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| author | Ron Yorston | 2015-07-19 23:05:20 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2015-07-19 23:05:20 +0200 |
| commit | d840c5d139cfa50fbe4f6f67c178b0edf0c690c8 (patch) | |
| tree | e75010ca3ce7769f53a6170ebe940f37c6a94dc1 /networking | |
| parent | 78cfa00154dca18a1326d2064121bf65cd081781 (diff) | |
| download | busybox-d840c5d139cfa50fbe4f6f67c178b0edf0c690c8.zip busybox-d840c5d139cfa50fbe4f6f67c178b0edf0c690c8.tar.gz | |
libbb: add a function to make a copy of a region of memory
Introduce a library routine to package the idiom:
p = xmalloc(b, n);
memcpy(p, b, n);
and use it where possible. The example in traceroute used xzalloc
but it didn't need to.
function old new delta
xmemdup - 32 +32
last_main 834 826 -8
make_device 2321 2311 -10
common_traceroute_main 3698 3685 -13
readtoken1 3182 3168 -14
procps_scan 1222 1206 -16
forkchild 655 638 -17
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/6 up/down: 32/-78) Total: -46 bytes
Signed-off-by: Ron Yorston <rmy@frippery.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/traceroute.c | 11 | ||||
| -rw-r--r-- | networking/udhcp/d6_dhcpc.c | 2 |
2 files changed, 2 insertions, 11 deletions
diff --git a/networking/traceroute.c b/networking/traceroute.c index 97a7a19..12ba614 100644 --- a/networking/traceroute.c +++ b/networking/traceroute.c @@ -387,15 +387,6 @@ struct globals { #define outudp ((struct udphdr *)(outip + 1)) -/* libbb candidate? tftp uses this idiom too */ -static len_and_sockaddr* dup_sockaddr(const len_and_sockaddr *lsa) -{ - len_and_sockaddr *new_lsa = xzalloc(LSA_LEN_SIZE + lsa->len); - memcpy(new_lsa, lsa, LSA_LEN_SIZE + lsa->len); - return new_lsa; -} - - static int wait_for_reply(len_and_sockaddr *from_lsa, struct sockaddr *to, unsigned *timestamp_us, int *left_ms) { @@ -1074,7 +1065,7 @@ common_traceroute_main(int op, char **argv) printf(" from %s", source); printf(", %d hops max, %d byte packets\n", max_ttl, packlen); - from_lsa = dup_sockaddr(dest_lsa); + from_lsa = xmemdup(dest_lsa, LSA_LEN_SIZE + dest_lsa->len); lastaddr = xzalloc(dest_lsa->len); to = xzalloc(dest_lsa->len); seq = 0; diff --git a/networking/udhcp/d6_dhcpc.c b/networking/udhcp/d6_dhcpc.c index 044f046..4e9b705 100644 --- a/networking/udhcp/d6_dhcpc.c +++ b/networking/udhcp/d6_dhcpc.c @@ -118,7 +118,7 @@ static void *d6_copy_option(uint8_t *option, uint8_t *option_end, unsigned code) uint8_t *opt = d6_find_option(option, option_end, code); if (!opt) return opt; - return memcpy(xmalloc(opt[3] + 4), opt, opt[3] + 4); + return xmemdup(opt, opt[3] + 4); } static void *d6_store_blob(void *dst, const void *src, unsigned len) |