From 12e09f9f85ac48ff891adf92f3b2c9a5fea27273 Mon Sep 17 00:00:00 2001
From: Nicholas Noll <nbnoll@eml.cc>
Date: Sat, 4 Dec 2021 14:10:21 -0800
Subject: Chore(REMOVE): finished deprecation of old io functions.

The old methods were simple wrappers of C standard library functions.
We've moved (painfully) over to a new interface that allows for files to
live on the stack. All users of the functionality are ported over.
---
 src/cmd/rc/exec.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 54 insertions(+), 2 deletions(-)

(limited to 'src/cmd/rc/exec.c')

diff --git a/src/cmd/rc/exec.c b/src/cmd/rc/exec.c
index bd68bf5..bdbc151 100644
--- a/src/cmd/rc/exec.c
+++ b/src/cmd/rc/exec.c
@@ -5,16 +5,20 @@
 
 int yyparse(void);
 
-struct Builtin{
+struct Builtin
+{
 	char *name;
 	void (*func)(void);
 };
 
-struct State {
+#if 0
+struct State
+{
     int async;
 };
 
 static struct State state;
+#endif
 
 // -----------------------------------------------------------------------
 // globals
@@ -1414,6 +1418,54 @@ Xpipe(void)
     }
 }
 
+void
+Xpipefd(void)
+{
+    char name[40];
+    Thread *orig = runner;
+    int pc, fd, pid, pfd[2], sidefd, mainfd;
+
+    pc = runner->code.i;
+    if(pipe(pfd)<0){
+        Xerror("can't get pipe");
+        return;
+    }
+
+    if(runner->code.exe[runner->code.i].i == Rread)
+        fd=1, sidefd=pfd[1], mainfd=pfd[0];
+    else
+        fd=0, sidefd=pfd[0], mainfd=pfd[1];
+
+    switch(pid = fork()){
+    case -1:
+        Xerror("try again");
+        break;
+    case 0:
+        initchild(runner,1);
+
+        /* child 0 (writer) forked process */
+        run(runner->code.exe, pc+2, runner->local, 1);
+
+        close(mainfd);
+        pushredir(Ropen, sidefd, fd);
+        runner->caller = nil;
+        break;
+
+    default:
+        initparent(runner,pid,0);
+
+        close(sidefd);
+        pushredir(Ropen, mainfd, mainfd);
+
+        strcpy(name, "/dev/fd/");
+        str·itoa(name+8, mainfd);
+        pushword(name);
+
+        orig->code.i = orig->code.exe[pc+1].i;
+        break;
+    }
+}
+
 void
 Xbasic(void)
 {
-- 
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