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
|
/*
* termsettitle sets the title of the terminal window to the given string,
* if and only if the terminal is recognized via its device attributes.
*
* Note that this does NOT (yet) work inside GNU screen if several terminals
* are attached to the same session.
* (Maybe we could try to read again, but with a timeout? If there is more
* to read, we read it and then abort.)
* (Or maybe there IS a way to check if there is something to read.)
*/
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#define XTERM_DA (char[]){27,91,62,52,49,59,51,51,48,59,48,99,0}
#define SCREEN_DA (char[]){27,91,62,56,51,59,52,48,56,48,48,59,48,99,0}
int
da(int fd, char *buf, int real)
{
int c, i, r;
i = 0;
if(real) write(fd, "\033P\033[>c\033\\", 8);
else write(fd, "\033[>c", 4);
while(r = read(fd, &c, 1)){
if(!r){
fprintf(stderr, "bad terminal\n");
return -1;
}
buf[i] = c;
if(c==99){
buf[++i] = '\0';
return i;
}
i++;
}
return i;
}
int
main(int argc, char *argv[])
{
char *ap, *buf;
int debug, screen, ttyfd;
struct termios term, restore;
/* parse arguments */
debug = 0;
if(argc==2)
ap = argv[1];
else if(argc==3){
ap = argv[2];
if(strcmp(argv[1], "-d")==0) debug = 1;
else goto usage;
}
else goto usage;
if((ttyfd = open("/dev/tty", O_RDWR))==-1)
err(1, "open");
if((buf = malloc(200*sizeof(char)))==NULL)
err(1, "malloc");
/* enter "raw" terminal mode */
tcgetattr(ttyfd, &restore);
tcgetattr(ttyfd, &term);
term.c_lflag &= ~(ICANON|ECHO);
tcsetattr(ttyfd, TCSANOW, &term);
/* get device attributes for real terminal */
if(da(ttyfd, buf, 0)==-1) goto fail;
if(strcmp(buf, SCREEN_DA)==0)
screen = 1;
else
screen = 0;
if(da(ttyfd, buf, screen)==-1) goto fail;
/* set title */
if(strcmp(buf, XTERM_DA)==0){
if(screen) dprintf(ttyfd, "\033P\033]2;%s\007\033\\", ap);
dprintf(ttyfd, "\033]2;%s\007", ap);
}
else{
if(debug) fprintf(stderr, "wrong type of terminal\n");
goto fail;
}
tcsetattr(ttyfd, TCSANOW, &restore);
exit(0);
fail:
tcsetattr(ttyfd, TCSANOW, &restore);
exit(1);
usage:
fprintf(stderr, "usage: %s [-d] title\n", argv[0]);
exit(1);
}
|