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/*
* safetitle sets the title of the terminal window to the given string,
* unless the terminal type is blacklisted.
*/
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/select.h>
#include <termios.h>
#include <unistd.h>
#define WSCONS 0
#define SCREEN 1
#define WSCONS_DA (char[]){27,91,62,50,52,59,50,48,59,48,99,0}
#define SCREEN_DA (char[]){27,91,62,56,51,59,52,48,56,48,48,59,48,99,0}
int debug = 0;
int screen = 0;
int
blacklisted(int fd)
{
char *buf, c;
fd_set fds;
int i, r;
struct timeval timeout;
/* setup */
if((buf = malloc(200*sizeof(char)))==NULL)
err(1, "malloc");
/* check if GNU screen */
write(fd, "\033[>c", 4);
i = 0;
while(r = read(fd, &c, 1)){
if(r==-1){
warn("read");
return 1;
}
buf[i++] = c;
if(c=='c') break;
}
buf[i] = '\0';
screen = strcmp(buf, SCREEN_DA)==0;
FD_ZERO(&fds);
FD_SET(fd, &fds);
timeout.tv_sec = 0;
timeout.tv_usec = 0;
/* ignore strange trailing nul */
while(select(fd+1, &fds, NULL, NULL, &timeout)>0)
read(fd, &c, 1);
/* check (real) terminal type(s) */
if(screen) write(fd, "\033P\033[>c\033\\", 8);
else write(fd, "\033[>c", 4);
i = 0;
while(r = read(fd, &c, 1)){
loop:
if(r==-1){
warn("read");
return 1;
}
buf[i++] = c;
if(c==99) break;
}
buf[i] = '\0';
if(strcmp(buf, WSCONS_DA)==0){
if(debug) fprintf(stderr, "blacklisted terminal type\n");
return 1;
}
/* go back and check remaining responses (if any) */
check:
FD_ZERO(&fds);
FD_SET(fd, &fds);
timeout.tv_sec = 0;
timeout.tv_usec = 1;
if(screen && select(fd+1, &fds, NULL, NULL, &timeout)>0){
i = 0;
if(read(fd, &c, 1)==-1){
warn("read");
return 1;
}
if(c==0) goto check; /* ignore strange trailing nul */
else goto loop;
}
return 0;
}
int
main(int argc, char *argv[])
{
char *ap;
int ttyfd;
struct termios term, restore;
/* parse arguments */
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");
/* 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(blacklisted(ttyfd))
goto end;
/* set title */
if(screen) dprintf(ttyfd, "\033P\033]2;%s\007\033\\", ap);
else dprintf(ttyfd, "\033]2;%s\007", ap);
tcsetattr(ttyfd, TCSANOW, &restore);
return 0;
end:
tcsetattr(ttyfd, TCSANOW, &restore);
return 1;
usage:
fprintf(stderr, "usage: %s [-d] title\n", argv[0]);
return 1;
}
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