| commit | 71974223e64327ab49c11a413eda1799d940f82c | |
| author | Guanqun Lu <guanqun.lu@gmail.com> | |
| Fri, 2 May 2008 13:51:53 +0000 (2 21:51 +0800) | ||
| committer | Guanqun Lu <guanqun.lu@gmail.com> | |
| Fri, 2 May 2008 13:51:53 +0000 (2 21:51 +0800) | ||
| tree | 00d7e542b2e872fb9a894f4ed47ec989cc6bed8f | treesnapshot (tar.gz zip) |
| parent | b4b8abf36776f9cae8231ae697b6bbf53a845867 | commitdiff |
fix O_RDWR bug.
when you open a file with the flag O_RDWR, you can't write to that
file, because originally:
perm = PTE_P |PTE_U |PTE_SHARE;
if (o->o_mode & O_WRONLY)
perm |= PTE_W;
if o->o_mode is O_RDWR, then this 'if' statement is false,
then this page has no write permission, causing page fault.
Signed-off-by: Guanqun Lu <guanqun.lu@gmail.com>
when you open a file with the flag O_RDWR, you can't write to that
file, because originally:
perm = PTE_P |PTE_U |PTE_SHARE;
if (o->o_mode & O_WRONLY)
perm |= PTE_W;
if o->o_mode is O_RDWR, then this 'if' statement is false,
then this page has no write permission, causing page fault.
Signed-off-by: Guanqun Lu <guanqun.lu@gmail.com>
| fs/serv.c | diffblobblamehistory |