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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
View File

@ -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)
{

4
tools/firmware-utils/src/motorola-bin.c
View File

@ -170,7 +170,7 @@ int main(int argc, char **argv)
exit(3);
} else {
// all is well, write the file without the prefix
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, trx + sizeof(struct motorola), len - sizeof(struct motorola)) != len - sizeof(struct motorola)
|| close(fd) < 0)
{
@ -211,7 +211,7 @@ int main(int argc, char **argv)
firmware->crc = htonl(crc32buf((unsigned char *)&firmware->flags, sizeof(firmware->flags) + len));
// write the firmware
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, firmware, sizeof(struct motorola) + len) != sizeof(struct motorola) + len
|| close(fd) < 0)
{

2
tools/firmware-utils/src/ptgen.c
View File

@ -143,7 +143,7 @@ static int gen_ptable(int nr)
printf("%ld\n", ((long) len * 512));
}
if ((fd = open(filename, O_WRONLY|O_CREAT, 0644)) < 0) {
if ((fd = open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0644)) < 0) {
fprintf(stderr, "Can't open output file '%s'\n",filename);
return -1;
}