[PATCH] vmsplice: allow for setting of SPLICE_F_GIFT flag.

[splice.git] / vmsplice.c

diff --git a/vmsplice.c b/vmsplice.c
index 5c0b1edf1b433989e048dca5cba9ad3233149764..0382f46444de05c8059b479fe26f8f17efedb033 100644 (file)
--- a/vmsplice.c
+++ b/vmsplice.c
@@ -17,6 +17,8 @@
 
 static int do_clear;
 static int align_mask = 65535;
+static int force_unalign;
+static int splice_flags;
 
 int do_vmsplice(int fd, void *b1, void *b2, int len)
 {
@@ -42,7 +44,7 @@ int do_vmsplice(int fd, void *b1, void *b2, int len)
                if (poll(&pfd, 1, -1) < 0)
                        return error("poll");
 
-               written = vmsplice(fd, &iov[idx], 2 - idx, 0);
+               written = vmsplice(fd, &iov[idx], 2 - idx, splice_flags);
 
                if (written <= 0)
                        return error("vmsplice");
@@ -65,7 +67,7 @@ int do_vmsplice(int fd, void *b1, void *b2, int len)
 
 static int usage(char *name)
 {
-       fprintf(stderr, "%s: [-c(lear)] [-u(nalign)] | ...\n", name);
+       fprintf(stderr, "%s: [-c(lear)] [-u(nalign)] [-g(ift)]| ...\n", name);
        return 1;
 }
 
@@ -73,14 +75,18 @@ static int parse_options(int argc, char *argv[])
 {
        int c, index = 1;
 
-       while ((c = getopt(argc, argv, "cu")) != -1) {
+       while ((c = getopt(argc, argv, "cug")) != -1) {
                switch (c) {
                case 'c':
                        do_clear = 1;
                        index++;
                        break;
                case 'u':
-                       align_mask = 0;
+                       force_unalign = 1;
+                       index++;
+                       break;
+               case 'g':
+                       splice_flags = SPLICE_F_GIFT;
                        index++;
                        break;
                default:
@@ -104,6 +110,11 @@ int main(int argc, char *argv[])
        b1 = ALIGN(malloc(SPLICE_SIZE + align_mask));
        b2 = ALIGN(malloc(SPLICE_SIZE + align_mask));
 
+       if (force_unalign) {
+               b1 += 1024;
+               b2 += 1024;
+       }
+
        memset(b1, 0xaa, SPLICE_SIZE);
        memset(b2, 0xbb, SPLICE_SIZE);