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	st-externalpipe-20170608-b331da5.diff (2413B)
	---
	1 diff --git a/st.c b/st.c
	2 index 8d4a9f2..3b05f0b 100644
	3 --- a/st.c
	4 +++ b/st.c
	5 @@ -138,6 +138,7 @@ static void printscreen(const Arg *) ;
	6 static void iso14755(const Arg *);
	7 static void toggleprinter(const Arg *);
	8 static void sendbreak(const Arg *);
	9 +static void externalpipe(const Arg *);
	10
	11 /* config.h for applying patches and the configuration. */
	12 #include "config.h"
	13 @@ -2344,6 +2345,59 @@ eschandle(uchar ascii)
	14 }
	15
	16 void
	17 +externalpipe(const Arg *arg)
	18 +{
	19 + int to[2];
	20 + char buf[UTF_SIZ];
	21 + void (*oldsigpipe)(int);
	22 + Glyph bp, end;
	23 + int lastpos, n, newline;
	24 +
	25 + if (pipe(to) == -1)
	26 + return;
	27 +
	28 + switch (fork()) {
	29 + case -1:
	30 + close(to[0]);
	31 + close(to[1]);
	32 + return;
	33 + case 0:
	34 + dup2(to[0], STDIN_FILENO);
	35 + close(to[0]);
	36 + close(to[1]);
	37 + execvp(((char )arg->v)[0], (char )arg->v);
	38 + fprintf(stderr, "st: execvp %s ", ((char **)arg->v)[0]);
	39 + perror("failed");
	40 + exit(0);
	41 + }
	42 +
	43 + close(to[0]);
	44 + /* ignore sigpipe for now, in case child exits early */
	45 + oldsigpipe = signal(SIGPIPE, SIG_IGN);
	46 + newline = 0;
	47 + for (n = 0; n < term.row; n++) {
	48 + bp = term.line[n];
	49 + lastpos = MIN(tlinelen(n) + 1, term.col) - 1;
	50 + if (lastpos < 0)
	51 + break;
	52 + end = &bp[lastpos + 1];
	53 + for (; bp < end; ++bp)
	54 + if (xwrite(to[1], buf, utf8encode(bp->u, buf)) …
	55 + break;
	56 + if ((newline = term.line[n][lastpos].mode & ATTR_WRAP))
	57 + continue;
	58 + if (xwrite(to[1], "\n", 1) < 0)
	59 + break;
	60 + newline = 0;
	61 + }
	62 + if (newline)
	63 + (void)xwrite(to[1], "\n", 1);
	64 + close(to[1]);
	65 + /* restore */
	66 + signal(SIGPIPE, oldsigpipe);
	67 +}
	68 +
	69 +void
	70 tputc(Rune u)
	71 {
	72 char c[UTF_SIZ];
	73 diff --git a/win.h b/win.h
	74 index 428111c..a012a24 100644
	75 --- a/win.h
	76 +++ b/win.h
	77 @@ -28,3 +28,5 @@ void xresize(int, int);
	78 void xselpaste(void);
	79 unsigned long xwinid(void);
	80 void xsetsel(char *, Time);
	81 +
	82 +extern char winid[64];
	83 diff --git a/x.c b/x.c
	84 index fbfd350..ff052e6 100644
	85 --- a/x.c
	86 +++ b/x.c
	87 @@ -139,6 +139,7 @@ static void (handler[LASTEvent])(XEvent ) = {
	88 static DC dc;
	89 static XWindow xw;
	90 static XSelection xsel;
	91 +char winid[64];
	92
	93 /* Font Ring Cache */
	94 enum {
	95 @@ -915,6 +916,7 @@ xinit(void)
	96 win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr),…
	97 xw.vis, CWBackPixel \| CWBorderPixel \| CWBitGrav…
	98 \| CWEventMask \| CWColormap, &xw.attrs);
	99 + snprintf(winid, LEN(winid), "%lu", (unsigned long)xw.win);
	100
	101 memset(&gcvalues, 0, sizeof(gcvalues));
	102 gcvalues.graphics_exposures = False;