st.c 45 KB

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  1. /* See LICENSE for licence details. */
  2. #define _XOPEN_SOURCE 600
  3. #include <ctype.h>
  4. #include <errno.h>
  5. #include <fcntl.h>
  6. #include <limits.h>
  7. #include <locale.h>
  8. #include <stdarg.h>
  9. #include <stdio.h>
  10. #include <stdlib.h>
  11. #include <string.h>
  12. #include <signal.h>
  13. #include <sys/ioctl.h>
  14. #include <sys/select.h>
  15. #include <sys/stat.h>
  16. #include <sys/types.h>
  17. #include <sys/wait.h>
  18. #include <unistd.h>
  19. #include <X11/Xatom.h>
  20. #include <X11/Xlib.h>
  21. #include <X11/Xutil.h>
  22. #include <X11/cursorfont.h>
  23. #include <X11/keysym.h>
  24. #include <sys/time.h>
  25. #include <time.h>
  26. #if defined(__linux)
  27. #include <pty.h>
  28. #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
  29. #include <util.h>
  30. #elif defined(__FreeBSD__) || defined(__DragonFly__)
  31. #include <libutil.h>
  32. #endif
  33. #define USAGE \
  34. "st-" VERSION ", (c) 2010-2011 st engineers\n" \
  35. "usage: st [-t title] [-c class] [-v] [-e command...]\n"
  36. /* Arbitrary sizes */
  37. #define ESC_TITLE_SIZ 256
  38. #define ESC_BUF_SIZ 256
  39. #define ESC_ARG_SIZ 16
  40. #define DRAW_BUF_SIZ 1024
  41. #define UTF_SIZ 4
  42. #define SERRNO strerror(errno)
  43. #define MIN(a, b) ((a) < (b) ? (a) : (b))
  44. #define MAX(a, b) ((a) < (b) ? (b) : (a))
  45. #define LEN(a) (sizeof(a) / sizeof(a[0]))
  46. #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
  47. #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
  48. #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  49. #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  50. #define IS_SET(flag) (term.mode & (flag))
  51. #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
  52. #define X2COL(x) (((x) - BORDER)/xw.cw)
  53. #define Y2ROW(y) (((y) - BORDER)/xw.ch)
  54. /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
  55. enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
  56. enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
  57. CURSOR_SAVE, CURSOR_LOAD };
  58. enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
  59. enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
  60. enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8,
  61. MODE_CRLF=16, MODE_MOUSEBTN=32, MODE_MOUSEMOTION=64, MODE_MOUSE=32|64, MODE_REVERSE=128 };
  62. enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
  63. enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
  64. #undef B0
  65. enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
  66. typedef struct {
  67. char c[UTF_SIZ]; /* character code */
  68. char mode; /* attribute flags */
  69. int fg; /* foreground */
  70. int bg; /* background */
  71. char state; /* state flags */
  72. } Glyph;
  73. typedef Glyph* Line;
  74. typedef struct {
  75. Glyph attr; /* current char attributes */
  76. int x;
  77. int y;
  78. char state;
  79. } TCursor;
  80. /* CSI Escape sequence structs */
  81. /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
  82. typedef struct {
  83. char buf[ESC_BUF_SIZ]; /* raw string */
  84. int len; /* raw string length */
  85. char priv;
  86. int arg[ESC_ARG_SIZ];
  87. int narg; /* nb of args */
  88. char mode;
  89. } CSIEscape;
  90. /* Internal representation of the screen */
  91. typedef struct {
  92. int row; /* nb row */
  93. int col; /* nb col */
  94. Line* line; /* screen */
  95. Line* alt; /* alternate screen */
  96. TCursor c; /* cursor */
  97. int top; /* top scroll limit */
  98. int bot; /* bottom scroll limit */
  99. int mode; /* terminal mode flags */
  100. int esc; /* escape state flags */
  101. char title[ESC_TITLE_SIZ];
  102. int titlelen;
  103. } Term;
  104. /* Purely graphic info */
  105. typedef struct {
  106. Display* dpy;
  107. Colormap cmap;
  108. Window win;
  109. Pixmap buf;
  110. XIM xim;
  111. XIC xic;
  112. int scr;
  113. int w; /* window width */
  114. int h; /* window height */
  115. int bufw; /* pixmap width */
  116. int bufh; /* pixmap height */
  117. int ch; /* char height */
  118. int cw; /* char width */
  119. char state; /* focus, redraw, visible */
  120. } XWindow;
  121. typedef struct {
  122. KeySym k;
  123. unsigned int mask;
  124. char s[ESC_BUF_SIZ];
  125. } Key;
  126. /* Drawing Context */
  127. typedef struct {
  128. unsigned long col[256];
  129. GC gc;
  130. struct {
  131. int ascent;
  132. int descent;
  133. short lbearing;
  134. short rbearing;
  135. XFontSet set;
  136. } font, bfont;
  137. } DC;
  138. /* TODO: use better name for vars... */
  139. typedef struct {
  140. int mode;
  141. int bx, by;
  142. int ex, ey;
  143. struct {int x, y;} b, e;
  144. char *clip;
  145. Atom xtarget;
  146. struct timeval tclick1;
  147. struct timeval tclick2;
  148. } Selection;
  149. #include "config.h"
  150. static void die(const char*, ...);
  151. static void draw(void);
  152. static void drawregion(int, int, int, int);
  153. static void execsh(void);
  154. static void sigchld(int);
  155. static void run(void);
  156. static void csidump(void);
  157. static void csihandle(void);
  158. static void csiparse(void);
  159. static void csireset(void);
  160. static void tclearregion(int, int, int, int);
  161. static void tcursor(int);
  162. static void tdeletechar(int);
  163. static void tdeleteline(int);
  164. static void tinsertblank(int);
  165. static void tinsertblankline(int);
  166. static void tmoveto(int, int);
  167. static void tnew(int, int);
  168. static void tnewline(int);
  169. static void tputtab(void);
  170. static void tputc(char*);
  171. static void treset(void);
  172. static int tresize(int, int);
  173. static void tscrollup(int, int);
  174. static void tscrolldown(int, int);
  175. static void tsetattr(int*, int);
  176. static void tsetchar(char*);
  177. static void tsetscroll(int, int);
  178. static void tswapscreen(void);
  179. static void ttynew(void);
  180. static void ttyread(void);
  181. static void ttyresize(int, int);
  182. static void ttywrite(const char *, size_t);
  183. static void xdraws(char *, Glyph, int, int, int, int);
  184. static void xhints(void);
  185. static void xclear(int, int, int, int);
  186. static void xdrawcursor(void);
  187. static void xinit(void);
  188. static void xloadcols(void);
  189. static void xseturgency(int);
  190. static void xsetsel(char*);
  191. static void xresize(int, int);
  192. static void expose(XEvent *);
  193. static void visibility(XEvent *);
  194. static void unmap(XEvent *);
  195. static char* kmap(KeySym, unsigned int state);
  196. static void kpress(XEvent *);
  197. static void resize(XEvent *);
  198. static void focus(XEvent *);
  199. static void brelease(XEvent *);
  200. static void bpress(XEvent *);
  201. static void bmotion(XEvent *);
  202. static void selnotify(XEvent *);
  203. static void selrequest(XEvent *);
  204. static void selinit(void);
  205. static inline int selected(int, int);
  206. static void selcopy(void);
  207. static void selpaste();
  208. static int utf8decode(char *, long *);
  209. static int utf8encode(long *, char *);
  210. static int utf8size(char *);
  211. static int isfullutf8(char *, int);
  212. static void (*handler[LASTEvent])(XEvent *) = {
  213. [KeyPress] = kpress,
  214. [ConfigureNotify] = resize,
  215. [VisibilityNotify] = visibility,
  216. [UnmapNotify] = unmap,
  217. [Expose] = expose,
  218. [FocusIn] = focus,
  219. [FocusOut] = focus,
  220. [MotionNotify] = bmotion,
  221. [ButtonPress] = bpress,
  222. [ButtonRelease] = brelease,
  223. [SelectionNotify] = selnotify,
  224. [SelectionRequest] = selrequest,
  225. };
  226. /* Globals */
  227. static DC dc;
  228. static XWindow xw;
  229. static Term term;
  230. static CSIEscape escseq;
  231. static int cmdfd;
  232. static pid_t pid;
  233. static Selection sel;
  234. static char **opt_cmd = NULL;
  235. static char *opt_title = NULL;
  236. static char *opt_class = NULL;
  237. int
  238. utf8decode(char *s, long *u) {
  239. unsigned char c;
  240. int i, n, rtn;
  241. rtn = 1;
  242. c = *s;
  243. if(~c&B7) { /* 0xxxxxxx */
  244. *u = c;
  245. return rtn;
  246. } else if((c&(B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
  247. *u = c&(B4|B3|B2|B1|B0);
  248. n = 1;
  249. } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
  250. *u = c&(B3|B2|B1|B0);
  251. n = 2;
  252. } else if((c&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
  253. *u = c&(B2|B1|B0);
  254. n = 3;
  255. } else
  256. goto invalid;
  257. for(i=n,++s; i>0; --i,++rtn,++s) {
  258. c = *s;
  259. if((c&(B7|B6)) != B7) /* 10xxxxxx */
  260. goto invalid;
  261. *u <<= 6;
  262. *u |= c&(B5|B4|B3|B2|B1|B0);
  263. }
  264. if((n == 1 && *u < 0x80) ||
  265. (n == 2 && *u < 0x800) ||
  266. (n == 3 && *u < 0x10000) ||
  267. (*u >= 0xD800 && *u <= 0xDFFF))
  268. goto invalid;
  269. return rtn;
  270. invalid:
  271. *u = 0xFFFD;
  272. return rtn;
  273. }
  274. int
  275. utf8encode(long *u, char *s) {
  276. unsigned char *sp;
  277. unsigned long uc;
  278. int i, n;
  279. sp = (unsigned char*) s;
  280. uc = *u;
  281. if(uc < 0x80) {
  282. *sp = uc; /* 0xxxxxxx */
  283. return 1;
  284. } else if(*u < 0x800) {
  285. *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
  286. n = 1;
  287. } else if(uc < 0x10000) {
  288. *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
  289. n = 2;
  290. } else if(uc <= 0x10FFFF) {
  291. *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
  292. n = 3;
  293. } else {
  294. goto invalid;
  295. }
  296. for(i=n,++sp; i>0; --i,++sp)
  297. *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
  298. return n+1;
  299. invalid:
  300. /* U+FFFD */
  301. *s++ = '\xEF';
  302. *s++ = '\xBF';
  303. *s = '\xBD';
  304. return 3;
  305. }
  306. /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
  307. UTF-8 otherwise return 0 */
  308. int
  309. isfullutf8(char *s, int b) {
  310. unsigned char *c1, *c2, *c3;
  311. c1 = (unsigned char *) s;
  312. c2 = (unsigned char *) ++s;
  313. c3 = (unsigned char *) ++s;
  314. if(b < 1)
  315. return 0;
  316. else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
  317. return 0;
  318. else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
  319. ((b == 1) ||
  320. ((b == 2) && (*c2&(B7|B6)) == B7)))
  321. return 0;
  322. else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
  323. ((b == 1) ||
  324. ((b == 2) && (*c2&(B7|B6)) == B7) ||
  325. ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
  326. return 0;
  327. else
  328. return 1;
  329. }
  330. int
  331. utf8size(char *s) {
  332. unsigned char c = *s;
  333. if(~c&B7)
  334. return 1;
  335. else if((c&(B7|B6|B5)) == (B7|B6))
  336. return 2;
  337. else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
  338. return 3;
  339. else
  340. return 4;
  341. }
  342. void
  343. selinit(void) {
  344. sel.tclick1.tv_sec = 0;
  345. sel.tclick1.tv_usec = 0;
  346. sel.mode = 0;
  347. sel.bx = -1;
  348. sel.clip = NULL;
  349. sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
  350. if(sel.xtarget == None)
  351. sel.xtarget = XA_STRING;
  352. }
  353. static inline int
  354. selected(int x, int y) {
  355. if(sel.ey == y && sel.by == y) {
  356. int bx = MIN(sel.bx, sel.ex);
  357. int ex = MAX(sel.bx, sel.ex);
  358. return BETWEEN(x, bx, ex);
  359. }
  360. return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
  361. || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
  362. }
  363. void
  364. getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
  365. if(b)
  366. *b = e->xbutton.button;
  367. *x = X2COL(e->xbutton.x);
  368. *y = Y2ROW(e->xbutton.y);
  369. sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
  370. sel.b.y = MIN(sel.by, sel.ey);
  371. sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
  372. sel.e.y = MAX(sel.by, sel.ey);
  373. }
  374. void
  375. mousereport(XEvent *e) {
  376. int x = X2COL(e->xbutton.x);
  377. int y = Y2ROW(e->xbutton.y);
  378. int button = e->xbutton.button;
  379. int state = e->xbutton.state;
  380. char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
  381. static int ob, ox, oy;
  382. /* from urxvt */
  383. if(e->xbutton.type == MotionNotify) {
  384. if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
  385. return;
  386. button = ob + 32;
  387. ox = x, oy = y;
  388. } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
  389. button = 3;
  390. } else {
  391. button -= Button1;
  392. if(button >= 3)
  393. button += 64 - 3;
  394. if(e->xbutton.type == ButtonPress) {
  395. ob = button;
  396. ox = x, oy = y;
  397. }
  398. }
  399. buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
  400. + (state & Mod4Mask ? 8 : 0)
  401. + (state & ControlMask ? 16 : 0);
  402. ttywrite(buf, sizeof(buf));
  403. }
  404. void
  405. bpress(XEvent *e) {
  406. if(IS_SET(MODE_MOUSE))
  407. mousereport(e);
  408. else if(e->xbutton.button == Button1) {
  409. sel.mode = 1;
  410. sel.ex = sel.bx = X2COL(e->xbutton.x);
  411. sel.ey = sel.by = Y2ROW(e->xbutton.y);
  412. }
  413. }
  414. void
  415. selcopy(void) {
  416. char *str, *ptr;
  417. int x, y, sz, sl, ls = 0;
  418. if(sel.bx == -1)
  419. str = NULL;
  420. else {
  421. sz = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
  422. ptr = str = malloc(sz);
  423. for(y = 0; y < term.row; y++) {
  424. for(x = 0; x < term.col; x++)
  425. if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y))) {
  426. sl = utf8size(term.line[y][x].c);
  427. memcpy(ptr, term.line[y][x].c, sl);
  428. ptr += sl;
  429. }
  430. if(ls && y < sel.e.y)
  431. *ptr++ = '\n';
  432. }
  433. *ptr = 0;
  434. }
  435. xsetsel(str);
  436. }
  437. void
  438. selnotify(XEvent *e) {
  439. unsigned long nitems, ofs, rem;
  440. int format;
  441. unsigned char *data;
  442. Atom type;
  443. ofs = 0;
  444. do {
  445. if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
  446. False, AnyPropertyType, &type, &format,
  447. &nitems, &rem, &data)) {
  448. fprintf(stderr, "Clipboard allocation failed\n");
  449. return;
  450. }
  451. ttywrite((const char *) data, nitems * format / 8);
  452. XFree(data);
  453. /* number of 32-bit chunks returned */
  454. ofs += nitems * format / 32;
  455. } while(rem > 0);
  456. }
  457. void
  458. selpaste() {
  459. XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
  460. }
  461. void
  462. selrequest(XEvent *e) {
  463. XSelectionRequestEvent *xsre;
  464. XSelectionEvent xev;
  465. Atom xa_targets;
  466. xsre = (XSelectionRequestEvent *) e;
  467. xev.type = SelectionNotify;
  468. xev.requestor = xsre->requestor;
  469. xev.selection = xsre->selection;
  470. xev.target = xsre->target;
  471. xev.time = xsre->time;
  472. /* reject */
  473. xev.property = None;
  474. xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
  475. if(xsre->target == xa_targets) {
  476. /* respond with the supported type */
  477. Atom string = sel.xtarget;
  478. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  479. XA_ATOM, 32, PropModeReplace,
  480. (unsigned char *) &string, 1);
  481. xev.property = xsre->property;
  482. } else if(xsre->target == sel.xtarget) {
  483. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  484. xsre->target, 8, PropModeReplace,
  485. (unsigned char *) sel.clip, strlen(sel.clip));
  486. xev.property = xsre->property;
  487. }
  488. /* all done, send a notification to the listener */
  489. if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
  490. fprintf(stderr, "Error sending SelectionNotify event\n");
  491. }
  492. void
  493. xsetsel(char *str) {
  494. /* register the selection for both the clipboard and the primary */
  495. Atom clipboard;
  496. free(sel.clip);
  497. sel.clip = str;
  498. XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
  499. clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
  500. XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
  501. XFlush(xw.dpy);
  502. }
  503. void
  504. brelease(XEvent *e) {
  505. if(IS_SET(MODE_MOUSE)) {
  506. mousereport(e);
  507. return;
  508. }
  509. if(e->xbutton.button == Button2)
  510. selpaste();
  511. else if(e->xbutton.button == Button1) {
  512. sel.mode = 0;
  513. getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
  514. if(sel.bx == sel.ex && sel.by == sel.ey) {
  515. struct timeval now;
  516. sel.bx = -1;
  517. gettimeofday(&now, NULL);
  518. if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
  519. /* triple click on the line */
  520. sel.b.x = sel.bx = 0;
  521. sel.e.x = sel.ex = term.col;
  522. sel.b.y = sel.e.y = sel.ey;
  523. selcopy();
  524. } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
  525. /* double click to select word */
  526. sel.bx = sel.ex;
  527. while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
  528. term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
  529. sel.b.x = sel.bx;
  530. while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
  531. term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
  532. sel.e.x = sel.ex;
  533. sel.b.y = sel.e.y = sel.ey;
  534. selcopy();
  535. }
  536. } else
  537. selcopy();
  538. }
  539. memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
  540. gettimeofday(&sel.tclick1, NULL);
  541. draw();
  542. }
  543. void
  544. bmotion(XEvent *e) {
  545. if(IS_SET(MODE_MOUSE)) {
  546. mousereport(e);
  547. return;
  548. }
  549. if(sel.mode) {
  550. int oldey = sel.ey, oldex = sel.ex;
  551. getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
  552. if(oldey != sel.ey || oldex != sel.ex) {
  553. int starty = MIN(oldey, sel.ey);
  554. int endy = MAX(oldey, sel.ey);
  555. drawregion(0, (starty > 0 ? starty : 0), term.col, (sel.ey < term.row ? endy+1 : term.row));
  556. }
  557. }
  558. }
  559. void
  560. die(const char *errstr, ...) {
  561. va_list ap;
  562. va_start(ap, errstr);
  563. vfprintf(stderr, errstr, ap);
  564. va_end(ap);
  565. exit(EXIT_FAILURE);
  566. }
  567. void
  568. execsh(void) {
  569. char **args;
  570. char *envshell = getenv("SHELL");
  571. DEFAULT(envshell, "sh");
  572. putenv("TERM="TNAME);
  573. args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
  574. execvp(args[0], args);
  575. exit(EXIT_FAILURE);
  576. }
  577. void
  578. sigchld(int a) {
  579. int stat = 0;
  580. if(waitpid(pid, &stat, 0) < 0)
  581. die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
  582. if(WIFEXITED(stat))
  583. exit(WEXITSTATUS(stat));
  584. else
  585. exit(EXIT_FAILURE);
  586. }
  587. void
  588. ttynew(void) {
  589. int m, s;
  590. /* seems to work fine on linux, openbsd and freebsd */
  591. struct winsize w = {term.row, term.col, 0, 0};
  592. if(openpty(&m, &s, NULL, NULL, &w) < 0)
  593. die("openpty failed: %s\n", SERRNO);
  594. switch(pid = fork()) {
  595. case -1:
  596. die("fork failed\n");
  597. break;
  598. case 0:
  599. setsid(); /* create a new process group */
  600. dup2(s, STDIN_FILENO);
  601. dup2(s, STDOUT_FILENO);
  602. dup2(s, STDERR_FILENO);
  603. if(ioctl(s, TIOCSCTTY, NULL) < 0)
  604. die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
  605. close(s);
  606. close(m);
  607. execsh();
  608. break;
  609. default:
  610. close(s);
  611. cmdfd = m;
  612. signal(SIGCHLD, sigchld);
  613. }
  614. }
  615. void
  616. dump(char c) {
  617. static int col;
  618. fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
  619. if(++col % 10 == 0)
  620. fprintf(stderr, "\n");
  621. }
  622. void
  623. ttyread(void) {
  624. static char buf[BUFSIZ];
  625. static int buflen = 0;
  626. char *ptr;
  627. char s[UTF_SIZ];
  628. int charsize; /* size of utf8 char in bytes */
  629. long utf8c;
  630. int ret;
  631. /* append read bytes to unprocessed bytes */
  632. if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
  633. die("Couldn't read from shell: %s\n", SERRNO);
  634. /* process every complete utf8 char */
  635. buflen += ret;
  636. ptr = buf;
  637. while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
  638. charsize = utf8decode(ptr, &utf8c);
  639. utf8encode(&utf8c, s);
  640. tputc(s);
  641. ptr += charsize;
  642. buflen -= charsize;
  643. }
  644. /* keep any uncomplete utf8 char for the next call */
  645. memmove(buf, ptr, buflen);
  646. }
  647. void
  648. ttywrite(const char *s, size_t n) {
  649. if(write(cmdfd, s, n) == -1)
  650. die("write error on tty: %s\n", SERRNO);
  651. }
  652. void
  653. ttyresize(int x, int y) {
  654. struct winsize w;
  655. w.ws_row = term.row;
  656. w.ws_col = term.col;
  657. w.ws_xpixel = w.ws_ypixel = 0;
  658. if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
  659. fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
  660. }
  661. void
  662. tcursor(int mode) {
  663. static TCursor c;
  664. if(mode == CURSOR_SAVE)
  665. c = term.c;
  666. else if(mode == CURSOR_LOAD)
  667. term.c = c, tmoveto(c.x, c.y);
  668. }
  669. void
  670. treset(void) {
  671. term.c = (TCursor){{
  672. .mode = ATTR_NULL,
  673. .fg = DefaultFG,
  674. .bg = DefaultBG
  675. }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
  676. term.top = 0, term.bot = term.row - 1;
  677. term.mode = MODE_WRAP;
  678. tclearregion(0, 0, term.col-1, term.row-1);
  679. }
  680. void
  681. tnew(int col, int row) {
  682. /* set screen size */
  683. term.row = row, term.col = col;
  684. term.line = malloc(term.row * sizeof(Line));
  685. term.alt = malloc(term.row * sizeof(Line));
  686. for(row = 0; row < term.row; row++) {
  687. term.line[row] = malloc(term.col * sizeof(Glyph));
  688. term.alt [row] = malloc(term.col * sizeof(Glyph));
  689. }
  690. /* setup screen */
  691. treset();
  692. }
  693. void
  694. tswapscreen(void) {
  695. Line* tmp = term.line;
  696. term.line = term.alt;
  697. term.alt = tmp;
  698. term.mode ^= MODE_ALTSCREEN;
  699. }
  700. void
  701. tscrolldown(int orig, int n) {
  702. int i;
  703. Line temp;
  704. LIMIT(n, 0, term.bot-orig+1);
  705. tclearregion(0, term.bot-n+1, term.col-1, term.bot);
  706. for(i = term.bot; i >= orig+n; i--) {
  707. temp = term.line[i];
  708. term.line[i] = term.line[i-n];
  709. term.line[i-n] = temp;
  710. }
  711. }
  712. void
  713. tscrollup(int orig, int n) {
  714. int i;
  715. Line temp;
  716. LIMIT(n, 0, term.bot-orig+1);
  717. tclearregion(0, orig, term.col-1, orig+n-1);
  718. for(i = orig; i <= term.bot-n; i++) {
  719. temp = term.line[i];
  720. term.line[i] = term.line[i+n];
  721. term.line[i+n] = temp;
  722. }
  723. }
  724. void
  725. tnewline(int first_col) {
  726. int y = term.c.y;
  727. if(y == term.bot)
  728. tscrollup(term.top, 1);
  729. else
  730. y++;
  731. tmoveto(first_col ? 0 : term.c.x, y);
  732. }
  733. void
  734. csiparse(void) {
  735. /* int noarg = 1; */
  736. char *p = escseq.buf;
  737. escseq.narg = 0;
  738. if(*p == '?')
  739. escseq.priv = 1, p++;
  740. while(p < escseq.buf+escseq.len) {
  741. while(isdigit(*p)) {
  742. escseq.arg[escseq.narg] *= 10;
  743. escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
  744. }
  745. if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
  746. escseq.narg++, p++;
  747. else {
  748. escseq.mode = *p;
  749. escseq.narg++;
  750. return;
  751. }
  752. }
  753. }
  754. void
  755. tmoveto(int x, int y) {
  756. LIMIT(x, 0, term.col-1);
  757. LIMIT(y, 0, term.row-1);
  758. term.c.state &= ~CURSOR_WRAPNEXT;
  759. term.c.x = x;
  760. term.c.y = y;
  761. }
  762. void
  763. tsetchar(char *c) {
  764. term.line[term.c.y][term.c.x] = term.c.attr;
  765. memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
  766. term.line[term.c.y][term.c.x].state |= GLYPH_SET;
  767. }
  768. void
  769. tclearregion(int x1, int y1, int x2, int y2) {
  770. int x, y, temp;
  771. if(x1 > x2)
  772. temp = x1, x1 = x2, x2 = temp;
  773. if(y1 > y2)
  774. temp = y1, y1 = y2, y2 = temp;
  775. LIMIT(x1, 0, term.col-1);
  776. LIMIT(x2, 0, term.col-1);
  777. LIMIT(y1, 0, term.row-1);
  778. LIMIT(y2, 0, term.row-1);
  779. for(y = y1; y <= y2; y++)
  780. for(x = x1; x <= x2; x++)
  781. term.line[y][x].state = 0;
  782. }
  783. void
  784. tdeletechar(int n) {
  785. int src = term.c.x + n;
  786. int dst = term.c.x;
  787. int size = term.col - src;
  788. if(src >= term.col) {
  789. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  790. return;
  791. }
  792. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
  793. tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
  794. }
  795. void
  796. tinsertblank(int n) {
  797. int src = term.c.x;
  798. int dst = src + n;
  799. int size = term.col - dst;
  800. if(dst >= term.col) {
  801. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  802. return;
  803. }
  804. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
  805. tclearregion(src, term.c.y, dst - 1, term.c.y);
  806. }
  807. void
  808. tinsertblankline(int n) {
  809. if(term.c.y < term.top || term.c.y > term.bot)
  810. return;
  811. tscrolldown(term.c.y, n);
  812. }
  813. void
  814. tdeleteline(int n) {
  815. if(term.c.y < term.top || term.c.y > term.bot)
  816. return;
  817. tscrollup(term.c.y, n);
  818. }
  819. void
  820. tsetattr(int *attr, int l) {
  821. int i;
  822. for(i = 0; i < l; i++) {
  823. switch(attr[i]) {
  824. case 0:
  825. term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
  826. term.c.attr.fg = DefaultFG;
  827. term.c.attr.bg = DefaultBG;
  828. break;
  829. case 1:
  830. term.c.attr.mode |= ATTR_BOLD;
  831. break;
  832. case 4:
  833. term.c.attr.mode |= ATTR_UNDERLINE;
  834. break;
  835. case 7:
  836. term.c.attr.mode |= ATTR_REVERSE;
  837. break;
  838. case 22:
  839. term.c.attr.mode &= ~ATTR_BOLD;
  840. break;
  841. case 24:
  842. term.c.attr.mode &= ~ATTR_UNDERLINE;
  843. break;
  844. case 27:
  845. term.c.attr.mode &= ~ATTR_REVERSE;
  846. break;
  847. case 38:
  848. if(i + 2 < l && attr[i + 1] == 5) {
  849. i += 2;
  850. if(BETWEEN(attr[i], 0, 255))
  851. term.c.attr.fg = attr[i];
  852. else
  853. fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
  854. }
  855. else
  856. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
  857. break;
  858. case 39:
  859. term.c.attr.fg = DefaultFG;
  860. break;
  861. case 48:
  862. if(i + 2 < l && attr[i + 1] == 5) {
  863. i += 2;
  864. if(BETWEEN(attr[i], 0, 255))
  865. term.c.attr.bg = attr[i];
  866. else
  867. fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
  868. }
  869. else
  870. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
  871. break;
  872. case 49:
  873. term.c.attr.bg = DefaultBG;
  874. break;
  875. default:
  876. if(BETWEEN(attr[i], 30, 37))
  877. term.c.attr.fg = attr[i] - 30;
  878. else if(BETWEEN(attr[i], 40, 47))
  879. term.c.attr.bg = attr[i] - 40;
  880. else if(BETWEEN(attr[i], 90, 97))
  881. term.c.attr.fg = attr[i] - 90 + 8;
  882. else if(BETWEEN(attr[i], 100, 107))
  883. term.c.attr.fg = attr[i] - 100 + 8;
  884. else
  885. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
  886. break;
  887. }
  888. }
  889. }
  890. void
  891. tsetscroll(int t, int b) {
  892. int temp;
  893. LIMIT(t, 0, term.row-1);
  894. LIMIT(b, 0, term.row-1);
  895. if(t > b) {
  896. temp = t;
  897. t = b;
  898. b = temp;
  899. }
  900. term.top = t;
  901. term.bot = b;
  902. }
  903. void
  904. csihandle(void) {
  905. switch(escseq.mode) {
  906. default:
  907. unknown:
  908. fprintf(stderr, "erresc: unknown csi ");
  909. csidump();
  910. /* die(""); */
  911. break;
  912. case '@': /* ICH -- Insert <n> blank char */
  913. DEFAULT(escseq.arg[0], 1);
  914. tinsertblank(escseq.arg[0]);
  915. break;
  916. case 'A': /* CUU -- Cursor <n> Up */
  917. case 'e':
  918. DEFAULT(escseq.arg[0], 1);
  919. tmoveto(term.c.x, term.c.y-escseq.arg[0]);
  920. break;
  921. case 'B': /* CUD -- Cursor <n> Down */
  922. DEFAULT(escseq.arg[0], 1);
  923. tmoveto(term.c.x, term.c.y+escseq.arg[0]);
  924. break;
  925. case 'C': /* CUF -- Cursor <n> Forward */
  926. case 'a':
  927. DEFAULT(escseq.arg[0], 1);
  928. tmoveto(term.c.x+escseq.arg[0], term.c.y);
  929. break;
  930. case 'D': /* CUB -- Cursor <n> Backward */
  931. DEFAULT(escseq.arg[0], 1);
  932. tmoveto(term.c.x-escseq.arg[0], term.c.y);
  933. break;
  934. case 'E': /* CNL -- Cursor <n> Down and first col */
  935. DEFAULT(escseq.arg[0], 1);
  936. tmoveto(0, term.c.y+escseq.arg[0]);
  937. break;
  938. case 'F': /* CPL -- Cursor <n> Up and first col */
  939. DEFAULT(escseq.arg[0], 1);
  940. tmoveto(0, term.c.y-escseq.arg[0]);
  941. break;
  942. case 'G': /* CHA -- Move to <col> */
  943. case '`': /* XXX: HPA -- same? */
  944. DEFAULT(escseq.arg[0], 1);
  945. tmoveto(escseq.arg[0]-1, term.c.y);
  946. break;
  947. case 'H': /* CUP -- Move to <row> <col> */
  948. case 'f': /* XXX: HVP -- same? */
  949. DEFAULT(escseq.arg[0], 1);
  950. DEFAULT(escseq.arg[1], 1);
  951. tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
  952. break;
  953. /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
  954. case 'J': /* ED -- Clear screen */
  955. switch(escseq.arg[0]) {
  956. case 0: /* below */
  957. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  958. if(term.c.y < term.row-1)
  959. tclearregion(0, term.c.y+1, term.col-1, term.row-1);
  960. break;
  961. case 1: /* above */
  962. if(term.c.y > 1)
  963. tclearregion(0, 0, term.col-1, term.c.y-1);
  964. tclearregion(0, term.c.y, term.c.x, term.c.y);
  965. break;
  966. case 2: /* all */
  967. tclearregion(0, 0, term.col-1, term.row-1);
  968. break;
  969. default:
  970. goto unknown;
  971. }
  972. break;
  973. case 'K': /* EL -- Clear line */
  974. switch(escseq.arg[0]) {
  975. case 0: /* right */
  976. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  977. break;
  978. case 1: /* left */
  979. tclearregion(0, term.c.y, term.c.x, term.c.y);
  980. break;
  981. case 2: /* all */
  982. tclearregion(0, term.c.y, term.col-1, term.c.y);
  983. break;
  984. }
  985. break;
  986. case 'S': /* SU -- Scroll <n> line up */
  987. DEFAULT(escseq.arg[0], 1);
  988. tscrollup(term.top, escseq.arg[0]);
  989. break;
  990. case 'T': /* SD -- Scroll <n> line down */
  991. DEFAULT(escseq.arg[0], 1);
  992. tscrolldown(term.top, escseq.arg[0]);
  993. break;
  994. case 'L': /* IL -- Insert <n> blank lines */
  995. DEFAULT(escseq.arg[0], 1);
  996. tinsertblankline(escseq.arg[0]);
  997. break;
  998. case 'l': /* RM -- Reset Mode */
  999. if(escseq.priv) {
  1000. switch(escseq.arg[0]) {
  1001. case 1:
  1002. term.mode &= ~MODE_APPKEYPAD;
  1003. break;
  1004. case 5: /* DECSCNM -- Remove reverse video */
  1005. if(IS_SET(MODE_REVERSE)) {
  1006. term.mode &= ~MODE_REVERSE;
  1007. draw();
  1008. }
  1009. break;
  1010. case 7:
  1011. term.mode &= ~MODE_WRAP;
  1012. break;
  1013. case 12: /* att610 -- Stop blinking cursor (IGNORED) */
  1014. break;
  1015. case 20:
  1016. term.mode &= ~MODE_CRLF;
  1017. break;
  1018. case 25:
  1019. term.c.state |= CURSOR_HIDE;
  1020. break;
  1021. case 1000: /* disable X11 xterm mouse reporting */
  1022. term.mode &= ~MODE_MOUSEBTN;
  1023. break;
  1024. case 1002:
  1025. term.mode &= ~MODE_MOUSEMOTION;
  1026. break;
  1027. case 1049: /* = 1047 and 1048 */
  1028. case 47:
  1029. case 1047:
  1030. if(IS_SET(MODE_ALTSCREEN)) {
  1031. tclearregion(0, 0, term.col-1, term.row-1);
  1032. tswapscreen();
  1033. }
  1034. if(escseq.arg[0] != 1049)
  1035. break;
  1036. case 1048:
  1037. tcursor(CURSOR_LOAD);
  1038. break;
  1039. default:
  1040. goto unknown;
  1041. }
  1042. } else {
  1043. switch(escseq.arg[0]) {
  1044. case 4:
  1045. term.mode &= ~MODE_INSERT;
  1046. break;
  1047. default:
  1048. goto unknown;
  1049. }
  1050. }
  1051. break;
  1052. case 'M': /* DL -- Delete <n> lines */
  1053. DEFAULT(escseq.arg[0], 1);
  1054. tdeleteline(escseq.arg[0]);
  1055. break;
  1056. case 'X': /* ECH -- Erase <n> char */
  1057. DEFAULT(escseq.arg[0], 1);
  1058. tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
  1059. break;
  1060. case 'P': /* DCH -- Delete <n> char */
  1061. DEFAULT(escseq.arg[0], 1);
  1062. tdeletechar(escseq.arg[0]);
  1063. break;
  1064. /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
  1065. case 'd': /* VPA -- Move to <row> */
  1066. DEFAULT(escseq.arg[0], 1);
  1067. tmoveto(term.c.x, escseq.arg[0]-1);
  1068. break;
  1069. case 'h': /* SM -- Set terminal mode */
  1070. if(escseq.priv) {
  1071. switch(escseq.arg[0]) {
  1072. case 1:
  1073. term.mode |= MODE_APPKEYPAD;
  1074. break;
  1075. case 5: /* DECSCNM -- Reverve video */
  1076. if(!IS_SET(MODE_REVERSE)) {
  1077. term.mode |= MODE_REVERSE;
  1078. draw();
  1079. }
  1080. break;
  1081. case 7:
  1082. term.mode |= MODE_WRAP;
  1083. break;
  1084. case 20:
  1085. term.mode |= MODE_CRLF;
  1086. break;
  1087. case 12: /* att610 -- Start blinking cursor (IGNORED) */
  1088. /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
  1089. if(escseq.narg > 1 && escseq.arg[1] != 25)
  1090. break;
  1091. case 25:
  1092. term.c.state &= ~CURSOR_HIDE;
  1093. break;
  1094. case 1000: /* 1000,1002: enable xterm mouse report */
  1095. term.mode |= MODE_MOUSEBTN;
  1096. break;
  1097. case 1002:
  1098. term.mode |= MODE_MOUSEMOTION;
  1099. break;
  1100. case 1049: /* = 1047 and 1048 */
  1101. case 47:
  1102. case 1047:
  1103. if(IS_SET(MODE_ALTSCREEN))
  1104. tclearregion(0, 0, term.col-1, term.row-1);
  1105. else
  1106. tswapscreen();
  1107. if(escseq.arg[0] != 1049)
  1108. break;
  1109. case 1048:
  1110. tcursor(CURSOR_SAVE);
  1111. break;
  1112. default: goto unknown;
  1113. }
  1114. } else {
  1115. switch(escseq.arg[0]) {
  1116. case 4:
  1117. term.mode |= MODE_INSERT;
  1118. break;
  1119. default: goto unknown;
  1120. }
  1121. };
  1122. break;
  1123. case 'm': /* SGR -- Terminal attribute (color) */
  1124. tsetattr(escseq.arg, escseq.narg);
  1125. break;
  1126. case 'r': /* DECSTBM -- Set Scrolling Region */
  1127. if(escseq.priv)
  1128. goto unknown;
  1129. else {
  1130. DEFAULT(escseq.arg[0], 1);
  1131. DEFAULT(escseq.arg[1], term.row);
  1132. tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
  1133. tmoveto(0, 0);
  1134. }
  1135. break;
  1136. case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
  1137. tcursor(CURSOR_SAVE);
  1138. break;
  1139. case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
  1140. tcursor(CURSOR_LOAD);
  1141. break;
  1142. }
  1143. }
  1144. void
  1145. csidump(void) {
  1146. int i;
  1147. printf("ESC [ %s", escseq.priv ? "? " : "");
  1148. if(escseq.narg)
  1149. for(i = 0; i < escseq.narg; i++)
  1150. printf("%d ", escseq.arg[i]);
  1151. if(escseq.mode)
  1152. putchar(escseq.mode);
  1153. putchar('\n');
  1154. }
  1155. void
  1156. csireset(void) {
  1157. memset(&escseq, 0, sizeof(escseq));
  1158. }
  1159. void
  1160. tputtab(void) {
  1161. int space = TAB - term.c.x % TAB;
  1162. tmoveto(term.c.x + space, term.c.y);
  1163. }
  1164. void
  1165. tputc(char *c) {
  1166. char ascii = *c;
  1167. if(term.esc & ESC_START) {
  1168. if(term.esc & ESC_CSI) {
  1169. escseq.buf[escseq.len++] = ascii;
  1170. if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
  1171. term.esc = 0;
  1172. csiparse(), csihandle();
  1173. }
  1174. /* TODO: handle other OSC */
  1175. } else if(term.esc & ESC_OSC) {
  1176. if(ascii == ';') {
  1177. term.titlelen = 0;
  1178. term.esc = ESC_START | ESC_TITLE;
  1179. }
  1180. } else if(term.esc & ESC_TITLE) {
  1181. if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
  1182. term.esc = 0;
  1183. term.title[term.titlelen] = '\0';
  1184. XStoreName(xw.dpy, xw.win, term.title);
  1185. } else {
  1186. term.title[term.titlelen++] = ascii;
  1187. }
  1188. } else if(term.esc & ESC_ALTCHARSET) {
  1189. switch(ascii) {
  1190. case '0': /* Line drawing crap */
  1191. term.c.attr.mode |= ATTR_GFX;
  1192. break;
  1193. case 'B': /* Back to regular text */
  1194. term.c.attr.mode &= ~ATTR_GFX;
  1195. break;
  1196. default:
  1197. fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
  1198. }
  1199. term.esc = 0;
  1200. } else {
  1201. switch(ascii) {
  1202. case '[':
  1203. term.esc |= ESC_CSI;
  1204. break;
  1205. case ']':
  1206. term.esc |= ESC_OSC;
  1207. break;
  1208. case '(':
  1209. term.esc |= ESC_ALTCHARSET;
  1210. break;
  1211. case 'D': /* IND -- Linefeed */
  1212. if(term.c.y == term.bot)
  1213. tscrollup(term.top, 1);
  1214. else
  1215. tmoveto(term.c.x, term.c.y+1);
  1216. term.esc = 0;
  1217. break;
  1218. case 'E': /* NEL -- Next line */
  1219. tnewline(1); /* always go to first col */
  1220. term.esc = 0;
  1221. break;
  1222. case 'M': /* RI -- Reverse index */
  1223. if(term.c.y == term.top)
  1224. tscrolldown(term.top, 1);
  1225. else
  1226. tmoveto(term.c.x, term.c.y-1);
  1227. term.esc = 0;
  1228. break;
  1229. case 'c': /* RIS -- Reset to inital state */
  1230. treset();
  1231. term.esc = 0;
  1232. break;
  1233. case '=': /* DECPAM -- Application keypad */
  1234. term.mode |= MODE_APPKEYPAD;
  1235. term.esc = 0;
  1236. break;
  1237. case '>': /* DECPNM -- Normal keypad */
  1238. term.mode &= ~MODE_APPKEYPAD;
  1239. term.esc = 0;
  1240. break;
  1241. case '7': /* DECSC -- Save Cursor */
  1242. tcursor(CURSOR_SAVE);
  1243. term.esc = 0;
  1244. break;
  1245. case '8': /* DECRC -- Restore Cursor */
  1246. tcursor(CURSOR_LOAD);
  1247. term.esc = 0;
  1248. break;
  1249. default:
  1250. fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
  1251. (unsigned char) ascii, isprint(ascii)?ascii:'.');
  1252. term.esc = 0;
  1253. }
  1254. }
  1255. } else {
  1256. switch(ascii) {
  1257. case '\t':
  1258. tputtab();
  1259. break;
  1260. case '\b':
  1261. tmoveto(term.c.x-1, term.c.y);
  1262. break;
  1263. case '\r':
  1264. tmoveto(0, term.c.y);
  1265. break;
  1266. case '\f':
  1267. case '\v':
  1268. case '\n':
  1269. /* go to first col if the mode is set */
  1270. tnewline(IS_SET(MODE_CRLF));
  1271. break;
  1272. case '\a':
  1273. if(!(xw.state & WIN_FOCUSED))
  1274. xseturgency(1);
  1275. break;
  1276. case '\033':
  1277. csireset();
  1278. term.esc = ESC_START;
  1279. break;
  1280. default:
  1281. if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
  1282. tnewline(1); /* always go to first col */
  1283. tsetchar(c);
  1284. if(term.c.x+1 < term.col)
  1285. tmoveto(term.c.x+1, term.c.y);
  1286. else
  1287. term.c.state |= CURSOR_WRAPNEXT;
  1288. }
  1289. }
  1290. }
  1291. int
  1292. tresize(int col, int row) {
  1293. int i, x;
  1294. int minrow = MIN(row, term.row);
  1295. int mincol = MIN(col, term.col);
  1296. int slide = term.c.y - row + 1;
  1297. if(col < 1 || row < 1)
  1298. return 0;
  1299. /* free unneeded rows */
  1300. i = 0;
  1301. if(slide > 0) {
  1302. /* slide screen to keep cursor where we expect it -
  1303. * tscrollup would work here, but we can optimize to
  1304. * memmove because we're freeing the earlier lines */
  1305. for(/* i = 0 */; i < slide; i++) {
  1306. free(term.line[i]);
  1307. free(term.alt[i]);
  1308. }
  1309. memmove(term.line, term.line + slide, row * sizeof(Line));
  1310. memmove(term.alt, term.alt + slide, row * sizeof(Line));
  1311. }
  1312. for(i += row; i < term.row; i++) {
  1313. free(term.line[i]);
  1314. free(term.alt[i]);
  1315. }
  1316. /* resize to new height */
  1317. term.line = realloc(term.line, row * sizeof(Line));
  1318. term.alt = realloc(term.alt, row * sizeof(Line));
  1319. /* resize each row to new width, zero-pad if needed */
  1320. for(i = 0; i < minrow; i++) {
  1321. term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
  1322. term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
  1323. for(x = mincol; x < col; x++) {
  1324. term.line[i][x].state = 0;
  1325. term.alt[i][x].state = 0;
  1326. }
  1327. }
  1328. /* allocate any new rows */
  1329. for(/* i == minrow */; i < row; i++) {
  1330. term.line[i] = calloc(col, sizeof(Glyph));
  1331. term.alt [i] = calloc(col, sizeof(Glyph));
  1332. }
  1333. /* update terminal size */
  1334. term.col = col, term.row = row;
  1335. /* make use of the LIMIT in tmoveto */
  1336. tmoveto(term.c.x, term.c.y);
  1337. /* reset scrolling region */
  1338. tsetscroll(0, row-1);
  1339. return (slide > 0);
  1340. }
  1341. void
  1342. xresize(int col, int row) {
  1343. Pixmap newbuf;
  1344. int oldw, oldh;
  1345. oldw = xw.bufw;
  1346. oldh = xw.bufh;
  1347. xw.bufw = MAX(1, col * xw.cw);
  1348. xw.bufh = MAX(1, row * xw.ch);
  1349. newbuf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
  1350. XCopyArea(xw.dpy, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
  1351. XFreePixmap(xw.dpy, xw.buf);
  1352. XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
  1353. if(xw.bufw > oldw)
  1354. XFillRectangle(xw.dpy, newbuf, dc.gc, oldw, 0,
  1355. xw.bufw-oldw, MIN(xw.bufh, oldh));
  1356. else if(xw.bufw < oldw && (BORDER > 0 || xw.w > xw.bufw))
  1357. XClearArea(xw.dpy, xw.win, BORDER+xw.bufw, BORDER,
  1358. xw.w-xw.bufh-BORDER, BORDER+MIN(xw.bufh, oldh),
  1359. False);
  1360. if(xw.bufh > oldh)
  1361. XFillRectangle(xw.dpy, newbuf, dc.gc, 0, oldh,
  1362. xw.bufw, xw.bufh-oldh);
  1363. else if(xw.bufh < oldh && (BORDER > 0 || xw.h > xw.bufh))
  1364. XClearArea(xw.dpy, xw.win, BORDER, BORDER+xw.bufh,
  1365. xw.w-2*BORDER, xw.h-xw.bufh-BORDER,
  1366. False);
  1367. xw.buf = newbuf;
  1368. }
  1369. void
  1370. xloadcols(void) {
  1371. int i, r, g, b;
  1372. XColor color;
  1373. unsigned long white = WhitePixel(xw.dpy, xw.scr);
  1374. for(i = 0; i < 16; i++) {
  1375. if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
  1376. dc.col[i] = white;
  1377. fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
  1378. } else
  1379. dc.col[i] = color.pixel;
  1380. }
  1381. /* same colors as xterm */
  1382. for(r = 0; r < 6; r++)
  1383. for(g = 0; g < 6; g++)
  1384. for(b = 0; b < 6; b++) {
  1385. color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
  1386. color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
  1387. color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
  1388. if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
  1389. dc.col[i] = white;
  1390. fprintf(stderr, "Could not allocate color %d\n", i);
  1391. } else
  1392. dc.col[i] = color.pixel;
  1393. i++;
  1394. }
  1395. for(r = 0; r < 24; r++, i++) {
  1396. color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
  1397. if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
  1398. dc.col[i] = white;
  1399. fprintf(stderr, "Could not allocate color %d\n", i);
  1400. } else
  1401. dc.col[i] = color.pixel;
  1402. }
  1403. }
  1404. void
  1405. xclear(int x1, int y1, int x2, int y2) {
  1406. XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
  1407. XFillRectangle(xw.dpy, xw.buf, dc.gc,
  1408. x1 * xw.cw, y1 * xw.ch,
  1409. (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
  1410. }
  1411. void
  1412. xhints(void) {
  1413. XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
  1414. XWMHints wm = {.flags = InputHint, .input = 1};
  1415. XSizeHints size = {
  1416. .flags = PSize | PResizeInc | PBaseSize,
  1417. .height = xw.h,
  1418. .width = xw.w,
  1419. .height_inc = xw.ch,
  1420. .width_inc = xw.cw,
  1421. .base_height = 2*BORDER,
  1422. .base_width = 2*BORDER,
  1423. };
  1424. XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
  1425. }
  1426. XFontSet
  1427. xinitfont(char *fontstr) {
  1428. XFontSet set;
  1429. char *def, **missing;
  1430. int n;
  1431. missing = NULL;
  1432. set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
  1433. if(missing) {
  1434. while(n--)
  1435. fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
  1436. XFreeStringList(missing);
  1437. }
  1438. return set;
  1439. }
  1440. void
  1441. xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
  1442. XFontStruct **xfonts;
  1443. char **font_names;
  1444. int i, n;
  1445. *ascent = *descent = *lbearing = *rbearing = 0;
  1446. n = XFontsOfFontSet(set, &xfonts, &font_names);
  1447. for(i = 0; i < n; i++) {
  1448. *ascent = MAX(*ascent, (*xfonts)->ascent);
  1449. *descent = MAX(*descent, (*xfonts)->descent);
  1450. *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
  1451. *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
  1452. xfonts++;
  1453. }
  1454. }
  1455. void
  1456. initfonts(char *fontstr, char *bfontstr) {
  1457. if((dc.font.set = xinitfont(fontstr)) == NULL ||
  1458. (dc.bfont.set = xinitfont(bfontstr)) == NULL)
  1459. die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
  1460. xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
  1461. &dc.font.lbearing, &dc.font.rbearing);
  1462. xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
  1463. &dc.bfont.lbearing, &dc.bfont.rbearing);
  1464. }
  1465. void
  1466. xinit(void) {
  1467. XSetWindowAttributes attrs;
  1468. Cursor cursor;
  1469. if(!(xw.dpy = XOpenDisplay(NULL)))
  1470. die("Can't open display\n");
  1471. xw.scr = XDefaultScreen(xw.dpy);
  1472. /* font */
  1473. initfonts(FONT, BOLDFONT);
  1474. /* XXX: Assuming same size for bold font */
  1475. xw.cw = dc.font.rbearing - dc.font.lbearing;
  1476. xw.ch = dc.font.ascent + dc.font.descent;
  1477. /* colors */
  1478. xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
  1479. xloadcols();
  1480. /* window - default size */
  1481. xw.bufh = 24 * xw.ch;
  1482. xw.bufw = 80 * xw.cw;
  1483. xw.h = xw.bufh + 2*BORDER;
  1484. xw.w = xw.bufw + 2*BORDER;
  1485. attrs.background_pixel = dc.col[DefaultBG];
  1486. attrs.border_pixel = dc.col[DefaultBG];
  1487. attrs.bit_gravity = NorthWestGravity;
  1488. attrs.event_mask = FocusChangeMask | KeyPressMask
  1489. | ExposureMask | VisibilityChangeMask | StructureNotifyMask
  1490. | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
  1491. attrs.colormap = xw.cmap;
  1492. xw.win = XCreateWindow(xw.dpy, XRootWindow(xw.dpy, xw.scr), 0, 0,
  1493. xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
  1494. XDefaultVisual(xw.dpy, xw.scr),
  1495. CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
  1496. | CWColormap,
  1497. &attrs);
  1498. xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
  1499. /* input methods */
  1500. xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
  1501. xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
  1502. | XIMStatusNothing, XNClientWindow, xw.win,
  1503. XNFocusWindow, xw.win, NULL);
  1504. /* gc */
  1505. dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
  1506. /* white cursor, black outline */
  1507. cursor = XCreateFontCursor(xw.dpy, XC_xterm);
  1508. XDefineCursor(xw.dpy, xw.win, cursor);
  1509. XRecolorCursor(xw.dpy, cursor,
  1510. &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
  1511. &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
  1512. XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
  1513. XMapWindow(xw.dpy, xw.win);
  1514. xhints();
  1515. XSync(xw.dpy, 0);
  1516. }
  1517. void
  1518. xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
  1519. unsigned long xfg = dc.col[base.fg], xbg = dc.col[base.bg], temp;
  1520. int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
  1521. int i;
  1522. /* only switch default fg/bg if term is in RV mode */
  1523. if(IS_SET(MODE_REVERSE)) {
  1524. if(base.fg == DefaultFG)
  1525. xfg = dc.col[DefaultBG];
  1526. if(base.bg == DefaultBG)
  1527. xbg = dc.col[DefaultFG];
  1528. }
  1529. if(base.mode & ATTR_REVERSE)
  1530. temp = xfg, xfg = xbg, xbg = temp;
  1531. XSetBackground(xw.dpy, dc.gc, xbg);
  1532. XSetForeground(xw.dpy, dc.gc, xfg);
  1533. if(base.mode & ATTR_GFX) {
  1534. for(i = 0; i < bytelen; i++) {
  1535. char c = gfx[(unsigned int)s[i] % 256];
  1536. if(c)
  1537. s[i] = c;
  1538. else if(s[i] > 0x5f)
  1539. s[i] -= 0x5f;
  1540. }
  1541. }
  1542. XmbDrawImageString(xw.dpy, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.set : dc.font.set,
  1543. dc.gc, winx, winy, s, bytelen);
  1544. if(base.mode & ATTR_UNDERLINE)
  1545. XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
  1546. }
  1547. void
  1548. xdrawcursor(void) {
  1549. static int oldx = 0;
  1550. static int oldy = 0;
  1551. int sl;
  1552. Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
  1553. LIMIT(oldx, 0, term.col-1);
  1554. LIMIT(oldy, 0, term.row-1);
  1555. if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
  1556. memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
  1557. /* remove the old cursor */
  1558. if(term.line[oldy][oldx].state & GLYPH_SET) {
  1559. sl = utf8size(term.line[oldy][oldx].c);
  1560. xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
  1561. } else
  1562. xclear(oldx, oldy, oldx, oldy);
  1563. /* draw the new one */
  1564. if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
  1565. sl = utf8size(g.c);
  1566. if(IS_SET(MODE_REVERSE))
  1567. g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
  1568. xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
  1569. oldx = term.c.x, oldy = term.c.y;
  1570. }
  1571. }
  1572. void
  1573. draw() {
  1574. drawregion(0, 0, term.col, term.row);
  1575. }
  1576. void
  1577. drawregion(int x1, int y1, int x2, int y2) {
  1578. int ic, ib, x, y, ox, sl;
  1579. Glyph base, new;
  1580. char buf[DRAW_BUF_SIZ];
  1581. if(!(xw.state & WIN_VISIBLE))
  1582. return;
  1583. xclear(x1, y1, x2-1, y2-1);
  1584. for(y = y1; y < y2; y++) {
  1585. base = term.line[y][0];
  1586. ic = ib = ox = 0;
  1587. for(x = x1; x < x2; x++) {
  1588. new = term.line[y][x];
  1589. if(sel.bx != -1 && *(new.c) && selected(x, y))
  1590. new.mode ^= ATTR_REVERSE;
  1591. if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
  1592. ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
  1593. xdraws(buf, base, ox, y, ic, ib);
  1594. ic = ib = 0;
  1595. }
  1596. if(new.state & GLYPH_SET) {
  1597. if(ib == 0) {
  1598. ox = x;
  1599. base = new;
  1600. }
  1601. sl = utf8size(new.c);
  1602. memcpy(buf+ib, new.c, sl);
  1603. ib += sl;
  1604. ++ic;
  1605. }
  1606. }
  1607. if(ib > 0)
  1608. xdraws(buf, base, ox, y, ic, ib);
  1609. }
  1610. xdrawcursor();
  1611. XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
  1612. }
  1613. void
  1614. expose(XEvent *ev) {
  1615. XExposeEvent *e = &ev->xexpose;
  1616. if(xw.state & WIN_REDRAW) {
  1617. if(!e->count) {
  1618. xw.state &= ~WIN_REDRAW;
  1619. draw();
  1620. }
  1621. } else
  1622. XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
  1623. e->width, e->height, e->x, e->y);
  1624. }
  1625. void
  1626. visibility(XEvent *ev) {
  1627. XVisibilityEvent *e = &ev->xvisibility;
  1628. if(e->state == VisibilityFullyObscured)
  1629. xw.state &= ~WIN_VISIBLE;
  1630. else if(!(xw.state & WIN_VISIBLE))
  1631. /* need a full redraw for next Expose, not just a buf copy */
  1632. xw.state |= WIN_VISIBLE | WIN_REDRAW;
  1633. }
  1634. void
  1635. unmap(XEvent *ev) {
  1636. xw.state &= ~WIN_VISIBLE;
  1637. }
  1638. void
  1639. xseturgency(int add) {
  1640. XWMHints *h = XGetWMHints(xw.dpy, xw.win);
  1641. h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
  1642. XSetWMHints(xw.dpy, xw.win, h);
  1643. XFree(h);
  1644. }
  1645. void
  1646. focus(XEvent *ev) {
  1647. if(ev->type == FocusIn) {
  1648. xw.state |= WIN_FOCUSED;
  1649. xseturgency(0);
  1650. } else
  1651. xw.state &= ~WIN_FOCUSED;
  1652. draw();
  1653. }
  1654. char*
  1655. kmap(KeySym k, unsigned int state) {
  1656. int i;
  1657. for(i = 0; i < LEN(key); i++)
  1658. if(key[i].k == k && (key[i].mask == 0 || key[i].mask & state))
  1659. return (char*)key[i].s;
  1660. return NULL;
  1661. }
  1662. void
  1663. kpress(XEvent *ev) {
  1664. XKeyEvent *e = &ev->xkey;
  1665. KeySym ksym;
  1666. char buf[32];
  1667. char *customkey;
  1668. int len;
  1669. int meta;
  1670. int shift;
  1671. Status status;
  1672. meta = e->state & Mod1Mask;
  1673. shift = e->state & ShiftMask;
  1674. len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
  1675. /* 1. custom keys from config.h */
  1676. if((customkey = kmap(ksym, e->state)))
  1677. ttywrite(customkey, strlen(customkey));
  1678. /* 2. hardcoded (overrides X lookup) */
  1679. else
  1680. switch(ksym) {
  1681. case XK_Up:
  1682. case XK_Down:
  1683. case XK_Left:
  1684. case XK_Right:
  1685. /* XXX: shift up/down doesn't work */
  1686. sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
  1687. ttywrite(buf, 3);
  1688. break;
  1689. case XK_Insert:
  1690. if(shift)
  1691. selpaste();
  1692. break;
  1693. case XK_Return:
  1694. if(IS_SET(MODE_CRLF))
  1695. ttywrite("\r\n", 2);
  1696. else
  1697. ttywrite("\r", 1);
  1698. break;
  1699. /* 3. X lookup */
  1700. default:
  1701. if(len > 0) {
  1702. if(meta && len == 1)
  1703. ttywrite("\033", 1);
  1704. ttywrite(buf, len);
  1705. }
  1706. break;
  1707. }
  1708. }
  1709. void
  1710. resize(XEvent *e) {
  1711. int col, row;
  1712. if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
  1713. return;
  1714. xw.w = e->xconfigure.width;
  1715. xw.h = e->xconfigure.height;
  1716. col = (xw.w - 2*BORDER) / xw.cw;
  1717. row = (xw.h - 2*BORDER) / xw.ch;
  1718. if(col == term.col && row == term.row)
  1719. return;
  1720. if(tresize(col, row))
  1721. draw();
  1722. ttyresize(col, row);
  1723. xresize(col, row);
  1724. }
  1725. void
  1726. run(void) {
  1727. XEvent ev;
  1728. fd_set rfd;
  1729. int xfd = XConnectionNumber(xw.dpy);
  1730. for(;;) {
  1731. FD_ZERO(&rfd);
  1732. FD_SET(cmdfd, &rfd);
  1733. FD_SET(xfd, &rfd);
  1734. if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
  1735. if(errno == EINTR)
  1736. continue;
  1737. die("select failed: %s\n", SERRNO);
  1738. }
  1739. if(FD_ISSET(cmdfd, &rfd)) {
  1740. ttyread();
  1741. draw();
  1742. }
  1743. while(XPending(xw.dpy)) {
  1744. XNextEvent(xw.dpy, &ev);
  1745. if(XFilterEvent(&ev, xw.win))
  1746. continue;
  1747. if(handler[ev.type])
  1748. (handler[ev.type])(&ev);
  1749. }
  1750. }
  1751. }
  1752. int
  1753. main(int argc, char *argv[]) {
  1754. int i;
  1755. for(i = 1; i < argc; i++) {
  1756. switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
  1757. case 't':
  1758. if(++i < argc) opt_title = argv[i];
  1759. break;
  1760. case 'c':
  1761. if(++i < argc) opt_class = argv[i];
  1762. break;
  1763. case 'e':
  1764. /* eat every remaining arguments */
  1765. if(++i < argc) opt_cmd = &argv[i];
  1766. goto run;
  1767. case 'v':
  1768. default:
  1769. die(USAGE);
  1770. }
  1771. }
  1772. run:
  1773. setlocale(LC_CTYPE, "");
  1774. tnew(80, 24);
  1775. ttynew();
  1776. xinit();
  1777. selinit();
  1778. run();
  1779. return 0;
  1780. }