st.c 46 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] [-w windowid] [-v] [-e command...]\n"
  36. /* XEMBED messages */
  37. #define XEMBED_FOCUS_IN 4
  38. #define XEMBED_FOCUS_OUT 5
  39. /* Arbitrary sizes */
  40. #define ESC_TITLE_SIZ 256
  41. #define ESC_BUF_SIZ 256
  42. #define ESC_ARG_SIZ 16
  43. #define DRAW_BUF_SIZ 1024
  44. #define UTF_SIZ 4
  45. #define SERRNO strerror(errno)
  46. #define MIN(a, b) ((a) < (b) ? (a) : (b))
  47. #define MAX(a, b) ((a) < (b) ? (b) : (a))
  48. #define LEN(a) (sizeof(a) / sizeof(a[0]))
  49. #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
  50. #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
  51. #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  52. #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  53. #define IS_SET(flag) (term.mode & (flag))
  54. #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
  55. #define X2COL(x) (((x) - BORDER)/xw.cw)
  56. #define Y2ROW(y) (((y) - BORDER)/xw.ch)
  57. /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
  58. enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
  59. enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
  60. CURSOR_SAVE, CURSOR_LOAD };
  61. enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
  62. enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
  63. enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8,
  64. MODE_CRLF=16, MODE_MOUSEBTN=32, MODE_MOUSEMOTION=64, MODE_MOUSE=32|64, MODE_REVERSE=128 };
  65. enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
  66. enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
  67. #undef B0
  68. enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
  69. typedef struct {
  70. char c[UTF_SIZ]; /* character code */
  71. char mode; /* attribute flags */
  72. int fg; /* foreground */
  73. int bg; /* background */
  74. char state; /* state flags */
  75. } Glyph;
  76. typedef Glyph* Line;
  77. typedef struct {
  78. Glyph attr; /* current char attributes */
  79. int x;
  80. int y;
  81. char state;
  82. } TCursor;
  83. /* CSI Escape sequence structs */
  84. /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
  85. typedef struct {
  86. char buf[ESC_BUF_SIZ]; /* raw string */
  87. int len; /* raw string length */
  88. char priv;
  89. int arg[ESC_ARG_SIZ];
  90. int narg; /* nb of args */
  91. char mode;
  92. } CSIEscape;
  93. /* Internal representation of the screen */
  94. typedef struct {
  95. int row; /* nb row */
  96. int col; /* nb col */
  97. Line* line; /* screen */
  98. Line* alt; /* alternate screen */
  99. TCursor c; /* cursor */
  100. int top; /* top scroll limit */
  101. int bot; /* bottom scroll limit */
  102. int mode; /* terminal mode flags */
  103. int esc; /* escape state flags */
  104. char title[ESC_TITLE_SIZ];
  105. int titlelen;
  106. } Term;
  107. /* Purely graphic info */
  108. typedef struct {
  109. Display* dpy;
  110. Colormap cmap;
  111. Window win;
  112. Pixmap buf;
  113. XIM xim;
  114. XIC xic;
  115. int scr;
  116. int w; /* window width */
  117. int h; /* window height */
  118. int bufw; /* pixmap width */
  119. int bufh; /* pixmap height */
  120. int ch; /* char height */
  121. int cw; /* char width */
  122. char state; /* focus, redraw, visible */
  123. } XWindow;
  124. typedef struct {
  125. KeySym k;
  126. unsigned int mask;
  127. char s[ESC_BUF_SIZ];
  128. } Key;
  129. /* Drawing Context */
  130. typedef struct {
  131. unsigned long col[256];
  132. GC gc;
  133. struct {
  134. int ascent;
  135. int descent;
  136. short lbearing;
  137. short rbearing;
  138. XFontSet set;
  139. } font, bfont;
  140. } DC;
  141. /* TODO: use better name for vars... */
  142. typedef struct {
  143. int mode;
  144. int bx, by;
  145. int ex, ey;
  146. struct {int x, y;} b, e;
  147. char *clip;
  148. Atom xtarget;
  149. struct timeval tclick1;
  150. struct timeval tclick2;
  151. } Selection;
  152. #include "config.h"
  153. static void die(const char*, ...);
  154. static void draw(void);
  155. static void drawregion(int, int, int, int);
  156. static void execsh(void);
  157. static void sigchld(int);
  158. static void run(void);
  159. static void csidump(void);
  160. static void csihandle(void);
  161. static void csiparse(void);
  162. static void csireset(void);
  163. static void tclearregion(int, int, int, int);
  164. static void tcursor(int);
  165. static void tdeletechar(int);
  166. static void tdeleteline(int);
  167. static void tinsertblank(int);
  168. static void tinsertblankline(int);
  169. static void tmoveto(int, int);
  170. static void tnew(int, int);
  171. static void tnewline(int);
  172. static void tputtab(void);
  173. static void tputc(char*);
  174. static void treset(void);
  175. static int tresize(int, int);
  176. static void tscrollup(int, int);
  177. static void tscrolldown(int, int);
  178. static void tsetattr(int*, int);
  179. static void tsetchar(char*);
  180. static void tsetscroll(int, int);
  181. static void tswapscreen(void);
  182. static void ttynew(void);
  183. static void ttyread(void);
  184. static void ttyresize(int, int);
  185. static void ttywrite(const char *, size_t);
  186. static void xdraws(char *, Glyph, int, int, int, int);
  187. static void xhints(void);
  188. static void xclear(int, int, int, int);
  189. static void xdrawcursor(void);
  190. static void xinit(void);
  191. static void xloadcols(void);
  192. static void xseturgency(int);
  193. static void xsetsel(char*);
  194. static void xresize(int, int);
  195. static void expose(XEvent *);
  196. static void visibility(XEvent *);
  197. static void unmap(XEvent *);
  198. static char* kmap(KeySym, unsigned int state);
  199. static void kpress(XEvent *);
  200. static void cmessage(XEvent *);
  201. static void resize(XEvent *);
  202. static void focus(XEvent *);
  203. static void brelease(XEvent *);
  204. static void bpress(XEvent *);
  205. static void bmotion(XEvent *);
  206. static void selnotify(XEvent *);
  207. static void selrequest(XEvent *);
  208. static void selinit(void);
  209. static inline int selected(int, int);
  210. static void selcopy(void);
  211. static void selpaste();
  212. static int utf8decode(char *, long *);
  213. static int utf8encode(long *, char *);
  214. static int utf8size(char *);
  215. static int isfullutf8(char *, int);
  216. static void (*handler[LASTEvent])(XEvent *) = {
  217. [KeyPress] = kpress,
  218. [ClientMessage] = cmessage,
  219. [ConfigureNotify] = resize,
  220. [VisibilityNotify] = visibility,
  221. [UnmapNotify] = unmap,
  222. [Expose] = expose,
  223. [FocusIn] = focus,
  224. [FocusOut] = focus,
  225. [MotionNotify] = bmotion,
  226. [ButtonPress] = bpress,
  227. [ButtonRelease] = brelease,
  228. [SelectionNotify] = selnotify,
  229. [SelectionRequest] = selrequest,
  230. };
  231. /* Globals */
  232. static DC dc;
  233. static XWindow xw;
  234. static Term term;
  235. static CSIEscape escseq;
  236. static int cmdfd;
  237. static pid_t pid;
  238. static Selection sel;
  239. static char **opt_cmd = NULL;
  240. static char *opt_title = NULL;
  241. static char *opt_embed = NULL;
  242. static char *opt_class = NULL;
  243. static Atom xembedatom;
  244. int
  245. utf8decode(char *s, long *u) {
  246. unsigned char c;
  247. int i, n, rtn;
  248. rtn = 1;
  249. c = *s;
  250. if(~c&B7) { /* 0xxxxxxx */
  251. *u = c;
  252. return rtn;
  253. } else if((c&(B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
  254. *u = c&(B4|B3|B2|B1|B0);
  255. n = 1;
  256. } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
  257. *u = c&(B3|B2|B1|B0);
  258. n = 2;
  259. } else if((c&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
  260. *u = c&(B2|B1|B0);
  261. n = 3;
  262. } else
  263. goto invalid;
  264. for(i=n,++s; i>0; --i,++rtn,++s) {
  265. c = *s;
  266. if((c&(B7|B6)) != B7) /* 10xxxxxx */
  267. goto invalid;
  268. *u <<= 6;
  269. *u |= c&(B5|B4|B3|B2|B1|B0);
  270. }
  271. if((n == 1 && *u < 0x80) ||
  272. (n == 2 && *u < 0x800) ||
  273. (n == 3 && *u < 0x10000) ||
  274. (*u >= 0xD800 && *u <= 0xDFFF))
  275. goto invalid;
  276. return rtn;
  277. invalid:
  278. *u = 0xFFFD;
  279. return rtn;
  280. }
  281. int
  282. utf8encode(long *u, char *s) {
  283. unsigned char *sp;
  284. unsigned long uc;
  285. int i, n;
  286. sp = (unsigned char*) s;
  287. uc = *u;
  288. if(uc < 0x80) {
  289. *sp = uc; /* 0xxxxxxx */
  290. return 1;
  291. } else if(*u < 0x800) {
  292. *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
  293. n = 1;
  294. } else if(uc < 0x10000) {
  295. *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
  296. n = 2;
  297. } else if(uc <= 0x10FFFF) {
  298. *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
  299. n = 3;
  300. } else {
  301. goto invalid;
  302. }
  303. for(i=n,++sp; i>0; --i,++sp)
  304. *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
  305. return n+1;
  306. invalid:
  307. /* U+FFFD */
  308. *s++ = '\xEF';
  309. *s++ = '\xBF';
  310. *s = '\xBD';
  311. return 3;
  312. }
  313. /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
  314. UTF-8 otherwise return 0 */
  315. int
  316. isfullutf8(char *s, int b) {
  317. unsigned char *c1, *c2, *c3;
  318. c1 = (unsigned char *) s;
  319. c2 = (unsigned char *) ++s;
  320. c3 = (unsigned char *) ++s;
  321. if(b < 1)
  322. return 0;
  323. else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
  324. return 0;
  325. else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
  326. ((b == 1) ||
  327. ((b == 2) && (*c2&(B7|B6)) == B7)))
  328. return 0;
  329. else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
  330. ((b == 1) ||
  331. ((b == 2) && (*c2&(B7|B6)) == B7) ||
  332. ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
  333. return 0;
  334. else
  335. return 1;
  336. }
  337. int
  338. utf8size(char *s) {
  339. unsigned char c = *s;
  340. if(~c&B7)
  341. return 1;
  342. else if((c&(B7|B6|B5)) == (B7|B6))
  343. return 2;
  344. else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
  345. return 3;
  346. else
  347. return 4;
  348. }
  349. void
  350. selinit(void) {
  351. sel.tclick1.tv_sec = 0;
  352. sel.tclick1.tv_usec = 0;
  353. sel.mode = 0;
  354. sel.bx = -1;
  355. sel.clip = NULL;
  356. sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
  357. if(sel.xtarget == None)
  358. sel.xtarget = XA_STRING;
  359. }
  360. static inline int
  361. selected(int x, int y) {
  362. if(sel.ey == y && sel.by == y) {
  363. int bx = MIN(sel.bx, sel.ex);
  364. int ex = MAX(sel.bx, sel.ex);
  365. return BETWEEN(x, bx, ex);
  366. }
  367. return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
  368. || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
  369. }
  370. void
  371. getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
  372. if(b)
  373. *b = e->xbutton.button;
  374. *x = X2COL(e->xbutton.x);
  375. *y = Y2ROW(e->xbutton.y);
  376. sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
  377. sel.b.y = MIN(sel.by, sel.ey);
  378. sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
  379. sel.e.y = MAX(sel.by, sel.ey);
  380. }
  381. void
  382. mousereport(XEvent *e) {
  383. int x = X2COL(e->xbutton.x);
  384. int y = Y2ROW(e->xbutton.y);
  385. int button = e->xbutton.button;
  386. int state = e->xbutton.state;
  387. char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
  388. static int ob, ox, oy;
  389. /* from urxvt */
  390. if(e->xbutton.type == MotionNotify) {
  391. if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
  392. return;
  393. button = ob + 32;
  394. ox = x, oy = y;
  395. } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
  396. button = 3;
  397. } else {
  398. button -= Button1;
  399. if(button >= 3)
  400. button += 64 - 3;
  401. if(e->xbutton.type == ButtonPress) {
  402. ob = button;
  403. ox = x, oy = y;
  404. }
  405. }
  406. buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
  407. + (state & Mod4Mask ? 8 : 0)
  408. + (state & ControlMask ? 16 : 0);
  409. ttywrite(buf, sizeof(buf));
  410. }
  411. void
  412. bpress(XEvent *e) {
  413. if(IS_SET(MODE_MOUSE))
  414. mousereport(e);
  415. else if(e->xbutton.button == Button1) {
  416. sel.mode = 1;
  417. sel.ex = sel.bx = X2COL(e->xbutton.x);
  418. sel.ey = sel.by = Y2ROW(e->xbutton.y);
  419. }
  420. }
  421. void
  422. selcopy(void) {
  423. char *str, *ptr;
  424. int x, y, sz, sl, ls = 0;
  425. if(sel.bx == -1)
  426. str = NULL;
  427. else {
  428. sz = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
  429. ptr = str = malloc(sz);
  430. for(y = 0; y < term.row; y++) {
  431. for(x = 0; x < term.col; x++)
  432. if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y))) {
  433. sl = utf8size(term.line[y][x].c);
  434. memcpy(ptr, term.line[y][x].c, sl);
  435. ptr += sl;
  436. }
  437. if(ls && y < sel.e.y)
  438. *ptr++ = '\n';
  439. }
  440. *ptr = 0;
  441. }
  442. xsetsel(str);
  443. }
  444. void
  445. selnotify(XEvent *e) {
  446. unsigned long nitems, ofs, rem;
  447. int format;
  448. unsigned char *data;
  449. Atom type;
  450. ofs = 0;
  451. do {
  452. if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
  453. False, AnyPropertyType, &type, &format,
  454. &nitems, &rem, &data)) {
  455. fprintf(stderr, "Clipboard allocation failed\n");
  456. return;
  457. }
  458. ttywrite((const char *) data, nitems * format / 8);
  459. XFree(data);
  460. /* number of 32-bit chunks returned */
  461. ofs += nitems * format / 32;
  462. } while(rem > 0);
  463. }
  464. void
  465. selpaste() {
  466. XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
  467. }
  468. void
  469. selrequest(XEvent *e) {
  470. XSelectionRequestEvent *xsre;
  471. XSelectionEvent xev;
  472. Atom xa_targets;
  473. xsre = (XSelectionRequestEvent *) e;
  474. xev.type = SelectionNotify;
  475. xev.requestor = xsre->requestor;
  476. xev.selection = xsre->selection;
  477. xev.target = xsre->target;
  478. xev.time = xsre->time;
  479. /* reject */
  480. xev.property = None;
  481. xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
  482. if(xsre->target == xa_targets) {
  483. /* respond with the supported type */
  484. Atom string = sel.xtarget;
  485. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  486. XA_ATOM, 32, PropModeReplace,
  487. (unsigned char *) &string, 1);
  488. xev.property = xsre->property;
  489. } else if(xsre->target == sel.xtarget) {
  490. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  491. xsre->target, 8, PropModeReplace,
  492. (unsigned char *) sel.clip, strlen(sel.clip));
  493. xev.property = xsre->property;
  494. }
  495. /* all done, send a notification to the listener */
  496. if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
  497. fprintf(stderr, "Error sending SelectionNotify event\n");
  498. }
  499. void
  500. xsetsel(char *str) {
  501. /* register the selection for both the clipboard and the primary */
  502. Atom clipboard;
  503. free(sel.clip);
  504. sel.clip = str;
  505. XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
  506. clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
  507. XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
  508. XFlush(xw.dpy);
  509. }
  510. void
  511. brelease(XEvent *e) {
  512. if(IS_SET(MODE_MOUSE)) {
  513. mousereport(e);
  514. return;
  515. }
  516. if(e->xbutton.button == Button2)
  517. selpaste();
  518. else if(e->xbutton.button == Button1) {
  519. sel.mode = 0;
  520. getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
  521. if(sel.bx == sel.ex && sel.by == sel.ey) {
  522. struct timeval now;
  523. sel.bx = -1;
  524. gettimeofday(&now, NULL);
  525. if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
  526. /* triple click on the line */
  527. sel.b.x = sel.bx = 0;
  528. sel.e.x = sel.ex = term.col;
  529. sel.b.y = sel.e.y = sel.ey;
  530. selcopy();
  531. } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
  532. /* double click to select word */
  533. sel.bx = sel.ex;
  534. while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
  535. term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
  536. sel.b.x = sel.bx;
  537. while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
  538. term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
  539. sel.e.x = sel.ex;
  540. sel.b.y = sel.e.y = sel.ey;
  541. selcopy();
  542. }
  543. } else
  544. selcopy();
  545. }
  546. memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
  547. gettimeofday(&sel.tclick1, NULL);
  548. draw();
  549. }
  550. void
  551. bmotion(XEvent *e) {
  552. if(IS_SET(MODE_MOUSE)) {
  553. mousereport(e);
  554. return;
  555. }
  556. if(sel.mode) {
  557. int oldey = sel.ey, oldex = sel.ex;
  558. getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
  559. if(oldey != sel.ey || oldex != sel.ex) {
  560. int starty = MIN(oldey, sel.ey);
  561. int endy = MAX(oldey, sel.ey);
  562. drawregion(0, (starty > 0 ? starty : 0), term.col, (endy < term.row ? endy+1 : term.row));
  563. }
  564. }
  565. }
  566. void
  567. die(const char *errstr, ...) {
  568. va_list ap;
  569. va_start(ap, errstr);
  570. vfprintf(stderr, errstr, ap);
  571. va_end(ap);
  572. exit(EXIT_FAILURE);
  573. }
  574. void
  575. execsh(void) {
  576. char **args;
  577. char *envshell = getenv("SHELL");
  578. DEFAULT(envshell, "sh");
  579. putenv("TERM="TNAME);
  580. args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
  581. execvp(args[0], args);
  582. exit(EXIT_FAILURE);
  583. }
  584. void
  585. sigchld(int a) {
  586. int stat = 0;
  587. if(waitpid(pid, &stat, 0) < 0)
  588. die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
  589. if(WIFEXITED(stat))
  590. exit(WEXITSTATUS(stat));
  591. else
  592. exit(EXIT_FAILURE);
  593. }
  594. void
  595. ttynew(void) {
  596. int m, s;
  597. /* seems to work fine on linux, openbsd and freebsd */
  598. struct winsize w = {term.row, term.col, 0, 0};
  599. if(openpty(&m, &s, NULL, NULL, &w) < 0)
  600. die("openpty failed: %s\n", SERRNO);
  601. switch(pid = fork()) {
  602. case -1:
  603. die("fork failed\n");
  604. break;
  605. case 0:
  606. setsid(); /* create a new process group */
  607. dup2(s, STDIN_FILENO);
  608. dup2(s, STDOUT_FILENO);
  609. dup2(s, STDERR_FILENO);
  610. if(ioctl(s, TIOCSCTTY, NULL) < 0)
  611. die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
  612. close(s);
  613. close(m);
  614. execsh();
  615. break;
  616. default:
  617. close(s);
  618. cmdfd = m;
  619. signal(SIGCHLD, sigchld);
  620. }
  621. }
  622. void
  623. dump(char c) {
  624. static int col;
  625. fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
  626. if(++col % 10 == 0)
  627. fprintf(stderr, "\n");
  628. }
  629. void
  630. ttyread(void) {
  631. static char buf[BUFSIZ];
  632. static int buflen = 0;
  633. char *ptr;
  634. char s[UTF_SIZ];
  635. int charsize; /* size of utf8 char in bytes */
  636. long utf8c;
  637. int ret;
  638. /* append read bytes to unprocessed bytes */
  639. if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
  640. die("Couldn't read from shell: %s\n", SERRNO);
  641. /* process every complete utf8 char */
  642. buflen += ret;
  643. ptr = buf;
  644. while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
  645. charsize = utf8decode(ptr, &utf8c);
  646. utf8encode(&utf8c, s);
  647. tputc(s);
  648. ptr += charsize;
  649. buflen -= charsize;
  650. }
  651. /* keep any uncomplete utf8 char for the next call */
  652. memmove(buf, ptr, buflen);
  653. }
  654. void
  655. ttywrite(const char *s, size_t n) {
  656. if(write(cmdfd, s, n) == -1)
  657. die("write error on tty: %s\n", SERRNO);
  658. }
  659. void
  660. ttyresize(int x, int y) {
  661. struct winsize w;
  662. w.ws_row = term.row;
  663. w.ws_col = term.col;
  664. w.ws_xpixel = w.ws_ypixel = 0;
  665. if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
  666. fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
  667. }
  668. void
  669. tcursor(int mode) {
  670. static TCursor c;
  671. if(mode == CURSOR_SAVE)
  672. c = term.c;
  673. else if(mode == CURSOR_LOAD)
  674. term.c = c, tmoveto(c.x, c.y);
  675. }
  676. void
  677. treset(void) {
  678. term.c = (TCursor){{
  679. .mode = ATTR_NULL,
  680. .fg = DefaultFG,
  681. .bg = DefaultBG
  682. }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
  683. term.top = 0, term.bot = term.row - 1;
  684. term.mode = MODE_WRAP;
  685. tclearregion(0, 0, term.col-1, term.row-1);
  686. }
  687. void
  688. tnew(int col, int row) {
  689. /* set screen size */
  690. term.row = row, term.col = col;
  691. term.line = malloc(term.row * sizeof(Line));
  692. term.alt = malloc(term.row * sizeof(Line));
  693. for(row = 0; row < term.row; row++) {
  694. term.line[row] = malloc(term.col * sizeof(Glyph));
  695. term.alt [row] = malloc(term.col * sizeof(Glyph));
  696. }
  697. /* setup screen */
  698. treset();
  699. }
  700. void
  701. tswapscreen(void) {
  702. Line* tmp = term.line;
  703. term.line = term.alt;
  704. term.alt = tmp;
  705. term.mode ^= MODE_ALTSCREEN;
  706. }
  707. void
  708. tscrolldown(int orig, int n) {
  709. int i;
  710. Line temp;
  711. LIMIT(n, 0, term.bot-orig+1);
  712. tclearregion(0, term.bot-n+1, term.col-1, term.bot);
  713. for(i = term.bot; i >= orig+n; i--) {
  714. temp = term.line[i];
  715. term.line[i] = term.line[i-n];
  716. term.line[i-n] = temp;
  717. }
  718. }
  719. void
  720. tscrollup(int orig, int n) {
  721. int i;
  722. Line temp;
  723. LIMIT(n, 0, term.bot-orig+1);
  724. tclearregion(0, orig, term.col-1, orig+n-1);
  725. for(i = orig; i <= term.bot-n; i++) {
  726. temp = term.line[i];
  727. term.line[i] = term.line[i+n];
  728. term.line[i+n] = temp;
  729. }
  730. }
  731. void
  732. tnewline(int first_col) {
  733. int y = term.c.y;
  734. if(y == term.bot)
  735. tscrollup(term.top, 1);
  736. else
  737. y++;
  738. tmoveto(first_col ? 0 : term.c.x, y);
  739. }
  740. void
  741. csiparse(void) {
  742. /* int noarg = 1; */
  743. char *p = escseq.buf;
  744. escseq.narg = 0;
  745. if(*p == '?')
  746. escseq.priv = 1, p++;
  747. while(p < escseq.buf+escseq.len) {
  748. while(isdigit(*p)) {
  749. escseq.arg[escseq.narg] *= 10;
  750. escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
  751. }
  752. if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
  753. escseq.narg++, p++;
  754. else {
  755. escseq.mode = *p;
  756. escseq.narg++;
  757. return;
  758. }
  759. }
  760. }
  761. void
  762. tmoveto(int x, int y) {
  763. LIMIT(x, 0, term.col-1);
  764. LIMIT(y, 0, term.row-1);
  765. term.c.state &= ~CURSOR_WRAPNEXT;
  766. term.c.x = x;
  767. term.c.y = y;
  768. }
  769. void
  770. tsetchar(char *c) {
  771. term.line[term.c.y][term.c.x] = term.c.attr;
  772. memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
  773. term.line[term.c.y][term.c.x].state |= GLYPH_SET;
  774. }
  775. void
  776. tclearregion(int x1, int y1, int x2, int y2) {
  777. int x, y, temp;
  778. if(x1 > x2)
  779. temp = x1, x1 = x2, x2 = temp;
  780. if(y1 > y2)
  781. temp = y1, y1 = y2, y2 = temp;
  782. LIMIT(x1, 0, term.col-1);
  783. LIMIT(x2, 0, term.col-1);
  784. LIMIT(y1, 0, term.row-1);
  785. LIMIT(y2, 0, term.row-1);
  786. for(y = y1; y <= y2; y++)
  787. for(x = x1; x <= x2; x++)
  788. term.line[y][x].state = 0;
  789. }
  790. void
  791. tdeletechar(int n) {
  792. int src = term.c.x + n;
  793. int dst = term.c.x;
  794. int size = term.col - src;
  795. if(src >= term.col) {
  796. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  797. return;
  798. }
  799. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
  800. tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
  801. }
  802. void
  803. tinsertblank(int n) {
  804. int src = term.c.x;
  805. int dst = src + n;
  806. int size = term.col - dst;
  807. if(dst >= term.col) {
  808. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  809. return;
  810. }
  811. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
  812. tclearregion(src, term.c.y, dst - 1, term.c.y);
  813. }
  814. void
  815. tinsertblankline(int n) {
  816. if(term.c.y < term.top || term.c.y > term.bot)
  817. return;
  818. tscrolldown(term.c.y, n);
  819. }
  820. void
  821. tdeleteline(int n) {
  822. if(term.c.y < term.top || term.c.y > term.bot)
  823. return;
  824. tscrollup(term.c.y, n);
  825. }
  826. void
  827. tsetattr(int *attr, int l) {
  828. int i;
  829. for(i = 0; i < l; i++) {
  830. switch(attr[i]) {
  831. case 0:
  832. term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
  833. term.c.attr.fg = DefaultFG;
  834. term.c.attr.bg = DefaultBG;
  835. break;
  836. case 1:
  837. term.c.attr.mode |= ATTR_BOLD;
  838. break;
  839. case 4:
  840. term.c.attr.mode |= ATTR_UNDERLINE;
  841. break;
  842. case 7:
  843. term.c.attr.mode |= ATTR_REVERSE;
  844. break;
  845. case 22:
  846. term.c.attr.mode &= ~ATTR_BOLD;
  847. break;
  848. case 24:
  849. term.c.attr.mode &= ~ATTR_UNDERLINE;
  850. break;
  851. case 27:
  852. term.c.attr.mode &= ~ATTR_REVERSE;
  853. break;
  854. case 38:
  855. if(i + 2 < l && attr[i + 1] == 5) {
  856. i += 2;
  857. if(BETWEEN(attr[i], 0, 255))
  858. term.c.attr.fg = attr[i];
  859. else
  860. fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
  861. }
  862. else
  863. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
  864. break;
  865. case 39:
  866. term.c.attr.fg = DefaultFG;
  867. break;
  868. case 48:
  869. if(i + 2 < l && attr[i + 1] == 5) {
  870. i += 2;
  871. if(BETWEEN(attr[i], 0, 255))
  872. term.c.attr.bg = attr[i];
  873. else
  874. fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
  875. }
  876. else
  877. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
  878. break;
  879. case 49:
  880. term.c.attr.bg = DefaultBG;
  881. break;
  882. default:
  883. if(BETWEEN(attr[i], 30, 37))
  884. term.c.attr.fg = attr[i] - 30;
  885. else if(BETWEEN(attr[i], 40, 47))
  886. term.c.attr.bg = attr[i] - 40;
  887. else if(BETWEEN(attr[i], 90, 97))
  888. term.c.attr.fg = attr[i] - 90 + 8;
  889. else if(BETWEEN(attr[i], 100, 107))
  890. term.c.attr.fg = attr[i] - 100 + 8;
  891. else
  892. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
  893. break;
  894. }
  895. }
  896. }
  897. void
  898. tsetscroll(int t, int b) {
  899. int temp;
  900. LIMIT(t, 0, term.row-1);
  901. LIMIT(b, 0, term.row-1);
  902. if(t > b) {
  903. temp = t;
  904. t = b;
  905. b = temp;
  906. }
  907. term.top = t;
  908. term.bot = b;
  909. }
  910. void
  911. csihandle(void) {
  912. switch(escseq.mode) {
  913. default:
  914. unknown:
  915. fprintf(stderr, "erresc: unknown csi ");
  916. csidump();
  917. /* die(""); */
  918. break;
  919. case '@': /* ICH -- Insert <n> blank char */
  920. DEFAULT(escseq.arg[0], 1);
  921. tinsertblank(escseq.arg[0]);
  922. break;
  923. case 'A': /* CUU -- Cursor <n> Up */
  924. case 'e':
  925. DEFAULT(escseq.arg[0], 1);
  926. tmoveto(term.c.x, term.c.y-escseq.arg[0]);
  927. break;
  928. case 'B': /* CUD -- Cursor <n> Down */
  929. DEFAULT(escseq.arg[0], 1);
  930. tmoveto(term.c.x, term.c.y+escseq.arg[0]);
  931. break;
  932. case 'C': /* CUF -- Cursor <n> Forward */
  933. case 'a':
  934. DEFAULT(escseq.arg[0], 1);
  935. tmoveto(term.c.x+escseq.arg[0], term.c.y);
  936. break;
  937. case 'D': /* CUB -- Cursor <n> Backward */
  938. DEFAULT(escseq.arg[0], 1);
  939. tmoveto(term.c.x-escseq.arg[0], term.c.y);
  940. break;
  941. case 'E': /* CNL -- Cursor <n> Down and first col */
  942. DEFAULT(escseq.arg[0], 1);
  943. tmoveto(0, term.c.y+escseq.arg[0]);
  944. break;
  945. case 'F': /* CPL -- Cursor <n> Up and first col */
  946. DEFAULT(escseq.arg[0], 1);
  947. tmoveto(0, term.c.y-escseq.arg[0]);
  948. break;
  949. case 'G': /* CHA -- Move to <col> */
  950. case '`': /* XXX: HPA -- same? */
  951. DEFAULT(escseq.arg[0], 1);
  952. tmoveto(escseq.arg[0]-1, term.c.y);
  953. break;
  954. case 'H': /* CUP -- Move to <row> <col> */
  955. case 'f': /* XXX: HVP -- same? */
  956. DEFAULT(escseq.arg[0], 1);
  957. DEFAULT(escseq.arg[1], 1);
  958. tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
  959. break;
  960. /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
  961. case 'J': /* ED -- Clear screen */
  962. switch(escseq.arg[0]) {
  963. case 0: /* below */
  964. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  965. if(term.c.y < term.row-1)
  966. tclearregion(0, term.c.y+1, term.col-1, term.row-1);
  967. break;
  968. case 1: /* above */
  969. if(term.c.y > 1)
  970. tclearregion(0, 0, term.col-1, term.c.y-1);
  971. tclearregion(0, term.c.y, term.c.x, term.c.y);
  972. break;
  973. case 2: /* all */
  974. tclearregion(0, 0, term.col-1, term.row-1);
  975. break;
  976. default:
  977. goto unknown;
  978. }
  979. break;
  980. case 'K': /* EL -- Clear line */
  981. switch(escseq.arg[0]) {
  982. case 0: /* right */
  983. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  984. break;
  985. case 1: /* left */
  986. tclearregion(0, term.c.y, term.c.x, term.c.y);
  987. break;
  988. case 2: /* all */
  989. tclearregion(0, term.c.y, term.col-1, term.c.y);
  990. break;
  991. }
  992. break;
  993. case 'S': /* SU -- Scroll <n> line up */
  994. DEFAULT(escseq.arg[0], 1);
  995. tscrollup(term.top, escseq.arg[0]);
  996. break;
  997. case 'T': /* SD -- Scroll <n> line down */
  998. DEFAULT(escseq.arg[0], 1);
  999. tscrolldown(term.top, escseq.arg[0]);
  1000. break;
  1001. case 'L': /* IL -- Insert <n> blank lines */
  1002. DEFAULT(escseq.arg[0], 1);
  1003. tinsertblankline(escseq.arg[0]);
  1004. break;
  1005. case 'l': /* RM -- Reset Mode */
  1006. if(escseq.priv) {
  1007. switch(escseq.arg[0]) {
  1008. case 1:
  1009. term.mode &= ~MODE_APPKEYPAD;
  1010. break;
  1011. case 5: /* DECSCNM -- Remove reverse video */
  1012. if(IS_SET(MODE_REVERSE)) {
  1013. term.mode &= ~MODE_REVERSE;
  1014. draw();
  1015. }
  1016. break;
  1017. case 7:
  1018. term.mode &= ~MODE_WRAP;
  1019. break;
  1020. case 12: /* att610 -- Stop blinking cursor (IGNORED) */
  1021. break;
  1022. case 20:
  1023. term.mode &= ~MODE_CRLF;
  1024. break;
  1025. case 25:
  1026. term.c.state |= CURSOR_HIDE;
  1027. break;
  1028. case 1000: /* disable X11 xterm mouse reporting */
  1029. term.mode &= ~MODE_MOUSEBTN;
  1030. break;
  1031. case 1002:
  1032. term.mode &= ~MODE_MOUSEMOTION;
  1033. break;
  1034. case 1049: /* = 1047 and 1048 */
  1035. case 47:
  1036. case 1047:
  1037. if(IS_SET(MODE_ALTSCREEN)) {
  1038. tclearregion(0, 0, term.col-1, term.row-1);
  1039. tswapscreen();
  1040. }
  1041. if(escseq.arg[0] != 1049)
  1042. break;
  1043. case 1048:
  1044. tcursor(CURSOR_LOAD);
  1045. break;
  1046. default:
  1047. goto unknown;
  1048. }
  1049. } else {
  1050. switch(escseq.arg[0]) {
  1051. case 4:
  1052. term.mode &= ~MODE_INSERT;
  1053. break;
  1054. default:
  1055. goto unknown;
  1056. }
  1057. }
  1058. break;
  1059. case 'M': /* DL -- Delete <n> lines */
  1060. DEFAULT(escseq.arg[0], 1);
  1061. tdeleteline(escseq.arg[0]);
  1062. break;
  1063. case 'X': /* ECH -- Erase <n> char */
  1064. DEFAULT(escseq.arg[0], 1);
  1065. tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
  1066. break;
  1067. case 'P': /* DCH -- Delete <n> char */
  1068. DEFAULT(escseq.arg[0], 1);
  1069. tdeletechar(escseq.arg[0]);
  1070. break;
  1071. /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
  1072. case 'd': /* VPA -- Move to <row> */
  1073. DEFAULT(escseq.arg[0], 1);
  1074. tmoveto(term.c.x, escseq.arg[0]-1);
  1075. break;
  1076. case 'h': /* SM -- Set terminal mode */
  1077. if(escseq.priv) {
  1078. switch(escseq.arg[0]) {
  1079. case 1:
  1080. term.mode |= MODE_APPKEYPAD;
  1081. break;
  1082. case 5: /* DECSCNM -- Reverve video */
  1083. if(!IS_SET(MODE_REVERSE)) {
  1084. term.mode |= MODE_REVERSE;
  1085. draw();
  1086. }
  1087. break;
  1088. case 7:
  1089. term.mode |= MODE_WRAP;
  1090. break;
  1091. case 20:
  1092. term.mode |= MODE_CRLF;
  1093. break;
  1094. case 12: /* att610 -- Start blinking cursor (IGNORED) */
  1095. /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
  1096. if(escseq.narg > 1 && escseq.arg[1] != 25)
  1097. break;
  1098. case 25:
  1099. term.c.state &= ~CURSOR_HIDE;
  1100. break;
  1101. case 1000: /* 1000,1002: enable xterm mouse report */
  1102. term.mode |= MODE_MOUSEBTN;
  1103. break;
  1104. case 1002:
  1105. term.mode |= MODE_MOUSEMOTION;
  1106. break;
  1107. case 1049: /* = 1047 and 1048 */
  1108. case 47:
  1109. case 1047:
  1110. if(IS_SET(MODE_ALTSCREEN))
  1111. tclearregion(0, 0, term.col-1, term.row-1);
  1112. else
  1113. tswapscreen();
  1114. if(escseq.arg[0] != 1049)
  1115. break;
  1116. case 1048:
  1117. tcursor(CURSOR_SAVE);
  1118. break;
  1119. default: goto unknown;
  1120. }
  1121. } else {
  1122. switch(escseq.arg[0]) {
  1123. case 4:
  1124. term.mode |= MODE_INSERT;
  1125. break;
  1126. default: goto unknown;
  1127. }
  1128. };
  1129. break;
  1130. case 'm': /* SGR -- Terminal attribute (color) */
  1131. tsetattr(escseq.arg, escseq.narg);
  1132. break;
  1133. case 'r': /* DECSTBM -- Set Scrolling Region */
  1134. if(escseq.priv)
  1135. goto unknown;
  1136. else {
  1137. DEFAULT(escseq.arg[0], 1);
  1138. DEFAULT(escseq.arg[1], term.row);
  1139. tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
  1140. tmoveto(0, 0);
  1141. }
  1142. break;
  1143. case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
  1144. tcursor(CURSOR_SAVE);
  1145. break;
  1146. case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
  1147. tcursor(CURSOR_LOAD);
  1148. break;
  1149. }
  1150. }
  1151. void
  1152. csidump(void) {
  1153. int i;
  1154. printf("ESC [ %s", escseq.priv ? "? " : "");
  1155. if(escseq.narg)
  1156. for(i = 0; i < escseq.narg; i++)
  1157. printf("%d ", escseq.arg[i]);
  1158. if(escseq.mode)
  1159. putchar(escseq.mode);
  1160. putchar('\n');
  1161. }
  1162. void
  1163. csireset(void) {
  1164. memset(&escseq, 0, sizeof(escseq));
  1165. }
  1166. void
  1167. tputtab(void) {
  1168. int space = TAB - term.c.x % TAB;
  1169. tmoveto(term.c.x + space, term.c.y);
  1170. }
  1171. void
  1172. tputc(char *c) {
  1173. char ascii = *c;
  1174. if(term.esc & ESC_START) {
  1175. if(term.esc & ESC_CSI) {
  1176. escseq.buf[escseq.len++] = ascii;
  1177. if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
  1178. term.esc = 0;
  1179. csiparse(), csihandle();
  1180. }
  1181. /* TODO: handle other OSC */
  1182. } else if(term.esc & ESC_OSC) {
  1183. if(ascii == ';') {
  1184. term.titlelen = 0;
  1185. term.esc = ESC_START | ESC_TITLE;
  1186. }
  1187. } else if(term.esc & ESC_TITLE) {
  1188. if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
  1189. term.esc = 0;
  1190. term.title[term.titlelen] = '\0';
  1191. XStoreName(xw.dpy, xw.win, term.title);
  1192. } else {
  1193. term.title[term.titlelen++] = ascii;
  1194. }
  1195. } else if(term.esc & ESC_ALTCHARSET) {
  1196. switch(ascii) {
  1197. case '0': /* Line drawing crap */
  1198. term.c.attr.mode |= ATTR_GFX;
  1199. break;
  1200. case 'B': /* Back to regular text */
  1201. term.c.attr.mode &= ~ATTR_GFX;
  1202. break;
  1203. default:
  1204. fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
  1205. }
  1206. term.esc = 0;
  1207. } else {
  1208. switch(ascii) {
  1209. case '[':
  1210. term.esc |= ESC_CSI;
  1211. break;
  1212. case ']':
  1213. term.esc |= ESC_OSC;
  1214. break;
  1215. case '(':
  1216. term.esc |= ESC_ALTCHARSET;
  1217. break;
  1218. case 'D': /* IND -- Linefeed */
  1219. if(term.c.y == term.bot)
  1220. tscrollup(term.top, 1);
  1221. else
  1222. tmoveto(term.c.x, term.c.y+1);
  1223. term.esc = 0;
  1224. break;
  1225. case 'E': /* NEL -- Next line */
  1226. tnewline(1); /* always go to first col */
  1227. term.esc = 0;
  1228. break;
  1229. case 'M': /* RI -- Reverse index */
  1230. if(term.c.y == term.top)
  1231. tscrolldown(term.top, 1);
  1232. else
  1233. tmoveto(term.c.x, term.c.y-1);
  1234. term.esc = 0;
  1235. break;
  1236. case 'c': /* RIS -- Reset to inital state */
  1237. treset();
  1238. term.esc = 0;
  1239. break;
  1240. case '=': /* DECPAM -- Application keypad */
  1241. term.mode |= MODE_APPKEYPAD;
  1242. term.esc = 0;
  1243. break;
  1244. case '>': /* DECPNM -- Normal keypad */
  1245. term.mode &= ~MODE_APPKEYPAD;
  1246. term.esc = 0;
  1247. break;
  1248. case '7': /* DECSC -- Save Cursor */
  1249. tcursor(CURSOR_SAVE);
  1250. term.esc = 0;
  1251. break;
  1252. case '8': /* DECRC -- Restore Cursor */
  1253. tcursor(CURSOR_LOAD);
  1254. term.esc = 0;
  1255. break;
  1256. default:
  1257. fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
  1258. (unsigned char) ascii, isprint(ascii)?ascii:'.');
  1259. term.esc = 0;
  1260. }
  1261. }
  1262. } else {
  1263. switch(ascii) {
  1264. case '\t':
  1265. tputtab();
  1266. break;
  1267. case '\b':
  1268. tmoveto(term.c.x-1, term.c.y);
  1269. break;
  1270. case '\r':
  1271. tmoveto(0, term.c.y);
  1272. break;
  1273. case '\f':
  1274. case '\v':
  1275. case '\n':
  1276. /* go to first col if the mode is set */
  1277. tnewline(IS_SET(MODE_CRLF));
  1278. break;
  1279. case '\a':
  1280. if(!(xw.state & WIN_FOCUSED))
  1281. xseturgency(1);
  1282. break;
  1283. case '\033':
  1284. csireset();
  1285. term.esc = ESC_START;
  1286. break;
  1287. default:
  1288. if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
  1289. tnewline(1); /* always go to first col */
  1290. tsetchar(c);
  1291. if(term.c.x+1 < term.col)
  1292. tmoveto(term.c.x+1, term.c.y);
  1293. else
  1294. term.c.state |= CURSOR_WRAPNEXT;
  1295. }
  1296. }
  1297. }
  1298. int
  1299. tresize(int col, int row) {
  1300. int i, x;
  1301. int minrow = MIN(row, term.row);
  1302. int mincol = MIN(col, term.col);
  1303. int slide = term.c.y - row + 1;
  1304. if(col < 1 || row < 1)
  1305. return 0;
  1306. /* free unneeded rows */
  1307. i = 0;
  1308. if(slide > 0) {
  1309. /* slide screen to keep cursor where we expect it -
  1310. * tscrollup would work here, but we can optimize to
  1311. * memmove because we're freeing the earlier lines */
  1312. for(/* i = 0 */; i < slide; i++) {
  1313. free(term.line[i]);
  1314. free(term.alt[i]);
  1315. }
  1316. memmove(term.line, term.line + slide, row * sizeof(Line));
  1317. memmove(term.alt, term.alt + slide, row * sizeof(Line));
  1318. }
  1319. for(i += row; i < term.row; i++) {
  1320. free(term.line[i]);
  1321. free(term.alt[i]);
  1322. }
  1323. /* resize to new height */
  1324. term.line = realloc(term.line, row * sizeof(Line));
  1325. term.alt = realloc(term.alt, row * sizeof(Line));
  1326. /* resize each row to new width, zero-pad if needed */
  1327. for(i = 0; i < minrow; i++) {
  1328. term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
  1329. term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
  1330. for(x = mincol; x < col; x++) {
  1331. term.line[i][x].state = 0;
  1332. term.alt[i][x].state = 0;
  1333. }
  1334. }
  1335. /* allocate any new rows */
  1336. for(/* i == minrow */; i < row; i++) {
  1337. term.line[i] = calloc(col, sizeof(Glyph));
  1338. term.alt [i] = calloc(col, sizeof(Glyph));
  1339. }
  1340. /* update terminal size */
  1341. term.col = col, term.row = row;
  1342. /* make use of the LIMIT in tmoveto */
  1343. tmoveto(term.c.x, term.c.y);
  1344. /* reset scrolling region */
  1345. tsetscroll(0, row-1);
  1346. return (slide > 0);
  1347. }
  1348. void
  1349. xresize(int col, int row) {
  1350. Pixmap newbuf;
  1351. int oldw, oldh;
  1352. oldw = xw.bufw;
  1353. oldh = xw.bufh;
  1354. xw.bufw = MAX(1, col * xw.cw);
  1355. xw.bufh = MAX(1, row * xw.ch);
  1356. newbuf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
  1357. XCopyArea(xw.dpy, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
  1358. XFreePixmap(xw.dpy, xw.buf);
  1359. XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
  1360. if(xw.bufw > oldw)
  1361. XFillRectangle(xw.dpy, newbuf, dc.gc, oldw, 0,
  1362. xw.bufw-oldw, MIN(xw.bufh, oldh));
  1363. else if(xw.bufw < oldw && (BORDER > 0 || xw.w > xw.bufw))
  1364. XClearArea(xw.dpy, xw.win, BORDER+xw.bufw, BORDER,
  1365. xw.w-xw.bufh-BORDER, BORDER+MIN(xw.bufh, oldh),
  1366. False);
  1367. if(xw.bufh > oldh)
  1368. XFillRectangle(xw.dpy, newbuf, dc.gc, 0, oldh,
  1369. xw.bufw, xw.bufh-oldh);
  1370. else if(xw.bufh < oldh && (BORDER > 0 || xw.h > xw.bufh))
  1371. XClearArea(xw.dpy, xw.win, BORDER, BORDER+xw.bufh,
  1372. xw.w-2*BORDER, xw.h-xw.bufh-BORDER,
  1373. False);
  1374. xw.buf = newbuf;
  1375. }
  1376. void
  1377. xloadcols(void) {
  1378. int i, r, g, b;
  1379. XColor color;
  1380. unsigned long white = WhitePixel(xw.dpy, xw.scr);
  1381. for(i = 0; i < 16; i++) {
  1382. if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
  1383. dc.col[i] = white;
  1384. fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
  1385. } else
  1386. dc.col[i] = color.pixel;
  1387. }
  1388. /* same colors as xterm */
  1389. for(r = 0; r < 6; r++)
  1390. for(g = 0; g < 6; g++)
  1391. for(b = 0; b < 6; b++) {
  1392. color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
  1393. color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
  1394. color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
  1395. if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
  1396. dc.col[i] = white;
  1397. fprintf(stderr, "Could not allocate color %d\n", i);
  1398. } else
  1399. dc.col[i] = color.pixel;
  1400. i++;
  1401. }
  1402. for(r = 0; r < 24; r++, i++) {
  1403. color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
  1404. if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
  1405. dc.col[i] = white;
  1406. fprintf(stderr, "Could not allocate color %d\n", i);
  1407. } else
  1408. dc.col[i] = color.pixel;
  1409. }
  1410. }
  1411. void
  1412. xclear(int x1, int y1, int x2, int y2) {
  1413. XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
  1414. XFillRectangle(xw.dpy, xw.buf, dc.gc,
  1415. x1 * xw.cw, y1 * xw.ch,
  1416. (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
  1417. }
  1418. void
  1419. xhints(void) {
  1420. XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
  1421. XWMHints wm = {.flags = InputHint, .input = 1};
  1422. XSizeHints size = {
  1423. .flags = PSize | PResizeInc | PBaseSize,
  1424. .height = xw.h,
  1425. .width = xw.w,
  1426. .height_inc = xw.ch,
  1427. .width_inc = xw.cw,
  1428. .base_height = 2*BORDER,
  1429. .base_width = 2*BORDER,
  1430. };
  1431. XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
  1432. }
  1433. XFontSet
  1434. xinitfont(char *fontstr) {
  1435. XFontSet set;
  1436. char *def, **missing;
  1437. int n;
  1438. missing = NULL;
  1439. set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
  1440. if(missing) {
  1441. while(n--)
  1442. fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
  1443. XFreeStringList(missing);
  1444. }
  1445. return set;
  1446. }
  1447. void
  1448. xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
  1449. XFontStruct **xfonts;
  1450. char **font_names;
  1451. int i, n;
  1452. *ascent = *descent = *lbearing = *rbearing = 0;
  1453. n = XFontsOfFontSet(set, &xfonts, &font_names);
  1454. for(i = 0; i < n; i++) {
  1455. *ascent = MAX(*ascent, (*xfonts)->ascent);
  1456. *descent = MAX(*descent, (*xfonts)->descent);
  1457. *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
  1458. *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
  1459. xfonts++;
  1460. }
  1461. }
  1462. void
  1463. initfonts(char *fontstr, char *bfontstr) {
  1464. if((dc.font.set = xinitfont(fontstr)) == NULL ||
  1465. (dc.bfont.set = xinitfont(bfontstr)) == NULL)
  1466. die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
  1467. xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
  1468. &dc.font.lbearing, &dc.font.rbearing);
  1469. xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
  1470. &dc.bfont.lbearing, &dc.bfont.rbearing);
  1471. }
  1472. void
  1473. xinit(void) {
  1474. XSetWindowAttributes attrs;
  1475. Cursor cursor;
  1476. Window parent;
  1477. if(!(xw.dpy = XOpenDisplay(NULL)))
  1478. die("Can't open display\n");
  1479. xw.scr = XDefaultScreen(xw.dpy);
  1480. /* font */
  1481. initfonts(FONT, BOLDFONT);
  1482. /* XXX: Assuming same size for bold font */
  1483. xw.cw = dc.font.rbearing - dc.font.lbearing;
  1484. xw.ch = dc.font.ascent + dc.font.descent;
  1485. /* colors */
  1486. xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
  1487. xloadcols();
  1488. /* window - default size */
  1489. xw.bufh = term.row * xw.ch;
  1490. xw.bufw = term.col * xw.cw;
  1491. xw.h = xw.bufh + 2*BORDER;
  1492. xw.w = xw.bufw + 2*BORDER;
  1493. attrs.background_pixel = dc.col[DefaultBG];
  1494. attrs.border_pixel = dc.col[DefaultBG];
  1495. attrs.bit_gravity = NorthWestGravity;
  1496. attrs.event_mask = FocusChangeMask | KeyPressMask
  1497. | ExposureMask | VisibilityChangeMask | StructureNotifyMask
  1498. | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
  1499. | EnterWindowMask | LeaveWindowMask;
  1500. attrs.colormap = xw.cmap;
  1501. parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
  1502. xw.win = XCreateWindow(xw.dpy, parent, 0, 0,
  1503. xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
  1504. XDefaultVisual(xw.dpy, xw.scr),
  1505. CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
  1506. | CWColormap,
  1507. &attrs);
  1508. xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
  1509. /* input methods */
  1510. xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
  1511. xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
  1512. | XIMStatusNothing, XNClientWindow, xw.win,
  1513. XNFocusWindow, xw.win, NULL);
  1514. /* gc */
  1515. dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
  1516. /* white cursor, black outline */
  1517. cursor = XCreateFontCursor(xw.dpy, XC_xterm);
  1518. XDefineCursor(xw.dpy, xw.win, cursor);
  1519. XRecolorCursor(xw.dpy, cursor,
  1520. &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
  1521. &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
  1522. xembedatom = XInternAtom(xw.dpy, "_XEMBED", False);
  1523. XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
  1524. XMapWindow(xw.dpy, xw.win);
  1525. xhints();
  1526. XSync(xw.dpy, 0);
  1527. }
  1528. void
  1529. xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
  1530. unsigned long xfg = dc.col[base.fg], xbg = dc.col[base.bg], temp;
  1531. int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
  1532. int i;
  1533. /* only switch default fg/bg if term is in RV mode */
  1534. if(IS_SET(MODE_REVERSE)) {
  1535. if(base.fg == DefaultFG)
  1536. xfg = dc.col[DefaultBG];
  1537. if(base.bg == DefaultBG)
  1538. xbg = dc.col[DefaultFG];
  1539. }
  1540. if(base.mode & ATTR_REVERSE)
  1541. temp = xfg, xfg = xbg, xbg = temp;
  1542. XSetBackground(xw.dpy, dc.gc, xbg);
  1543. XSetForeground(xw.dpy, dc.gc, xfg);
  1544. if(base.mode & ATTR_GFX) {
  1545. for(i = 0; i < bytelen; i++) {
  1546. char c = gfx[(unsigned int)s[i] % 256];
  1547. if(c)
  1548. s[i] = c;
  1549. else if(s[i] > 0x5f)
  1550. s[i] -= 0x5f;
  1551. }
  1552. }
  1553. XmbDrawImageString(xw.dpy, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.set : dc.font.set,
  1554. dc.gc, winx, winy, s, bytelen);
  1555. if(base.mode & ATTR_UNDERLINE)
  1556. XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
  1557. }
  1558. void
  1559. xdrawcursor(void) {
  1560. static int oldx = 0;
  1561. static int oldy = 0;
  1562. int sl;
  1563. Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
  1564. LIMIT(oldx, 0, term.col-1);
  1565. LIMIT(oldy, 0, term.row-1);
  1566. if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
  1567. memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
  1568. /* remove the old cursor */
  1569. if(term.line[oldy][oldx].state & GLYPH_SET) {
  1570. sl = utf8size(term.line[oldy][oldx].c);
  1571. xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
  1572. } else
  1573. xclear(oldx, oldy, oldx, oldy);
  1574. /* draw the new one */
  1575. if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
  1576. sl = utf8size(g.c);
  1577. if(IS_SET(MODE_REVERSE))
  1578. g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
  1579. xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
  1580. oldx = term.c.x, oldy = term.c.y;
  1581. }
  1582. }
  1583. void
  1584. draw() {
  1585. drawregion(0, 0, term.col, term.row);
  1586. }
  1587. void
  1588. drawregion(int x1, int y1, int x2, int y2) {
  1589. int ic, ib, x, y, ox, sl;
  1590. Glyph base, new;
  1591. char buf[DRAW_BUF_SIZ];
  1592. if(!(xw.state & WIN_VISIBLE))
  1593. return;
  1594. xclear(x1, y1, x2-1, y2-1);
  1595. for(y = y1; y < y2; y++) {
  1596. base = term.line[y][0];
  1597. ic = ib = ox = 0;
  1598. for(x = x1; x < x2; x++) {
  1599. new = term.line[y][x];
  1600. if(sel.bx != -1 && *(new.c) && selected(x, y))
  1601. new.mode ^= ATTR_REVERSE;
  1602. if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
  1603. ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
  1604. xdraws(buf, base, ox, y, ic, ib);
  1605. ic = ib = 0;
  1606. }
  1607. if(new.state & GLYPH_SET) {
  1608. if(ib == 0) {
  1609. ox = x;
  1610. base = new;
  1611. }
  1612. sl = utf8size(new.c);
  1613. memcpy(buf+ib, new.c, sl);
  1614. ib += sl;
  1615. ++ic;
  1616. }
  1617. }
  1618. if(ib > 0)
  1619. xdraws(buf, base, ox, y, ic, ib);
  1620. }
  1621. xdrawcursor();
  1622. XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
  1623. }
  1624. void
  1625. expose(XEvent *ev) {
  1626. XExposeEvent *e = &ev->xexpose;
  1627. if(xw.state & WIN_REDRAW) {
  1628. if(!e->count) {
  1629. xw.state &= ~WIN_REDRAW;
  1630. draw();
  1631. }
  1632. } else
  1633. XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
  1634. e->width, e->height, e->x, e->y);
  1635. }
  1636. void
  1637. visibility(XEvent *ev) {
  1638. XVisibilityEvent *e = &ev->xvisibility;
  1639. if(e->state == VisibilityFullyObscured)
  1640. xw.state &= ~WIN_VISIBLE;
  1641. else if(!(xw.state & WIN_VISIBLE))
  1642. /* need a full redraw for next Expose, not just a buf copy */
  1643. xw.state |= WIN_VISIBLE | WIN_REDRAW;
  1644. }
  1645. void
  1646. unmap(XEvent *ev) {
  1647. xw.state &= ~WIN_VISIBLE;
  1648. }
  1649. void
  1650. xseturgency(int add) {
  1651. XWMHints *h = XGetWMHints(xw.dpy, xw.win);
  1652. h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
  1653. XSetWMHints(xw.dpy, xw.win, h);
  1654. XFree(h);
  1655. }
  1656. void
  1657. focus(XEvent *ev) {
  1658. if(ev->type == FocusIn) {
  1659. xw.state |= WIN_FOCUSED;
  1660. xseturgency(0);
  1661. } else
  1662. xw.state &= ~WIN_FOCUSED;
  1663. draw();
  1664. }
  1665. char*
  1666. kmap(KeySym k, unsigned int state) {
  1667. int i;
  1668. for(i = 0; i < LEN(key); i++)
  1669. if(key[i].k == k && (key[i].mask == 0 || key[i].mask & state))
  1670. return (char*)key[i].s;
  1671. return NULL;
  1672. }
  1673. void
  1674. kpress(XEvent *ev) {
  1675. XKeyEvent *e = &ev->xkey;
  1676. KeySym ksym;
  1677. char buf[32];
  1678. char *customkey;
  1679. int len;
  1680. int meta;
  1681. int shift;
  1682. Status status;
  1683. meta = e->state & Mod1Mask;
  1684. shift = e->state & ShiftMask;
  1685. len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
  1686. /* 1. custom keys from config.h */
  1687. if((customkey = kmap(ksym, e->state)))
  1688. ttywrite(customkey, strlen(customkey));
  1689. /* 2. hardcoded (overrides X lookup) */
  1690. else
  1691. switch(ksym) {
  1692. case XK_Up:
  1693. case XK_Down:
  1694. case XK_Left:
  1695. case XK_Right:
  1696. /* XXX: shift up/down doesn't work */
  1697. sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
  1698. ttywrite(buf, 3);
  1699. break;
  1700. case XK_Insert:
  1701. if(shift)
  1702. selpaste();
  1703. break;
  1704. case XK_Return:
  1705. if(IS_SET(MODE_CRLF))
  1706. ttywrite("\r\n", 2);
  1707. else
  1708. ttywrite("\r", 1);
  1709. break;
  1710. /* 3. X lookup */
  1711. default:
  1712. if(len > 0) {
  1713. if(meta && len == 1)
  1714. ttywrite("\033", 1);
  1715. ttywrite(buf, len);
  1716. }
  1717. break;
  1718. }
  1719. }
  1720. void
  1721. cmessage(XEvent *e) {
  1722. if (e->xclient.message_type == xembedatom && e->xclient.format == 32) {
  1723. if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
  1724. xw.state |= WIN_FOCUSED;
  1725. xseturgency(0);
  1726. } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
  1727. xw.state &= ~WIN_FOCUSED;
  1728. }
  1729. draw();
  1730. }
  1731. }
  1732. void
  1733. resize(XEvent *e) {
  1734. int col, row;
  1735. if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
  1736. return;
  1737. xw.w = e->xconfigure.width;
  1738. xw.h = e->xconfigure.height;
  1739. col = (xw.w - 2*BORDER) / xw.cw;
  1740. row = (xw.h - 2*BORDER) / xw.ch;
  1741. if(col == term.col && row == term.row)
  1742. return;
  1743. if(tresize(col, row))
  1744. draw();
  1745. ttyresize(col, row);
  1746. xresize(col, row);
  1747. }
  1748. void
  1749. run(void) {
  1750. XEvent ev;
  1751. fd_set rfd;
  1752. int xfd = XConnectionNumber(xw.dpy);
  1753. for(;;) {
  1754. FD_ZERO(&rfd);
  1755. FD_SET(cmdfd, &rfd);
  1756. FD_SET(xfd, &rfd);
  1757. if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
  1758. if(errno == EINTR)
  1759. continue;
  1760. die("select failed: %s\n", SERRNO);
  1761. }
  1762. if(FD_ISSET(cmdfd, &rfd)) {
  1763. ttyread();
  1764. draw();
  1765. }
  1766. while(XPending(xw.dpy)) {
  1767. XNextEvent(xw.dpy, &ev);
  1768. if(XFilterEvent(&ev, xw.win))
  1769. continue;
  1770. if(handler[ev.type])
  1771. (handler[ev.type])(&ev);
  1772. }
  1773. }
  1774. }
  1775. int
  1776. main(int argc, char *argv[]) {
  1777. int i;
  1778. for(i = 1; i < argc; i++) {
  1779. switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
  1780. case 't':
  1781. if(++i < argc) opt_title = argv[i];
  1782. break;
  1783. case 'c':
  1784. if(++i < argc) opt_class = argv[i];
  1785. break;
  1786. case 'w':
  1787. if(++i < argc) opt_embed = argv[i];
  1788. break;
  1789. case 'e':
  1790. /* eat every remaining arguments */
  1791. if(++i < argc) opt_cmd = &argv[i];
  1792. goto run;
  1793. case 'v':
  1794. default:
  1795. die(USAGE);
  1796. }
  1797. }
  1798. run:
  1799. setlocale(LC_CTYPE, "");
  1800. tnew(80, 24);
  1801. ttynew();
  1802. xinit();
  1803. selinit();
  1804. run();
  1805. return 0;
  1806. }