mdw@git.distorted.org.uk Git - misc/blob - xtitle.c

   1 #include <errno.h>
   2 #include <unistd.h>
   3 #include <termios.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <fcntl.h>
   8
   9 int main(int argc, char *argv[])
  10 {
  11   int query = 0;
  12   int fd;
  13   int openned = 0;
  14   int i;
  15
  16   for (;;) {
  17     i = getopt(argc, argv, "q");
  18     if (i < 0)
  19       break;
  20     switch (i) {
  21       case 'q':
  22         query = 1;
  23         break;
  24       default:
  25         fprintf(stderr, "usage: xtitle [-q] [STRING]\n");
  26         return (1);
  27     }
  28   }
  29
  30   if (!query && optind == argc) {
  31     fprintf(stderr, "xtitle: no string to set\n");
  32     return (1);
  33   }
  34
  35   {
  36     char *t = getenv("TERM");
  37     if (!t || strncmp(t, "xterm", 5))
  38       return (0);
  39   }
  40
  41   if (isatty(0))
  42     fd = 0;
  43   else {
  44     fd = open("/dev/tty", O_RDWR);
  45     if (fd < 0) {
  46       fprintf(stderr, "xtitle: couldn't open terminal: %s", strerror(errno));
  47       return (1);
  48     }
  49     openned = 1;
  50   }
  51
  52   if (!query) {
  53     char sp = ' ';
  54     write(fd, "\33]0;", 4);
  55     for (i = optind; i < argc; i++) {
  56       write(fd, argv[i], strlen(argv[i]));
  57       if (i < argc - 1)
  58         write(fd, &sp, 1);
  59     }
  60     write(fd, "\7", 2);
  61   } else {
  62     struct termios o, n;
  63     char hack;
  64     int state = 0;
  65
  66     tcgetattr(fd, &o);
  67     n = o;
  68     n.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
  69                    |INLCR|IGNCR|ICRNL|IXON);
  70     n.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
  71     n.c_cflag &= ~(CSIZE|PARENB);
  72     n.c_cflag |= CS8;
  73     tcsetattr(fd, TCSAFLUSH, &n);
  74     write(fd, "\33[21t", 5);
  75
  76     while (state != -1) {
  77       if (read(fd, &hack, 1) < 1)
  78         break;
  79       switch (state) {
  80         case 0:
  81           if (hack == '\33') state = 1;
  82           break;
  83         case 1:
  84           if (hack == ']') state = 2; else state = 0;
  85           break;
  86         case 2:
  87           if (hack == 'l') state = 3; else state = 0;
  88           break;
  89         case 3:
  90           if (hack == '\33') state = 4; else putchar(hack);
  91           break;
  92         case 4:
  93           if (hack == '\\') { state = -1; putchar('\n'); }
  94           else { putchar('\33'); putchar(hack); state = 3; }
  95           break;
  96       }
  97     }
  98
  99     tcsetattr(fd, TCSAFLUSH, &o);
 100   }
 101
 102   if (openned)
 103     close(fd);
 104
 105   return (0);
 106 }