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
|
/*
* a simple urlopener
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <sys/types.h>
#define NOFORK 1 /* if set we wont fork and execute programs */
#define LEN(arr) ((int) (sizeof (arr) / sizeof (arr)[0]))
#define BUFFSIZE 256 /* size of malloc buffers (max program/extension list length) */
char *programs[][2] =
{
{"default", /* this is the default program */ "/usr/bin/qutebrowser"},
{"jpg,jpeg,png", "/usr/bin/feh"},
{"gif,gifv,webm,mp4,mp3,wav,flac", "/usr/bin/mpv --loop --force-window=yes"},
{"pdf", "/usr/bin/mupdf"}
};
char *forceddomains[][2] =
{
/* if the domain is listed here, the index into programs[x][]
* will be the number, don't add the protocol identifier
*/
{"youtube.com", "2"},
{"youtu.be", "2"},
{"streamable.com", "2"}
};
int
islink(char *url)
{
/*
* terribly check if something has a "protocol://"
* if it does, we assume it is a link
*/
char *p = NULL;
if ((p = strstr(url, "://")))
{
int s = (p-url);
/*
* check if the number of characters before the '://' is >0 && <10 && contains a '.'
* 10 is a reasonable number plucked out of thin air, RFC 3986 does not state a maximum
* we would like to avoid false positives, not that it matters much
*/
if (s > 0 && s <= 10 && strchr(url, '.') != NULL)
// it's probably a link
return 1;
}
return 0;
}
int
getext(char *url)
{
/*
* check if the extension of the url (if exists) is in our array
* if it is, return the index on the array, otherwise 0
*/
int ret = 0;
char *p = NULL;
if ((p = strrchr(url, '.')+1))
{
for (int i = 0; i < LEN(programs); i++)
{
char *buff = malloc(BUFFSIZE);
if (buff == NULL)
return 0;
strncpy(buff, programs[i][0], BUFFSIZE-1);
char *t = strtok(buff, ",");
while (t != NULL)
{
if (strcmp(t, p) == 0)
{
ret = i;
}
t = strtok(NULL, ",");
}
free(buff);
}
}
return ret;
}
int
checkforceddomains(char *url, int ext)
{
/*
* check if the domain is one we should force to use a program
*/
/*
* checking process:
* domain is already probably a url
* check if first x characters after protocol identifier is in the list?
* return the number specified in the array
*/
int ret = ext;
char *buff = malloc(BUFFSIZE);
char *buff2 = malloc(BUFFSIZE);
if (buff == NULL || buff2 == NULL)
{
perror("malloc");
goto exitdomaincheck; /* exit right away */
}
strncpy(buff, url, BUFFSIZE-1);
char *p = NULL;
p = strstr(buff, "://");
if (p == NULL)
goto exitdomaincheck; /* exit right away */
p += 3; /* get rid of the '://' */
/*
* at this point we know:
* there exists '://'
* so we can tokenise a new buffer at '/' and _assume_ that is the domain
*/
strncpy(buff2, p, BUFFSIZE-1);
// wow this is bad
char *tmp = strchr(buff2, '/');
if (tmp == NULL) /* nothing specificed after the domain, just exit */
goto exitdomaincheck;
*(tmp) = '\0';
/*
* now we need to loop through the array and check if there is a number to force
* we can reuse our first buffer and char pointer here
*/
for (int i = 0; i < LEN(forceddomains); i++)
{
strncpy(buff, forceddomains[i][0], BUFFSIZE-1);
if (strcmp(buff, buff2) == 0)
{
//printf("domain should be forced as %s\n", buff);
ret = atoi(forceddomains[i][1]);
goto exitdomaincheck;
}
}
exitdomaincheck:
free(buff);
free(buff2);
return ret;
}
int
main(int argc, char *argv[])
{
int link = 0;
int ext = 0;
// we don't care about children
signal(SIGCHLD, SIG_IGN);
for (int i = 1; i < argc; i++)
{
/*
* loop through every argument, check if it is a link
* if we think it is a link, check if the extension exists in the array
* fork, execute
*/
link = islink(argv[i]);
//printf("%s is probably %s link\n", argv[i], (link == 1) ? "a" : "not a");
if (link == 1)
{
ext = getext(argv[i]);
// check if the domain should be forced to a program
ext = checkforceddomains(argv[i], ext);
printf("program to run is: \"%s %s\"\n", programs[ext][1], argv[i]);
if (NOFORK == 0)
{
pid_t pid = fork();
if (pid == 0)
{
// child process
// close std{out,err}
fclose(stdout);
fclose(stderr);
char *args[20];
char *buff = malloc(BUFFSIZE);
if (buff == NULL)
{
perror("malloc");
return -1;
}
/*
* the program we're calling might have arguments,
* so we tokenise the string and add each part to an array
* that we will use in execvp
*/
strncpy(buff, programs[ext][1], BUFFSIZE-1);
char *t = strtok(buff, " ");
int z = 0;
while (t != NULL)
{
args[z] = t;
t = strtok(NULL, " ");
z++;
}
args[z] = argv[i];
args[z+1] = (char *)0;
execvp(args[0], args);
_exit(1);
}
else if (pid == -1)
{
perror("fork error");
}
}
}
}
return 0;
}
|
