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
|
/*-
* redshift-ng - Automatically adjust display colour temperature according the Sun
*
* Copyright (c) 2009-2018 Jon Lund Steffensen <jonlst@gmail.com>
* Copyright (c) 2014-2016, 2025 Mattias Andrée <m@maandree.se>
*
* redshift-ng 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 3 of the License, or
* (at your option) any later version.
*
* redshift-ng 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 redshift-ng. If not, see <http://www.gnu.org/licenses/>.
*/
#include "common.h"
/**
* Names of periods supplied to scripts
*/
static const char *period_names[] = {
[PERIOD_NONE] = "none",
[PERIOD_DAYTIME] = "daytime",
[PERIOD_NIGHT] = "night",
[PERIOD_TRANSITION] = "transition"
};
/**
* Path name of the hook directory, `NULL` if not found
*/
static char *dirpath = NULL;
/**
* The allocation size of `dirpath`
*/
static size_t dirpathsize;
/**
* The length of the string in `dirpath`
*/
static size_t dirpathlen;
/**
* Paths, in order of priority, to test when looking for
* the hook directory for redshift
*/
static const struct env_path paths[] = {
{0, "XDG_CONFIG_HOME", "/redshift-ng/hooks"},
{0, "XDG_CONFIG_HOME", "/redshift/hooks"},
#if defined(WINDOWS)
{0, "localappdata", "/redshift-ng/hooks"},
{0, "localappdata", "/redshift/hooks"},
#endif
{0, "HOME", "/.config/redshift-ng/hooks"},
{0, "HOME", "/.config/redshift/hooks"},
{0, NULL, "/.config/redshift-ng/hooks"},
{0, NULL, "/.config/redshift/hooks"},
{1, "XDG_CONFIG_DIRS", "/redshift-ng/hooks"},
{1, "XDG_CONFIG_DIRS", "/redshift/hooks"},
#if !defined(WINDOWS)
{0, "", "/etc/redshift-ng/hooks"},
{0, "", "/etc/redshift/hooks"}
#endif
};
/**
* Deallocates `dirpath`
*/
static void
cleanup(void)
{
free(dirpath);
dirpath = NULL;
}
/**
* Search for and open the hook directory for reading
*
* @param path_out Output parameter for the hook directroy path
* @param pathbuf_out Output parameter for the memory allocation for `*path_out`;
* will be set to `NULL`; shall be free(3)d by the caller
* @return `DIR` object for the reading the directory; `NULL` if not found
*/
static DIR *
open_hooks_dir(const char **path_out, char **pathbuf_out)
{
DIR *dir = NULL;
size_t i;
*path_out = NULL;
*pathbuf_out = NULL;
for (i = 0; !dir && i < ELEMSOF(paths); i++)
dir = try_path_opendir(&paths[i], path_out, pathbuf_out);
if (dir)
weprintf(_("Found hook directory `%s'."), *path_out);
else
weprintf(_("No hook directory found."));
return dir;
}
/**
* Run hooks
*
* @param argv `NULL` terminated list of command line arguments
* for the hooks; must contain an unused initial slot,
* which the function will use to provide the zeroth
* argument
*/
static void
run_hooks(const char *argv[])
{
static int looked_up_dir = 0;
DIR *dir;
struct dirent *f;
size_t required;
const char *dirpath_static;
if (!looked_up_dir) {
looked_up_dir = 1;
dir = open_hooks_dir(&dirpath_static, &dirpath);
if (!dir)
return;
if (!dirpath)
dirpath = estrdup(dirpath_static);
dirpathsize = dirpathlen = strlen(dirpath);
atexit(&cleanup);
} else if (dirpath) {
dir = opendir(dirpath);
if (!dir) {
weprintf("opendir %s:", dirpath);
cleanup();
return;
}
} else {
return;
}
while ((errno = 0, f = readdir(dir))) {
if (f->d_name[0] == '.' || !f->d_name[0] || strchr(f->d_name, '\0')[-1] == '~')
continue;
required = dirpathlen + sizeof("/") + strlen(f->d_name);
if (required > dirpathsize)
dirpath = erealloc(dirpath, dirpathsize = required);
#ifdef WINDOWS
/* TODO [Windows] hooks are not support on Windows */
#else
switch (fork()) {
case -1:
weprintf("fork:");
break;
case 0:
if (dup2(STDOUT_FILENO, STDERR_FILENO) != STDERR_FILENO) {
weprintf("dup2 <stdout> <stderr>:");
_exit(1);
}
stpcpy(stpcpy(&dirpath[dirpathlen], "/"), f->d_name);
argv[0] = dirpath;
execv(dirpath, (const void *)argv);
if (errno != EACCES)
weprintf("execv %s:", dirpath);
_exit(1);
default:
/* SIGCHLD is ignored */
break;
}
#endif
}
if (errno)
weprintf("readdir %s:", dirpath);
closedir(dir);
}
void
run_period_change_hooks(enum period prev_period, enum period period)
{
const char *argv[] = {NULL, "period-changed", period_names[prev_period], period_names[period], NULL};
run_hooks(argv);
}
|
