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
|
#include "elementary_config.h"
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#ifdef HAVE_ENVIRON
# define _GNU_SOURCE 1
#endif
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifdef HAVE_ALLOCA_H
# include <alloca.h>
#endif
#ifdef HAVE_ENVIRON
extern char **environ;
#endif
#define LENGTH_OF_SOCKADDR_UN(s) (strlen((s)->sun_path) + (size_t)(((struct sockaddr_un *)NULL)->sun_path))
int
main(int argc, char **argv)
{
int sock, socket_unix_len, i, n;
struct sockaddr_un socket_unix;
char buf[PATH_MAX];
struct stat st;
char *exe;
int we_are_elementary_run = 0;
char *domain;
char *cwd;
char *rundir;
int sargc, slen, envnum;
unsigned char *sbuf = NULL, *pos;
char **sargv = NULL;
if (!getcwd(buf, sizeof(buf) - 1))
{
fprintf(stderr, "elementary_quicklaunch: currect working dir too big.\n");
exit(-1);
}
cwd = strdup(buf);
if (!(domain = getenv("ELM_QUICKLAUNCH_DOMAIN")))
{
domain = getenv("WAYLAND_DISPLAY");
if (!domain) domain = getenv("DISPLAY");
if (!domain) domain = "unknown";
}
rundir = getenv("XDG_RUNTIME_DIR");
if (!rundir) rundir = "/tmp";
snprintf(buf, sizeof(buf), "%s/elm-ql-%i/%s", rundir, getuid(), domain);
if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
{
perror("elementary_quicklaunch: socket(AF_UNIX, SOCK_STREAM, 0)");
exit(-1);
}
socket_unix.sun_family = AF_UNIX;
strncpy(socket_unix.sun_path, buf, sizeof(socket_unix.sun_path));
socket_unix.sun_path[(int)(sizeof(socket_unix.sun_path)/sizeof(socket_unix.sun_path[0])) - 1] = '\0';
socket_unix_len = LENGTH_OF_SOCKADDR_UN(&socket_unix);
if (connect(sock, (struct sockaddr *)&socket_unix, socket_unix_len) < 0)
{
perror("elementary_quicklaunch: connect(sock, (struct sockaddr *)&socket_unix, socket_unix_len)");
printf("elementary_quicklaunch: cannot connect to socket '%s'\n", buf);
exit(1);
}
exe = argv[0];
if (!(((exe[0] == '/')) ||
((exe[0] == '.') && (exe[1] == '/')) ||
((exe[0] == '.') && (exe[1] == '.') && (exe[2] == '/'))))
{
char *path = getenv("PATH");
int exelen = strlen(argv[0]);
if (path)
{
const char *p, *pp;
p = path;
pp = p;
exe = NULL;
for (;;)
{
if ((*p == ':') || (!*p))
{
unsigned int len;
len = p - pp;
if (len < (sizeof(buf) - exelen - 3))
{
strncpy(buf, pp, len);
strcpy(buf + len, "/");
strcpy(buf + len + 1, argv[0]);
if (!access(buf, R_OK | X_OK))
{
exe = buf;
break;
}
if (!*p) break;
p++;
pp = p;
}
}
else
{
if (!*p) break;
p++;
}
}
}
}
if (exe)
{
if (!lstat(exe, &st))
{
if (S_ISLNK(st.st_mode))
{
char buf2[PATH_MAX];
ssize_t len = readlink(exe, buf2, sizeof(buf2) - 1);
if (len >= 0)
{
char *p;
buf2[len] = 0;
p = strrchr(buf2, '/');
if (p) p++;
else p = buf2;
if (!strncasecmp(p, "elementary_run", 14))
we_are_elementary_run = 1;
}
}
}
}
if (we_are_elementary_run)
{
sargc = argc;
sargv = argv;
}
else
{
sargc = argc - 1;
sargv = &(argv[1]);
}
slen = 0;
envnum = 0;
// header:
// UL 'total bytes'
// UL 'argnum'
// UL 'envnum'
slen += sizeof(unsigned long) * 3;
for (i = 0; i < sargc; i++)
{
slen += sizeof(unsigned long);
slen += strlen(sargv[i]) + 1;
}
#ifdef HAVE_ENVIRON
// count how much space is needed for environment
for (i = 0; environ[i]; i++)
{
slen += sizeof(unsigned long);
slen += strlen(environ[i]) + 1;
envnum++;
}
#endif
// how much space is needed for cwd
slen += sizeof(unsigned long);
slen += strlen(cwd) + 1;
// allocate buffer on stack
sbuf = alloca(slen);
// fill in header
((unsigned long *)(sbuf))[0] = slen - sizeof(unsigned long);
((unsigned long *)(sbuf))[1] = sargc;
((unsigned long *)(sbuf))[2] = envnum;
// pos pointer after header
pos = (unsigned char *)(&((((unsigned long *)(sbuf))[3 + sargc + envnum + 1])));
n = 3;
// fill in args
for (i = 0; i < sargc; i++)
{
((unsigned long *)(sbuf))[n] = (unsigned long)pos - (unsigned long)sbuf;
strcpy((char *)pos, sargv[i]);
pos += strlen(sargv[i]) + 1;
n++;
}
#ifdef HAVE_ENVIRON
// fill in environ
for (i = 0; environ[i]; i++)
{
((unsigned long *)(sbuf))[n] = (unsigned long)pos - (unsigned long)sbuf;
strcpy((char *)pos, environ[i]);
pos += strlen(environ[i]) + 1;
n++;
}
#endif
// fill in cwd
((unsigned long *)(sbuf))[n] = (unsigned long)pos - (unsigned long)sbuf;
n++;
strcpy((char *)pos, cwd);
if (write(sock, sbuf, slen) < 0)
printf("elementary_quicklaunch: cannot write to socket '%s'\n", buf);
close(sock);
free(cwd);
return 0;
}
|
