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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/installboot/util.c	Lines:	0	59	0.0 %
Date:	2017-11-07	Branches:	0	30	0.0 %


/*	$OpenBSD: util.c,v 1.11 2015/11/04 02:12:49 jsg Exp $	*/

/*
 * Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
 *
 * 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/stat.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>

#include "installboot.h"

#define MINIMUM(a, b)	(((a) < (b)) ? (a) : (b))

#define BUFSIZE 512

int
filecopy(const char *srcfile, const char *dstfile)
{
	struct stat sb;
	ssize_t sz, n;
	int sfd, dfd;
	char *buf;

	sfd = open(srcfile, O_RDONLY);
	if (sfd == -1) {
		warn("open %s", srcfile);
		return (-1);
	}
	if (fstat(sfd, &sb) == -1) {
		warn("fstat");
		return (-1);
	}
	sz = sb.st_size;

	dfd = open(dstfile, O_WRONLY|O_CREAT);
	if (dfd == -1) {
		warn("open %s", dstfile);
		return (-1);
	}
	if (fchown(dfd, 0, 0) == -1)
		if (errno != EINVAL) {
			warn("chown");
			return (-1);
		}
	if (fchmod(dfd, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) == -1) {
		warn("chmod");
		return (-1);
	}

	if ((buf = malloc(BUFSIZE)) == NULL) {
		warn("malloc");
		return (-1);
	}

	while (sz > 0) {
		n = MINIMUM(sz, BUFSIZE);
		if ((n = read(sfd, buf, n)) == -1) {
			warn("read");
			free(buf);
			return (-1);
		}
		sz -= n;
		if (write(dfd, buf, n) != n) {
			warn("write");
			free(buf);
			return (-1);
		}
	}

	ftruncate(dfd, sb.st_size);

	close(dfd);
	close(sfd);
	free(buf);

	return (0);
}

char *
fileprefix(const char *base, const char *path)
{
	char *r, *s;
	int n;

	if ((s = malloc(PATH_MAX)) == NULL) {
		warn("malloc");
		return (NULL);
	}
	n = snprintf(s, PATH_MAX, "%s/%s", base, path);
	if (n < 1 || n >= PATH_MAX) {
		free(s);
		warn("snprintf");
		return (NULL);
	}
	if ((r = realpath(s, NULL)) == NULL) {
		free(s);
		warn("realpath");
		return (NULL);
	}
	free(s);

	return (r);
}

/*
 * Adapted from Hacker's Delight crc32b().
 *
 * To quote http://www.hackersdelight.org/permissions.htm :
 *
 * "You are free to use, copy, and distribute any of the code on
 *  this web site, whether modified by you or not. You need not give
 *  attribution. This includes the algorithms (some of which appear
 *  in Hacker's Delight), the Hacker's Assistant, and any code submitted
 *  by readers. Submitters implicitly agree to this."
 */
u_int32_t
crc32(const u_char *buf, const u_int32_t size)
{
	int j;
	u_int32_t i, byte, crc, mask;

	crc = 0xFFFFFFFF;

	for (i = 0; i < size; i++) {
		byte = buf[i];			/* Get next byte. */
		crc = crc ^ byte;
		for (j = 7; j >= 0; j--) {	/* Do eight times. */
			mask = -(crc & 1);
			crc = (crc >> 1) ^ (0xEDB88320 & mask);
		}
	}

	return ~crc;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: util.c,v 1.11 2015/11/04 02:12:49 jsg Exp $ */
2
3			/*
4			* Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
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/stat.h>
20			#include <err.h>
21			#include <errno.h>
22			#include <fcntl.h>
23			#include <stdio.h>
24			#include <stdlib.h>
25			#include <string.h>
26			#include <unistd.h>
27			#include <limits.h>
28
29			#include "installboot.h"
30
31			#define MINIMUM(a, b) (((a) < (b)) ? (a) : (b))
32
33			#define BUFSIZE 512
34
35			int
36			filecopy(const char srcfile, const char dstfile)
37			{
38			struct stat sb;
39			ssize_t sz, n;
40			int sfd, dfd;
41			char *buf;
42
43			sfd = open(srcfile, O_RDONLY);
44			if (sfd == -1) {
45			warn("open %s", srcfile);
46			return (-1);
47			}
48			if (fstat(sfd, &sb) == -1) {
49			warn("fstat");
50			return (-1);
51			}
52			sz = sb.st_size;
53
54			dfd = open(dstfile, O_WRONLY\|O_CREAT);
55			if (dfd == -1) {
56			warn("open %s", dstfile);
57			return (-1);
58			}
59			if (fchown(dfd, 0, 0) == -1)
60			if (errno != EINVAL) {
61			warn("chown");
62			return (-1);
63			}
64			if (fchmod(dfd, S_IRUSR\|S_IWUSR\|S_IRGRP\|S_IROTH) == -1) {
65			warn("chmod");
66			return (-1);
67			}
68
69			if ((buf = malloc(BUFSIZE)) == NULL) {
70			warn("malloc");
71			return (-1);
72			}
73
74			while (sz > 0) {
75			n = MINIMUM(sz, BUFSIZE);
76			if ((n = read(sfd, buf, n)) == -1) {
77			warn("read");
78			free(buf);
79			return (-1);
80			}
81			sz -= n;
82			if (write(dfd, buf, n) != n) {
83			warn("write");
84			free(buf);
85			return (-1);
86			}
87			}
88
89			ftruncate(dfd, sb.st_size);
90
91			close(dfd);
92			close(sfd);
93			free(buf);
94
95			return (0);
96			}
97
98			char *
99			fileprefix(const char base, const char path)
100			{
101			char r, s;
102			int n;
103
104			if ((s = malloc(PATH_MAX)) == NULL) {
105			warn("malloc");
106			return (NULL);
107			}
108			n = snprintf(s, PATH_MAX, "%s/%s", base, path);
109			if (n < 1 \|\| n >= PATH_MAX) {
110			free(s);
111			warn("snprintf");
112			return (NULL);
113			}
114			if ((r = realpath(s, NULL)) == NULL) {
115			free(s);
116			warn("realpath");
117			return (NULL);
118			}
119			free(s);
120
121			return (r);
122			}
123
124			/*
125			* Adapted from Hacker's Delight crc32b().
126			*
127			* To quote http://www.hackersdelight.org/permissions.htm :
128			*
129			* "You are free to use, copy, and distribute any of the code on
130			* this web site, whether modified by you or not. You need not give
131			* attribution. This includes the algorithms (some of which appear
132			* in Hacker's Delight), the Hacker's Assistant, and any code submitted
133			* by readers. Submitters implicitly agree to this."
134			*/
135			u_int32_t
136			crc32(const u_char *buf, const u_int32_t size)
137			{
138			int j;
139			u_int32_t i, byte, crc, mask;
140
141			crc = 0xFFFFFFFF;
142
143			for (i = 0; i < size; i++) {
144			byte = buf[i]; /* Get next byte. */
145			crc = crc ^ byte;
146			for (j = 7; j >= 0; j--) { /* Do eight times. */
147			mask = -(crc & 1);
148			crc = (crc >> 1) ^ (0xEDB88320 & mask);
149			}
150			}
151
152			return ~crc;
153			}