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#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <unistd.h>
#include <X11/Xatom.h>
#include <X11/Xlib.h>
/* configuration */
#define ARGV "xterm", "xterm", "-e", "/usr/local/bin/ksh", "-w", writefile, NULL
#define MAX_CMD 1000
#define MAX_LOOK 1000
/* state */
Atom pidatom;
Display *display;
#define die(...) do{fprintf(stderr,__VA_ARGS__);exit(1);}while(0)
unsigned char *pidprop = 0;
Window
findwindow(unsigned int pid, Window w)
{
Atom type;
int format;
unsigned int i, nchildren;
unsigned long nitems, bytes_after;
Window *children, _root, parent;
pidprop = 0;
if (XGetWindowProperty(display, w, pidatom, 0, 1, False, XA_CARDINAL,
&type, &format, &nitems, &bytes_after, &pidprop) == Success
&& pidprop && pid == *((unsigned long *)pidprop))
return w;
if (XQueryTree(display, w, &_root, &parent, &children, &nchildren))
for (i = 0; i < nchildren; i++) {
w = findwindow(pid, children[i]);
if (w) return w;
}
return 0;
}
char *
wd(char *path)
{
char *username, *r;
username = getenv("USER");
r = strdup(path);
if (strncmp(r, "/home/", 6) == 0) {
r += 5;
if (strncmp(r + 1, username, strlen(username)) == 0)
r += strlen(username);
r[0] = '~';
}
return r;
}
int
main(int argc, char *argv[])
{
char *cwd, *cmd, *line, *writefile;
FILE *writefp;
int i;
pid_t child;
size_t size;
ssize_t len;
Window root, w;
/* create fifo */
writefile = malloc(40*sizeof(char));
if (writefile == NULL) err(1, "malloc");
sprintf(writefile, "/var/tmp/tterm/%d.w", getpid());
if (mkdir("/var/tmp/tterm", 0700) == -1 && errno != EEXIST)
err(1, "mkdir");
unlink(writefile);
if (mkfifo(writefile, 0600) == -1) err(1, "mkfifo");
/* start terminal */
if ((child = fork()) == 0) {
execlp(ARGV);
err(1, "execvp");
}
/* find new window */
display = XOpenDisplay(0);
if (display == NULL) die("could not open display\n");
root = XDefaultRootWindow(display);
pidatom = XInternAtom(display, "_NET_WM_PID", 1);
if (pidatom == None) die("no _NET_WM_PID atom found\n");
for (i = 0; !w && i++ < MAX_LOOK; w = findwindow(child, root)) ;
if (!w) die("could not find window\n");
/* watch fifo and update title */
writefp = fopen(writefile, "r");
if (writefp == NULL) err(1, "fopen");
cmd = malloc(MAX_CMD*sizeof(char));
if (cmd == NULL) err(1, "malloc");
line = NULL;
size = 0;
while ((len = getline(&line, &size, writefp)) != -1) {
if (strncmp(line, "cwd", 3) == 0) {
line += 3; line[len-4] = 0; /* chomp */
cwd = wd(line);
XStoreName(display, w, cwd);
XFlush(display);
} else if (strncmp(line, "cmd", 3) == 0) {
line += 3; line[len-4] = 0; /* chomp */
snprintf(cmd, MAX_CMD, "%s (%s)", line, cwd);
XStoreName(display, w, cmd);
XFlush(display);
} else {
XStoreName(display, w, cwd);
XFlush(display);
}
}
unlink(writefile);
XCloseDisplay(display);
}
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