7f72cbbae9
The removed files are no longer needed, they are actually labelled as ``Use only if you are not 4.4BSD''. (Yeah, the ol' crufty printcap.c is really gone!) Properly declare all external objects in files ending in .h, as opposed to embed them into files ending in .c.
314 lines
6.7 KiB
C
314 lines
6.7 KiB
C
/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1983, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)lpc.c 8.3 (Berkeley) 4/28/95";
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#endif /* not lint */
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#include <sys/param.h>
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#include <dirent.h>
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#include <signal.h>
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#include <setjmp.h>
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#include <syslog.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include <grp.h>
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#include <sys/param.h>
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#include "lp.h"
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#include "lpc.h"
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#include "extern.h"
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#ifndef LPR_OPER
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#define LPR_OPER "operator" /* group name of lpr operators */
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#endif
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/*
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* lpc -- line printer control program
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*/
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int fromatty;
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char cmdline[200];
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int margc;
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char *margv[20];
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int top;
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jmp_buf toplevel;
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static void cmdscanner __P((int));
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static struct cmd *getcmd __P((char *));
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static void intr __P((int));
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static void makeargv __P((void));
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static int ingroup __P((char *));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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register struct cmd *c;
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name = argv[0];
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openlog("lpd", 0, LOG_LPR);
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if (--argc > 0) {
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c = getcmd(*++argv);
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if (c == (struct cmd *)-1) {
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printf("?Ambiguous command\n");
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exit(1);
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}
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if (c == 0) {
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printf("?Invalid command\n");
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exit(1);
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}
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if (c->c_priv && getuid() && ingroup(LPR_OPER) == 0) {
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printf("?Privileged command\n");
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exit(1);
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}
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(*c->c_handler)(argc, argv);
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exit(0);
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}
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fromatty = isatty(fileno(stdin));
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top = setjmp(toplevel) == 0;
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if (top)
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signal(SIGINT, intr);
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for (;;) {
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cmdscanner(top);
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top = 1;
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}
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}
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static void
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intr(signo)
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int signo;
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{
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if (!fromatty)
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exit(0);
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longjmp(toplevel, 1);
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}
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/*
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* Command parser.
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*/
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static void
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cmdscanner(top)
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int top;
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{
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register struct cmd *c;
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if (!top)
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putchar('\n');
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for (;;) {
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if (fromatty) {
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printf("lpc> ");
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fflush(stdout);
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}
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if (fgets(cmdline, sizeof(cmdline), stdin) == 0)
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quit(0, NULL);
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if (cmdline[0] == 0 || cmdline[0] == '\n')
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break;
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makeargv();
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c = getcmd(margv[0]);
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if (c == (struct cmd *)-1) {
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printf("?Ambiguous command\n");
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continue;
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}
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if (c == 0) {
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printf("?Invalid command\n");
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continue;
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}
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if (c->c_priv && getuid() && ingroup(LPR_OPER) == 0) {
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printf("?Privileged command\n");
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continue;
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}
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(*c->c_handler)(margc, margv);
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}
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longjmp(toplevel, 0);
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}
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static struct cmd *
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getcmd(name)
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register char *name;
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{
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register char *p, *q;
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register struct cmd *c, *found;
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register int nmatches, longest;
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longest = 0;
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nmatches = 0;
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found = 0;
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for (c = cmdtab; p = c->c_name; c++) {
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for (q = name; *q == *p++; q++)
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if (*q == 0) /* exact match? */
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return(c);
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if (!*q) { /* the name was a prefix */
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if (q - name > longest) {
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longest = q - name;
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nmatches = 1;
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found = c;
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} else if (q - name == longest)
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nmatches++;
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}
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}
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if (nmatches > 1)
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return((struct cmd *)-1);
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return(found);
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}
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/*
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* Slice a string up into argc/argv.
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*/
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static void
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makeargv()
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{
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register char *cp;
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register char **argp = margv;
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margc = 0;
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for (cp = cmdline; *cp;) {
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while (isspace(*cp))
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cp++;
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if (*cp == '\0')
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break;
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*argp++ = cp;
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margc += 1;
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while (*cp != '\0' && !isspace(*cp))
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cp++;
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if (*cp == '\0')
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break;
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*cp++ = '\0';
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}
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*argp++ = 0;
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}
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#define HELPINDENT (sizeof ("directory"))
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/*
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* Help command.
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*/
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void
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help(argc, argv)
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int argc;
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char *argv[];
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{
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register struct cmd *c;
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if (argc == 1) {
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register int i, j, w;
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int columns, width = 0, lines;
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printf("Commands may be abbreviated. Commands are:\n\n");
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for (c = cmdtab; c->c_name; c++) {
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int len = strlen(c->c_name);
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if (len > width)
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width = len;
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}
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width = (width + 8) &~ 7;
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columns = 80 / width;
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if (columns == 0)
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columns = 1;
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lines = (NCMDS + columns - 1) / columns;
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for (i = 0; i < lines; i++) {
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for (j = 0; j < columns; j++) {
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c = cmdtab + j * lines + i;
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if (c->c_name)
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printf("%s", c->c_name);
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if (c + lines >= &cmdtab[NCMDS]) {
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printf("\n");
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break;
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}
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w = strlen(c->c_name);
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while (w < width) {
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w = (w + 8) &~ 7;
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putchar('\t');
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}
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}
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}
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return;
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}
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while (--argc > 0) {
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register char *arg;
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arg = *++argv;
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c = getcmd(arg);
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if (c == (struct cmd *)-1)
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printf("?Ambiguous help command %s\n", arg);
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else if (c == (struct cmd *)0)
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printf("?Invalid help command %s\n", arg);
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else
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printf("%-*s\t%s\n", HELPINDENT,
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c->c_name, c->c_help);
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}
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}
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/*
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* return non-zero if the user is a member of the given group
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*/
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static int
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ingroup(grname)
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char *grname;
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{
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static struct group *gptr=NULL;
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static gid_t groups[NGROUPS];
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register gid_t gid;
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register int i;
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if (gptr == NULL) {
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if ((gptr = getgrnam(grname)) == NULL) {
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fprintf(stderr, "Warning: unknown group '%s'\n",
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grname);
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return(0);
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}
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if (getgroups(NGROUPS, groups) < 0) {
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perror("getgroups");
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exit(1);
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}
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}
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gid = gptr->gr_gid;
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for (i = 0; i < NGROUPS; i++)
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if (gid == groups[i])
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return(1);
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return(0);
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}
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