blob: cbeca3b412589ddaa3f7414924643c901611d396 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
|
#!/bin/bash
# We want to catch any command failure, and exit immediately
set -e
# Download helper for wget
# Call it with:
# $1: URL
# $2: output file
# And this environment:
# WGET : the wget command to call
# BUILD_DIR: path to Buildroot's build dir
url="${1}"
output="${2}"
tmp_dl="$( mktemp "${BUILD_DIR}/.XXXXXX" )"
tmp_output="$( mktemp "${output}.XXXXXX" )"
# Play tic-tac-toe with temp files
# - first, we download to a trashable location (the build-dir)
# - then we copy to a temporary tarball in the final location, so it is
# on the same filesystem as the final file
# - finally, we atomically rename to the final file
ret=1
if ${WGET} -O "${tmp_dl}" "${url}"; then
if mv "${tmp_dl}" "${tmp_output}"; then
mv "${tmp_output}" "${output}"
ret=0
fi
fi
rm -f "${tmp_dl}" "${tmp_output}"
exit ${ret}
|
