From 4c31a79f1f76b6d80fffd05180dadcbb5a882293 Mon Sep 17 00:00:00 2001
From: Brian Cully <bjc@kublai.com>
Date: Sun, 2 Mar 2008 11:44:52 -0500
Subject: Move logger/io routines to separate modules.

---
 src/io.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 src/io.c

(limited to 'src/io.c')

diff --git a/src/io.c b/src/io.c
new file mode 100644
index 0000000..e255f61
--- /dev/null
+++ b/src/io.c
@@ -0,0 +1,55 @@
+#include "io.h"
+#include "log.h"
+
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <unistd.h>
+
+int
+restartable_read(unsigned char *buf, size_t buflen)
+{
+  ssize_t rc, readb;
+
+  rc = 0;
+  READLOOP:
+  while (rc < buflen) {
+    readb = read(STDIN_FILENO, buf + rc, buflen - rc);
+    if (readb == -1) {
+      if (errno == EAGAIN || errno == EINTR)
+        goto READLOOP;
+
+      return -1;
+    } else if (readb == 0) {
+      logmsg("ERROR: EOF trying to read additional %d bytes from "
+             "standard input", buflen - rc);
+      return -1;
+    }
+
+    rc += readb;
+  }
+
+  return rc;
+}
+
+int
+restartable_write(const unsigned char *buf, size_t buflen)
+{
+  ssize_t rc, wroteb;
+
+  rc = 0;
+  WRITELOOP:
+  while (rc < buflen) {
+    wroteb = write(STDOUT_FILENO, buf + rc, buflen - rc);
+    if (wroteb == -1) {
+      if (errno == EAGAIN || errno == EINTR)
+        goto WRITELOOP;
+
+      return -1;
+    }
+
+    rc += wroteb;
+  }
+
+  return rc;
+}
-- 
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