4.4BSD/usr/src/usr.sbin/lpr/common_source/common.c
/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char sccsid[] = "@(#)common.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <dirent.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "lp.h"
#include "pathnames.h"
/*
* Routines and data common to all the line printer functions.
*/
char *AF; /* accounting file */
long BR; /* baud rate if lp is a tty */
char *CF; /* name of cifplot filter (per job) */
char *DF; /* name of tex filter (per job) */
long DU; /* daeomon user-id */
long FC; /* flags to clear if lp is a tty */
char *FF; /* form feed string */
long FS; /* flags to set if lp is a tty */
char *GF; /* name of graph(1G) filter (per job) */
long HL; /* print header last */
char *IF; /* name of input filter (created per job) */
char *LF; /* log file for error messages */
char *LO; /* lock file name */
char *LP; /* line printer device name */
long MC; /* maximum number of copies allowed */
long MX; /* maximum number of blocks to copy */
char *NF; /* name of ditroff filter (per job) */
char *OF; /* name of output filter (created once) */
char *PF; /* name of vrast filter (per job) */
long PL; /* page length */
long PW; /* page width */
long PX; /* page width in pixels */
long PY; /* page length in pixels */
char *RF; /* name of fortran text filter (per job) */
char *RG; /* resricted group */
char *RM; /* remote machine name */
char *RP; /* remote printer name */
long RS; /* restricted to those with local accounts */
long RW; /* open LP for reading and writing */
long SB; /* short banner instead of normal header */
long SC; /* suppress multiple copies */
char *SD; /* spool directory */
long SF; /* suppress FF on each print job */
long SH; /* suppress header page */
char *ST; /* status file name */
char *TF; /* name of troff filter (per job) */
char *TR; /* trailer string to be output when Q empties */
char *VF; /* name of vplot filter (per job) */
long XC; /* flags to clear for local mode */
long XS; /* flags to set for local mode */
char line[BUFSIZ];
char *bp; /* pointer into printcap buffer. */
char *name; /* program name */
char *printer; /* printer name */
/* host machine name */
char host[MAXHOSTNAMELEN];
char *from = host; /* client's machine name */
int sendtorem; /* are we sending to a remote? */
char *printcapdb[2] = { _PATH_PRINTCAP, 0 };
static int compar __P((const void *, const void *));
/*
* Create a connection to the remote printer server.
* Most of this code comes from rcmd.c.
*/
int
getport(rhost)
char *rhost;
{
struct hostent *hp;
struct servent *sp;
struct sockaddr_in sin;
int s, timo = 1, lport = IPPORT_RESERVED - 1;
int err;
/*
* Get the host address and port number to connect to.
*/
if (rhost == NULL)
fatal("no remote host to connect to");
hp = gethostbyname(rhost);
if (hp == NULL)
fatal("unknown host %s", rhost);
sp = getservbyname("printer", "tcp");
if (sp == NULL)
fatal("printer/tcp: unknown service");
bzero((char *)&sin, sizeof(sin));
bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length);
sin.sin_family = hp->h_addrtype;
sin.sin_port = sp->s_port;
/*
* Try connecting to the server.
*/
retry:
s = rresvport(&lport);
if (s < 0)
return(-1);
if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
err = errno;
(void) close(s);
errno = err;
if (errno == EADDRINUSE) {
lport--;
goto retry;
}
if (errno == ECONNREFUSED && timo <= 16) {
sleep(timo);
timo *= 2;
goto retry;
}
return(-1);
}
return(s);
}
/*
* Getline reads a line from the control file cfp, removes tabs, converts
* new-line to null and leaves it in line.
* Returns 0 at EOF or the number of characters read.
*/
int
getline(cfp)
FILE *cfp;
{
register int linel = 0;
register char *lp = line;
register c;
while ((c = getc(cfp)) != '\n') {
if (c == EOF)
return(0);
if (c == '\t') {
do {
*lp++ = ' ';
linel++;
} while ((linel & 07) != 0);
continue;
}
*lp++ = c;
linel++;
}
*lp++ = '\0';
return(linel);
}
/*
* Scan the current directory and make a list of daemon files sorted by
* creation time.
* Return the number of entries and a pointer to the list.
*/
int
getq(namelist)
struct queue *(*namelist[]);
{
register struct dirent *d;
register struct queue *q, **queue;
register int nitems;
struct stat stbuf;
DIR *dirp;
int arraysz;
if ((dirp = opendir(SD)) == NULL)
return(-1);
if (fstat(dirp->dd_fd, &stbuf) < 0)
goto errdone;
/*
* Estimate the array size by taking the size of the directory file
* and dividing it by a multiple of the minimum size entry.
*/
arraysz = (stbuf.st_size / 24);
queue = (struct queue **)malloc(arraysz * sizeof(struct queue *));
if (queue == NULL)
goto errdone;
nitems = 0;
while ((d = readdir(dirp)) != NULL) {
if (d->d_name[0] != 'c' || d->d_name[1] != 'f')
continue; /* daemon control files only */
if (stat(d->d_name, &stbuf) < 0)
continue; /* Doesn't exist */
q = (struct queue *)malloc(sizeof(time_t)+strlen(d->d_name)+1);
if (q == NULL)
goto errdone;
q->q_time = stbuf.st_mtime;
strcpy(q->q_name, d->d_name);
/*
* Check to make sure the array has space left and
* realloc the maximum size.
*/
if (++nitems > arraysz) {
queue = (struct queue **)realloc((char *)queue,
(stbuf.st_size/12) * sizeof(struct queue *));
if (queue == NULL)
goto errdone;
}
queue[nitems-1] = q;
}
closedir(dirp);
if (nitems)
qsort(queue, nitems, sizeof(struct queue *), compar);
*namelist = queue;
return(nitems);
errdone:
closedir(dirp);
return(-1);
}
/*
* Compare modification times.
*/
static int
compar(p1, p2)
const void *p1, *p2;
{
if ((*(struct queue **)p1)->q_time < (*(struct queue **)p2)->q_time)
return(-1);
if ((*(struct queue **)p1)->q_time > (*(struct queue **)p2)->q_time)
return(1);
return(0);
}
/*
* Figure out whether the local machine is the same
* as the remote machine (RM) entry (if it exists).
*/
char *
checkremote()
{
char name[MAXHOSTNAMELEN];
register struct hostent *hp;
static char errbuf[128];
sendtorem = 0; /* assume printer is local */
if (RM != (char *)NULL) {
/* get the official name of the local host */
gethostname(name, sizeof(name));
name[sizeof(name)-1] = '\0';
hp = gethostbyname(name);
if (hp == (struct hostent *) NULL) {
(void) snprintf(errbuf, sizeof(errbuf),
"unable to get official name for local machine %s",
name);
return errbuf;
} else (void) strcpy(name, hp->h_name);
/* get the official name of RM */
hp = gethostbyname(RM);
if (hp == (struct hostent *) NULL) {
(void) snprintf(errbuf, sizeof(errbuf),
"unable to get official name for remote machine %s",
RM);
return errbuf;
}
/*
* if the two hosts are not the same,
* then the printer must be remote.
*/
if (strcmp(name, hp->h_name) != 0)
sendtorem = 1;
}
return (char *)0;
}
#if __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
void
#if __STDC__
fatal(const char *msg, ...)
#else
fatal(msg, va_alist)
char *msg;
va_dcl
#endif
{
va_list ap;
#if __STDC__
va_start(ap, msg);
#else
va_start(ap);
#endif
if (from != host)
(void)printf("%s: ", host);
(void)printf("%s: ", name);
if (printer)
(void)printf("%s: ", printer);
(void)vprintf(msg, ap);
va_end(ap);
(void)putchar('\n');
exit(1);
}