From 0d0f7a0e7c32842edff533246a1f8523306f9ab0 Mon Sep 17 00:00:00 2001
From: John Denker <jsd@av8n.com>
Date: Fri, 1 Jun 2012 23:07:51 -0700
Subject: as downloaded : ucspi-tcp

---
 ucspi-tcp-0.88/fixcrio.c | 161 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 161 insertions(+)
 create mode 100644 ucspi-tcp-0.88/fixcrio.c

(limited to 'ucspi-tcp-0.88/fixcrio.c')

diff --git a/ucspi-tcp-0.88/fixcrio.c b/ucspi-tcp-0.88/fixcrio.c
new file mode 100644
index 0000000..dbd4fa4
--- /dev/null
+++ b/ucspi-tcp-0.88/fixcrio.c
@@ -0,0 +1,161 @@
+#include "sig.h"
+#include "buffer.h"
+#include "strerr.h"
+#include "byte.h"
+#include "readwrite.h"
+#include "exit.h"
+#include "iopause.h"
+#include "pathexec.h"
+
+#define FATAL "fixcrio: fatal: "
+
+char prebuf[256];
+
+int leftstatus = 0;
+char leftbuf[512];
+int leftlen;
+int leftpos;
+int leftflagcr = 0;
+
+int rightstatus = 0;
+char rightbuf[512];
+int rightlen;
+int rightpos;
+int rightflagcr = 0;
+
+void doit(int fdleft,int fdright)
+{
+  struct taia stamp;
+  struct taia deadline;
+  iopause_fd x[4];
+  int xlen;
+  iopause_fd *io0;
+  iopause_fd *ioleft;
+  iopause_fd *io1;
+  iopause_fd *ioright;
+  int r;
+  int i;
+  char ch;
+
+  for (;;) {
+    xlen = 0;
+
+    io0 = 0;
+    if (leftstatus == 0) {
+      io0 = &x[xlen++];
+      io0->fd = 0;
+      io0->events = IOPAUSE_READ;
+    }
+    ioleft = 0;
+    if (leftstatus == 1) {
+      ioleft = &x[xlen++];
+      ioleft->fd = fdleft;
+      ioleft->events = IOPAUSE_WRITE;
+    }
+
+    ioright = 0;
+    if (rightstatus == 0) {
+      ioright = &x[xlen++];
+      ioright->fd = fdright;
+      ioright->events = IOPAUSE_READ;
+    }
+    io1 = 0;
+    if (rightstatus == 1) {
+      io1 = &x[xlen++];
+      io1->fd = 1;
+      io1->events = IOPAUSE_WRITE;
+    }
+
+    taia_now(&stamp);
+    taia_uint(&deadline,3600);
+    taia_add(&deadline,&stamp,&deadline);
+    iopause(x,xlen,&deadline,&stamp);
+
+    if (io0 && io0->revents) {
+      r = read(0,prebuf,sizeof prebuf);
+      if (r <= 0) {
+        leftstatus = -1;
+        close(fdleft);
+      }
+      else {
+        leftstatus = 1;
+	leftpos = 0;
+	leftlen = 0;
+	for (i = 0;i < r;++i) {
+	  ch = prebuf[i];
+	  if (ch == '\n')
+	    if (!leftflagcr)
+	      leftbuf[leftlen++] = '\r';
+	  leftbuf[leftlen++] = ch;
+	  leftflagcr = (ch == '\r');
+	}
+      }
+    }
+
+    if (ioleft && ioleft->revents) {
+      r = write(fdleft,leftbuf + leftpos,leftlen - leftpos);
+      if (r == -1) break;
+      leftpos += r;
+      if (leftpos == leftlen) leftstatus = 0;
+    }
+
+    if (ioright && ioright->revents) {
+      r = read(fdright,prebuf,sizeof prebuf);
+      if (r <= 0) break;
+      rightstatus = 1;
+      rightpos = 0;
+      rightlen = 0;
+      for (i = 0;i < r;++i) {
+	ch = prebuf[i];
+	if (ch == '\n')
+	  if (!rightflagcr)
+	    rightbuf[rightlen++] = '\r';
+	rightbuf[rightlen++] = ch;
+	rightflagcr = (ch == '\r');
+      }
+    }
+
+    if (io1 && io1->revents) {
+      r = write(1,rightbuf + rightpos,rightlen - rightpos);
+      if (r == -1) break;
+      rightpos += r;
+      if (rightpos == rightlen) rightstatus = 0;
+    }
+  }
+
+  _exit(0);
+}
+
+main(int argc,char **argv,char **envp)
+{
+  int piin[2];
+  int piout[2];
+
+  if (argc < 2)
+    strerr_die1x(100,"fixcrio: usage: fixcrio program [ arg ... ]");
+
+  if (pipe(piin) == -1)
+    strerr_die2sys(111,FATAL,"unable to create pipe: ");
+  if (pipe(piout) == -1)
+    strerr_die2sys(111,FATAL,"unable to create pipe: ");
+
+  switch(fork()) {
+    case -1:
+      strerr_die2sys(111,FATAL,"unable to fork: ");
+    case 0:
+      sig_ignore(sig_pipe);
+      close(piin[0]);
+      close(piout[1]);
+      doit(piin[1],piout[0]);
+  }
+
+  close(piin[1]);
+  close(piout[0]);
+  if (fd_move(0,piin[0]) == -1)
+    strerr_die2sys(111,FATAL,"unable to move descriptors: ");
+  if (fd_move(1,piout[1]) == -1)
+    strerr_die2sys(111,FATAL,"unable to move descriptors: ");
+
+  pathexec_run(argv[1],argv + 1,envp);
+  strerr_die4sys(111,FATAL,"unable to run ",argv[1],": ");
+}
-- 
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