static void
startpr(int enable)
{
struct stat stbuf;
if (cgetstr(bp, "sd", &SD) == -1)
SD = _PATH_DEFSPOOL;
if (cgetstr(bp, "lo", &LO) == -1)
LO = DEFLOCK;
(void)snprintf(line, sizeof(line), "%s/%s", SD, LO);
printf("%s:\n", printer);
/*
* Turn off the owner execute bit of the lock file to enable printing.
* If we are marking the printer "up" also turn off group execute bit.
*/
PRIV_START;
if (enable && stat(line, &stbuf) >= 0) {
if (enable == 2)
stbuf.st_mode &= ~(S_IXUSR|S_IXGRP);
else
stbuf.st_mode &= ~S_IXUSR;
if (chmod(line, stbuf.st_mode & 0777) < 0)
printf("\tcannot enable printing\n");
else
printf("\tprinting enabled\n");
}
PRIV_END;
if (!startdaemon(printer))
printf("\tcouldn't start daemon\n");
else
printf("\tdaemon started\n");
}
/*ARGSUSED*/
int openmem(int trystart)
{
initpkey();
shmid = shmget(pkey, SHMFLAG, 0);
if (shmid < 0) { /* Could not find the shared memory */
if (errno != ENOENT) { /* Error other not created yet */
perror("shmget");
exit(1);
}
if (trystart==1){ /* Create the memory */
startdaemon();
}
else if (trystart < 0){ /* Just checking if it exists */
return 0;
}
else { /* Wanted to use it, but... */
fprintf(stderr,"Warning: Daemon not running!\n");
exit(1);
}
shmid = shmget(pkey, SHMFLAG, 0);
if (shmid < 0) { /* This is a bummer of an error */
ERROR(1, ("Daemon not running (err:%d)\n",errno));
exit(1);
}
}
sharedMemory = (struct memory *) shmat(shmid, 0, 0);
if (sharedMemory == (struct memory *) -1) {
printf("Error number: %d\n",errno);
perror("shared memory");
exit(1);
}
setup_memory(sharedMemory);
opensem();
return 1;
}
void
rmjob(const char *printer)
{
register int i, nitems;
int assassinated = 0;
struct dirent **files;
char *cp;
struct printer myprinter, *pp = &myprinter;
init_printer(pp);
if ((i = getprintcap(printer, pp)) < 0)
fatal(pp, "getprintcap: %s", pcaperr(i));
if ((cp = checkremote(pp))) {
printf("Warning: %s\n", cp);
free(cp);
}
/*
* If the format was `lprm -' and the user isn't the super-user,
* then fake things to look like he said `lprm user'.
*/
if (users < 0) {
if (getuid() == 0)
all = 1; /* all files in local queue */
else {
user[0] = person;
users = 1;
}
}
if (!strcmp(person, "-all")) {
if (from_host == local_host)
fatal(pp, "The login name \"-all\" is reserved");
all = 1; /* all those from 'from_host' */
person = root;
}
seteuid(euid);
if (chdir(pp->spool_dir) < 0)
fatal(pp, "cannot chdir to spool directory");
if ((nitems = scandir(".", &files, iscf, NULL)) < 0)
fatal(pp, "cannot access spool directory");
seteuid(uid);
if (nitems) {
/*
* Check for an active printer daemon (in which case we
* kill it if it is reading our file) then remove stuff
* (after which we have to restart the daemon).
*/
if (lockchk(pp, pp->lock_file) && chk(current)) {
seteuid(euid);
assassinated = kill(cur_daemon, SIGINT) == 0;
seteuid(uid);
if (!assassinated)
fatal(pp, "cannot kill printer daemon");
}
/*
* process the files
*/
for (i = 0; i < nitems; i++)
process(pp, files[i]->d_name);
}
rmremote(pp);
/*
* Restart the printer daemon if it was killed
*/
if (assassinated && !startdaemon(pp))
fatal(pp, "cannot restart printer daemon\n");
exit(0);
}
int
main(int argc, char *argv[])
{
struct passwd *pw;
struct group *gptr;
const char *arg, *cp, *printer;
char *p;
char buf[BUFSIZ];
int c, i, f, errs;
int ret, didlink;
struct stat stb;
struct stat statb1, statb2;
struct printer myprinter, *pp = &myprinter;
printer = NULL;
euid = geteuid();
uid = getuid();
PRIV_END
if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
signal(SIGHUP, cleanup);
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
signal(SIGINT, cleanup);
if (signal(SIGQUIT, SIG_IGN) != SIG_IGN)
signal(SIGQUIT, cleanup);
if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
signal(SIGTERM, cleanup);
progname = argv[0];
gethostname(local_host, sizeof(local_host));
openlog("lpd", 0, LOG_LPR);
errs = 0;
while ((c = getopt(argc, argv,
":#:1:2:3:4:C:J:L:P:T:U:Z:cdfghi:lnmprstvw:"))
!= -1)
switch (c) {
case '#': /* n copies */
i = strtol(optarg, &p, 10);
if (*p)
errx(1, "Bad argument to -#, number expected");
if (i > 0)
ncopies = i;
break;
case '1': /* troff fonts */
case '2':
case '3':
case '4':
fonts[optopt - '1'] = optarg;
break;
case 'C': /* classification spec */
hdr++;
class = optarg;
break;
case 'J': /* job name */
hdr++;
jobname = optarg;
break;
case 'P': /* specifiy printer name */
printer = optarg;
break;
case 'L': /* pr's locale */
locale = optarg;
break;
case 'T': /* pr's title line */
title = optarg;
break;
case 'U': /* user name */
hdr++;
Uflag = optarg;
break;
case 'Z':
Zflag = optarg;
break;
case 'c': /* print cifplot output */
case 'd': /* print tex output (dvi files) */
case 'g': /* print graph(1G) output */
case 'l': /* literal output */
case 'n': /* print ditroff output */
case 't': /* print troff output (cat files) */
case 'p': /* print using ``pr'' */
case 'v': /* print vplot output */
format = optopt;
break;
case 'f': /* print fortran output */
format = 'r';
break;
case 'h': /* nulifiy header page */
hdr = 0;
break;
case 'i': /* indent output */
iflag++;
indent = strtol(optarg, &p, 10);
if (*p)
errx(1, "Bad argument to -i, number expected");
break;
case 'm': /* send mail when done */
mailflg++;
break;
case 'q': /* just queue job */
qflag++;
break;
case 'r': /* remove file when done */
rflag++;
break;
case 's': /* try to link files */
sflag++;
break;
case 'w': /* versatec page width */
width = optarg;
break;
case ':': /* catch "missing argument" error */
if (optopt == 'i') {
iflag++; /* -i without args is valid */
indent = 8;
} else
errs++;
break;
default:
errs++;
}
argc -= optind;
argv += optind;
if (errs)
usage();
if (printer == NULL && (printer = getenv("PRINTER")) == NULL)
printer = DEFLP;
chkprinter(printer, pp);
if (pp->no_copies && ncopies > 1)
errx(1, "multiple copies are not allowed");
if (pp->max_copies > 0 && ncopies > pp->max_copies)
errx(1, "only %ld copies are allowed", pp->max_copies);
/*
* Get the identity of the person doing the lpr using the same
* algorithm as lprm. Actually, not quite -- lprm will override
* the login name with "root" if the user is running as root;
* the daemon actually checks for the string "root" in its
* permission checking. Sigh.
*/
userid = getuid();
if (Uflag) {
if (userid != 0 && userid != pp->daemon_user)
errx(1, "only privileged users may use the `-U' flag");
lpr_username = Uflag; /* -U person doing 'lpr' */
} else {
lpr_username = getlogin(); /* person doing 'lpr' */
if (userid != pp->daemon_user || lpr_username == 0) {
if ((pw = getpwuid(userid)) == NULL)
errx(1, "Who are you?");
lpr_username = pw->pw_name;
}
}
/*
* Check for restricted group access.
*/
if (pp->restrict_grp != NULL && userid != pp->daemon_user) {
if ((gptr = getgrnam(pp->restrict_grp)) == NULL)
errx(1, "Restricted group specified incorrectly");
if (gptr->gr_gid != getgid()) {
while (*gptr->gr_mem != NULL) {
if ((strcmp(lpr_username, *gptr->gr_mem)) == 0)
break;
gptr->gr_mem++;
}
if (*gptr->gr_mem == NULL)
errx(1, "Not a member of the restricted group");
}
}
/*
* Check to make sure queuing is enabled if userid is not root.
*/
lock_file_name(pp, buf, sizeof buf);
if (userid && stat(buf, &stb) == 0 && (stb.st_mode & LFM_QUEUE_DIS))
errx(1, "Printer queue is disabled");
/*
* Initialize the control file.
*/
mktemps(pp);
tfd = nfile(tfname);
PRIV_START
(void) fchown(tfd, pp->daemon_user, -1);
/* owned by daemon for protection */
PRIV_END
card('H', local_host);
card('P', lpr_username);
card('C', class);
if (hdr && !pp->no_header) {
if (jobname == NULL) {
if (argc == 0)
jobname = "stdin";
else
jobname = ((arg = strrchr(argv[0], '/'))
? arg + 1 : argv[0]);
}
card('J', jobname);
card('L', lpr_username);
}
if (format != 'p' && Zflag != 0)
card('Z', Zflag);
if (iflag)
card('I', itoa(indent));
if (mailflg)
card('M', lpr_username);
if (format == 't' || format == 'n' || format == 'd')
for (i = 0; i < 4; i++)
if (fonts[i] != NULL)
card('1'+i, fonts[i]);
if (width != NULL)
card('W', width);
/*
* XXX
* Our use of `Z' here is incompatible with LPRng's
* use. We assume that the only use of our existing
* `Z' card is as shown for `p' format (pr) files.
*/
if (format == 'p') {
char *s;
if (locale)
card('Z', locale);
else if ((s = setlocale(LC_TIME, "")) != NULL)
card('Z', s);
}
/*
* Read the files and spool them.
*/
if (argc == 0)
copy(pp, 0, " ");
else while (argc--) {
if (argv[0][0] == '-' && argv[0][1] == '\0') {
/* use stdin */
copy(pp, 0, " ");
argv++;
continue;
}
if ((f = test(arg = *argv++)) < 0)
continue; /* file unreasonable */
if (sflag && (cp = linked(arg)) != NULL) {
(void)snprintf(buf, sizeof(buf), "%ju %ju",
(uintmax_t)statb.st_dev, (uintmax_t)statb.st_ino);
card('S', buf);
if (format == 'p')
card('T', title ? title : arg);
for (i = 0; i < ncopies; i++)
card(format, &dfname[inchar-2]);
card('U', &dfname[inchar-2]);
if (f)
card('U', cp);
card('N', arg);
dfname[inchar]++;
nact++;
continue;
}
if (sflag)
printf("%s: %s: not linked, copying instead\n",
progname, arg);
if (f) {
/*
* The user wants the file removed after it is copied
* to the spool area, so see if the file can be moved
* instead of copy/unlink'ed. This is much faster and
* uses less spool space than copying the file. This
* can be very significant when running services like
* samba, pcnfs, CAP, et al.
*/
PRIV_START
didlink = 0;
/*
* There are several things to check to avoid any
* security issues. Some of these are redundant
* under BSD's, but are necessary when lpr is built
* under some other OS's (which I do do...)
*/
if (lstat(arg, &statb1) < 0)
goto nohardlink;
if (S_ISLNK(statb1.st_mode))
goto nohardlink;
if (link(arg, dfname) != 0)
goto nohardlink;
didlink = 1;
/*
* Make sure the user hasn't tried to trick us via
* any race conditions
*/
if (lstat(dfname, &statb2) < 0)
goto nohardlink;
if (statb1.st_dev != statb2.st_dev)
goto nohardlink;
if (statb1.st_ino != statb2.st_ino)
goto nohardlink;
/*
* Skip if the file already had multiple hard links,
* because changing the owner and access-bits would
* change ALL versions of the file
*/
if (statb2.st_nlink > 2)
goto nohardlink;
/*
* If we can access and remove the original file
* without special setuid-ness then this method is
* safe. Otherwise, abandon the move and fall back
* to the (usual) copy method.
*/
PRIV_END
ret = access(dfname, R_OK);
if (ret == 0)
ret = unlink(arg);
PRIV_START
if (ret != 0)
goto nohardlink;
/*
* Unlink of user file was successful. Change the
* owner and permissions, add entries to the control
* file, and skip the file copying step.
*/
chown(dfname, pp->daemon_user, getegid());
chmod(dfname, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
PRIV_END
if (format == 'p')
card('T', title ? title : arg);
for (i = 0; i < ncopies; i++)
card(format, &dfname[inchar-2]);
card('U', &dfname[inchar-2]);
card('N', arg);
nact++;
continue;
nohardlink:
if (didlink)
unlink(dfname);
PRIV_END /* restore old uid */
} /* end: if (f) */
if ((i = open(arg, O_RDONLY)) < 0) {
printf("%s: cannot open %s\n", progname, arg);
} else {
copy(pp, i, arg);
(void) close(i);
if (f && unlink(arg) < 0)
printf("%s: %s: not removed\n", progname, arg);
}
}
if (nact) {
(void) close(tfd);
tfname[inchar]--;
/*
* Touch the control file to fix position in the queue.
*/
PRIV_START
if ((tfd = open(tfname, O_RDWR)) >= 0) {
char touch_c;
if (read(tfd, &touch_c, 1) == 1 &&
lseek(tfd, (off_t)0, 0) == 0 &&
write(tfd, &touch_c, 1) != 1) {
printf("%s: cannot touch %s\n", progname,
tfname);
tfname[inchar]++;
cleanup(0);
}
(void) close(tfd);
}
if (link(tfname, cfname) < 0) {
printf("%s: cannot rename %s\n", progname, cfname);
tfname[inchar]++;
cleanup(0);
}
unlink(tfname);
PRIV_END
if (qflag) /* just q things up */
exit(0);
if (!startdaemon(pp))
printf("jobs queued, but cannot start daemon.\n");
exit(0);
}
cleanup(0);
return (1);
/* NOTREACHED */
}
int
main(int argc, char *argv[])
{
struct passwd *pw;
struct group *gptr;
char *arg;
const char *cp;
char buf[MAXPATHLEN];
int i, f, errs, c;
struct stat stb;
int oerrno;
euid = geteuid();
uid = getuid();
seteuid(uid);
if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
signal(SIGHUP, cleanup);
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
signal(SIGINT, cleanup);
if (signal(SIGQUIT, SIG_IGN) != SIG_IGN)
signal(SIGQUIT, cleanup);
if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
signal(SIGTERM, cleanup);
setprogname(*argv);
gethostname(host, sizeof (host));
host[sizeof(host) - 1] = '\0';
openlog("lpd", 0, LOG_LPR);
errs = 0;
while ((c = getopt(argc, argv,
":#:1:2:3:4:C:J:P:RT:U:cdfghi:lmnopqrstvw:")) != -1) {
switch (c) {
case '#': /* n copies */
if (isdigit((unsigned char)*optarg)) {
i = atoi(optarg);
if (i > 0)
ncopies = i;
}
break;
case '4': /* troff fonts */
case '3':
case '2':
case '1':
fonts[optopt - '1'] = optarg;
break;
case 'C': /* classification spec */
hdr++;
class = optarg;
break;
case 'J': /* job name */
hdr++;
jobname = optarg;
break;
case 'P': /* specifiy printer name */
printer = optarg;
break;
case 'R': /* print request id */
Rflag++;
break;
case 'T': /* pr's title line */
title = optarg;
break;
case 'U': /* user name */
hdr++;
person = optarg;
break;
case 'c': /* print cifplot output */
case 'd': /* print tex output (dvi files) */
case 'g': /* print graph(1G) output */
case 'l': /* literal output */
case 'o': /* print postscript output */
case 'n': /* print ditroff output */
case 'p': /* print using ``pr'' */
case 't': /* print troff output (cat files) */
case 'v': /* print vplot output */
format = optopt;
break;
case 'f': /* print fortran output */
format = 'r';
break;
case 'h': /* toggle want of header page */
hdr = !hdr;
break;
case 'i': /* indent output */
iflag++;
indent = atoi(optarg);
if (indent < 0)
indent = 8;
break;
case 'm': /* send mail when done */
mailflg++;
break;
case 'q': /* just q job */
qflag++;
break;
case 'r': /* remove file when done */
rflag++;
break;
case 's': /* try to link files */
sflag++;
break;
case 'w': /* versatec page width */
width = optarg;
break;
case ':': /* catch "missing argument" error */
if (optopt == 'i') {
iflag++; /* -i without args is valid */
indent = 8;
} else
errs++;
break;
default:
errs++;
}
}
argc -= optind;
argv += optind;
if (errs)
usage();
if (printer == NULL && (printer = getenv("PRINTER")) == NULL)
printer = DEFLP;
chkprinter(printer);
if (SC && ncopies > 1)
errx(EXIT_FAILURE, "multiple copies are not allowed");
if (MC > 0 && ncopies > MC)
errx(EXIT_FAILURE, "only %ld copies are allowed", MC);
/*
* Get the identity of the person doing the lpr using the same
* algorithm as lprm.
*/
userid = getuid();
if (userid != DU || person == 0) {
if ((pw = getpwuid(userid)) == NULL)
errx(EXIT_FAILURE, "Who are you?");
person = pw->pw_name;
}
/*
* Check for restricted group access.
*/
if (RG != NULL && userid != DU) {
if ((gptr = getgrnam(RG)) == NULL)
errx(EXIT_FAILURE,
"Restricted group specified incorrectly");
if (gptr->gr_gid != getgid()) {
while (*gptr->gr_mem != NULL) {
if ((strcmp(person, *gptr->gr_mem)) == 0)
break;
gptr->gr_mem++;
}
if (*gptr->gr_mem == NULL)
errx(EXIT_FAILURE,
"Not a member of the restricted group");
}
}
/*
* Check to make sure queuing is enabled if userid is not root.
*/
(void)snprintf(buf, sizeof buf, "%s/%s", SD, LO);
if (userid && stat(buf, &stb) == 0 && (stb.st_mode & S_IXGRP))
errx(EXIT_FAILURE, "Printer queue is disabled");
/*
* Initialize the control file.
*/
mktemps();
tfd = nfile(tfname);
seteuid(euid);
(void)fchown(tfd, DU, -1); /* owned by daemon for protection */
seteuid(uid);
card('H', host);
card('P', person);
if (hdr && !SH) {
if (jobname == NULL) {
if (argc == 0)
jobname = "stdin";
else
jobname = (arg = strrchr(argv[0], '/')) ?
arg+1 : argv[0];
}
card('J', jobname);
card('C', class);
card('L', person);
}
if (iflag)
card('I', itoa(indent));
if (mailflg)
card('M', person);
if (format == 't' || format == 'n' || format == 'd')
for (i = 0; i < 4; i++)
if (fonts[i] != NULL)
card('1'+i, fonts[i]);
if (width != NULL)
card('W', width);
/*
* Read the files and spool them.
*/
if (argc == 0)
copy(0, " ");
else while (argc--) {
if (argv[0][0] == '-' && argv[0][1] == '\0') {
/* use stdin */
copy(0, " ");
argv++;
continue;
}
if ((f = test(arg = *argv++)) < 0)
continue; /* file unreasonable */
if (sflag && (cp = linked(arg)) != NULL) {
(void)snprintf(buf, sizeof buf,
"%llu %llu",
(unsigned long long)statb.st_dev,
(unsigned long long)statb.st_ino);
card('S', buf);
if (format == 'p')
card('T', title ? title : arg);
for (i = 0; i < ncopies; i++)
card(format, &dfname[inchar-2]);
card('U', &dfname[inchar-2]);
if (f)
card('U', cp);
card('N', arg);
dfname[inchar]++;
nact++;
continue;
}
if (sflag)
warnx("%s: not linked, copying instead", arg);
seteuid(uid);
if ((i = open(arg, O_RDONLY)) < 0) {
oerrno = errno;
seteuid(uid);
errno = oerrno;
warn("cannot open %s", arg);
continue;
} else {
copy(i, arg);
(void)close(i);
if (f && unlink(arg) < 0)
warn("%s: not removed", arg);
}
seteuid(uid);
}
if (nact) {
(void)close(tfd);
tfname[inchar]--;
/*
* Touch the control file to fix position in the queue.
*/
seteuid(euid);
if ((tfd = open(tfname, O_RDWR)) >= 0) {
char ch;
if (read(tfd, &ch, 1) == 1 &&
lseek(tfd, (off_t)0, 0) == 0 &&
write(tfd, &ch, 1) != 1) {
warn("cannot touch %s", tfname);
tfname[inchar]++;
cleanup(0);
}
(void)close(tfd);
}
if (link(tfname, cfname) < 0) {
warn("cannot rename %s", cfname);
tfname[inchar]++;
cleanup(0);
}
unlink(tfname);
seteuid(uid);
if (Rflag)
printf("request id is %d\n", reqid);
if (qflag) /* just queue things up */
exit(0);
if (!startdaemon(printer))
printf("jobs queued, but cannot start daemon.\n");
exit(0);
}
cleanup(0);
#ifdef __GNUC__
return (0);
#endif
/* NOTREACHED */
}
void
rmjob(void)
{
int i, nitems;
int assassinated = 0;
struct dirent **files;
char *cp;
if ((i = cgetent(&bp, printcapdb, printer)) == -2)
fatal("can't open printer description file");
else if (i == -1)
fatal("unknown printer");
else if (i == -3)
fatal("potential reference loop detected in printcap file");
if (cgetstr(bp, DEFLP, &LP) < 0)
LP = _PATH_DEFDEVLP;
if (cgetstr(bp, "rp", &RP) < 0)
RP = DEFLP;
if (cgetstr(bp, "sd", &SD) < 0)
SD = _PATH_DEFSPOOL;
if (cgetstr(bp,"lo", &LO) < 0)
LO = DEFLOCK;
cgetstr(bp, "rm", &RM);
if ((cp = checkremote()) != NULL)
printf("Warning: %s\n", cp);
/*
* If the format was `lprm -' and the user isn't the super-user,
* then fake things to look like he said `lprm user'.
*/
if (users < 0) {
if (getuid() == 0)
all = 1; /* all files in local queue */
else {
user[0] = person;
users = 1;
}
}
if (!strcmp(person, "-all")) {
if (from == host)
fatal("The login name \"-all\" is reserved");
all = 1; /* all those from 'from' */
person = root;
}
PRIV_START;
if (chdir(SD) < 0)
fatal("cannot chdir to spool directory");
if ((nitems = scandir(".", &files, iscf, NULL)) < 0)
fatal("cannot access spool directory");
PRIV_END;
if (nitems) {
/*
* Check for an active printer daemon. If one is running
* and it is reading our file, kill it, then remove stuff.
* Lastly, restart the daemon if it is not (or no longer)
* running.
*/
if (lockchk(LO) && chk(current)) {
PRIV_START;
assassinated = kill(cur_daemon, SIGINT) == 0;
PRIV_END;
if (!assassinated)
fatal("cannot kill printer daemon");
}
/*
* process the files
*/
for (i = 0; i < nitems; i++)
process(files[i]->d_name);
}
rmremote();
/*
* Restart the printer daemon if it was killed
*/
if (assassinated && !startdaemon(printer))
fatal("cannot restart printer daemon");
exit(0);
}
void
openmem(int code, int leagueflag)
{
extern int errno; /* to get error number */
key_t shmemKey = PKEY; /* shared memory's key */
struct memory *sharedMemory;/* to point to shared memory */
char *k;
k = getenv("TREKSHMKEY"); /* grab shared mem id environment variable */
if (k) { /* if it's set... */
int i;
if (sscanf(k, "%d", &i) > 0 && i > 0) /* ...grab its value... */
shmemKey = i; /* ...and use it */
}
errno = 0; /* clear error number */
shmid = shmget(shmemKey, 0, 0); /* get id of shared mem */
if (code == 2) {
if (shmid >= 0) {
/* If we're in daemon mode and we opened the memory */
/* "There can be only one". */
fprintf(stderr, "Killing existing segment\n");
shmctl(shmid, IPC_RMID, (struct shmid_ds *) 0);
/* create a new one */
}
shmid = shmget(shmemKey, sizeof(struct memory), IPC_CREAT | 0666);
}
if (shmid < 0) { /* if shared mem does not exist */
switch (code) {
case 0:
if (errno != ENOENT) { /* catastrophic, sell all your stock */
perror("shmget"); /* and leave the country type of */
exit(1); /* error--suicide */
}
fprintf(stderr, "Daemon not running (err:%d)\n", errno);
exit(1);
case 1:
if (errno != ENOENT) { /* catastrophic, sell all your stock */
perror("shmget"); /* and leave the country type of */
exit(1); /* error--suicide */
}
startdaemon(leagueflag, 0); /* try to start the daemon */
sleep(2); /* wait for a sec for deamon to start */
shmid = shmget(shmemKey, 0, 0); /* try again to get shared
mem */
if (shmid < 0) { /* failure again then get out of here */
fprintf(stderr, "Daemon not running (err:%d)\n", errno);
exit(1);
}
break;
case 2:
perror("daemon: can't open shared memory");
exit(1);
}
}
if (code == 2) {
struct shmid_ds smbuf;
shmctl(shmid, IPC_STAT, &smbuf); /* Hose Ed's robots */
smbuf.shm_perm.uid = geteuid();
smbuf.shm_perm.mode = 0666;
shmctl(shmid, IPC_SET, &smbuf);
}
sharedMemory = (struct memory *) shmat(shmid, (char *) 0, 0);
if (sharedMemory == (struct memory *)(-1)) {
perror("shared memory");
exit(1);
}
if (code == 2) {
/* set the magic number */
sharedMemory->shmem_size = sizeof(struct memory);
}
else {
if (sharedMemory->shmem_size != sizeof(struct memory)) {
fprintf(stderr, "shared memory segment magic number mismatch!\
(%d != %ld)\n aborting to prevent corruption of game data\n",
sharedMemory->shmem_size, (long) sizeof(struct memory));
exit(1);
}
}
int
main(int argc, char **argv)
{
struct passwd *pw;
struct group *gptr;
char *arg, *cp;
char buf[MAXPATHLEN];
int i, f, ch;
struct stat stb;
/*
* Simulate setuid daemon w/ PRIV_END called.
* We don't want lpr to actually be setuid daemon since that
* requires that the lpr binary be owned by user daemon, which
* is potentially unsafe.
*/
if ((pw = getpwuid(DEFUID)) == NULL)
errx(1, "daemon uid (%u) not in password file", DEFUID);
effective_uid = pw->pw_uid;
real_uid = getuid();
effective_gid = pw->pw_gid;
real_gid = getgid();
setresgid(real_gid, real_gid, effective_gid);
setresuid(real_uid, real_uid, effective_uid);
if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
signal(SIGHUP, cleanup);
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
signal(SIGINT, cleanup);
if (signal(SIGQUIT, SIG_IGN) != SIG_IGN)
signal(SIGQUIT, cleanup);
if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
signal(SIGTERM, cleanup);
gethostname(host, sizeof (host));
openlog("lpr", 0, LOG_LPR);
while ((ch = getopt(argc, argv,
":#:1:2:3:4:C:J:P:T:U:cdfghi:lmnpqrstvw:")) != -1) {
switch (ch) {
case '#': /* n copies */
if (isdigit((unsigned char)*optarg)) {
i = atoi(optarg);
if (i > 0)
ncopies = i;
}
break;
case '4': /* troff fonts */
case '3':
case '2':
case '1':
fonts[ch - '1'] = optarg;
break;
case 'C': /* classification spec */
hdr++;
class = optarg;
break;
case 'J': /* job name */
hdr++;
jobname = optarg;
break;
case 'P': /* specifiy printer name */
printer = optarg;
break;
case 'T': /* pr's title line */
title = optarg;
break;
case 'U': /* user name */
hdr++;
person = optarg;
break;
case 'c': /* print cifplot output */
case 'd': /* print tex output (dvi files) */
case 'g': /* print graph(1G) output */
case 'l': /* literal output */
case 'n': /* print ditroff output */
case 'p': /* print using ``pr'' */
case 't': /* print troff output (cat files) */
case 'v': /* print vplot output */
format = ch;
break;
case 'f': /* print fortran output */
format = 'r';
break;
case 'h': /* toggle want of header page */
hdr = !hdr;
break;
case 'i': /* indent output */
iflag++;
indent = atoi(optarg);
if (indent < 0)
indent = 8;
break;
case 'm': /* send mail when done */
mailflg++;
break;
case 'q': /* just q job */
qflag++;
break;
case 'r': /* remove file when done */
rflag++;
break;
case 's': /* try to link files */
sflag++;
break;
case 'w': /* versatec page width */
width = optarg;
break;
case ':': /* catch "missing argument" error */
if (optopt == 'i') {
iflag++; /* -i without args is valid */
indent = 8;
} else
usage();
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (printer == NULL && (printer = getenv("PRINTER")) == NULL)
printer = DEFLP;
chkprinter(printer);
if (SC && ncopies > 1)
errx(1, "multiple copies are not allowed");
if (MC > 0 && ncopies > MC)
errx(1, "only %ld copies are allowed", MC);
/*
* Get the identity of the person doing the lpr using the same
* algorithm as lprm.
*/
if (real_uid != DU || person == NULL) {
if ((pw = getpwuid(real_uid)) == NULL)
errx(1, "Who are you?");
if ((person = strdup(pw->pw_name)) == NULL)
err(1, NULL);
}
/*
* Check for restricted group access.
*/
if (RG != NULL && real_uid != DU) {
if ((gptr = getgrnam(RG)) == NULL)
errx(1, "Restricted group specified incorrectly");
if (gptr->gr_gid != getgid()) {
while (*gptr->gr_mem != NULL) {
if ((strcmp(person, *gptr->gr_mem)) == 0)
break;
gptr->gr_mem++;
}
if (*gptr->gr_mem == NULL)
errx(1, "Not a member of the restricted group");
}
}
/*
* Check to make sure queuing is enabled if real_uid is not root.
*/
(void)snprintf(buf, sizeof(buf), "%s/%s", SD, LO);
if (real_uid && stat(buf, &stb) == 0 && (stb.st_mode & 010))
errx(1, "Printer queue is disabled");
/*
* Initialize the control file.
*/
mktemps();
tfd = nfile(tfname);
card('H', host);
card('P', person);
if (hdr) {
if (jobname == NULL) {
if (argc == 0)
jobname = "stdin";
else
jobname = (arg = strrchr(argv[0], '/')) ?
arg + 1 : argv[0];
}
card('J', jobname);
card('C', class);
if (!SH)
card('L', person);
}
if (iflag)
card('I', itoa(indent));
if (mailflg)
card('M', person);
if (format == 't' || format == 'n' || format == 'd')
for (i = 0; i < 4; i++)
if (fonts[i] != NULL)
card('1'+i, fonts[i]);
if (width != NULL)
card('W', width);
/*
* Read the files and spool them.
*/
if (argc == 0)
copy(0, " ");
else while (argc--) {
if (argv[0][0] == '-' && argv[0][1] == '\0') {
/* use stdin */
copy(0, " ");
argv++;
continue;
}
if ((f = test(arg = *argv++)) < 0)
continue; /* file unreasonable */
if (sflag && (cp = linked(arg)) != NULL) {
(void)snprintf(buf, sizeof(buf), "%d %llu",
statb.st_dev, (unsigned long long)statb.st_ino);
card('S', buf);
if (format == 'p')
card('T', title ? title : arg);
for (i = 0; i < ncopies; i++)
card(format, &dfname[inchar-2]);
card('U', &dfname[inchar-2]);
if (f)
card('U', cp);
card('N', arg);
dfname[inchar]++;
nact++;
continue;
}
if (sflag)
warnx("%s: not linked, copying instead", arg);
if ((i = safe_open(arg, O_RDONLY, 0)) < 0)
warn("%s", arg);
else {
copy(i, arg);
(void)close(i);
if (f && unlink(arg) < 0)
warnx("%s: not removed", arg);
}
}
if (nact) {
(void)close(tfd);
tfname[inchar]--;
/*
* Touch the control file to fix position in the queue.
*/
PRIV_START;
if ((tfd = safe_open(tfname, O_RDWR|O_NOFOLLOW, 0)) >= 0) {
char c;
if (read(tfd, &c, 1) == 1 &&
lseek(tfd, (off_t)0, SEEK_SET) == 0 &&
write(tfd, &c, 1) != 1) {
warn("%s", tfname);
tfname[inchar]++;
cleanup(0);
}
(void)close(tfd);
}
if (link(tfname, cfname) < 0) {
warn("cannot rename %s", cfname);
tfname[inchar]++;
cleanup(0);
}
unlink(tfname);
PRIV_END;
if (qflag) /* just q things up */
exit(0);
if (!startdaemon(printer))
printf("jobs queued, but cannot start daemon.\n");
exit(0);
}
cleanup(0);
return (1);
/* NOTREACHED */
}
