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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/lpr/lpc/lpc.c	Lines:	0	114	0.0 %
Date:	2017-11-07	Branches:	0	92	0.0 %


/*	$OpenBSD: lpc.c,v 1.20 2016/03/16 15:41:11 krw Exp $	*/
/*	$NetBSD: lpc.c,v 1.11 2001/11/14 03:01:15 enami Exp $	*/

/*
 * 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. 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.
 */

#include <dirent.h>
#include <signal.h>
#include <syslog.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <ctype.h>
#include <string.h>
#include <grp.h>

#include "lp.h"
#include "lpc.h"
#include "extern.h"

#ifndef LPR_OPER
#define LPR_OPER	"operator"	/* group name of lpr operators */
#endif

/*
 * lpc -- line printer control program
 */

#define MAX_CMDLINE	200
#define MAX_MARGV	20
int	fromatty;

char	cmdline[MAX_CMDLINE];
int	margc;
char	*margv[MAX_MARGV];

static void		 cmdscanner(void);
static struct cmd	*getcmd(char *);
static void		 intr(int);
static void		 makeargv(void);
static int		 ingroup(char *);

int
main(int argc, char **argv)
{
	struct cmd *c;

	effective_uid = geteuid();
	real_uid = getuid();
	effective_gid = getegid();
	real_gid = getgid();
	PRIV_END;	/* be safe */

	openlog("lpc", 0, LOG_LPR);
	if (--argc > 0) {
		c = getcmd(*++argv);
		if (c == (struct cmd *)-1) {
			printf("?Ambiguous command\n");
			exit(1);
		}
		if (c == 0) {
			printf("?Invalid command\n");
			exit(1);
		}
		if (c->c_priv && real_uid && ingroup(LPR_OPER) == 0) {
			printf("?Privileged command\n");
			exit(1);
		}
		(*c->c_handler)(argc, argv);
		exit(0);
	}
	fromatty = isatty(fileno(stdin));
	signal(SIGINT, intr);
	for (;;)
		cmdscanner();
}

volatile sig_atomic_t gotintr;

static void
intr(int signo)
{
	if (!fromatty)
		_exit(0);
	gotintr = 1;
}

/*
 * Command parser.
 */
static void
cmdscanner(void)
{
	struct cmd *c;

	for (;;) {
		if (gotintr) {
			putchar('\n');
			gotintr = 0;
		}
		if (fromatty) {
			printf("lpc> ");
			fflush(stdout);
		}

		siginterrupt(SIGINT, 1);
		if (fgets(cmdline, MAX_CMDLINE, stdin) == NULL) {
			if (errno == EINTR && gotintr) {
				siginterrupt(SIGINT, 0);
				return;
			}
			siginterrupt(SIGINT, 0);
			quit(0, NULL);
		}
		siginterrupt(SIGINT, 0);

		makeargv();
		if (margc == 0)
			break;
		c = getcmd(margv[0]);
		if (c == (struct cmd *)-1) {
			printf("?Ambiguous command\n");
			continue;
		}
		if (c == 0) {
			printf("?Invalid command\n");
			continue;
		}
		if (c->c_priv && getuid() && ingroup(LPR_OPER) == 0) {
			printf("?Privileged command\n");
			continue;
		}
		(*c->c_handler)(margc, margv);
	}
}

static struct cmd *
getcmd(char *name)
{
	char *p, *q;
	struct cmd *c, *found;
	int nmatches, longest;

	longest = 0;
	nmatches = 0;
	found = 0;
	for (c = cmdtab; (p = c->c_name) != NULL; c++) {
		for (q = name; *q == *p++; q++)
			if (*q == 0)		/* exact match? */
				return(c);
		if (!*q) {			/* the name was a prefix */
			if (q - name > longest) {
				longest = q - name;
				nmatches = 1;
				found = c;
			} else if (q - name == longest)
				nmatches++;
		}
	}
	if (nmatches > 1)
		return((struct cmd *)-1);
	return(found);
}

/*
 * Slice a string up into argc/argv.
 */
static void
makeargv(void)
{
	char *cp = cmdline;
	char **ap = margv;

	margc = 0;
	while (margc < MAX_MARGV - 1 && (*ap = strsep(&cp, " \t\n")) != NULL) {
		if (**ap != '\0') {
			ap++;
			margc++;
		}
	}
	*ap = NULL;
}

#define HELPINDENT ((int)sizeof("directory"))

/*
 * Help command.
 */
void
help(int argc, char **argv)
{
	struct cmd *c;

	if (argc == 1) {
		int i, j, w;
		int columns, width = 0, lines;

		printf("Commands may be abbreviated.  Commands are:\n\n");
		for (c = cmdtab; c->c_name; c++) {
			int len = strlen(c->c_name);

			if (len > width)
				width = len;
		}
		width = (width + 8) &~ 7;
		columns = 80 / width;
		if (columns == 0)
			columns = 1;
		lines = (NCMDS + columns - 1) / columns;
		for (i = 0; i < lines; i++) {
			for (j = 0; j < columns; j++) {
				c = cmdtab + j * lines + i;
				if (c->c_name)
					printf("%s", c->c_name);
				if (c + lines >= &cmdtab[NCMDS]) {
					printf("\n");
					break;
				}
				w = strlen(c->c_name);
				while (w < width) {
					w = (w + 8) &~ 7;
					putchar('\t');
				}
			}
		}
		return;
	}
	while (--argc > 0) {
		char *arg;

		arg = *++argv;
		c = getcmd(arg);
		if (c == (struct cmd *)-1)
			printf("?Ambiguous help command %s\n", arg);
		else if (c == NULL)
			printf("?Invalid help command %s\n", arg);
		else
			printf("%-*s\t%s\n", HELPINDENT,
				c->c_name, c->c_help);
	}
}

/*
 * return non-zero if the user is a member of the given group
 */
static int
ingroup(char *grname)
{
	static struct group *gptr = NULL;
	static gid_t groups[NGROUPS_MAX];
	static int ngroups;
	gid_t gid;
	int i;

	if (gptr == NULL) {
		if ((gptr = getgrnam(grname)) == NULL) {
			warnx("Warning: unknown group `%s'", grname);
			return(0);
		}
		if ((ngroups = getgroups(NGROUPS_MAX, groups)) < 0)
			err(1, "getgroups");
	}
	gid = gptr->gr_gid;
	for (i = 0; i < ngroups; i++)
		if (gid == groups[i])
			return(1);
	return(0);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: lpc.c,v 1.20 2016/03/16 15:41:11 krw Exp $ */
2			/* $NetBSD: lpc.c,v 1.11 2001/11/14 03:01:15 enami Exp $ */
3
4			/*
5			* Copyright (c) 1983, 1993
6			* The Regents of the University of California. All rights reserved.
7			*
8			*
9			* Redistribution and use in source and binary forms, with or without
10			* modification, are permitted provided that the following conditions
11			* are met:
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			* 2. Redistributions in binary form must reproduce the above copyright
15			* notice, this list of conditions and the following disclaimer in the
16			* documentation and/or other materials provided with the distribution.
17			* 3. Neither the name of the University nor the names of its contributors
18			* may be used to endorse or promote products derived from this software
19			* without specific prior written permission.
20			*
21			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31			* SUCH DAMAGE.
32			*/
33
34			#include <dirent.h>
35			#include <signal.h>
36			#include <syslog.h>
37			#include <unistd.h>
38			#include <stdlib.h>
39			#include <stdio.h>
40			#include <err.h>
41			#include <errno.h>
42			#include <limits.h>
43			#include <ctype.h>
44			#include <string.h>
45			#include <grp.h>
46
47			#include "lp.h"
48			#include "lpc.h"
49			#include "extern.h"
50
51			#ifndef LPR_OPER
52			#define LPR_OPER "operator" /* group name of lpr operators */
53			#endif
54
55			/*
56			* lpc -- line printer control program
57			*/
58
59			#define MAX_CMDLINE 200
60			#define MAX_MARGV 20
61			int fromatty;
62
63			char cmdline[MAX_CMDLINE];
64			int margc;
65			char *margv[MAX_MARGV];
66
67			static void cmdscanner(void);
68			static struct cmd getcmd(char );
69			static void intr(int);
70			static void makeargv(void);
71			static int ingroup(char *);
72
73			int
74			main(int argc, char **argv)
75			{
76			struct cmd *c;
77
78			effective_uid = geteuid();
79			real_uid = getuid();
80			effective_gid = getegid();
81			real_gid = getgid();
82			PRIV_END; /* be safe */
83
84			openlog("lpc", 0, LOG_LPR);
85			if (--argc > 0) {
86			c = getcmd(*++argv);
87			if (c == (struct cmd *)-1) {
88			printf("?Ambiguous command\n");
89			exit(1);
90			}
91			if (c == 0) {
92			printf("?Invalid command\n");
93			exit(1);
94			}
95			if (c->c_priv && real_uid && ingroup(LPR_OPER) == 0) {
96			printf("?Privileged command\n");
97			exit(1);
98			}
99			(*c->c_handler)(argc, argv);
100			exit(0);
101			}
102			fromatty = isatty(fileno(stdin));
103			signal(SIGINT, intr);
104			for (;;)
105			cmdscanner();
106			}
107
108			volatile sig_atomic_t gotintr;
109
110			static void
111			intr(int signo)
112			{
113			if (!fromatty)
114			_exit(0);
115			gotintr = 1;
116			}
117
118			/*
119			* Command parser.
120			*/
121			static void
122			cmdscanner(void)
123			{
124			struct cmd *c;
125
126			for (;;) {
127			if (gotintr) {
128			putchar('\n');
129			gotintr = 0;
130			}
131			if (fromatty) {
132			printf("lpc> ");
133			fflush(stdout);
134			}
135
136			siginterrupt(SIGINT, 1);
137			if (fgets(cmdline, MAX_CMDLINE, stdin) == NULL) {
138			if (errno == EINTR && gotintr) {
139			siginterrupt(SIGINT, 0);
140			return;
141			}
142			siginterrupt(SIGINT, 0);
143			quit(0, NULL);
144			}
145			siginterrupt(SIGINT, 0);
146
147			makeargv();
148			if (margc == 0)
149			break;
150			c = getcmd(margv[0]);
151			if (c == (struct cmd *)-1) {
152			printf("?Ambiguous command\n");
153			continue;
154			}
155			if (c == 0) {
156			printf("?Invalid command\n");
157			continue;
158			}
159			if (c->c_priv && getuid() && ingroup(LPR_OPER) == 0) {
160			printf("?Privileged command\n");
161			continue;
162			}
163			(*c->c_handler)(margc, margv);
164			}
165			}
166
167			static struct cmd *
168			getcmd(char *name)
169			{
170			char p, q;
171			struct cmd c, found;
172			int nmatches, longest;
173
174			longest = 0;
175			nmatches = 0;
176			found = 0;
177			for (c = cmdtab; (p = c->c_name) != NULL; c++) {
178			for (q = name; q == p++; q++)
179			if (q == 0) / exact match? */
180			return(c);
181			if (!q) { / the name was a prefix */
182			if (q - name > longest) {
183			longest = q - name;
184			nmatches = 1;
185			found = c;
186			} else if (q - name == longest)
187			nmatches++;
188			}
189			}
190			if (nmatches > 1)
191			return((struct cmd *)-1);
192			return(found);
193			}
194
195			/*
196			* Slice a string up into argc/argv.
197			*/
198			static void
199			makeargv(void)
200			{
201			char *cp = cmdline;
202			char **ap = margv;
203
204			margc = 0;
205			while (margc < MAX_MARGV - 1 && (*ap = strsep(&cp, " \t\n")) != NULL) {
206			if (**ap != '\0') {
207			ap++;
208			margc++;
209			}
210			}
211			*ap = NULL;
212			}
213
214			#define HELPINDENT ((int)sizeof("directory"))
215
216			/*
217			* Help command.
218			*/
219			void
220			help(int argc, char **argv)
221			{
222			struct cmd *c;
223
224			if (argc == 1) {
225			int i, j, w;
226			int columns, width = 0, lines;
227
228			printf("Commands may be abbreviated. Commands are:\n\n");
229			for (c = cmdtab; c->c_name; c++) {
230			int len = strlen(c->c_name);
231
232			if (len > width)
233			width = len;
234			}
235			width = (width + 8) &~ 7;
236			columns = 80 / width;
237			if (columns == 0)
238			columns = 1;
239			lines = (NCMDS + columns - 1) / columns;
240			for (i = 0; i < lines; i++) {
241			for (j = 0; j < columns; j++) {
242			c = cmdtab + j * lines + i;
243			if (c->c_name)
244			printf("%s", c->c_name);
245			if (c + lines >= &cmdtab[NCMDS]) {
246			printf("\n");
247			break;
248			}
249			w = strlen(c->c_name);
250			while (w < width) {
251			w = (w + 8) &~ 7;
252			putchar('\t');
253			}
254			}
255			}
256			return;
257			}
258			while (--argc > 0) {
259			char *arg;
260
261			arg = *++argv;
262			c = getcmd(arg);
263			if (c == (struct cmd *)-1)
264			printf("?Ambiguous help command %s\n", arg);
265			else if (c == NULL)
266			printf("?Invalid help command %s\n", arg);
267			else
268			printf("%-*s\t%s\n", HELPINDENT,
269			c->c_name, c->c_help);
270			}
271			}
272
273			/*
274			* return non-zero if the user is a member of the given group
275			*/
276			static int
277			ingroup(char *grname)
278			{
279			static struct group *gptr = NULL;
280			static gid_t groups[NGROUPS_MAX];
281			static int ngroups;
282			gid_t gid;
283			int i;
284
285			if (gptr == NULL) {
286			if ((gptr = getgrnam(grname)) == NULL) {
287			warnx("Warning: unknown group `%s'", grname);
288			return(0);
289			}
290			if ((ngroups = getgroups(NGROUPS_MAX, groups)) < 0)
291			err(1, "getgroups");
292			}
293			gid = gptr->gr_gid;
294			for (i = 0; i < ngroups; i++)
295			if (gid == groups[i])
296			return(1);
297			return(0);
298			}