meson: remove OS definitions from config_targetos

[mirror_qemu.git] / fsdev / virtfs-proxy-helper.c

diff --git a/fsdev/virtfs-proxy-helper.c b/fsdev/virtfs-proxy-helper.c
index 5cafcd770318ec1e4f0750080b5ad850eee24715..144aaf585ad809af1fac146ae77d7ae96b61b225 100644 (file)
--- a/fsdev/virtfs-proxy-helper.c
+++ b/fsdev/virtfs-proxy-helper.c
@@ -9,6 +9,11 @@
  * the COPYING file in the top-level directory.
  */
 
+/*
+ * NOTE: The 9p 'proxy' backend is deprecated (since QEMU 8.1) and will be
+ * removed in a future version of QEMU!
+ */
+
 #include "qemu/osdep.h"
 #include <glib/gstdio.h>
 #include <sys/resource.h>
@@ -26,6 +31,7 @@
 #include "qemu/xattr.h"
 #include "9p-iov-marshal.h"
 #include "hw/9pfs/9p-proxy.h"
+#include "hw/9pfs/9p-util.h"
 #include "fsdev/9p-iov-marshal.h"
 
 #define PROGNAME "virtfs-proxy-helper"
@@ -338,6 +344,28 @@ static void resetugid(int suid, int sgid)
     }
 }
 
+/*
+ * Open regular file or directory. Attempts to open any special file are
+ * rejected.
+ *
+ * returns file descriptor or -1 on error
+ */
+static int open_regular(const char *pathname, int flags, mode_t mode)
+{
+    int fd;
+
+    fd = open(pathname, flags, mode);
+    if (fd < 0) {
+        return fd;
+    }
+
+    if (close_if_special_file(fd) < 0) {
+        return -1;
+    }
+
+    return fd;
+}
+
 /*
  * send response in two parts
  * 1) ProxyHeader
@@ -682,7 +710,7 @@ static int do_create(struct iovec *iovec)
     if (ret < 0) {
         goto unmarshal_err_out;
     }
-    ret = open(path.data, flags, mode);
+    ret = open_regular(path.data, flags, mode);
     if (ret < 0) {
         ret = -errno;
     }
@@ -707,7 +735,7 @@ static int do_open(struct iovec *iovec)
     if (ret < 0) {
         goto err_out;
     }
-    ret = open(path.data, flags);
+    ret = open_regular(path.data, flags, 0);
     if (ret < 0) {
         ret = -errno;
     }
@@ -1034,6 +1062,10 @@ int main(int argc, char **argv)
     struct statfs st_fs;
 #endif
 
+    fprintf(stderr, "NOTE: The 9p 'proxy' backend is deprecated (since "
+                    "QEMU 8.1) and will be removed in a future version of "
+                    "QEMU!\n");
+
     prog_name = g_path_get_basename(argv[0]);
 
     is_daemon = true;