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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	libexec/ftpd/popen.c	Lines:	0	71	0.0 %
Date:	2017-11-07	Branches:	0	49	0.0 %


/*	$OpenBSD: popen.c,v 1.26 2016/02/29 17:50:34 jca Exp $	*/
/*	$NetBSD: popen.c,v 1.5 1995/04/11 02:45:00 cgd Exp $	*/

/*
 * Copyright (c) 1988, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software written by Ken Arnold and
 * published in UNIX Review, Vol. 6, No. 8.
 *
 * 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 <sys/types.h>
#include <sys/wait.h>

#include <errno.h>
#include <glob.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>

#include <netinet/in.h>

#include "monitor.h"
#include "extern.h"

/*
 * Special version of popen which avoids call to shell.  This ensures noone
 * may create a pipe to a hidden program as a side effect of a list or dir
 * command.
 */
#define MAX_ARGV	100
#define MAX_GARGV	1000

FILE *
ftpd_popen(char *program, char *type, pid_t *pidptr)
{
	char *cp;
	FILE *iop;
	int argc, gargc, pdes[2];
	pid_t pid;
	char **pop, *argv[MAX_ARGV], *gargv[MAX_GARGV];

	if ((*type != 'r' && *type != 'w') || type[1])
		return (NULL);

	if (pipe(pdes) < 0)
		return (NULL);

	/* break up string into pieces */
	for (argc = 0, cp = program;argc < MAX_ARGV-1; cp = NULL)
		if (!(argv[argc++] = strtok(cp, " \t\n")))
			break;
	argv[MAX_ARGV-1] = NULL;

	/* glob each piece */
	gargv[0] = argv[0];
	for (gargc = argc = 1; argv[argc]; argc++) {
		glob_t gl;

		memset(&gl, 0, sizeof(gl));
		if (glob(argv[argc],
		    GLOB_BRACE|GLOB_NOCHECK|GLOB_QUOTE|GLOB_TILDE|GLOB_LIMIT,
		    NULL, &gl)) {
			if (gargc < MAX_GARGV-1) {
				gargv[gargc++] = strdup(argv[argc]);
				if (gargv[gargc -1] == NULL)
					fatal ("Out of memory.");
			}

		} else if (gl.gl_pathc > 0) {
			for (pop = gl.gl_pathv; *pop && gargc < MAX_GARGV-1; pop++) {
				gargv[gargc++] = strdup(*pop);
				if (gargv[gargc - 1] == NULL)
					fatal ("Out of memory.");
			}
		}
		globfree(&gl);
	}
	gargv[gargc] = NULL;

	iop = NULL;

	switch (pid = fork()) {
	case -1:			/* error */
		(void)close(pdes[0]);
		(void)close(pdes[1]);
		goto pfree;
		/* NOTREACHED */
	case 0:				/* child */
		if (*type == 'r') {
			if (pdes[1] != STDOUT_FILENO) {
				dup2(pdes[1], STDOUT_FILENO);
				(void)close(pdes[1]);
			}
			dup2(STDOUT_FILENO, STDERR_FILENO); /* stderr too! */
			(void)close(pdes[0]);
		} else {
			if (pdes[0] != STDIN_FILENO) {
				dup2(pdes[0], STDIN_FILENO);
				(void)close(pdes[0]);
			}
			(void)close(pdes[1]);
		}
		closelog();

		if (strcmp(gargv[0], "/bin/ls") == 0) {
			extern int optreset;
			extern int ls_main(int, char **);

			/* reset getopt for ls_main */
			optreset = optind = 1;
			exit(ls_main(gargc, gargv));
		}

		execv(gargv[0], gargv);
		_exit(1);
	}
	/* parent; assume fdopen can't fail...  */
	if (*type == 'r') {
		iop = fdopen(pdes[0], type);
		(void)close(pdes[1]);
	} else {
		iop = fdopen(pdes[1], type);
		(void)close(pdes[0]);
	}
	*pidptr = pid;

pfree:	for (argc = 1; gargv[argc] != NULL; argc++)
		free(gargv[argc]);

	return (iop);
}

int
ftpd_pclose(FILE *iop, pid_t pid)
{
	int status;
	pid_t rv;
	sigset_t sigset, osigset;

	(void)fclose(iop);
	sigemptyset(&sigset);
	sigaddset(&sigset, SIGINT);
	sigaddset(&sigset, SIGQUIT);
	sigaddset(&sigset, SIGHUP);
	sigprocmask(SIG_BLOCK, &sigset, &osigset);
	while ((rv = waitpid(pid, &status, 0)) < 0 && errno == EINTR)
		continue;
	sigprocmask(SIG_SETMASK, &osigset, NULL);
	if (rv < 0)
		return (-1);
	if (WIFEXITED(status))
		return (WEXITSTATUS(status));
	return (1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: popen.c,v 1.26 2016/02/29 17:50:34 jca Exp $ */
2			/* $NetBSD: popen.c,v 1.5 1995/04/11 02:45:00 cgd Exp $ */
3
4			/*
5			* Copyright (c) 1988, 1993, 1994
6			* The Regents of the University of California. All rights reserved.
7			*
8			* This code is derived from software written by Ken Arnold and
9			* published in UNIX Review, Vol. 6, No. 8.
10			*
11			* Redistribution and use in source and binary forms, with or without
12			* modification, are permitted provided that the following conditions
13			* are met:
14			* 1. Redistributions of source code must retain the above copyright
15			* notice, this list of conditions and the following disclaimer.
16			* 2. Redistributions in binary form must reproduce the above copyright
17			* notice, this list of conditions and the following disclaimer in the
18			* documentation and/or other materials provided with the distribution.
19			* 3. Neither the name of the University nor the names of its contributors
20			* may be used to endorse or promote products derived from this software
21			* without specific prior written permission.
22			*
23			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33			* SUCH DAMAGE.
34			*
35			*/
36
37			#include <sys/types.h>
38			#include <sys/wait.h>
39
40			#include <errno.h>
41			#include <glob.h>
42			#include <signal.h>
43			#include <stdio.h>
44			#include <stdlib.h>
45			#include <string.h>
46			#include <syslog.h>
47			#include <unistd.h>
48
49			#include <netinet/in.h>
50
51			#include "monitor.h"
52			#include "extern.h"
53
54			/*
55			* Special version of popen which avoids call to shell. This ensures noone
56			* may create a pipe to a hidden program as a side effect of a list or dir
57			* command.
58			*/
59			#define MAX_ARGV 100
60			#define MAX_GARGV 1000
61
62			FILE *
63			ftpd_popen(char program, char type, pid_t *pidptr)
64			{
65			char *cp;
66			FILE *iop;
67			int argc, gargc, pdes[2];
68			pid_t pid;
69			char *pop, argv[MAX_ARGV], *gargv[MAX_GARGV];
70
71			if ((type != 'r' && type != 'w') \|\| type[1])
72			return (NULL);
73
74			if (pipe(pdes) < 0)
75			return (NULL);
76
77			/* break up string into pieces */
78			for (argc = 0, cp = program;argc < MAX_ARGV-1; cp = NULL)
79			if (!(argv[argc++] = strtok(cp, " \t\n")))
80			break;
81			argv[MAX_ARGV-1] = NULL;
82
83			/* glob each piece */
84			gargv[0] = argv[0];
85			for (gargc = argc = 1; argv[argc]; argc++) {
86			glob_t gl;
87
88			memset(&gl, 0, sizeof(gl));
89			if (glob(argv[argc],
90			GLOB_BRACE\|GLOB_NOCHECK\|GLOB_QUOTE\|GLOB_TILDE\|GLOB_LIMIT,
91			NULL, &gl)) {
92			if (gargc < MAX_GARGV-1) {
93			gargv[gargc++] = strdup(argv[argc]);
94			if (gargv[gargc -1] == NULL)
95			fatal ("Out of memory.");
96			}
97
98			} else if (gl.gl_pathc > 0) {
99			for (pop = gl.gl_pathv; *pop && gargc < MAX_GARGV-1; pop++) {
100			gargv[gargc++] = strdup(*pop);
101			if (gargv[gargc - 1] == NULL)
102			fatal ("Out of memory.");
103			}
104			}
105			globfree(&gl);
106			}
107			gargv[gargc] = NULL;
108
109			iop = NULL;
110
111			switch (pid = fork()) {
112			case -1: /* error */
113			(void)close(pdes[0]);
114			(void)close(pdes[1]);
115			goto pfree;
116			/* NOTREACHED */
117			case 0: /* child */
118			if (*type == 'r') {
119			if (pdes[1] != STDOUT_FILENO) {
120			dup2(pdes[1], STDOUT_FILENO);
121			(void)close(pdes[1]);
122			}
123			dup2(STDOUT_FILENO, STDERR_FILENO); /* stderr too! */
124			(void)close(pdes[0]);
125			} else {
126			if (pdes[0] != STDIN_FILENO) {
127			dup2(pdes[0], STDIN_FILENO);
128			(void)close(pdes[0]);
129			}
130			(void)close(pdes[1]);
131			}
132			closelog();
133
134			if (strcmp(gargv[0], "/bin/ls") == 0) {
135			extern int optreset;
136			extern int ls_main(int, char **);
137
138			/* reset getopt for ls_main */
139			optreset = optind = 1;
140			exit(ls_main(gargc, gargv));
141			}
142
143			execv(gargv[0], gargv);
144			_exit(1);
145			}
146			/* parent; assume fdopen can't fail... */
147			if (*type == 'r') {
148			iop = fdopen(pdes[0], type);
149			(void)close(pdes[1]);
150			} else {
151			iop = fdopen(pdes[1], type);
152			(void)close(pdes[0]);
153			}
154			*pidptr = pid;
155
156			pfree: for (argc = 1; gargv[argc] != NULL; argc++)
157			free(gargv[argc]);
158
159			return (iop);
160			}
161
162			int
163			ftpd_pclose(FILE *iop, pid_t pid)
164			{
165			int status;
166			pid_t rv;
167			sigset_t sigset, osigset;
168
169			(void)fclose(iop);
170			sigemptyset(&sigset);
171			sigaddset(&sigset, SIGINT);
172			sigaddset(&sigset, SIGQUIT);
173			sigaddset(&sigset, SIGHUP);
174			sigprocmask(SIG_BLOCK, &sigset, &osigset);
175			while ((rv = waitpid(pid, &status, 0)) < 0 && errno == EINTR)
176			continue;
177			sigprocmask(SIG_SETMASK, &osigset, NULL);
178			if (rv < 0)
179			return (-1);
180			if (WIFEXITED(status))
181			return (WEXITSTATUS(status));
182			return (1);
183			}