[libvirt] [PATCH] Introduce virFDStreamOpenPTY

[Roman Bogorodskiy]

Add virFDStreamOpenPTY() function which is a wrapper around
virFDStreamOpenFileInternal() with putting the device it opens into a
raw mode.

Make virChrdevOpen() use virFDStreamOpenPTY() for
VIR_DOMAIN_CHR_TYPE_PTY devices.

This fixes mangled console output when libvirt runs on FreeBSD as it
requires device it opens to be placed into a raw mode explicitly.
---
 src/conf/virchrdev.c |  2 +-
 src/fdstream.c       | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/fdstream.h       |  5 +++++
 3 files changed, 59 insertions(+), 1 deletion(-)

diff --git a/src/conf/virchrdev.c b/src/conf/virchrdev.c
index 3e6beaa..2fd9a6c 100644
--- a/src/conf/virchrdev.c
+++ b/src/conf/virchrdev.c
@@ -408,7 +408,7 @@ int virChrdevOpen(virChrdevsPtr devs,
     /* open the character device */
     switch (source->type) {
     case VIR_DOMAIN_CHR_TYPE_PTY:
-        if (virFDStreamOpenFile(st, path, 0, 0, O_RDWR) < 0)
+        if (virFDStreamOpenPTY(st, path, 0, 0, O_RDWR) < 0)
             goto error;
         break;
     case VIR_DOMAIN_CHR_TYPE_UNIX:
diff --git a/src/fdstream.c b/src/fdstream.c
index 04d62b8..39d58e0 100644
--- a/src/fdstream.c
+++ b/src/fdstream.c
@@ -31,6 +31,7 @@
 # include <sys/un.h>
 #endif
 #include <netinet/in.h>
+#include <termios.h>
 
 #include "fdstream.h"
 #include "virerror.h"
@@ -714,6 +715,58 @@ int virFDStreamCreateFile(virStreamPtr st,
                                        oflags | O_CREAT, mode);
 }
 
+#ifdef HAVE_CFMAKERAW
+int virFDStreamOpenPTY(virStreamPtr st,
+                       const char *path,
+                       unsigned long long offset,
+                       unsigned long long length,
+                       int oflags)
+{
+    struct virFDStreamData *fdst = NULL;
+    struct termios rawattr;
+
+    if (virFDStreamOpenFileInternal(st, path,
+                                    offset, length,
+                                    oflags | O_CREAT, 0) < 0)
+        return -1;
+
+    fdst = st->privateData;
+
+    if (tcgetattr(fdst->fd, &rawattr) < 0) {
+        virReportSystemError(errno,
+                             _("unable to get tty attributes: %s"),
+                             path);
+        goto cleanup;
+    }
+
+    cfmakeraw(&rawattr);
+
+    if (tcsetattr(fdst->fd, TCSANOW, &rawattr) < 0) {
+        virReportSystemError(errno,
+                             _("unable to set tty attributes: %s"),
+                             path);
+        goto cleanup;
+    }
+
+    return 0;
+
+cleanup:
+    virFDStreamClose(st);
+    return -1;
+}
+#else /* !HAVE_CFMAKERAW */
+int virFDStreamOpenPTY(virStreamPtr st,
+                       const char *path,
+                       unsigned long long offset,
+                       unsigned long long length,
+                       int oflags)
+{
+    return virFDStreamOpenFileInternal(st, path,
+                                       offset, length,
+                                       oflags | O_CREAT, 0);
+}
+#endif /* !HAVE_CFMAKERAW */
+
 int virFDStreamSetInternalCloseCb(virStreamPtr st,
                                   virFDStreamInternalCloseCb cb,
                                   void *opaque,
diff --git a/src/fdstream.h b/src/fdstream.h
index 3ca6256..9c7295d 100644
--- a/src/fdstream.h
+++ b/src/fdstream.h
@@ -54,6 +54,11 @@ int virFDStreamCreateFile(virStreamPtr st,
                           unsigned long long length,
                           int oflags,
                           mode_t mode);
+int virFDStreamOpenPTY(virStreamPtr st,
+                       const char *path,
+                       unsigned long long offset,
+                       unsigned long long length,
+                       int oflags);
 
 int virFDStreamSetInternalCloseCb(virStreamPtr st,
                                   virFDStreamInternalCloseCb cb,
-- 
1.8.4.2