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| author | Rusty Russell <rusty@rustcorp.com.au> | 2010-08-27 18:39:48 +0400 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2010-08-27 03:09:51 +0400 |
| commit | f846619e7f875b0efa9853b1c821bbc756656d47 (patch) | |
| tree | 8d79aeea72a1d66e54b1c7ebf8db39d362ace9d0 /Documentation | |
| parent | d4348c678977c7093438bbbf2067c49396ae941b (diff) | |
| download | linux-f846619e7f875b0efa9853b1c821bbc756656d47.tar.xz | |
lguest: clean up warnings in demonstration launcher.
These days the headers we use are in glibc. If those are too old, you can
add the -I lines to get the kernel headers.
In file included from ../../include/linux/if_tun.h:19,
from lguest.c:33:
../../include/linux/types.h:13:2: warning: #warning "Attempt to use kernel headers from user space, see http://kernelnewbies.org/KernelHeaders"
lguest.c: In function ‘setup_tun_net’:
lguest.c:1456: warning: dereferencing pointer ‘sin’ does break strict-aliasing rules
lguest.c:1457: warning: dereferencing pointer ‘sin’ does break strict-aliasing rules
lguest.c:1450: note: initialized from here
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/lguest/Makefile | 3 | ||||
| -rw-r--r-- | Documentation/lguest/lguest.c | 23 |
2 files changed, 14 insertions, 12 deletions
diff --git a/Documentation/lguest/Makefile b/Documentation/lguest/Makefile index 28c8cdfcafd8..bebac6b4f332 100644 --- a/Documentation/lguest/Makefile +++ b/Documentation/lguest/Makefile @@ -1,5 +1,6 @@ # This creates the demonstration utility "lguest" which runs a Linux guest. -CFLAGS:=-m32 -Wall -Wmissing-declarations -Wmissing-prototypes -O3 -I../../include -I../../arch/x86/include -U_FORTIFY_SOURCE +# Missing headers? Add "-I../../include -I../../arch/x86/include" +CFLAGS:=-m32 -Wall -Wmissing-declarations -Wmissing-prototypes -O3 -U_FORTIFY_SOURCE all: lguest diff --git a/Documentation/lguest/lguest.c b/Documentation/lguest/lguest.c index e9ce3c554514..8a6a8c6d4980 100644 --- a/Documentation/lguest/lguest.c +++ b/Documentation/lguest/lguest.c @@ -39,14 +39,14 @@ #include <limits.h> #include <stddef.h> #include <signal.h> -#include "linux/lguest_launcher.h" -#include "linux/virtio_config.h" -#include "linux/virtio_net.h" -#include "linux/virtio_blk.h" -#include "linux/virtio_console.h" -#include "linux/virtio_rng.h" -#include "linux/virtio_ring.h" -#include "asm/bootparam.h" +#include <linux/virtio_config.h> +#include <linux/virtio_net.h> +#include <linux/virtio_blk.h> +#include <linux/virtio_console.h> +#include <linux/virtio_rng.h> +#include <linux/virtio_ring.h> +#include <asm/bootparam.h> +#include "../../include/linux/lguest_launcher.h" /*L:110 * We can ignore the 42 include files we need for this program, but I do want * to draw attention to the use of kernel-style types. @@ -1447,14 +1447,15 @@ static void add_to_bridge(int fd, const char *if_name, const char *br_name) static void configure_device(int fd, const char *tapif, u32 ipaddr) { struct ifreq ifr; - struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr; + struct sockaddr_in sin; memset(&ifr, 0, sizeof(ifr)); strcpy(ifr.ifr_name, tapif); /* Don't read these incantations. Just cut & paste them like I did! */ - sin->sin_family = AF_INET; - sin->sin_addr.s_addr = htonl(ipaddr); + sin.sin_family = AF_INET; + sin.sin_addr.s_addr = htonl(ipaddr); + memcpy(&ifr.ifr_addr, &sin, sizeof(sin)); if (ioctl(fd, SIOCSIFADDR, &ifr) != 0) err(1, "Setting %s interface address", tapif); ifr.ifr_flags = IFF_UP; |