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2015-09-28tools: gen_eth_addr: add getpid() to time(0) to avoid duplicated seedJosh Wu
As 'time(0) | getpid()' will have a lot of duplicated value. It is not a expected behavior. We expect different value for the seed when when run it in many times. So this patch will left shift the getpid() and add to time(0). That avoid duplicated value. Test command is like: % RUN=0; while [ $RUN -lt 10000 ]; do tools/gen_eth_addr; RUN=$(($RUN+1)); done | sort | uniq | wc -l 10000 This patch is incorporated with suggestions made by Wolfgang Denk and Andreas Bießmann. Thanks them a lot. Signed-off-by: Josh Wu <josh.wu@atmel.com> Acked-by: Andreas Bießmann <andreas.devel@googlemail.com> Acked-by: Wolfgang Denk <wd@denx.de> Tested-by: Wolfgang Denk <wd@denx.de>
2013-07-24Add GPL-2.0+ SPDX-License-Identifier to source filesWolfgang Denk
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
2009-04-03gen_eth_addr: Use POSIX rand() and srand()Peter Tyser
Replace random()/srandom() use with rand()/srand() to support compilation with the mingw toolchain. The rand()/srand() functions are generally more common and are functionally equivalent to the original random()/srandom() calls. Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
2001-09-06Initial revisionwdenk