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
|
#define _GNU_SOURCE /* program_invocation_name */
#include <assert.h> /* assert(3p) */
#include <errno.h> /* program_invocation_name */
#include <error.h> /* error(3gnu) */
#include <fcntl.h> /* O_* flags to open(3p) */
#include <glob.h> /* glob(3p), globfree(3p), GLOB_* */
#include <signal.h> /* sigaction(3p) */
#include <stdio.h> /* dprintf(3p) */
#include <stdlib.h> /* exit(3p), malloc(3p) */
#include <string.h> /* strcmp(3p), strlen(3p), strcpy(3p) */
#include <sys/stat.h> /* open(3p) */
#include <unistd.h> /* unlink(3p) */
/* Main *************************************************************/
struct impl {
int (*left_click)(void);
int (*middle_click)(void);
int (*right_click)(void);
int (*scroll_up)(void);
int (*scroll_down)(void);
int (*update)(const char *tag);
} impl;
#define errusage(...) do { \
error(6, 0, __VA_ARGS__); \
usage(2); \
exit(2); \
} while(0)
void usage(int fd) {
dprintf(fd,
"Usage: %1$s NN_LABEL\n"
" or: %1$s BTN_ID\n"
" or: %1$s -h\n",
program_invocation_name);
}
void sigexit(int sig) {
error(0, 0, "Cought signal: %d", sig);
exit(0);
}
int main(int argc, char *argv[]) {
if (argc != 2) {
errusage("exactly 1 argument expected, got %d", argc-1);
}
const char *arg = argv[1];
if (strcmp(arg, "-h") == 0) {
usage(1);
exit(0);
}
struct sigaction sa = { 0 };
sa.sa_handler = sigexit;
sigaction(SIGHUP, &sa, NULL);
sigaction(SIGINT, &sa, NULL);
sigaction(SIGTERM, &sa, NULL);
if ('1' <= arg[0] && arg[0] <= '5' && arg[1] == '\0') {
int (*fn)(void) = NULL;
switch (arg[0]) {
case '1': fn = impl.left_click; break;
case '2': fn = impl.middle_click; break;
case '3': fn = impl.right_click; break;
case '4': fn = impl.scroll_up; break;
case '5': fn = impl.scroll_down; break;
}
char *xrd = getenv("XDG_RUNTIME_DIR");
if (xrd == NULL || xrd[0] == '\0') {
error(6, 0, "XDG_RUNTIME_DIR isn't set");
}
if (fn == NULL) {
exit(0);
} else {
exit(fn());
}
}
if ('0' <= arg[0] && arg[0] <= '9' &&
'0' <= arg[1] && arg[1] <= '9' &&
arg[2] == '_') {
char *xrd = getenv("XDG_RUNTIME_DIR");
if (xrd == NULL || xrd[0] == '\0') {
error(6, 0, "XDG_RUNTIME_DIR isn't set");
}
if (impl.update == NULL) {
exit(0);
} else {
exit(impl.update(arg));
}
}
errusage("invalid argument: %s", arg);
}
/* Util *************************************************************/
#define RBAR_DIRGLOB "/wmii*/rbar"
char *rbar_globescape(const char *lit) {
size_t len = 0;
for (const char *a = lit; *a != '\0'; a++) {
switch (*a) {
case '\\': case '*': case '?': case '[':
len++; /* fall through */
default:
len++;
}
}
char *glob = malloc(len+1);
if (!glob)
error(1, errno, "rbar_globescape: malloc");
// copy 'a' to 'b'
char *b = glob;
for (const char *a = lit; *a != '\0'; a++) {
switch (*a) {
case '\\': case '*': case '?': case '[':
*(b++) = '\\'; /* fall through */
default:
*(b++) = *a;
}
}
*b = '\0';
return glob;
}
/* returns 0 or GLOB_NOMATCH */
int rbar_write(const char *filename, const char *msg) {
static const char *xrd = NULL;
static size_t xrdlen;
if (!xrd) {
xrd = rbar_globescape(getenv("XDG_RUNTIME_DIR"));
xrdlen = strlen(xrd);
}
char *fullglob = alloca(xrdlen+(sizeof RBAR_DIRGLOB));
strcpy(fullglob, xrd);
strcpy(&fullglob[xrdlen], RBAR_DIRGLOB);
glob_t globbuf = { 0 };
switch (glob(fullglob, GLOB_ONLYDIR|GLOB_NOSORT, NULL, &globbuf)) {
case GLOB_NOSPACE:
error(1, ENOMEM, "rbar_write"); assert(0);
case GLOB_ABORTED:
error(1, errno, "rbar_write: glob"); assert(0);
case GLOB_NOMATCH:
return GLOB_NOMATCH;
}
const size_t filenamelen = strlen(filename);
const size_t msglen = strlen(msg);
for (size_t i = 0; i < globbuf.gl_pathc; i++) {
const char *dirname = globbuf.gl_pathv[i];
const size_t dirnamelen = strlen(dirname);
char *fullname = alloca(dirnamelen+1+filenamelen+1);
strcpy(fullname, dirname);
fullname[dirnamelen] = '/';
strcpy(&fullname[dirnamelen+1], filename);
int fd = open(fullname, O_WRONLY|O_APPEND|O_CREAT, 0666);
if (fd < 0)
continue;
write(fd, msg, msglen);
}
return 0;
}
void rbar_remove(const char *fileglob) {
static const char *xrd = NULL;
static size_t xrdlen;
if (!xrd) {
xrd = rbar_globescape(getenv("XDG_RUNTIME_DIR"));
xrdlen = strlen(xrd);
}
char *fullglob = alloca(xrdlen+(sizeof RBAR_DIRGLOB)+strlen(fileglob)+1);
strcpy(fullglob, xrd);
strcpy(&fullglob[xrdlen], RBAR_DIRGLOB);
fullglob[xrdlen+(sizeof RBAR_DIRGLOB)-1] = '/';
strcpy(&fullglob[xrdlen+(sizeof RBAR_DIRGLOB)], fileglob);
glob_t globbuf = { 0 };
if (glob(fullglob, GLOB_NOSORT, NULL, &globbuf) != 0)
return;
for (size_t i = 0; i < globbuf.gl_pathc; i++) {
unlink(globbuf.gl_pathv[i]);
}
}
|
