Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/syslogc/syslogc.c	Lines:	49	72	68.1 %
Date:	2017-11-13	Branches:	34	49	69.4 %


/* $OpenBSD: syslogc.c,v 1.18 2015/10/13 16:30:55 deraadt Exp $ */

/*
 * Copyright (c) 2004 Damien Miller
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>

#include <err.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define DEFAULT_CTLSOCK		"/var/run/syslogd.sock"

#define MAX_MEMBUF_NAME	64	/* Max length of membuf log name */

/*
 * Client protocol NB. all numeric fields in network byte order
 */
#define CTL_VERSION		2

/* Request */
struct ctl_cmd {
	u_int32_t	version;
#define CMD_READ	1	/* Read out log */
#define CMD_READ_CLEAR	2	/* Read and clear log */
#define CMD_CLEAR	3	/* Clear log */
#define CMD_LIST	4	/* List available logs */
#define CMD_FLAGS	5	/* Query flags only */
#define CMD_READ_CONT	6	/* Read out log continuously */
	u_int32_t	cmd;
	u_int32_t	lines;
	char		logname[MAX_MEMBUF_NAME];
};

/* Reply */
struct ctl_reply_hdr {
	u_int32_t	version;
#define CTL_HDR_FLAG_OVERFLOW	0x01
	u_int32_t	flags;
	/* Reply text follows, up to MAX_MEMBUF long */
};

static void
usage(void)
{
	extern char *__progname;

	fprintf(stderr,
	    "usage: %s [-Ccfo] [-n lines] [-s reporting_socket] logname\n"
	    "       %s -q\n", __progname, __progname);
	exit(1);
}

int
main(int argc, char **argv)
{
	const char *ctlsock_path;
	char buf[8192];
	struct sockaddr_un ctl;
	int ctlsock, ch, oflag, rval;
	FILE *ctlf;
	extern char *optarg;
	extern int optind;
	struct ctl_cmd cc;
	struct ctl_reply_hdr rr;
	const char *errstr;

	memset(&cc, '\0', sizeof(cc));

	ctlsock_path = DEFAULT_CTLSOCK;
	rval = oflag = 0;
	while ((ch = getopt(argc, argv, "Ccfhon:qs:")) != -1) {
		switch (ch) {
		case 'C':
			cc.cmd = CMD_CLEAR;
			break;
		case 'c':
			cc.cmd = CMD_READ_CLEAR;
			break;
		case 'h':
			usage();
			break;
		case 'f':
			cc.cmd = CMD_READ_CONT;
			break;
		case 'n':
			cc.lines = strtonum(optarg, 1, UINT32_MAX, &errstr);
			if (errstr)
				errx(1, "number of lines is %s: %s",
				    errstr, optarg);
			break;
		case 'o':
			cc.cmd = CMD_FLAGS;
			oflag = 1;
			break;
		case 'q':
			cc.cmd = CMD_LIST;
			break;
		case 's':
			ctlsock_path = optarg;
			break;
		default:
			usage();
			break;
		}
	}

	if (cc.cmd == 0)
		cc.cmd = CMD_READ;

	if ((cc.cmd != CMD_LIST && optind != argc - 1) ||
	    (cc.cmd == CMD_LIST && optind != argc))
		usage();

	if (cc.cmd != CMD_LIST) {
		if (strlcpy(cc.logname, argv[optind], sizeof(cc.logname)) >=
		    sizeof(cc.logname))
			errx(1, "Specified log name is too long");
	}

	memset(&ctl, '\0', sizeof(ctl));
	strlcpy(ctl.sun_path, ctlsock_path, sizeof(ctl.sun_path));
	ctl.sun_family = AF_UNIX;

	if ((ctlsock = socket(PF_UNIX, SOCK_STREAM, 0)) == -1)
		err(1, "socket");
	if (connect(ctlsock, (struct sockaddr *)&ctl, sizeof(ctl)) == -1)
		err(1, "connect: %s", ctl.sun_path);
	if ((ctlf = fdopen(ctlsock, "r+")) == NULL)
		err(1, "fdopen");

	if (pledge("stdio flock rpath cpath wpath", NULL) == -1)
		err(1, "stdio");

	cc.version = htonl(CTL_VERSION);
	cc.cmd = htonl(cc.cmd);
	/* Send command */
	if (fwrite(&cc, sizeof(cc), 1, ctlf) != 1)
		err(1, "fwrite");

	fflush(ctlf);
	setvbuf(ctlf, NULL, _IOLBF, 0);
	setvbuf(stdout, NULL, _IOLBF, 0);

	/* Fetch header */
	if (fread(&rr, sizeof(rr), 1, ctlf) != 1)
		err(1, "fread header");

	if (ntohl(rr.version) != CTL_VERSION)
		errx(1, "unsupported syslogd version");

	/* Write out reply */
	while ((fgets(buf, sizeof(buf), ctlf)) != NULL) {
		if (!strcmp(buf, "<ENOBUFS>\n"))
			fprintf(stderr, "syslogc [%s]: Lines were dropped!\n",
			    cc.logname);
		else
			fputs(buf, stdout);
	}

	if (oflag && (ntohl(rr.flags) & CTL_HDR_FLAG_OVERFLOW)) {
		printf("%s has overflowed\n", cc.logname);
		rval = 1;
	}

	fclose(ctlf);
	close(ctlsock);

	exit(rval);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: syslogc.c,v 1.18 2015/10/13 16:30:55 deraadt Exp $ */
2
3			/*
4			* Copyright (c) 2004 Damien Miller
5			*
6			* Permission to use, copy, modify, and distribute this software for any
7			* purpose with or without fee is hereby granted, provided that the above
8			* copyright notice and this permission notice appear in all copies.
9			*
10			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18
19			#include <sys/types.h>
20			#include <sys/socket.h>
21			#include <sys/un.h>
22
23			#include <err.h>
24			#include <stdio.h>
25			#include <stdint.h>
26			#include <stdlib.h>
27			#include <string.h>
28			#include <unistd.h>
29
30			#define DEFAULT_CTLSOCK "/var/run/syslogd.sock"
31
32			#define MAX_MEMBUF_NAME 64 /* Max length of membuf log name */
33
34			/*
35			* Client protocol NB. all numeric fields in network byte order
36			*/
37			#define CTL_VERSION 2
38
39			/* Request */
40			struct ctl_cmd {
41			u_int32_t version;
42			#define CMD_READ 1 /* Read out log */
43			#define CMD_READ_CLEAR 2 /* Read and clear log */
44			#define CMD_CLEAR 3 /* Clear log */
45			#define CMD_LIST 4 /* List available logs */
46			#define CMD_FLAGS 5 /* Query flags only */
47			#define CMD_READ_CONT 6 /* Read out log continuously */
48			u_int32_t cmd;
49			u_int32_t lines;
50			char logname[MAX_MEMBUF_NAME];
51			};
52
53			/* Reply */
54			struct ctl_reply_hdr {
55			u_int32_t version;
56			#define CTL_HDR_FLAG_OVERFLOW 0x01
57			u_int32_t flags;
58			/* Reply text follows, up to MAX_MEMBUF long */
59			};
60
61			static void
62			usage(void)
63			{
64			extern char *__progname;
65
66			fprintf(stderr,
67			"usage: %s [-Ccfo] [-n lines] [-s reporting_socket] logname\n"
68			" %s -q\n", __progname, __progname);
69			exit(1);
70			}
71
72			int
73			main(int argc, char **argv)
74			{
75			const char *ctlsock_path;
76		136	char buf[8192];
77		68	struct sockaddr_un ctl;
78			int ctlsock, ch, oflag, rval;
79			FILE *ctlf;
80			extern char *optarg;
81			extern int optind;
82		68	struct ctl_cmd cc;
83		68	struct ctl_reply_hdr rr;
84		68	const char *errstr;
85
86		68	memset(&cc, '\0', sizeof(cc));
87
88			ctlsock_path = DEFAULT_CTLSOCK;
89			rval = oflag = 0;
90	✓✓	360	while ((ch = getopt(argc, argv, "Ccfhon:qs:")) != -1) {
91	✓✓✗✓ ✗✓✓✓ ✗	112	switch (ch) {
92			case 'C':
93		4	cc.cmd = CMD_CLEAR;
94		4	break;
95			case 'c':
96		8	cc.cmd = CMD_READ_CLEAR;
97		8	break;
98			case 'h':
99			usage();
100			break;
101			case 'f':
102		8	cc.cmd = CMD_READ_CONT;
103		8	break;
104			case 'n':
105			cc.lines = strtonum(optarg, 1, UINT32_MAX, &errstr);
106			if (errstr)
107			errx(1, "number of lines is %s: %s",
108			errstr, optarg);
109			break;
110			case 'o':
111		8	cc.cmd = CMD_FLAGS;
112			oflag = 1;
113		8	break;
114			case 'q':
115		16	cc.cmd = CMD_LIST;
116		16	break;
117			case 's':
118		68	ctlsock_path = optarg;
119		68	break;
120			default:
121			usage();
122			break;
123			}
124			}
125
126	✓✓	68	if (cc.cmd == 0)
127		24	cc.cmd = CMD_READ;
128
129	✓✓✓✗ ✗✓	136	if ((cc.cmd != CMD_LIST && optind != argc - 1) \|\|
130	✓✓	84	(cc.cmd == CMD_LIST && optind != argc))
131			usage();
132
133	✓✓	68	if (cc.cmd != CMD_LIST) {
134	✗✓	52	if (strlcpy(cc.logname, argv[optind], sizeof(cc.logname)) >=
135			sizeof(cc.logname))
136			errx(1, "Specified log name is too long");
137			}
138
139		68	memset(&ctl, '\0', sizeof(ctl));
140		68	strlcpy(ctl.sun_path, ctlsock_path, sizeof(ctl.sun_path));
141		68	ctl.sun_family = AF_UNIX;
142
143	✗✓	68	if ((ctlsock = socket(PF_UNIX, SOCK_STREAM, 0)) == -1)
144			err(1, "socket");
145	✗✓	68	if (connect(ctlsock, (struct sockaddr *)&ctl, sizeof(ctl)) == -1)
146			err(1, "connect: %s", ctl.sun_path);
147	✗✓	68	if ((ctlf = fdopen(ctlsock, "r+")) == NULL)
148			err(1, "fdopen");
149
150	✗✓	68	if (pledge("stdio flock rpath cpath wpath", NULL) == -1)
151			err(1, "stdio");
152
153		68	cc.version = htonl(CTL_VERSION);
154		68	cc.cmd = htonl(cc.cmd);
155			/* Send command */
156	✗✓	68	if (fwrite(&cc, sizeof(cc), 1, ctlf) != 1)
157			err(1, "fwrite");
158
159		68	fflush(ctlf);
160		68	setvbuf(ctlf, NULL, _IOLBF, 0);
161		68	setvbuf(stdout, NULL, _IOLBF, 0);
162
163			/* Fetch header */
164	✗✓	68	if (fread(&rr, sizeof(rr), 1, ctlf) != 1)
165			err(1, "fread header");
166
167	✗✓	68	if (ntohl(rr.version) != CTL_VERSION)
168			errx(1, "unsupported syslogd version");
169
170			/* Write out reply */
171	✓✓	1624	while ((fgets(buf, sizeof(buf), ctlf)) != NULL) {
172	✓✓	744	if (!strcmp(buf, "<ENOBUFS>\n"))
173		4	fprintf(stderr, "syslogc [%s]: Lines were dropped!\n",
174		4	cc.logname);
175			else
176		740	fputs(buf, stdout);
177			}
178
179	✓✓✓✓	76	if (oflag && (ntohl(rr.flags) & CTL_HDR_FLAG_OVERFLOW)) {
180		4	printf("%s has overflowed\n", cc.logname);
181			rval = 1;
182		4	}
183
184			fclose(ctlf);
185			close(ctlsock);
186
187			exit(rval);
188			}