aboutsummaryrefslogtreecommitdiffstats
path: root/src/utils.c
blob: 9d763c484b6b65bfdb989f0fce5f26bcd0383520 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
/* the Music Player Daemon (MPD)
 * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
 * This project's homepage is: http://www.musicpd.org
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "utils.h"
#include "log.h"
#include "conf.h"

#include "../config.h"

#include <assert.h>
#include <string.h>
#include <sys/types.h>
#include <pwd.h>
#include <fcntl.h>
#include <glib.h>

#ifdef HAVE_IPV6
#include <sys/socket.h>
#endif

void stripReturnChar(char *string)
{
	while (string && (string = strchr(string, '\n'))) {
		*string = ' ';
	}
}

void my_usleep(long usec)
{
	struct timeval tv;

	tv.tv_sec = 0;
	tv.tv_usec = usec;

	select(0, NULL, NULL, NULL, &tv);
}

int ipv6Supported(void)
{
#ifdef HAVE_IPV6
	int s;
	s = socket(AF_INET6, SOCK_STREAM, 0);
	if (s == -1)
		return 0;
	close(s);
	return 1;
#else
	return 0;
#endif
}

G_GNUC_MALLOC char *xstrdup(const char *s)
{
	char *ret = strdup(s);
	if (G_UNLIKELY(!ret))
		FATAL("OOM: strdup\n");
	return ret;
}

/* borrowed from git :) */

G_GNUC_MALLOC void *xmalloc(size_t size)
{
	void *ret;

	assert(G_LIKELY(size));

	ret = malloc(size);
	if (G_UNLIKELY(!ret))
		FATAL("OOM: malloc\n");
	return ret;
}

G_GNUC_MALLOC void *xrealloc(void *ptr, size_t size)
{
	void *ret = realloc(ptr, size);

	/* some C libraries return NULL when size == 0,
	 * make sure we get a free()-able pointer (free(NULL)
	 * doesn't work with all C libraries, either) */
	if (G_UNLIKELY(!ret && !size))
		ret = realloc(ptr, 1);

	if (G_UNLIKELY(!ret))
		FATAL("OOM: realloc\n");
	return ret;
}

G_GNUC_MALLOC void *xcalloc(size_t nmemb, size_t size)
{
	void *ret;

	assert(G_LIKELY(nmemb && size));

	ret = calloc(nmemb, size);
	if (G_UNLIKELY(!ret))
		FATAL("OOM: calloc\n");
	return ret;
}

char *parsePath(char *path)
{
	ConfigParam *param;
	struct passwd *passwd;
	char *newPath;
	char *c;
	int foundSlash = 0;
	int pos = 1;

	if (path[0] != '/' && path[0] != '~') {
		ERROR("\"%s\" is not an absolute path\n", path);
		return NULL;
	} else if (path[0] == '~') {
		if (path[1] == '/' || path[1] == '\0') {
			param = getConfigParam(CONF_USER);
			if (param && param->value) {
				passwd = getpwnam(param->value);
				if (!passwd) {
					ERROR("no such user %s\n",
				              param->value);
					return NULL;
				}
			} else {
				passwd = getpwuid(geteuid());
				if (!passwd) {
					ERROR("problems getting passwd entry "
					      "for current user\n");
					return NULL;
				}
			}
		} else {
			for (c = path + 1; *c != '\0' && *c != '/'; c++);
			if (*c == '/') {
				foundSlash = 1;
				*c = '\0';
			}
			pos = c - path;

			passwd = getpwnam(path + 1);
			if (!passwd) {
				ERROR("user \"%s\" not found\n", path + 1);
				return NULL;
			}

			if (foundSlash)
				*c = '/';
		}

		newPath = xmalloc(strlen(passwd->pw_dir) + strlen(path + pos) + 1);
		strcpy(newPath, passwd->pw_dir);
		strcat(newPath, path + pos);
	} else {
		newPath = xstrdup(path);
	}

	return newPath;
}

int set_nonblocking(int fd)
{
	int ret, flags;

	assert(fd >= 0);

	while ((flags = fcntl(fd, F_GETFL)) < 0 && errno == EINTR) ;
	if (flags < 0)
		return flags;

	flags |= O_NONBLOCK;
	while ((ret = fcntl(fd, F_SETFL, flags)) < 0 && errno == EINTR) ;
	return ret;
}

void init_async_pipe(int file_des[2])
{
	if (pipe(file_des) < 0)
		FATAL("Couldn't open pipe: %s", strerror(errno));
	if (set_nonblocking(file_des[0]) < 0)
		FATAL("Couldn't set non-blocking I/O: %s\n", strerror(errno));
	if (set_nonblocking(file_des[1]) < 0)
		FATAL("Couldn't set non-blocking I/O: %s\n", strerror(errno));
}

void xpthread_mutex_init(pthread_mutex_t *m, const pthread_mutexattr_t *a)
{
	int err;
	if ((err = pthread_mutex_init(m, a)))
		FATAL("failed to init mutex: %s\n", strerror(err));
}

void xpthread_cond_init(pthread_cond_t *c, pthread_condattr_t *a)
{
	int err;
	if ((err = pthread_cond_init(c, a)))
		FATAL("failed to init cond: %s\n", strerror(err));
}

void xpthread_mutex_destroy(pthread_mutex_t *mutex)
{
	int err;
	if ((err = pthread_mutex_destroy(mutex)))
		FATAL("failed to destroy mutex: %s\n", strerror(err));
}

void xpthread_cond_destroy(pthread_cond_t *cond)
{
	int err;
	if ((err = pthread_cond_destroy(cond)))
		FATAL("failed to destroy cond: %s\n", strerror(err));
}

int stringFoundInStringArray(const char *const*array, const char *suffix)
{
	while (array && *array) {
		if (strcasecmp(*array, suffix) == 0)
			return 1;
		array++;
	}

	return 0;
}