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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/gen/syslog_r.c	Lines:	49	83	59.0 %
Date:	2017-11-07	Branches:	24	54	44.4 %


/*	$OpenBSD: syslog_r.c,v 1.19 2017/08/08 14:23:23 bluhm Exp $ */
/*
 * Copyright (c) 1983, 1988, 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 <sys/types.h>
#include <sys/uio.h>
#include <netdb.h>

#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <time.h>
#include <unistd.h>
#include <limits.h>
#include <stdarg.h>

/* Reentrant version of syslog, i.e. syslog_r() */
void
syslog_r(int pri, struct syslog_data *data, const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	vsyslog_r(pri, data, fmt, ap);
	va_end(ap);
}
DEF_WEAK(syslog_r);

void
vsyslog_r(int pri, struct syslog_data *data, const char *fmt, va_list ap)
{
	__vsyslog_r(pri, data, 1, fmt, ap);
}
DEF_WEAK(vsyslog_r);

/*
 * This is used by both syslog_r and syslog.
 */
void
__vsyslog_r(int pri, struct syslog_data *data,
    int reentrant, const char *fmt, va_list ap)
{
	int cnt;
	char ch, *p, *t;
	int saved_errno;
#define	TBUF_SIZE	(LOG_MAXLINE+1)
#define	FMT_SIZE	(1024+1)
	char *stdp = NULL, tbuf[TBUF_SIZE], fmt_cpy[FMT_SIZE];
	int tbuf_left, fmt_left, prlen;

#define	INTERNALLOG	LOG_ERR|LOG_CONS|LOG_PERROR|LOG_PID
	/* Check for invalid bits. */
	if (pri & ~(LOG_PRIMASK|LOG_FACMASK)) {
		syslog_r(INTERNALLOG, data,
		    "syslog%s: unknown facility/priority: %x",
		    reentrant ? "_r" : "", pri);
		pri &= LOG_PRIMASK|LOG_FACMASK;
	}

	/* Check priority against setlogmask values. */
	if (!(LOG_MASK(LOG_PRI(pri)) & data->log_mask))
		return;

	saved_errno = errno;

	/* Set default facility if none specified. */
	if ((pri & LOG_FACMASK) == 0)
		pri |= data->log_fac;

	p = tbuf;
	tbuf_left = TBUF_SIZE;

#define	DEC()	\
	do {					\
		if (prlen < 0)			\
			prlen = 0;		\
		if (prlen >= tbuf_left)		\
			prlen = tbuf_left - 1;	\
		p += prlen;			\
		tbuf_left -= prlen;		\
	} while (0)

	prlen = snprintf(p, tbuf_left, "<%d>", pri);
	DEC();

	if (data->log_stat & LOG_PERROR)
		stdp = p;
	if (data->log_tag == NULL)
		data->log_tag = __progname;
	if (data->log_tag != NULL) {
		prlen = snprintf(p, tbuf_left, "%.*s", NAME_MAX, data->log_tag);
		DEC();
	}
	if (data->log_stat & LOG_PID) {
		prlen = snprintf(p, tbuf_left, "[%ld]", (long)getpid());
		DEC();
	}
	if (data->log_tag != NULL) {
		if (tbuf_left > 1) {
			*p++ = ':';
			tbuf_left--;
		}
		if (tbuf_left > 1) {
			*p++ = ' ';
			tbuf_left--;
		}
	}

	for (t = fmt_cpy, fmt_left = FMT_SIZE;
	    (ch = *fmt) != '\0' && fmt_left > 1;
	    ++fmt) {
		if (ch == '%' && fmt[1] == 'm') {
			char ebuf[NL_TEXTMAX];

			++fmt;
			(void)strerror_r(saved_errno, ebuf, sizeof(ebuf));
			prlen = snprintf(t, fmt_left, "%s", ebuf);
			if (prlen < 0)
				prlen = 0;
			if (prlen >= fmt_left)
				prlen = fmt_left - 1;
			t += prlen;
			fmt_left -= prlen;
		} else if (ch == '%' && fmt[1] == '%' && fmt_left > 2) {
			++fmt;
			*t++ = '%';
			*t++ = '%';
			fmt_left -= 2;
		} else {
			*t++ = ch;
			fmt_left--;
		}
	}
	*t = '\0';

	prlen = vsnprintf(p, tbuf_left, fmt_cpy, ap);
	DEC();
	cnt = p - tbuf;
	while (cnt > 0 && p[-1] == '\n') {
		*(--p) = '\0';
		--cnt;
	}

	/* Output to stderr if requested. */
	if (data->log_stat & LOG_PERROR) {
		struct iovec iov[2];

		iov[0].iov_base = stdp;
		iov[0].iov_len = cnt > stdp - tbuf ? cnt - (stdp - tbuf) : 0;
		iov[1].iov_base = "\n";
		iov[1].iov_len = 1;
		(void)writev(STDERR_FILENO, iov, 2);
	}

	/*
	 * If the sendsyslog() fails, it means that syslogd
	 * is not running or the kernel ran out of buffers.
	 */
	sendsyslog(tbuf, cnt, data->log_stat & LOG_CONS);
}

void
openlog_r(const char *ident, int logstat, int logfac, struct syslog_data *data)
{
	if (ident != NULL)
		data->log_tag = ident;
	data->log_stat = logstat;
	if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0)
		data->log_fac = logfac;
}
DEF_WEAK(openlog_r);

void
closelog_r(struct syslog_data *data)
{
	data->log_tag = NULL;
}
DEF_WEAK(closelog_r);


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: syslog_r.c,v 1.19 2017/08/08 14:23:23 bluhm Exp $ */
2			/*
3			* Copyright (c) 1983, 1988, 1993
4			* The Regents of the University of California. All rights reserved.
5			*
6			* Redistribution and use in source and binary forms, with or without
7			* modification, are permitted provided that the following conditions
8			* are met:
9			* 1. Redistributions of source code must retain the above copyright
10			* notice, this list of conditions and the following disclaimer.
11			* 2. Redistributions in binary form must reproduce the above copyright
12			* notice, this list of conditions and the following disclaimer in the
13			* documentation and/or other materials provided with the distribution.
14			* 3. Neither the name of the University nor the names of its contributors
15			* may be used to endorse or promote products derived from this software
16			* without specific prior written permission.
17			*
18			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28			* SUCH DAMAGE.
29			*/
30
31			#include <sys/types.h>
32			#include <sys/uio.h>
33			#include <netdb.h>
34
35			#include <errno.h>
36			#include <fcntl.h>
37			#include <paths.h>
38			#include <stdio.h>
39			#include <stdlib.h>
40			#include <string.h>
41			#include <syslog.h>
42			#include <time.h>
43			#include <unistd.h>
44			#include <limits.h>
45			#include <stdarg.h>
46
47			/* Reentrant version of syslog, i.e. syslog_r() */
48			void
49			syslog_r(int pri, struct syslog_data data, const char fmt, ...)
50			{
51			va_list ap;
52
53			va_start(ap, fmt);
54			vsyslog_r(pri, data, fmt, ap);
55			va_end(ap);
56			}
57			DEF_WEAK(syslog_r);
58
59			void
60			vsyslog_r(int pri, struct syslog_data data, const char fmt, va_list ap)
61			{
62			__vsyslog_r(pri, data, 1, fmt, ap);
63			}
64			DEF_WEAK(vsyslog_r);
65
66			/*
67			* This is used by both syslog_r and syslog.
68			*/
69			void
70			__vsyslog_r(int pri, struct syslog_data *data,
71			int reentrant, const char *fmt, va_list ap)
72			{
73			int cnt;
74			char ch, p, t;
75			int saved_errno;
76			#define TBUF_SIZE (LOG_MAXLINE+1)
77			#define FMT_SIZE (1024+1)
78		8	char *stdp = NULL, tbuf[TBUF_SIZE], fmt_cpy[FMT_SIZE];
79			int tbuf_left, fmt_left, prlen;
80
81			#define INTERNALLOG LOG_ERR\|LOG_CONS\|LOG_PERROR\|LOG_PID
82			/* Check for invalid bits. */
83	✗✓	4	if (pri & ~(LOG_PRIMASK\|LOG_FACMASK)) {
84			syslog_r(INTERNALLOG, data,
85			"syslog%s: unknown facility/priority: %x",
86			reentrant ? "_r" : "", pri);
87			pri &= LOG_PRIMASK\|LOG_FACMASK;
88			}
89
90			/* Check priority against setlogmask values. */
91	✗✓	4	if (!(LOG_MASK(LOG_PRI(pri)) & data->log_mask))
92			return;
93
94		4	saved_errno = errno;
95
96			/* Set default facility if none specified. */
97	✓✗	4	if ((pri & LOG_FACMASK) == 0)
98		4	pri \|= data->log_fac;
99
100		4	p = tbuf;
101			tbuf_left = TBUF_SIZE;
102
103			#define DEC() \
104			do { \
105			if (prlen < 0) \
106			prlen = 0; \
107			if (prlen >= tbuf_left) \
108			prlen = tbuf_left - 1; \
109			p += prlen; \
110			tbuf_left -= prlen; \
111			} while (0)
112
113		4	prlen = snprintf(p, tbuf_left, "<%d>", pri);
114	✗✓	8	DEC();
115
116	✗✓	4	if (data->log_stat & LOG_PERROR)
117			stdp = p;
118	✗✓	4	if (data->log_tag == NULL)
119			data->log_tag = __progname;
120	✓✗	4	if (data->log_tag != NULL) {
121		4	prlen = snprintf(p, tbuf_left, "%.*s", NAME_MAX, data->log_tag);
122	✗✓	8	DEC();
123		4	}
124	✓✗	4	if (data->log_stat & LOG_PID) {
125		4	prlen = snprintf(p, tbuf_left, "[%ld]", (long)getpid());
126	✗✓	8	DEC();
127		4	}
128	✓✗	4	if (data->log_tag != NULL) {
129	✓✗	4	if (tbuf_left > 1) {
130		4	*p++ = ':';
131		4	tbuf_left--;
132		4	}
133	✓✗	4	if (tbuf_left > 1) {
134		4	*p++ = ' ';
135		4	tbuf_left--;
136		4	}
137			}
138
139	✓✓	80	for (t = fmt_cpy, fmt_left = FMT_SIZE;
140		40	(ch = *fmt) != '\0' && fmt_left > 1;
141		36	++fmt) {
142	✗✓✗✗	36	if (ch == '%' && fmt[1] == 'm') {
143			char ebuf[NL_TEXTMAX];
144
145			++fmt;
146			(void)strerror_r(saved_errno, ebuf, sizeof(ebuf));
147			prlen = snprintf(t, fmt_left, "%s", ebuf);
148			if (prlen < 0)
149			prlen = 0;
150			if (prlen >= fmt_left)
151			prlen = fmt_left - 1;
152			t += prlen;
153			fmt_left -= prlen;
154	✗✓✗✗	36	} else if (ch == '%' && fmt[1] == '%' && fmt_left > 2) {
155			++fmt;
156			*t++ = '%';
157			*t++ = '%';
158			fmt_left -= 2;
159			} else {
160		36	*t++ = ch;
161		36	fmt_left--;
162			}
163			}
164		4	*t = '\0';
165
166		4	prlen = vsnprintf(p, tbuf_left, fmt_cpy, ap);
167	✗✓	8	DEC();
168		4	cnt = p - tbuf;
169	✓✗✗✓	12	while (cnt > 0 && p[-1] == '\n') {
170			*(--p) = '\0';
171			--cnt;
172			}
173
174			/* Output to stderr if requested. */
175	✗✓	4	if (data->log_stat & LOG_PERROR) {
176			struct iovec iov[2];
177
178			iov[0].iov_base = stdp;
179			iov[0].iov_len = cnt > stdp - tbuf ? cnt - (stdp - tbuf) : 0;
180			iov[1].iov_base = "\n";
181			iov[1].iov_len = 1;
182			(void)writev(STDERR_FILENO, iov, 2);
183			}
184
185			/*
186			* If the sendsyslog() fails, it means that syslogd
187			* is not running or the kernel ran out of buffers.
188			*/
189		4	sendsyslog(tbuf, cnt, data->log_stat & LOG_CONS);
190		8	}
191
192			void
193			openlog_r(const char ident, int logstat, int logfac, struct syslog_data data)
194			{
195	✓✗	4	if (ident != NULL)
196		2	data->log_tag = ident;
197		2	data->log_stat = logstat;
198	✓✗✓✗	4	if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0)
199		2	data->log_fac = logfac;
200		2	}
201			DEF_WEAK(openlog_r);
202
203			void
204			closelog_r(struct syslog_data *data)
205			{
206			data->log_tag = NULL;
207			}
208			DEF_WEAK(closelog_r);