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firmware-utils: when using open with O_CREAT and O_WRONLY, also use O_TRUNC to ensure that overwritten files have the right size (fixes #3505)

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12667 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
2008-09-23 16:12:40 +00:00
parent afb3c4be87
commit 1e232a2ad2
3 changed files with 4 additions and 4 deletions
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2
tools/firmware-utils/src/add_header.c
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@@ -122,7 +122,7 @@ int main(int argc, char **argv)
memcpy(buf, &header, sizeof(header));
// write the buf
if ((fd = open(argv[3], O_CREAT|O_WRONLY,0644)) < 0
if ((fd = open(argv[3], O_CREAT|O_WRONLY|O_TRUNC,0644)) < 0
|| write(fd, buf, buflen) != buflen
|| close(fd) < 0)
{