Return the path of the deepest accessible child
This commit is contained in:
Adrien Schildknecht
parent
e826c01208
commit
1bd171cc95
116
xcwd.c
116
xcwd.c
@ -1,4 +1,4 @@
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/* This is xcwd written by Adrien Schildknecht (c) 2013
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/* This is xcwd written by Adrien Schildknecht (c) 2013-2014
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* Email: adrien+dev@schischi.me
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* Feel free to copy and redistribute in terms of the
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* BSD license
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@ -22,19 +22,21 @@
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# include <libutil.h>
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#endif
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#define DEBUG 0
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//#define DEBUG
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#define XA_STRING (XInternAtom(dpy, "STRING", 0))
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#define XA_CARDINAL (XInternAtom(dpy, "CARDINAL", 0))
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#define XA_WM_STATE (XInternAtom(dpy, "WM_STATE", 0))
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#define LOG(fmt, ...) \
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do { if (DEBUG) fprintf(stderr, fmt, __VA_ARGS__); } while (0)
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#ifdef DEBUG
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#define LOG(fmt, ...) fprintf(stderr, fmt, __VA_ARGS__)
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#else
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#define LOG(fmt, ...) do { } while (0)
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#endif
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Display *dpy;
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typedef struct processes_s *processes_t;
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struct processes_s {
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struct proc_list {
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struct proc_s {
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long pid;
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long ppid;
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@ -46,18 +48,18 @@ struct processes_s {
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size_t n;
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};
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int nameCmp(const void *p1, const void *p2)
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static int process_name_cmp(const void *p1, const void *p2)
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{
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return strcasecmp(((struct proc_s *)p1)->name,
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((struct proc_s *)p2)->name);
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}
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int ppidCmp(const void *p1, const void *p2)
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static int process_ppid_cmp(const void *p1, const void *p2)
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{
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return ((struct proc_s *)p1)->ppid - ((struct proc_s *)p2)->ppid;
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}
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static Window focusedWindow()
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static Window focused_window(void)
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{
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Atom type;
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Window focuswin, root, *children;
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@ -93,7 +95,7 @@ static Window focusedWindow()
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return 0;
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}
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static long windowPid(Window focuswin)
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static long pid_of_window(Window win)
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{
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Atom nameAtom = XInternAtom(dpy, "_NET_WM_PID", 1);
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Atom type;
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@ -102,7 +104,7 @@ static long windowPid(Window focuswin)
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unsigned long nitems, after;
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unsigned char *data;
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status = XGetWindowProperty(dpy, focuswin, nameAtom, 0, 1024, 0,
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status = XGetWindowProperty(dpy, win, nameAtom, 0, 1024, 0,
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XA_CARDINAL, &type, &format, &nitems, &after, &data);
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if (status == Success && data) {
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pid = *((long*)data);
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@ -114,7 +116,7 @@ static long windowPid(Window focuswin)
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return pid;
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}
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static char* windowStrings(Window focuswin, long unsigned int *size, char* hint)
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static char* window_strings(Window win, long unsigned int *size, char *hint)
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{
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Atom nameAtom = XInternAtom(dpy, hint, 1);
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Atom type;
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@ -124,7 +126,7 @@ static char* windowStrings(Window focuswin, long unsigned int *size, char* hint)
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unsigned char *data = 0;
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char *ret = NULL;
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if (XGetWindowProperty(dpy, focuswin, nameAtom, 0, 1024, 0, AnyPropertyType,
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if (XGetWindowProperty(dpy, win, nameAtom, 0, 1024, 0, AnyPropertyType,
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&type, &format, size, &after, &data) == Success) {
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if (data) {
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if (type == XA_STRING) {
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@ -144,22 +146,22 @@ static char* windowStrings(Window focuswin, long unsigned int *size, char* hint)
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return ret;
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}
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static void freeProcesses(processes_t p)
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static void processes_free(struct proc_list * p)
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{
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free(p->ps);
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free(p);
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}
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static processes_t getProcesses(void)
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static struct proc_list * processes_list(void)
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{
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processes_t p = NULL;
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struct proc_list * p = NULL;
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#ifdef LINUX
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glob_t globbuf;
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unsigned int i, j, k;
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char line[201] = {0};
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glob("/proc/[0-9]*", GLOB_NOSORT, NULL, &globbuf);
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p = malloc(sizeof(struct processes_s));
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p = malloc(sizeof(struct proc_list));
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p->ps = malloc(globbuf.gl_pathc * sizeof(struct proc_s));
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LOG("Found %zu processes\n", globbuf.gl_pathc);
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@ -173,7 +175,8 @@ static processes_t getProcesses(void)
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tn = fopen(name, "r");
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if (tn == NULL)
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continue;
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fread(line, 200, 1, tn);
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if (fread(line, 200, 1, tn) == 0)
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continue;
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p->ps[j].pid = atoi(strtok(line, " "));
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k = snprintf(p->ps[j].name, 32, "%s", strtok(NULL, " ") + 1);
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p->ps[j].name[k - 1] = 0;
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@ -189,7 +192,7 @@ static processes_t getProcesses(void)
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#endif
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#ifdef BSD
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unsigned int count;
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p = malloc(sizeof(struct processes_s));
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p = malloc(sizeof(struct proc_list));
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struct kinfo_proc *kp;
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size_t len = 0;
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int name[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PROC, 0 };
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@ -225,7 +228,7 @@ static processes_t getProcesses(void)
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return p;
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}
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static int readPath(struct proc_s *proc)
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static int read_process_path(struct proc_s *proc)
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{
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#ifdef LINUX
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char buf[255];
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@ -256,35 +259,40 @@ static int readPath(struct proc_s *proc)
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return 1;
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}
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static int cwdOfDeepestChild(processes_t p, long pid)
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static int child_cwd(struct proc_list * p, struct proc_s *key)
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{
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int i;
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struct proc_s key = { .pid = pid, .ppid = pid},
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*res = NULL, *lastRes = NULL;
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struct proc_s *res = (struct proc_s *)bsearch(key, p->ps, p->n,
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sizeof(struct proc_s), process_ppid_cmp);
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struct proc_s new_key = { .pid = key->ppid };
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do {
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if(res) {
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lastRes = res;
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key.ppid = res->pid;
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}
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res = (struct proc_s *)bsearch(&key, p->ps, p->n,
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sizeof(struct proc_s), ppidCmp);
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} while(res);
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if(!lastRes) {
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return readPath(&key);
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if (res == NULL) {
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LOG("--> %ld pid\n", key->pid);
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return read_process_path(key);
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}
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for(i = 0; lastRes != p->ps && (lastRes - i)->ppid == lastRes->ppid; ++i)
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if(readPath((lastRes - i)))
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for(i = 0; res != p->ps && (res - i)->ppid == res->ppid; ++i) {
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new_key.ppid = (res - i)->pid;
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LOG("--> %ld ppid\n", new_key.ppid);
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if(child_cwd(p, &new_key))
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return 1;
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for(i = 1; lastRes != p->ps + p->n && (lastRes + i)->ppid == lastRes->ppid; ++i)
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if(readPath((lastRes + i)))
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}
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for(i = 1; res != p->ps + p->n && (res + i)->ppid == res->ppid; ++i) {
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new_key.ppid = (res + i)->pid;
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LOG("--> %ld ppid\n", new_key.ppid);
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if(child_cwd(p, &new_key))
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return 1;
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return 0;
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}
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return read_process_path(key);
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}
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int getHomeDirectory()
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static int deepest_child_cwd(struct proc_list * p, long pid)
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{
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struct proc_s key = { .pid = pid, .ppid = pid};
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return child_cwd(p, &key);
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}
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int get_home_dir(void)
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{
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LOG("%s", "getenv $HOME...\n");
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fprintf(stdout, "%s\n", getenv("HOME"));
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@ -296,32 +304,32 @@ int main(int argc, const char *argv[])
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(void)argc;
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(void)argv;
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processes_t p;
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struct proc_list * p;
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long pid;
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int ret = EXIT_SUCCESS;
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Window w = focusedWindow();
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Window w = focused_window();
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if (w == None)
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return getHomeDirectory();
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return get_home_dir();
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pid = windowPid(w);
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p = getProcesses();
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pid = pid_of_window(w);
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p = processes_list();
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if(!p)
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return getHomeDirectory();
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return get_home_dir();
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if(pid != -1)
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qsort(p->ps, p->n, sizeof(struct proc_s), ppidCmp);
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qsort(p->ps, p->n, sizeof(struct proc_s), process_ppid_cmp);
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else {
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long unsigned int size;
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unsigned int i;
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char* strings;
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struct proc_s *res = NULL, key;
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qsort(p->ps, p->n, sizeof(struct proc_s), nameCmp);
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strings = windowStrings(w, &size, "WM_CLASS");
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qsort(p->ps, p->n, sizeof(struct proc_s), process_name_cmp);
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strings = window_strings(w, &size, "WM_CLASS");
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for(i = 0; i < size; i += strlen(strings + i) + 1) {
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LOG("pidof %s\n", strings + i);
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strcpy(key.name, strings + i);
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res = (struct proc_s *)bsearch(&key, p->ps, p->n,
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sizeof(struct proc_s), nameCmp);
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sizeof(struct proc_s), process_name_cmp);
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if(res)
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break;
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}
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@ -332,9 +340,9 @@ int main(int argc, const char *argv[])
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if (size)
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free(strings);
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}
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if (pid == -1 || !cwdOfDeepestChild(p, pid))
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ret = getHomeDirectory();
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freeProcesses(p);
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if (pid == -1 || !deepest_child_cwd(p, pid))
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ret = get_home_dir();
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processes_free(p);
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return ret;
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}
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