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From df32a82e8a889629ed406ce468f24c35da7e9a03 Mon Sep 17 00:00:00 2001
From: Miles Alan <m@milesalan.com>
Date: Sun, 11 Aug 2019 21:33:55 -0500
Subject: [PATCH] Add handler for SIGUSR1 signal to run an externalpipe command
---
config.def.h | 1 +
st.c | 14 ++++++++++++++
st.h | 1 +
3 files changed, 16 insertions(+)
diff --git a/config.def.h b/config.def.h
index 0e01717..96d1bdd 100644
--- a/config.def.h
+++ b/config.def.h
@@ -1,3 +1,4 @@
+char *externalpipe_sigusr1[] = {"/bin/sh", "-c", "externalpipe_buffer.sh st_strings_read"};
/* See LICENSE file for copyright and license details. */
/*
diff --git a/st.c b/st.c
index b8e6077..48cae2e 100644
--- a/st.c
+++ b/st.c
@@ -155,6 +155,7 @@ typedef struct {
static void execsh(char *, char **);
static void stty(char **);
static void sigchld(int);
+static void sigusr1(int);
static void ttywriteraw(const char *, size_t);
static void csidump(void);
@@ -719,6 +720,13 @@ execsh(char *cmd, char **args)
_exit(1);
}
+void
+sigusr1(int unused)
+{
+ static Arg a = {.v = externalpipe_sigusr1};
+ externalpipe(&a);
+}
+
void
sigchld(int a)
{
@@ -765,6 +773,12 @@ stty(char **args)
int
ttynew(char *line, char *cmd, char *out, char **args)
{
+ static struct sigaction sa;
+ sa.sa_handler = sigusr1;
+ sigemptyset(&sa.sa_mask);
+ sa.sa_flags = SA_RESTART;
+ sigaction(SIGUSR1, &sa, NULL);
+
int m, s;
if (out) {
diff --git a/st.h b/st.h
index 38c61c4..794b4ff 100644
--- a/st.h
+++ b/st.h
@@ -111,6 +111,7 @@ void *xrealloc(void *, size_t);
char *xstrdup(char *);
/* config.h globals */
+extern char *externalpipe_sigusr1[];
extern char *utmp;
extern char *stty_args;
extern char *vtiden;
--
2.19.2
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