != ENOENT) {
bb_perror_msg_and_die("Couldnt stat old file");
}
}
else if (statbuf.st_mtime <= file_header->mtime) {
if (!(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
bb_error_msg("%s not created: newer or same age file exists", file_header->name);
}
data_skip(archive_handle);
return;
}
else if ((unlink(file_header->name) == -1) && (errno != EISDIR)) {
bb_perror_msg_and_die("Couldnt remove old file %s", file_header->name);
}
}
/* Handle hard links separately
* We identified hard links as regular files of size 0 with a symlink */
if (S_ISREG(file_header->mode) && (file_header->link_name) && (file_header->size == 0)) {
/* hard link */
res = link(file_header->link_name, file_header->name);
if ((res == -1) && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
bb_perror_msg("Couldnt create hard link");
}
} else {
/* Create the filesystem entry */
switch(file_header->mode & S_IFMT) {
case S_IFREG: {
/* Regular file */
dst_fd = bb_xopen(file_header->name, O_WRONLY | O_CREAT | O_EXCL);
bb_copyfd_size(archive_handle->src_fd, dst_fd, file_header->size);
close(dst_fd);
break;
}
case S_IFDIR:
res = mkdir(file_header->name, file_header->mode);
if ((errno != EISDIR) && (res == -1) && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
bb_perror_msg("extract_archive: %s", file_header->name);
}
break;
case S_IFLNK:
/* Symlink */
res = symlink(file_header->link_name, file_header->name);
if ((res == -1) && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
bb_perror_msg("Cannot create symlink from %s to '%s'", file_header->name, file_header->link_name);
}
break;
case S_IFSOCK:
case S_IFBLK:
case S_IFCHR:
case S_IFIFO:
res = mknod(file_header->name, file_header->mode, file_header->device);
if ((res == -1) && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
bb_perror_msg("Cannot create node %s", file_header->name);
}
break;
default:
bb_error_msg_and_die("Unrecognised file type");
}
}
if (!(archive_handle->flags & ARCHIVE_NOPRESERVE_OWN)) {
lchown(file_header->name, file_header->uid, file_header->gid);
}
if (!(archive_handle->flags & ARCHIVE_NOPRESERVE_PERM) &&
(file_header->mode & S_IFMT) != S_IFLNK)
{
chmod(file_header->name, file_header->mode);
}
if (archive_handle->flags & ARCHIVE_PRESERVE_DATE && !S_ISLNK(file_header->mode)) {
struct utimbuf t;
t.actime = t.modtime = file_header->mtime;
utime(file_header->name, &t);
}
}
int lpd_main(int argc UNUSED_PARAM, char *argv[])
{
int spooling = spooling; // for compiler
char *s, *queue;
char *filenames[2];
// goto spool directory
if (*++argv)
xchdir(*argv++);
// error messages of xfuncs will be sent over network
xdup2(STDOUT_FILENO, STDERR_FILENO);
// nullify ctrl/data filenames
memset(filenames, 0, sizeof(filenames));
// read command
s = queue = xmalloc_read_stdin();
// we understand only "receive job" command
if (2 != *queue) {
unsupported_cmd:
printf("Command %02x %s\n",
(unsigned char)s[0], "is not supported");
goto err_exit;
}
// parse command: "2 | QUEUE_NAME | '\n'"
queue++;
// protect against "/../" attacks
// *strchrnul(queue, '\n') = '\0'; - redundant, sane() will do
if (!*sane(queue))
return EXIT_FAILURE;
// queue is a directory -> chdir to it and enter spooling mode
spooling = chdir(queue) + 1; // 0: cannot chdir, 1: done
// we don't free(s), we might need "queue" var later
while (1) {
char *fname;
int fd;
// int is easier than ssize_t: can use xatoi_u,
// and can correctly display error returns (-1)
int expected_len, real_len;
// signal OK
safe_write(STDOUT_FILENO, "", 1);
// get subcommand
// valid s must be of form: "SUBCMD | LEN | space | FNAME"
// N.B. we bail out on any error
s = xmalloc_read_stdin();
if (!s) { // (probably) EOF
char *p, *q, var[2];
// non-spooling mode or no spool helper specified
if (!spooling || !*argv)
return EXIT_SUCCESS; // the only non-error exit
// spooling mode but we didn't see both ctrlfile & datafile
if (spooling != 7)
goto err_exit; // reject job
// spooling mode and spool helper specified -> exec spool helper
// (we exit 127 if helper cannot be executed)
var[1] = '\0';
// read and delete ctrlfile
q = xmalloc_xopen_read_close(filenames[0], NULL);
unlink(filenames[0]);
// provide datafile name
// we can use leaky setenv since we are about to exec or exit
xsetenv("DATAFILE", filenames[1]);
// parse control file by "\n"
while ((p = strchr(q, '\n')) != NULL && isalpha(*q)) {
*p++ = '\0';
// q is a line of <SYM><VALUE>,
// we are setting environment string <SYM>=<VALUE>.
// Ignoring "l<datafile>", exporting others:
if (*q != 'l') {
var[0] = *q++;
xsetenv(var, q);
}
q = p; // next line
}
// helper should not talk over network.
// this call reopens stdio fds to "/dev/null"
// (no daemonization is done)
bb_daemonize_or_rexec(DAEMON_DEVNULL_STDIO | DAEMON_ONLY_SANITIZE, NULL);
BB_EXECVP(*argv, argv);
exit(127);
}
// validate input.
// we understand only "control file" or "data file" cmds
if (2 != s[0] && 3 != s[0])
goto unsupported_cmd;
if (spooling & (1 << (s[0]-1))) {
printf("Duplicated subcommand\n");
goto err_exit;
}
// get filename
*strchrnul(s, '\n') = '\0';
fname = strchr(s, ' ');
if (!fname) {
// bad_fname:
printf("No or bad filename\n");
goto err_exit;
}
*fname++ = '\0';
// // s[0]==2: ctrlfile, must start with 'c'
// // s[0]==3: datafile, must start with 'd'
// if (fname[0] != s[0] + ('c'-2))
// goto bad_fname;
// get length
expected_len = bb_strtou(s + 1, NULL, 10);
if (errno || expected_len < 0) {
printf("Bad length\n");
goto err_exit;
}
if (2 == s[0] && expected_len > 16 * 1024) {
// SECURITY:
// ctrlfile can't be big (we want to read it back later!)
printf("File is too big\n");
goto err_exit;
}
// open the file
if (spooling) {
// spooling mode: dump both files
// job in flight has mode 0200 "only writable"
sane(fname);
fd = open3_or_warn(fname, O_CREAT | O_WRONLY | O_TRUNC | O_EXCL, 0200);
if (fd < 0)
goto err_exit;
filenames[s[0] - 2] = xstrdup(fname);
} else {
// non-spooling mode:
// 2: control file (ignoring), 3: data file
fd = -1;
if (3 == s[0])
fd = xopen(queue, O_RDWR | O_APPEND);
}
// signal OK
safe_write(STDOUT_FILENO, "", 1);
// copy the file
real_len = bb_copyfd_size(STDIN_FILENO, fd, expected_len);
if (real_len != expected_len) {
printf("Expected %d but got %d bytes\n",
expected_len, real_len);
goto err_exit;
}
// get EOF indicator, see whether it is NUL (ok)
// (and don't trash s[0]!)
if (safe_read(STDIN_FILENO, &s[1], 1) != 1 || s[1] != 0) {
// don't send error msg to peer - it obviously
// doesn't follow the protocol, so probably
// it can't understand us either
goto err_exit;
}
if (spooling) {
// chmod completely downloaded file as "readable+writable"
fchmod(fd, 0600);
// accumulate dump state
// N.B. after all files are dumped spooling should be 1+2+4==7
spooling |= (1 << (s[0]-1)); // bit 1: ctrlfile; bit 2: datafile
}
free(s);
close(fd); // NB: can do close(-1). Who cares?
// NB: don't do "signal OK" write here, it will be done
// at the top of the loop
} // while (1)
err_exit:
// don't keep corrupted files
if (spooling) {
#define i spooling
for (i = 2; --i >= 0; )
if (filenames[i])
unlink(filenames[i]);
}
return EXIT_FAILURE;
}
static int ftp_receive(ftp_host_info_t *server, FILE *control_stream, const char *local_path, char *server_path)
{
char buf[512];
/* I think 'filesize' usage here is bogus. Let's see... */
//off_t filesize = -1;
#define filesize ((off_t)-1)
int fd_data;
int fd_local = -1;
off_t beg_range = 0;
/* Connect to the data socket */
if (ftpcmd("PASV", NULL, control_stream, buf) != 227) {
ftp_die("PASV", buf);
}
fd_data = xconnect_ftpdata(server, buf);
if (ftpcmd("SIZE", server_path, control_stream, buf) == 213) {
//filesize = BB_STRTOOFF(buf + 4, NULL, 10);
//if (errno || filesize < 0)
// ftp_die("SIZE", buf);
} else {
do_continue = 0;
}
if (LONE_DASH(local_path)) {
fd_local = STDOUT_FILENO;
do_continue = 0;
}
if (do_continue) {
struct stat sbuf;
if (lstat(local_path, &sbuf) < 0) {
//bb_error_msg_and_die("lstat");
printf("lstat error.");
exit - 1;
}
if (sbuf.st_size > 0) {
beg_range = sbuf.st_size;
} else {
do_continue = 0;
}
}
if (do_continue) {
sprintf(buf, "REST %""1""d", (int)beg_range);
if (ftpcmd(buf, NULL, control_stream, buf) != 350) {
do_continue = 0;
} else {
//if (filesize != -1)
// filesize -= beg_range;
}
}
if (ftpcmd("RETR", server_path, control_stream, buf) > 150) {
ftp_die("RETR", buf);
}
/* only make a local file if we know that one exists on the remote server */
if (fd_local == -1) {
if (do_continue) {
fd_local = xopen(local_path, O_APPEND | O_WRONLY, 0666);
} else {
fd_local = xopen(local_path, O_CREAT | O_TRUNC | O_WRONLY, 0666);
}
}
/* Copy the file */
if (filesize != -1) {
if (bb_copyfd_size(fd_data, fd_local, filesize) == -1)
return EXIT_FAILURE;
} else {
if (bb_copyfd_eof(fd_data, fd_local) == -1)
return EXIT_FAILURE;
}
/* close it all down */
close(fd_data);
if (ftpcmd(NULL, NULL, control_stream, buf) != 226) {
ftp_die(NULL, buf);
}
ftpcmd("QUIT", NULL, control_stream, buf);
return EXIT_SUCCESS;
}
int lpqr_main(int argc UNUSED_PARAM, char *argv[])
{
enum {
OPT_P = 1 << 0, // -P queue[@host[:port]]. If no -P is given use $PRINTER, then "lp@localhost:515"
OPT_U = 1 << 1, // -U username
LPR_V = 1 << 2, // -V: be verbose
LPR_h = 1 << 3, // -h: want banner printed
LPR_C = 1 << 4, // -C class: job "class" (? supposedly printed on banner)
LPR_J = 1 << 5, // -J title: the job title for the banner page
LPR_m = 1 << 6, // -m: send mail back to user
LPQ_SHORT_FMT = 1 << 2, // -s: short listing format
LPQ_DELETE = 1 << 3, // -d: delete job(s)
LPQ_FORCE = 1 << 4, // -f: force waiting job(s) to be printed
};
char tempfile[sizeof("/tmp/lprXXXXXX")];
const char *job_title;
const char *printer_class = ""; // printer class, max 32 char
const char *queue; // name of printer queue
const char *server = "localhost"; // server[:port] of printer queue
char *hostname;
// N.B. IMHO getenv("USER") can be way easily spoofed!
const char *user = xuid2uname(getuid());
unsigned job;
unsigned opts;
int fd;
queue = getenv("PRINTER");
if (!queue)
queue = "lp";
// parse options
// TODO: set opt_complementary: s,d,f are mutually exclusive
opts = getopt32(argv,
(/*lp*/'r' == applet_name[2]) ? "P:U:VhC:J:m" : "P:U:sdf"
, &queue, &user
, &printer_class, &job_title
);
argv += optind;
{
// queue name is to the left of '@'
char *s = strchr(queue, '@');
if (s) {
// server name is to the right of '@'
*s = '\0';
server = s + 1;
}
}
// do connect
fd = create_and_connect_stream_or_die(server, 515);
//
// LPQ ------------------------
//
if (/*lp*/'q' == applet_name[2]) {
char cmd;
// force printing of every job still in queue
if (opts & LPQ_FORCE) {
cmd = 1;
goto command;
// delete job(s)
} else if (opts & LPQ_DELETE) {
fdprintf(fd, "\x5" "%s %s", queue, user);
while (*argv) {
fdprintf(fd, " %s", *argv++);
}
bb_putchar('\n');
// dump current jobs status
// N.B. periodical polling should be achieved
// via "watch -n delay lpq"
// They say it's the UNIX-way :)
} else {
cmd = (opts & LPQ_SHORT_FMT) ? 3 : 4;
command:
fdprintf(fd, "%c" "%s\n", cmd, queue);
bb_copyfd_eof(fd, STDOUT_FILENO);
}
return EXIT_SUCCESS;
}
//
// LPR ------------------------
//
if (opts & LPR_V)
bb_error_msg("connected to server");
job = getpid() % 1000;
hostname = safe_gethostname();
// no files given on command line? -> use stdin
if (!*argv)
*--argv = (char *)"-";
fdprintf(fd, "\x2" "%s\n", queue);
get_response_or_say_and_die(fd, "setting queue");
// process files
do {
unsigned cflen;
int dfd;
struct stat st;
char *c;
char *remote_filename;
char *controlfile;
// if data file is stdin, we need to dump it first
if (LONE_DASH(*argv)) {
strcpy(tempfile, "/tmp/lprXXXXXX");
dfd = xmkstemp(tempfile);
bb_copyfd_eof(STDIN_FILENO, dfd);
xlseek(dfd, 0, SEEK_SET);
*argv = (char*)bb_msg_standard_input;
} else {
dfd = xopen(*argv, O_RDONLY);
}
st.st_size = 0; /* paranoia: fstat may theoretically fail */
fstat(dfd, &st);
/* Apparently, some servers are buggy and won't accept 0-sized jobs.
* Standard lpr works around it by refusing to send such jobs:
*/
if (st.st_size == 0) {
bb_error_msg("nothing to print");
continue;
}
/* "The name ... should start with ASCII "cfA",
* followed by a three digit job number, followed
* by the host name which has constructed the file."
* We supply 'c' or 'd' as needed for control/data file. */
remote_filename = xasprintf("fA%03u%s", job, hostname);
// create control file
// TODO: all lines but 2 last are constants! How we can use this fact?
controlfile = xasprintf(
"H" "%.32s\n" "P" "%.32s\n" /* H HOST, P USER */
"C" "%.32s\n" /* C CLASS - printed on banner page (if L cmd is also given) */
"J" "%.99s\n" /* J JOBNAME */
/* "class name for banner page and job name
* for banner page commands must precede L command" */
"L" "%.32s\n" /* L USER - print banner page, with given user's name */
"M" "%.32s\n" /* M WHOM_TO_MAIL */
"l" "d%.31s\n" /* l DATA_FILE_NAME ("dfAxxx") */
, hostname, user
, printer_class /* can be "" */
, ((opts & LPR_J) ? job_title : *argv)
, (opts & LPR_h) ? user : ""
, (opts & LPR_m) ? user : ""
, remote_filename
);
// delete possible "\nX\n" (that is, one-char) patterns
c = controlfile;
while ((c = strchr(c, '\n')) != NULL) {
if (c[1] && c[2] == '\n') {
overlapping_strcpy(c, c+2);
} else {
c++;
}
}
// send control file
if (opts & LPR_V)
bb_error_msg("sending control file");
/* "Acknowledgement processing must occur as usual
* after the command is sent." */
cflen = (unsigned)strlen(controlfile);
fdprintf(fd, "\x2" "%u c%s\n", cflen, remote_filename);
get_response_or_say_and_die(fd, "sending control file");
/* "Once all of the contents have
* been delivered, an octet of zero bits is sent as
* an indication that the file being sent is complete.
* A second level of acknowledgement processing
* must occur at this point." */
full_write(fd, controlfile, cflen + 1); /* writes NUL byte too */
get_response_or_say_and_die(fd, "sending control file");
// send data file, with name "dfaXXX"
if (opts & LPR_V)
bb_error_msg("sending data file");
fdprintf(fd, "\x3" "%"FILESIZE_FMT"u d%s\n", st.st_size, remote_filename);
get_response_or_say_and_die(fd, "sending data file");
if (bb_copyfd_size(dfd, fd, st.st_size) != st.st_size) {
// We're screwed. We sent less bytes than we advertised.
bb_error_msg_and_die("local file changed size?!");
}
write(fd, "", 1); // send ACK
get_response_or_say_and_die(fd, "sending data file");
// delete temporary file if we dumped stdin
if (*argv == (char*)bb_msg_standard_input)
unlink(tempfile);
// cleanup
close(fd);
free(remote_filename);
free(controlfile);
// say job accepted
if (opts & LPR_V)
bb_error_msg("job accepted");
// next, please!
job = (job + 1) % 1000;
} while (*++argv);
return EXIT_SUCCESS;
}