1 #define _XOPEN_SOURCE_EXTENDED
2 #define _FILE_OFFSET_BITS   64
3 
4 #include <stdlib.h>
5 #include <stdint.h>
6 #include <ctype.h>
7 #include <wchar.h>
8 #include <wctype.h>
9 #include <string.h>
10 #include <sys/types.h>  /* pid_t, ... */
11 #include <stdio.h>
12 #include <limits.h>     /* PATH_MAX */
13 #include <locale.h>     /* setlocale(), LC_ALL */
14 #include <unistd.h>     /* chdir(), getcwd(), read(), close(), ... */
15 #include <dirent.h>     /* DIR, struct dirent, opendir(), ... */
16 #include <sys/stat.h>
17 #include <fcntl.h>      /* open() */
18 #include <sys/wait.h>   /* waitpid() */
19 #include <signal.h>     /* struct sigaction, sigaction() */
20 #include <errno.h>
21 #include <curses.h>
22 
23 #include "config.h"
24 
25 /* String buffers. */
26 #define ROWSZ 256
27 static char ROW[ROWSZ];
28 #define STATUSSZ 256
29 static char STATUS[STATUSSZ];
30 #define INPUTSZ 256
31 static char INPUT[INPUTSZ];
32 
33 /* Argument buffers for execvp(). */
34 #define MAXARGS 256
35 static char *ARGS[MAXARGS];
36 
37 /* Listing view parameters. */
38 #define HEIGHT      (LINES-4)
39 #define STATUSPOS   (COLS-16)
40 
41 /* Listing view flags. */
42 #define SHOW_FILES      0x01u
43 #define SHOW_DIRS       0x02u
44 #define SHOW_HIDDEN     0x04u
45 
46 /* Marks parameters. */
47 #define BULK_INIT   5
48 #define BULK_THRESH 256
49 
50 /* Information associated to each entry in listing. */
51 typedef struct Row {
52     char *name;
53     off_t size;
54     mode_t mode;
55     int islink;
56     int marked;
57 } Row;
58 
59 /* Dynamic array of marked entries. */
60 typedef struct Marks {
61     char dirpath[PATH_MAX];
62     int bulk;
63     int nentries;
64     char **entries;
65 } Marks;
66 
67 /* Line editing state. */
68 typedef struct Edit {
69     wchar_t buffer[INPUTSZ+1];
70     int left, right;
71 } Edit;
72 
73 /* Global state. Some basic info is allocated for ten tabs. */
74 static struct Rover {
75     int tab;
76     int nfiles;
77     int scroll[10];
78     int esel[10];
79     uint8_t flags[10];
80     Row *rows;
81     WINDOW *window;
82     char cwd[10][PATH_MAX];
83     Marks marks;
84     Edit edit;
85     int edit_scroll;
86     volatile sig_atomic_t pending_winch;
87 } rover;
88 
89 /* Macros for accessing global state. */
90 #define ENAME(I)    rover.rows[I].name
91 #define ESIZE(I)    rover.rows[I].size
92 #define EMODE(I)    rover.rows[I].mode
93 #define ISLINK(I)   rover.rows[I].islink
94 #define MARKED(I)   rover.rows[I].marked
95 #define SCROLL      rover.scroll[rover.tab]
96 #define ESEL        rover.esel[rover.tab]
97 #define FLAGS       rover.flags[rover.tab]
98 #define CWD         rover.cwd[rover.tab]
99 
100 /* Helpers. */
101 #define MIN(A, B)   ((A) < (B) ? (A) : (B))
102 #define MAX(A, B)   ((A) > (B) ? (A) : (B))
103 #define ISDIR(E)    (strchr((E), '/') != NULL)
104 
105 /* Line Editing Macros. */
106 #define EDIT_FULL(E)       ((E).left == (E).right)
107 #define EDIT_CAN_LEFT(E)   ((E).left)
108 #define EDIT_CAN_RIGHT(E)  ((E).right < INPUTSZ-1)
109 #define EDIT_LEFT(E)       (E).buffer[(E).right--] = (E).buffer[--(E).left]
110 #define EDIT_RIGHT(E)      (E).buffer[(E).left++] = (E).buffer[++(E).right]
111 #define EDIT_INSERT(E, C)  (E).buffer[(E).left++] = (C)
112 #define EDIT_BACKSPACE(E)  (E).left--
113 #define EDIT_DELETE(E)     (E).right++
114 #define EDIT_CLEAR(E)      do { (E).left = 0; (E).right = INPUTSZ-1; } while(0)
115 
116 typedef enum EditStat {CONTINUE, CONFIRM, CANCEL} EditStat;
117 typedef enum Color {DEFAULT, RED, GREEN, YELLOW, BLUE, CYAN, MAGENTA, WHITE, BLACK} Color;
118 typedef int (*PROCESS)(const char *path);
119 
120 static void
121 init_marks(Marks *marks)
122 {
123     strcpy(marks->dirpath, "");
124     marks->bulk = BULK_INIT;
125     marks->nentries = 0;
126     marks->entries = calloc(marks->bulk, sizeof *marks->entries);
127 }
128 
129 /* Unmark all entries. */
130 static void
131 mark_none(Marks *marks)
132 {
133     int i;
134 
135     strcpy(marks->dirpath, "");
136     for (i = 0; i < marks->bulk && marks->nentries; i++)
137         if (marks->entries[i]) {
138             free(marks->entries[i]);
139             marks->entries[i] = NULL;
140             marks->nentries--;
141         }
142     if (marks->bulk > BULK_THRESH) {
143         /* Reset bulk to free some memory. */
144         free(marks->entries);
145         marks->bulk = BULK_INIT;
146         marks->entries = calloc(marks->bulk, sizeof *marks->entries);
147     }
148 }
149 
150 static void
151 add_mark(Marks *marks, char *dirpath, char *entry)
152 {
153     int i;
154 
155     if (!strcmp(marks->dirpath, dirpath)) {
156         /* Append mark to directory. */
157         if (marks->nentries == marks->bulk) {
158             /* Expand bulk to accomodate new entry. */
159             int extra = marks->bulk / 2;
160             marks->bulk += extra; /* bulk *= 1.5; */
161             marks->entries = realloc(marks->entries,
162                                      marks->bulk * sizeof *marks->entries);
163             memset(&marks->entries[marks->nentries], 0,
164                    extra * sizeof *marks->entries);
165             i = marks->nentries;
166         } else {
167             /* Search for empty slot (there must be one). */
168             for (i = 0; i < marks->bulk; i++)
169                 if (!marks->entries[i])
170                     break;
171         }
172     } else {
173         /* Directory changed. Discard old marks. */
174         mark_none(marks);
175         strcpy(marks->dirpath, dirpath);
176         i = 0;
177     }
178     marks->entries[i] = malloc(strlen(entry) + 1);
179     strcpy(marks->entries[i], entry);
180     marks->nentries++;
181 }
182 
183 static void
184 del_mark(Marks *marks, char *entry)
185 {
186     int i;
187 
188     if (marks->nentries > 1) {
189         for (i = 0; i < marks->bulk; i++)
190             if (marks->entries[i] && !strcmp(marks->entries[i], entry))
191                 break;
192         free(marks->entries[i]);
193         marks->entries[i] = NULL;
194         marks->nentries--;
195     } else
196         mark_none(marks);
197 }
198 
199 static void
200 free_marks(Marks *marks)
201 {
202     int i;
203 
204     for (i = 0; i < marks->bulk && marks->nentries; i++)
205         if (marks->entries[i]) {
206             free(marks->entries[i]);
207             marks->nentries--;
208         }
209     free(marks->entries);
210 }
211 
212 static void
213 handle_winch(int sig)
214 {
215     rover.pending_winch = 1;
216 }
217 
218 static void
219 enable_handlers()
220 {
221     struct sigaction sa;
222 
223     memset(&sa, 0, sizeof (struct sigaction));
224     sa.sa_handler = handle_winch;
225     sigaction(SIGWINCH, &sa, NULL);
226 }
227 
228 static void
229 disable_handlers()
230 {
231     struct sigaction sa;
232 
233     memset(&sa, 0, sizeof (struct sigaction));
234     sa.sa_handler = SIG_DFL;
235     sigaction(SIGWINCH, &sa, NULL);
236 }
237 
238 static void update_view();
239 
240 /* Handle any signals received since last call. */
241 static void
242 sync_signals()
243 {
244     if (rover.pending_winch) {
245         /* SIGWINCH received: resize application accordingly. */
246         delwin(rover.window);
247         endwin();
248         refresh();
249         clear();
250         rover.window = subwin(stdscr, LINES - 2, COLS, 1, 0);
251         SCROLL = MAX(ESEL - HEIGHT, 0);
252         update_view();
253         rover.pending_winch = 0;
254     }
255 }
256 
257 /* This function must be used in place of getch().
258    It handles signals while waiting for user input. */
259 static int
260 rover_getch()
261 {
262     int ch;
263 
264     while ((ch = getch()) == ERR)
265         sync_signals();
266     return ch;
267 }
268 
269 /* This function must be used in place of get_wch().
270    It handles signals while waiting for user input. */
271 static int
272 rover_get_wch(wint_t *wch)
273 {
274     wint_t ret;
275 
276     while ((ret = get_wch(wch)) == (wint_t) ERR)
277         sync_signals();
278     return ret;
279 }
280 
281 /* Do a fork-exec to external program (e.g. $EDITOR). */
282 static void
283 spawn()
284 {
285     pid_t pid;
286     int status;
287 
288     setenv("RVSEL", rover.nfiles ? ENAME(ESEL) : "", 1);
289     pid = fork();
290     if (pid > 0) {
291         /* fork() succeeded. */
292         disable_handlers();
293         endwin();
294         waitpid(pid, &status, 0);
295         enable_handlers();
296         kill(getpid(), SIGWINCH);
297     } else if (pid == 0) {
298         /* Child process. */
299         execvp(ARGS[0], ARGS);
300     }
301 }
302 
303 /* Curses setup. */
304 static void
305 init_term()
306 {
307     setlocale(LC_ALL, "");
308     initscr();
309     cbreak(); /* Get one character at a time. */
310     timeout(100); /* For getch(). */
311     noecho();
312     nonl(); /* No NL->CR/NL on output. */
313     intrflush(stdscr, FALSE);
314     keypad(stdscr, TRUE);
315     curs_set(FALSE); /* Hide blinking cursor. */
316     if (has_colors()) {
317         short bg;
318         start_color();
319 #ifdef NCURSES_EXT_FUNCS
320         use_default_colors();
321         bg = -1;
322 #else
323         bg = COLOR_BLACK;
324 #endif
325         init_pair(RED, COLOR_RED, bg);
326         init_pair(GREEN, COLOR_GREEN, bg);
327         init_pair(YELLOW, COLOR_YELLOW, bg);
328         init_pair(BLUE, COLOR_BLUE, bg);
329         init_pair(CYAN, COLOR_CYAN, bg);
330         init_pair(MAGENTA, COLOR_MAGENTA, bg);
331         init_pair(WHITE, COLOR_WHITE, bg);
332         init_pair(BLACK, COLOR_BLACK, bg);
333     }
334     atexit((void (*)(void)) endwin);
335     enable_handlers();
336 }
337 
338 /* Update the listing view. */
339 static void
340 update_view()
341 {
342     int i, j;
343     int numsize;
344     int ishidden, isdir;
345     int marking;
346     wchar_t wbuf[PATH_MAX];
347 
348     mvhline(0, 0, ' ', COLS);
349     attr_on(A_BOLD, NULL);
350     color_set(RVC_TABNUM, NULL);
351     mvaddch(0, COLS - 2, rover.tab + '0');
352     attr_off(A_BOLD, NULL);
353     if (rover.marks.nentries) {
354         numsize = snprintf(STATUS, STATUSSZ, "%d", rover.marks.nentries);
355         color_set(RVC_MARKS, NULL);
356         mvaddstr(0, COLS - 3 - numsize, STATUS);
357     } else
358         numsize = -1;
359     color_set(RVC_CWD, NULL);
360     mbstowcs(wbuf, CWD, PATH_MAX);
361     mvaddnwstr(0, 0, wbuf, COLS - 4 - numsize);
362     wcolor_set(rover.window, RVC_BORDER, NULL);
363     wborder(rover.window, 0, 0, 0, 0, 0, 0, 0, 0);
364     /* Selection might not be visible, due to cursor wrapping or window
365        shrinking. In that case, the scroll must be moved to make it visible. */
366     SCROLL = MAX(MIN(SCROLL, ESEL), ESEL - HEIGHT + 1);
367     marking = !strcmp(CWD, rover.marks.dirpath);
368     for (i = 0, j = SCROLL; i < HEIGHT && j < rover.nfiles; i++, j++) {
369         ishidden = ENAME(j)[0] == '.';
370         isdir = S_ISDIR(EMODE(j));
371         if (j == ESEL)
372             wattr_on(rover.window, A_REVERSE, NULL);
373         if (ISLINK(j))
374             wcolor_set(rover.window, RVC_LINK, NULL);
375         else if (ishidden)
376             wcolor_set(rover.window, RVC_HIDDEN, NULL);
377         else if (isdir)
378             wcolor_set(rover.window, RVC_DIR, NULL);
379         else
380             wcolor_set(rover.window, RVC_FILE, NULL);
381         if (!isdir) {
382             char *suffix, *suffixes = "BKMGTPEZY";
383             off_t human_size = ESIZE(j) * 10;
384             int length = mbstowcs(NULL, ENAME(j), 0);
385             for (suffix = suffixes; human_size >= 10240; suffix++)
386                 human_size = (human_size + 512) / 1024;
387             if (*suffix == 'B')
388                 swprintf(wbuf, PATH_MAX, L"%s%*d %c", ENAME(j),
389                          (int) (COLS - length - 6),
390                          (int) human_size / 10, *suffix);
391             else
392                 swprintf(wbuf, PATH_MAX, L"%s%*d.%d %c", ENAME(j),
393                          (int) (COLS - length - 8),
394                          (int) human_size / 10, (int) human_size % 10, *suffix);
395         } else
396             mbstowcs(wbuf, ENAME(j), PATH_MAX);
397         mvwhline(rover.window, i + 1, 1, ' ', COLS - 2);
398         mvwaddnwstr(rover.window, i + 1, 2, wbuf, COLS - 4);
399         if (marking && MARKED(j)) {
400             wcolor_set(rover.window, RVC_MARKS, NULL);
401             mvwaddch(rover.window, i + 1, 1, RVS_MARK);
402         } else
403             mvwaddch(rover.window, i + 1, 1, ' ');
404         if (j == ESEL)
405             wattr_off(rover.window, A_REVERSE, NULL);
406     }
407     for (; i < HEIGHT; i++)
408         mvwhline(rover.window, i + 1, 1, ' ', COLS - 2);
409     if (rover.nfiles > HEIGHT) {
410         int center, height;
411         center = (SCROLL + (HEIGHT / 2)) * HEIGHT / rover.nfiles;
412         height = (HEIGHT-1) * HEIGHT / rover.nfiles;
413         if (!height) height = 1;
414         wcolor_set(rover.window, RVC_SCROLLBAR, NULL);
415         mvwvline(rover.window, center-(height/2)+1, COLS-1, RVS_SCROLLBAR, height);
416     }
417     STATUS[0] = FLAGS & SHOW_FILES  ? 'F' : ' ';
418     STATUS[1] = FLAGS & SHOW_DIRS   ? 'D' : ' ';
419     STATUS[2] = FLAGS & SHOW_HIDDEN ? 'H' : ' ';
420     if (!rover.nfiles)
421         strcpy(ROW, "0/0");
422     else
423         snprintf(ROW, ROWSZ, "%d/%d", ESEL + 1, rover.nfiles);
424     snprintf(STATUS+3, STATUSSZ-3, "%12s", ROW);
425     color_set(RVC_STATUS, NULL);
426     mvaddstr(LINES - 1, STATUSPOS, STATUS);
427     wrefresh(rover.window);
428 }
429 
430 /* Show a message on the status bar. */
431 static void
432 message(const char *msg, Color color)
433 {
434     int len, pos;
435 
436     len = strlen(msg);
437     pos = (STATUSPOS - len) / 2;
438     attr_on(A_BOLD, NULL);
439     color_set(color, NULL);
440     mvaddstr(LINES - 1, pos, msg);
441     color_set(DEFAULT, NULL);
442     attr_off(A_BOLD, NULL);
443 }
444 
445 /* Clear message area, leaving only status info. */
446 static void
447 clear_message()
448 {
449     mvhline(LINES - 1, 0, ' ', STATUSPOS);
450 }
451 
452 /* Comparison used to sort listing entries. */
453 static int
454 rowcmp(const void *a, const void *b)
455 {
456     int isdir1, isdir2, cmpdir;
457     const Row *r1 = a;
458     const Row *r2 = b;
459     isdir1 = S_ISDIR(r1->mode);
460     isdir2 = S_ISDIR(r2->mode);
461     cmpdir = isdir2 - isdir1;
462     return cmpdir ? cmpdir : strcoll(r1->name, r2->name);
463 }
464 
465 /* Get all entries in current working directory. */
466 static int
467 ls(Row **rowsp, uint8_t flags)
468 {
469     DIR *dp;
470     struct dirent *ep;
471     struct stat statbuf;
472     Row *rows;
473     int i, n;
474 
475     if(!(dp = opendir("."))) return -1;
476     n = -2; /* We don't want the entries "." and "..". */
477     while (readdir(dp)) n++;
478     rewinddir(dp);
479     rows = malloc(n * sizeof *rows);
480     i = 0;
481     while ((ep = readdir(dp))) {
482         if (!strcmp(ep->d_name, ".") || !strcmp(ep->d_name, ".."))
483             continue;
484         if (!(flags & SHOW_HIDDEN) && ep->d_name[0] == '.')
485             continue;
486         lstat(ep->d_name, &statbuf);
487         rows[i].islink = S_ISLNK(statbuf.st_mode);
488         stat(ep->d_name, &statbuf);
489         if (S_ISDIR(statbuf.st_mode)) {
490             if (flags & SHOW_DIRS) {
491                 rows[i].name = malloc(strlen(ep->d_name) + 2);
492                 strcpy(rows[i].name, ep->d_name);
493                 strcat(rows[i].name, "/");
494                 rows[i].mode = statbuf.st_mode;
495                 i++;
496             }
497         } else if (flags & SHOW_FILES) {
498             rows[i].name = malloc(strlen(ep->d_name) + 1);
499             strcpy(rows[i].name, ep->d_name);
500             rows[i].size = statbuf.st_size;
501             rows[i].mode = statbuf.st_mode;
502             i++;
503         }
504     }
505     n = i; /* Ignore unused space in array caused by filters. */
506     qsort(rows, n, sizeof (*rows), rowcmp);
507     closedir(dp);
508     *rowsp = rows;
509     return n;
510 }
511 
512 static void
513 free_rows(Row **rowsp, int nfiles)
514 {
515     int i;
516 
517     for (i = 0; i < nfiles; i++)
518         free((*rowsp)[i].name);
519     free(*rowsp);
520     *rowsp = NULL;
521 }
522 
523 /* Change working directory to the path in CWD. */
524 static void
525 cd(int reset)
526 {
527     int i, j;
528 
529     message("Loading...", CYAN);
530     refresh();
531     if (reset) ESEL = SCROLL = 0;
532     chdir(CWD);
533     if (rover.nfiles)
534         free_rows(&rover.rows, rover.nfiles);
535     rover.nfiles = ls(&rover.rows, FLAGS);
536     if (!strcmp(CWD, rover.marks.dirpath)) {
537         for (i = 0; i < rover.nfiles; i++) {
538             for (j = 0; j < rover.marks.bulk; j++)
539                 if (
540                     rover.marks.entries[j] &&
541                     !strcmp(rover.marks.entries[j], ENAME(i))
542                 )
543                     break;
544             MARKED(i) = j < rover.marks.bulk;
545         }
546     } else
547         for (i = 0; i < rover.nfiles; i++)
548             MARKED(i) = 0;
549     clear_message();
550     update_view();
551 }
552 
553 /* Select a target entry, if it is present. */
554 static void
555 try_to_sel(const char *target)
556 {
557     ESEL = 0;
558     if (!ISDIR(target))
559         while ((ESEL+1) < rover.nfiles && S_ISDIR(EMODE(ESEL)))
560             ESEL++;
561     while ((ESEL+1) < rover.nfiles && strcoll(ENAME(ESEL), target) < 0)
562         ESEL++;
563     if (rover.nfiles > HEIGHT) {
564         SCROLL = ESEL - (HEIGHT / 2);
565         SCROLL = MIN(MAX(SCROLL, 0), rover.nfiles - HEIGHT);
566     }
567 }
568 
569 /* Reload CWD, but try to keep selection. */
570 static void
571 reload()
572 {
573     if (rover.nfiles) {
574         strcpy(INPUT, ENAME(ESEL));
575         cd(1);
576         try_to_sel(INPUT);
577         update_view();
578     } else
579         cd(1);
580 }
581 
582 /* Recursively process a source directory using CWD as destination root.
583    For each node (i.e. directory), do the following:
584     1. call pre(destination);
585     2. call proc() on every child leaf (i.e. files);
586     3. recurse into every child node;
587     4. call pos(source).
588    E.g. to move directory /src/ (and all its contents) inside /dst/:
589     strcpy(CWD, "/dst/");
590     process_dir(adddir, movfile, deldir, "/src/"); */
591 static int
592 process_dir(PROCESS pre, PROCESS proc, PROCESS pos, const char *path)
593 {
594     int ret;
595     DIR *dp;
596     struct dirent *ep;
597     struct stat statbuf;
598     char subpath[PATH_MAX];
599 
600     ret = 0;
601     if (pre) {
602         char dstpath[PATH_MAX];
603         strcpy(dstpath, CWD);
604         strcat(dstpath, path + strlen(rover.marks.dirpath));
605         ret |= pre(dstpath);
606     }
607     if(!(dp = opendir(path))) return -1;
608     while ((ep = readdir(dp))) {
609         if (!strcmp(ep->d_name, ".") || !strcmp(ep->d_name, ".."))
610             continue;
611         snprintf(subpath, PATH_MAX, "%s%s", path, ep->d_name);
612         stat(subpath, &statbuf);
613         if (S_ISDIR(statbuf.st_mode)) {
614             strcat(subpath, "/");
615             ret |= process_dir(pre, proc, pos, subpath);
616         } else
617             ret |= proc(subpath);
618     }
619     closedir(dp);
620     if (pos) ret |= pos(path);
621     return ret;
622 }
623 
624 /* Process all marked entries using CWD as destination root.
625    All marked entries that are directories will be recursively processed.
626    See process_dir() for details on the parameters. */
627 static void
628 process_marked(PROCESS pre, PROCESS proc, PROCESS pos)
629 {
630     int i, ret;
631     char path[PATH_MAX];
632 
633     clear_message();
634     message("Processing...", CYAN);
635     refresh();
636     for (i = 0; i < rover.marks.bulk; i++)
637         if (rover.marks.entries[i]) {
638             ret = 0;
639             snprintf(path, PATH_MAX, "%s%s", rover.marks.dirpath, rover.marks.entries[i]);
640             if (ISDIR(rover.marks.entries[i])) {
641                 if (!strncmp(path, CWD, strlen(path)))
642                     ret = -1;
643                 else
644                     ret = process_dir(pre, proc, pos, path);
645             } else
646                 ret = proc(path);
647             if (!ret) del_mark(&rover.marks, rover.marks.entries[i]);
648         }
649     reload();
650     if (!rover.marks.nentries)
651         message("Done.", GREEN);
652     else
653         message("Some errors occured.", RED);
654 }
655 
656 /* Wrappers for file operations. */
657 static PROCESS delfile = unlink;
658 static PROCESS deldir = rmdir;
659 static int addfile(const char *path) {
660     /* Using creat(2) because mknod(2) doesn't seem to be portable. */
661     int ret;
662 
663     ret = creat(path, 0644);
664     if (ret < 0) return ret;
665     return close(ret);
666 }
667 static int cpyfile(const char *srcpath) {
668     int src, dst, ret;
669     size_t size;
670     struct stat st;
671     char buf[BUFSIZ];
672     char dstpath[PATH_MAX];
673 
674     ret = src = open(srcpath, O_RDONLY);
675     if (ret < 0) return ret;
676     ret = fstat(src, &st);
677     if (ret < 0) return ret;
678     strcpy(dstpath, CWD);
679     strcat(dstpath, srcpath + strlen(rover.marks.dirpath));
680     ret = dst = creat(dstpath, st.st_mode);
681     if (ret < 0) return ret;
682     while ((size = read(src, buf, BUFSIZ)) > 0) {
683         write(dst, buf, size);
684         sync_signals();
685     }
686     close(src);
687     close(dst);
688     return 0;
689 }
690 static int adddir(const char *path) {
691     int ret;
692     struct stat st;
693 
694     ret = stat(CWD, &st);
695     if (ret < 0) return ret;
696     return mkdir(path, st.st_mode);
697 }
698 static int movfile(const char *srcpath) {
699     int ret;
700     char dstpath[PATH_MAX];
701 
702     strcpy(dstpath, CWD);
703     strcat(dstpath, srcpath + strlen(rover.marks.dirpath));
704     ret = rename(srcpath, dstpath);
705     if (ret < 0 && errno == EXDEV) {
706         ret = cpyfile(srcpath);
707         if (ret < 0) return ret;
708         ret = delfile(srcpath);
709     }
710     return ret;
711 }
712 
713 static void
714 start_line_edit(const char *init_input)
715 {
716     curs_set(TRUE);
717     strncpy(INPUT, init_input, INPUTSZ);
718     rover.edit.left = mbstowcs(rover.edit.buffer, init_input, INPUTSZ);
719     rover.edit.right = INPUTSZ - 1;
720     rover.edit.buffer[INPUTSZ] = L'\0';
721     rover.edit_scroll = 0;
722 }
723 
724 /* Read input and change editing state accordingly. */
725 static EditStat
726 get_line_edit()
727 {
728     wchar_t eraser, killer, wch;
729     int ret, length;
730 
731     ret = rover_get_wch((wint_t *) &wch);
732     erasewchar(&eraser);
733     killwchar(&killer);
734     if (ret == KEY_CODE_YES) {
735         if (wch == KEY_ENTER) {
736             curs_set(FALSE);
737             return CONFIRM;
738         } else if (wch == KEY_LEFT) {
739             if (EDIT_CAN_LEFT(rover.edit)) EDIT_LEFT(rover.edit);
740         } else if (wch == KEY_RIGHT) {
741             if (EDIT_CAN_RIGHT(rover.edit)) EDIT_RIGHT(rover.edit);
742         } else if (wch == KEY_UP) {
743             while (EDIT_CAN_LEFT(rover.edit)) EDIT_LEFT(rover.edit);
744         } else if (wch == KEY_DOWN) {
745             while (EDIT_CAN_RIGHT(rover.edit)) EDIT_RIGHT(rover.edit);
746         } else if (wch == KEY_BACKSPACE) {
747             if (EDIT_CAN_LEFT(rover.edit)) EDIT_BACKSPACE(rover.edit);
748         } else if (wch == KEY_DC) {
749             if (EDIT_CAN_RIGHT(rover.edit)) EDIT_DELETE(rover.edit);
750         }
751     } else {
752         if (wch == L'\r' || wch == L'\n') {
753             curs_set(FALSE);
754             return CONFIRM;
755         } else if (wch == L'\t') {
756             curs_set(FALSE);
757             return CANCEL;
758         } else if (wch == eraser) {
759             if (EDIT_CAN_LEFT(rover.edit)) EDIT_BACKSPACE(rover.edit);
760         } else if (wch == killer) {
761             EDIT_CLEAR(rover.edit);
762             clear_message();
763         } else if (iswprint(wch)) {
764             if (!EDIT_FULL(rover.edit)) EDIT_INSERT(rover.edit, wch);
765         }
766     }
767     /* Encode edit contents in INPUT. */
768     rover.edit.buffer[rover.edit.left] = L'\0';
769     length = wcstombs(INPUT, rover.edit.buffer, INPUTSZ);
770     wcstombs(&INPUT[length], &rover.edit.buffer[rover.edit.right+1],
771              INPUTSZ-length);
772     return CONTINUE;
773 }
774 
775 /* Update line input on the screen. */
776 static void
777 update_input(char *prompt, Color color)
778 {
779     int plen, ilen, maxlen;
780     wchar_t wbuf[COLS];
781 
782     plen = strlen(prompt);
783     ilen = mbstowcs(NULL, INPUT, 0);
784     maxlen = STATUSPOS - plen - 2;
785     if (ilen - rover.edit_scroll < maxlen)
786         rover.edit_scroll = MAX(ilen - maxlen, 0);
787     else if (rover.edit.left > rover.edit_scroll + maxlen - 1)
788         rover.edit_scroll = rover.edit.left - maxlen;
789     else if (rover.edit.left < rover.edit_scroll)
790         rover.edit_scroll = MAX(rover.edit.left - maxlen, 0);
791     color_set(RVC_PROMPT, NULL);
792     mvaddstr(LINES - 1, 0, prompt);
793     color_set(color, NULL);
794     mbstowcs(wbuf, INPUT, COLS);
795     mvaddnwstr(LINES - 1, plen, &wbuf[rover.edit_scroll], maxlen);
796     mvaddch(LINES - 1, plen + MIN(ilen - rover.edit_scroll, maxlen + 1), ' ');
797     color_set(DEFAULT, NULL);
798     if (rover.edit_scroll)
799         mvaddch(LINES - 1, plen - 1, '<');
800     if (ilen > rover.edit_scroll + maxlen)
801         mvaddch(LINES - 1, plen + maxlen, '>');
802     move(LINES - 1, plen + rover.edit.left - rover.edit_scroll);
803 }
804 
805 int
806 main(int argc, char *argv[])
807 {
808     int i, ch;
809     char *program;
810     const char *key;
811     DIR *d;
812     EditStat edit_stat;
813     const char *save_cwd_file = NULL;
814 
815     if (argc >= 2) {
816         if (!strcmp(argv[1], "-v") || !strcmp(argv[1], "--version")) {
817             printf("rover %s\n", RV_VERSION);
818             return 0;
819         } else if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
820             printf(
821                 "Usage: rover [DIRECTORY [DIRECTORY [DIRECTORY [...]]]]\n"
822                 "  or:  rover [OPTION]\n"
823                 "Browse current working directory or the ones specified.\n\n"
824                 "Options:\n"
825                 "  -h, --help       print this help message and exit\n"
826                 "  -v, --version    print program version and exit\n\n"
827                 "See rover(1) for more information.\n\n"
828                 "Rover homepage: <https://github.com/lecram/rover>.\n"
829             );
830             return 0;
831         } else if (argc > 2 && !strcmp(argv[1], "--save-cwd")) {
832             save_cwd_file = argv[2];
833             argc -= 2; argv += 2;
834         }
835     }
836     init_term();
837     rover.nfiles = 0;
838     for (i = 0; i < 10; i++) {
839         rover.esel[i] = rover.scroll[i] = 0;
840         rover.flags[i] = SHOW_FILES | SHOW_DIRS;
841     }
842     strcpy(rover.cwd[0], getenv("HOME"));
843     for (i = 1; i < argc && i < 10; i++) {
844         if ((d = opendir(argv[i]))) {
845             realpath(argv[i], rover.cwd[i]);
846             closedir(d);
847         } else
848             strcpy(rover.cwd[i], rover.cwd[0]);
849     }
850     getcwd(rover.cwd[i], PATH_MAX);
851     for (i++; i < 10; i++)
852         strcpy(rover.cwd[i], rover.cwd[i-1]);
853     for (i = 0; i < 10; i++)
854         if (rover.cwd[i][strlen(rover.cwd[i]) - 1] != '/')
855             strcat(rover.cwd[i], "/");
856     rover.tab = 1;
857     rover.window = subwin(stdscr, LINES - 2, COLS, 1, 0);
858     init_marks(&rover.marks);
859     cd(1);
860     while (1) {
861         ch = rover_getch();
862         key = keyname(ch);
863         clear_message();
864         if (!strcmp(key, RVK_QUIT)) break;
865         else if (ch >= '0' && ch <= '9') {
866             rover.tab = ch - '0';
867             cd(0);
868         } else if (!strcmp(key, RVK_HELP)) {
869             ARGS[0] = "man";
870             ARGS[1] = "rover";
871             ARGS[2] = NULL;
872             spawn();
873         } else if (!strcmp(key, RVK_DOWN)) {
874             if (!rover.nfiles) continue;
875             ESEL = (ESEL + 1) % rover.nfiles;
876             update_view();
877         } else if (!strcmp(key, RVK_UP)) {
878             if (!rover.nfiles) continue;
879             ESEL = ESEL ? ESEL - 1 : rover.nfiles - 1;
880             update_view();
881         } else if (!strcmp(key, RVK_JUMP_DOWN)) {
882             if (!rover.nfiles) continue;
883             ESEL = MIN(ESEL + RV_JUMP, rover.nfiles - 1);
884             if (rover.nfiles > HEIGHT)
885                 SCROLL = MIN(SCROLL + RV_JUMP, rover.nfiles - HEIGHT);
886             update_view();
887         } else if (!strcmp(key, RVK_JUMP_UP)) {
888             if (!rover.nfiles) continue;
889             ESEL = MAX(ESEL - RV_JUMP, 0);
890             SCROLL = MAX(SCROLL - RV_JUMP, 0);
891             update_view();
892         } else if (!strcmp(key, RVK_JUMP_TOP)) {
893             if (!rover.nfiles) continue;
894             ESEL = 0;
895             SCROLL = 0;
896             update_view();
897         } else if (!strcmp(key, RVK_JUMP_BOTTOM)) {
898             if (!rover.nfiles) continue;
899             ESEL = rover.nfiles - 1;
900             SCROLL = MAX(rover.nfiles - 1 - HEIGHT, 0);
901             update_view();
902         } else if (!strcmp(key, RVK_CD_DOWN)) {
903             if (!rover.nfiles || !S_ISDIR(EMODE(ESEL))) continue;
904             strcat(CWD, ENAME(ESEL));
905             cd(1);
906         } else if (!strcmp(key, RVK_CD_UP)) {
907             char *dirname, first;
908             if (!strcmp(CWD, "/")) continue;
909             CWD[strlen(CWD) - 1] = '\0';
910             dirname = strrchr(CWD, '/') + 1;
911             first = dirname[0];
912             dirname[0] = '\0';
913             cd(1);
914             dirname[0] = first;
915             dirname[strlen(dirname)] = '/';
916             try_to_sel(dirname);
917             dirname[0] = '\0';
918             update_view();
919         } else if (!strcmp(key, RVK_HOME)) {
920             strcpy(CWD, getenv("HOME"));
921             if (CWD[strlen(CWD) - 1] != '/')
922                 strcat(CWD, "/");
923             cd(1);
924         } else if (!strcmp(key, RVK_REFRESH)) {
925             reload();
926         } else if (!strcmp(key, RVK_SHELL)) {
927             program = getenv("SHELL");
928             if (program) {
929                 ARGS[0] = program;
930                 ARGS[1] = NULL;
931                 spawn();
932                 reload();
933             }
934         } else if (!strcmp(key, RVK_VIEW)) {
935             if (!rover.nfiles || S_ISDIR(EMODE(ESEL))) continue;
936             program = getenv("PAGER");
937             if (program) {
938                 ARGS[0] = program;
939                 ARGS[1] = ENAME(ESEL);
940                 ARGS[2] = NULL;
941                 spawn();
942             }
943         } else if (!strcmp(key, RVK_EDIT)) {
944             if (!rover.nfiles || S_ISDIR(EMODE(ESEL))) continue;
945             program = getenv("EDITOR");
946             if (program) {
947                 ARGS[0] = program;
948                 ARGS[1] = ENAME(ESEL);
949                 ARGS[2] = NULL;
950                 spawn();
951                 cd(0);
952             }
953         } else if (!strcmp(key, RVK_SEARCH)) {
954             int oldsel, oldscroll, length;
955             char *prompt = "search: ";
956             if (!rover.nfiles) continue;
957             oldsel = ESEL;
958             oldscroll = SCROLL;
959             start_line_edit("");
960             update_input(prompt, DEFAULT);
961             while ((edit_stat = get_line_edit()) == CONTINUE) {
962                 int sel;
963                 Color color = RED;
964                 length = strlen(INPUT);
965                 if (length) {
966                     for (sel = 0; sel < rover.nfiles; sel++)
967                         if (!strncmp(ENAME(sel), INPUT, length))
968                             break;
969                     if (sel < rover.nfiles) {
970                         color = GREEN;
971                         ESEL = sel;
972                         if (rover.nfiles > HEIGHT) {
973                             if (sel < 3)
974                                 SCROLL = 0;
975                             else if (sel - 3 > rover.nfiles - HEIGHT)
976                                 SCROLL = rover.nfiles - HEIGHT;
977                             else
978                                 SCROLL = sel - 3;
979                         }
980                     }
981                 } else {
982                     ESEL = oldsel;
983                     SCROLL = oldscroll;
984                 }
985                 update_view();
986                 update_input(prompt, color);
987             }
988             if (edit_stat == CANCEL) {
989                 ESEL = oldsel;
990                 SCROLL = oldscroll;
991             }
992             clear_message();
993             update_view();
994         } else if (!strcmp(key, RVK_TG_FILES)) {
995             FLAGS ^= SHOW_FILES;
996             reload();
997         } else if (!strcmp(key, RVK_TG_DIRS)) {
998             FLAGS ^= SHOW_DIRS;
999             reload();
1000         } else if (!strcmp(key, RVK_TG_HIDDEN)) {
1001             FLAGS ^= SHOW_HIDDEN;
1002             reload();
1003         } else if (!strcmp(key, RVK_NEW_FILE)) {
1004             int ok = 0;
1005             char *prompt = "new file: ";
1006             start_line_edit("");
1007             update_input(prompt, DEFAULT);
1008             while ((edit_stat = get_line_edit()) == CONTINUE) {
1009                 int length = strlen(INPUT);
1010                 ok = 1;
1011                 for (i = 0; i < rover.nfiles; i++) {
1012                     if (
1013                         !strncmp(ENAME(i), INPUT, length) &&
1014                         (!strcmp(ENAME(i) + length, "") ||
1015                          !strcmp(ENAME(i) + length, "/"))
1016                     ) {
1017                         ok = 0;
1018                         break;
1019                     }
1020                 }
1021                 update_input(prompt, ok ? GREEN : RED);
1022             }
1023             clear_message();
1024             if (edit_stat == CONFIRM && strlen(INPUT)) {
1025                 if (ok) {
1026                     addfile(INPUT);
1027                     cd(1);
1028                     try_to_sel(INPUT);
1029                     update_view();
1030                 } else
1031                     message("File already exists.", RED);
1032             }
1033         } else if (!strcmp(key, RVK_NEW_DIR)) {
1034             int ok = 0;
1035             char *prompt = "new directory: ";
1036             start_line_edit("");
1037             update_input(prompt, DEFAULT);
1038             while ((edit_stat = get_line_edit()) == CONTINUE) {
1039                 int length = strlen(INPUT);
1040                 ok = 1;
1041                 for (i = 0; i < rover.nfiles; i++) {
1042                     if (
1043                         !strncmp(ENAME(i), INPUT, length) &&
1044                         (!strcmp(ENAME(i) + length, "") ||
1045                          !strcmp(ENAME(i) + length, "/"))
1046                     ) {
1047                         ok = 0;
1048                         break;
1049                     }
1050                 }
1051                 update_input(prompt, ok ? GREEN : RED);
1052             }
1053             clear_message();
1054             if (edit_stat == CONFIRM && strlen(INPUT)) {
1055                 if (ok) {
1056                     adddir(INPUT);
1057                     cd(1);
1058                     try_to_sel(INPUT);
1059                     update_view();
1060                 } else
1061                     message("File already exists.", RED);
1062             }
1063         } else if (!strcmp(key, RVK_RENAME)) {
1064             int ok = 0;
1065             char *prompt = "rename: ";
1066             char *last;
1067             int isdir;
1068             strcpy(INPUT, ENAME(ESEL));
1069             last = INPUT + strlen(INPUT) - 1;
1070             if ((isdir = *last == '/'))
1071                 *last = '\0';
1072             start_line_edit(INPUT);
1073             update_input(prompt, RED);
1074             while ((edit_stat = get_line_edit()) == CONTINUE) {
1075                 int length = strlen(INPUT);
1076                 ok = 1;
1077                 for (i = 0; i < rover.nfiles; i++)
1078                     if (
1079                         !strncmp(ENAME(i), INPUT, length) &&
1080                         (!strcmp(ENAME(i) + length, "") ||
1081                          !strcmp(ENAME(i) + length, "/"))
1082                     ) {
1083                         ok = 0;
1084                         break;
1085                     }
1086                 update_input(prompt, ok ? GREEN : RED);
1087             }
1088             clear_message();
1089             if (edit_stat == CONFIRM && strlen(INPUT)) {
1090                 if (isdir)
1091                     strcat(INPUT, "/");
1092                 if (ok) {
1093                     if (!rename(ENAME(ESEL), INPUT) && MARKED(ESEL)) {
1094                         del_mark(&rover.marks, ENAME(ESEL));
1095                         add_mark(&rover.marks, CWD, INPUT);
1096                     }
1097                     cd(1);
1098                     try_to_sel(INPUT);
1099                     update_view();
1100                 } else
1101                     message("File already exists.", RED);
1102             }
1103         } else if (!strcmp(key, RVK_DELETE)) {
1104             if (rover.nfiles) {
1105                 message("Delete selected entry? (Y to confirm)", YELLOW);
1106                 if (rover_getch() == 'Y') {
1107                     const char *name = ENAME(ESEL);
1108                     int ret = S_ISDIR(EMODE(ESEL)) ? deldir(name) : delfile(name);
1109                     reload();
1110                     if (ret)
1111                         message("Could not delete entry.", RED);
1112                 } else
1113                     clear_message();
1114             } else
1115                   message("No entry selected for deletion.", RED);
1116         } else if (!strcmp(key, RVK_TG_MARK)) {
1117             if (MARKED(ESEL))
1118                 del_mark(&rover.marks, ENAME(ESEL));
1119             else
1120                 add_mark(&rover.marks, CWD, ENAME(ESEL));
1121             MARKED(ESEL) = !MARKED(ESEL);
1122             ESEL = (ESEL + 1) % rover.nfiles;
1123             update_view();
1124         } else if (!strcmp(key, RVK_INVMARK)) {
1125             for (i = 0; i < rover.nfiles; i++) {
1126                 if (MARKED(i))
1127                     del_mark(&rover.marks, ENAME(i));
1128                 else
1129                     add_mark(&rover.marks, CWD, ENAME(i));
1130                 MARKED(i) = !MARKED(i);
1131             }
1132             update_view();
1133         } else if (!strcmp(key, RVK_MARKALL)) {
1134             for (i = 0; i < rover.nfiles; i++)
1135                 if (!MARKED(i)) {
1136                     add_mark(&rover.marks, CWD, ENAME(i));
1137                     MARKED(i) = 1;
1138                 }
1139             update_view();
1140         } else if (!strcmp(key, RVK_MARK_DELETE)) {
1141             if (rover.marks.nentries) {
1142                 message("Delete marked entries? (Y to confirm)", YELLOW);
1143                 if (rover_getch() == 'Y')
1144                     process_marked(NULL, delfile, deldir);
1145                 else
1146                     clear_message();
1147             } else
1148                 message("No entries marked for deletion.", RED);
1149         } else if (!strcmp(key, RVK_MARK_COPY)) {
1150             if (rover.marks.nentries)
1151                 process_marked(adddir, cpyfile, NULL);
1152             else
1153                 message("No entries marked for copying.", RED);
1154         } else if (!strcmp(key, RVK_MARK_MOVE)) {
1155             if (rover.marks.nentries)
1156                 process_marked(adddir, movfile, deldir);
1157             else
1158                 message("No entries marked for moving.", RED);
1159         }
1160     }
1161     if (rover.nfiles)
1162         free_rows(&rover.rows, rover.nfiles);
1163     free_marks(&rover.marks);
1164     delwin(rover.window);
1165     if (save_cwd_file != NULL) {
1166         FILE *fd = fopen(save_cwd_file, "w");
1167         fputs(CWD, fd);
1168         fclose(fd);
1169     }
1170     return 0;
1171 }