applications/xcwd
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return the proper path even if the program has multiple children

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This commit is contained in:
Adrien Schildknecht 2013-05-01 20:09:51 +02:00
parent dd1a5bfd32
commit e414630f01
1 changed files with 37 additions and 23 deletions
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60
xcwd.c
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@ -63,10 +63,12 @@ static Window focusedWindow()
do {
status = XGetWindowProperty(dpy, focuswin, XA_WM_STATE, 0, 1024, 0,
XA_WM_STATE, &type, &format, &nitems, &after, &data);
if (status == Success && data) {
XFree(data);
LOG("Window ID = %lu\n", focuswin);
return focuswin;
if (status == Success) {
if (data) {
XFree(data);
LOG("Window ID = %lu\n", focuswin);
return focuswin;
}
}
else
return 0;
@ -168,30 +170,43 @@ static processes_t getProcesses(void)
return p;
}
static long lastChild(processes_t p, long pid)
{
struct proc_s key, *res;
do {
key.ppid = pid;
res = (struct proc_s *)bsearch(&key, p->ps, p->n,
sizeof(struct proc_s), ppidCmp);
pid = res ? res->pid : -1;
} while(pid != -1);
return key.ppid;
}
static void readPath(long pid)
static int readPath(long pid)
{
char buf[255];
char path[64];
ssize_t len;
snprintf(path, sizeof(path), "/proc/%ld/cwd", pid);
LOG("Read %s\n", path);
if ((len = readlink(path, buf, 255)) != -1)
buf[len] = '\0';
if(len <= 0) {
LOG("Error readlink %s\n", path);
return 0;
}
LOG("Read %s\n", path);
fprintf(stdout, "%s\n", buf);
return 1;
}
static void cwdOfDeepestChild(processes_t p, long pid)
{
int i;
struct proc_s key, *res = NULL, *lastRes;
do {
lastRes = res;
key.ppid = pid;
res = (struct proc_s *)bsearch(&key, p->ps, p->n,
sizeof(struct proc_s), ppidCmp);
pid = res ? res->pid : -1;
} while(pid != -1);
for(i = 0; lastRes != p->ps && (lastRes - i)->ppid == lastRes->ppid; ++i)
if(readPath((lastRes - i)->pid))
return;
for(i = 1; lastRes != p->ps + p->n && (lastRes + i)->ppid == lastRes->ppid; ++i)
if(readPath((lastRes + i)->pid))
return;
}
int main(int argc, const char *argv[])
@ -203,6 +218,7 @@ int main(int argc, const char *argv[])
long pid;
Window w = focusedWindow();
if (w == 0) {
LOG("%s", "getenv $HOME...\n");
fprintf(stdout, "%s\n", getenv("HOME"));
return EXIT_FAILURE;
}
@ -235,10 +251,8 @@ int main(int argc, const char *argv[])
if (size != 0)
free(strings);
}
if (pid != -1) {
pid = lastChild(p, pid);
readPath(pid);
}
if (pid != -1)
cwdOfDeepestChild(p, pid);
else {
LOG("%s", "getenv $HOME...\n");
fprintf(stdout, "%s\n", getenv("HOME"));