From 0befa1a5eb0adb4349d8036825ec0a4f6b36cba9 Mon Sep 17 00:00:00 2001
From: ray <gitea@rayelliott.dev>
Date: Tue, 25 Feb 2020 22:07:53 +0000
Subject: [PATCH] externalpipe patch applied - success

---
 st-externalpipe-0.8.2.diff | 76 ++++++++++++++++++++++++++++++++++++++
 st.c                       | 53 ++++++++++++++++++++++++++
 st.h                       |  1 +
 3 files changed, 130 insertions(+)
 create mode 100644 st-externalpipe-0.8.2.diff

diff --git a/st-externalpipe-0.8.2.diff b/st-externalpipe-0.8.2.diff
new file mode 100644
index 0000000..aeac389
--- /dev/null
+++ b/st-externalpipe-0.8.2.diff
@@ -0,0 +1,76 @@
+diff --git a/st.c b/st.c
+index ede7ae6..f55d30f 100644
+--- a/st.c
++++ b/st.c
+@@ -1914,6 +1914,59 @@ strparse(void)
+ 	}
+ }
+ 
++void
++externalpipe(const Arg *arg)
++{
++	int to[2];
++	char buf[UTF_SIZ];
++	void (*oldsigpipe)(int);
++	Glyph *bp, *end;
++	int lastpos, n, newline;
++
++	if (pipe(to) == -1)
++		return;
++
++	switch (fork()) {
++	case -1:
++		close(to[0]);
++		close(to[1]);
++		return;
++	case 0:
++		dup2(to[0], STDIN_FILENO);
++		close(to[0]);
++		close(to[1]);
++		execvp(((char **)arg->v)[0], (char **)arg->v);
++		fprintf(stderr, "st: execvp %s\n", ((char **)arg->v)[0]);
++		perror("failed");
++		exit(0);
++	}
++
++	close(to[0]);
++	/* ignore sigpipe for now, in case child exists early */
++	oldsigpipe = signal(SIGPIPE, SIG_IGN);
++	newline = 0;
++	for (n = 0; n < term.row; n++) {
++		bp = term.line[n];
++		lastpos = MIN(tlinelen(n) + 1, term.col) - 1;
++		if (lastpos < 0)
++			break;
++		end = &bp[lastpos + 1];
++		for (; bp < end; ++bp)
++			if (xwrite(to[1], buf, utf8encode(bp->u, buf)) < 0)
++				break;
++		if ((newline = term.line[n][lastpos].mode & ATTR_WRAP))
++			continue;
++		if (xwrite(to[1], "\n", 1) < 0)
++			break;
++		newline = 0;
++	}
++	if (newline)
++		(void)xwrite(to[1], "\n", 1);
++	close(to[1]);
++	/* restore */
++	signal(SIGPIPE, oldsigpipe);
++}
++
+ void
+ strdump(void)
+ {
+diff --git a/st.h b/st.h
+index 4da3051..cb7101f 100644
+--- a/st.h
++++ b/st.h
+@@ -80,6 +80,7 @@ void die(const char *, ...);
+ void redraw(void);
+ void draw(void);
+ 
++void externalpipe(const Arg *);
+ void printscreen(const Arg *);
+ void printsel(const Arg *);
+ void sendbreak(const Arg *);
diff --git a/st.c b/st.c
index 3e48410..ab291ac 100644
--- a/st.c
+++ b/st.c
@@ -1919,6 +1919,59 @@ strparse(void)
 	}
 }
 
+void
+externalpipe(const Arg *arg)
+{
+	int to[2];
+	char buf[UTF_SIZ];
+	void (*oldsigpipe)(int);
+	Glyph *bp, *end;
+	int lastpos, n, newline;
+
+	if (pipe(to) == -1)
+		return;
+
+	switch (fork()) {
+	case -1:
+		close(to[0]);
+		close(to[1]);
+		return;
+	case 0:
+		dup2(to[0], STDIN_FILENO);
+		close(to[0]);
+		close(to[1]);
+		execvp(((char **)arg->v)[0], (char **)arg->v);
+		fprintf(stderr, "st: execvp %s\n", ((char **)arg->v)[0]);
+		perror("failed");
+		exit(0);
+	}
+
+	close(to[0]);
+	/* ignore sigpipe for now, in case child exists early */
+	oldsigpipe = signal(SIGPIPE, SIG_IGN);
+	newline = 0;
+	for (n = 0; n < term.row; n++) {
+		bp = term.line[n];
+		lastpos = MIN(tlinelen(n) + 1, term.col) - 1;
+		if (lastpos < 0)
+			break;
+		end = &bp[lastpos + 1];
+		for (; bp < end; ++bp)
+			if (xwrite(to[1], buf, utf8encode(bp->u, buf)) < 0)
+				break;
+		if ((newline = term.line[n][lastpos].mode & ATTR_WRAP))
+			continue;
+		if (xwrite(to[1], "\n", 1) < 0)
+			break;
+		newline = 0;
+	}
+	if (newline)
+		(void)xwrite(to[1], "\n", 1);
+	close(to[1]);
+	/* restore */
+	signal(SIGPIPE, oldsigpipe);
+}
+
 void
 strdump(void)
 {
diff --git a/st.h b/st.h
index a1928ca..fe84fda 100644
--- a/st.h
+++ b/st.h
@@ -81,6 +81,7 @@ void die(const char *, ...);
 void redraw(void);
 void draw(void);
 
+void externalpipe(const Arg *);
 void printscreen(const Arg *);
 void printsel(const Arg *);
 void sendbreak(const Arg *);