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| author | Robert Morris <rtm@csail.mit.edu> | 2020-07-16 11:38:08 -0400 |
|---|---|---|
| committer | Robert Morris <rtm@csail.mit.edu> | 2020-07-16 11:38:08 -0400 |
| commit | f3979b7212f1bb9d72947f54abead5be973c6aed (patch) | |
| tree | 9e2e5cc663d2a3d56358121761755a4d3e878d6b /kernel/sysfile.c | |
| parent | c98e1afe7996b639fd36285240e9171b4866fe9d (diff) | |
| download | xv6-labs-f3979b7212f1bb9d72947f54abead5be973c6aed.tar.gz xv6-labs-f3979b7212f1bb9d72947f54abead5be973c6aed.tar.bz2 xv6-labs-f3979b7212f1bb9d72947f54abead5be973c6aed.zip | |
make "echo hello > x" truncate file x.
Diffstat (limited to 'kernel/sysfile.c')
| -rw-r--r-- | kernel/sysfile.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/sysfile.c b/kernel/sysfile.c index 7768d20..015c942 100644 --- a/kernel/sysfile.c +++ b/kernel/sysfile.c @@ -341,6 +341,10 @@ sys_open(void) f->readable = !(omode & O_WRONLY); f->writable = (omode & O_WRONLY) || (omode & O_RDWR); + if((omode & O_TRUNC) && ip->type == T_FILE){ + itrunc(ip); + } + iunlock(ip); end_op(); |