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open syscall: O_EXCL support

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Matheus
2024-05-27 21:55:04 -03:00
parent e66217ada1
commit 24e8f648bb
1 changed files with 7 additions and 0 deletions
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kernel-src/sys/syscalls/open.c
+7
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@@ -28,6 +28,7 @@ syscallret_t syscall_openat(context_t *context, int dirfd, const char *path, int
ret.errno = dirfd_enter(pathbuf, dirfd, &dirfile, &dirnode); ret.errno = dirfd_enter(pathbuf, dirfd, &dirfile, &dirnode);
retry_open:
file_t *newfile = NULL; file_t *newfile = NULL;
int newfd; int newfd;
ret.errno = fd_new(flags & O_CLOEXEC, &newfile, &newfd); ret.errno = fd_new(flags & O_CLOEXEC, &newfile, &newfd);
@@ -36,6 +37,10 @@ syscallret_t syscall_openat(context_t *context, int dirfd, const char *path, int
vnode_t *vnode = NULL; vnode_t *vnode = NULL;
ret.errno = vfs_open(dirnode, pathbuf, fileflagstovnodeflags(flags), &vnode); ret.errno = vfs_open(dirnode, pathbuf, fileflagstovnodeflags(flags), &vnode);
if (ret.errno == 0 && (flags & O_CREAT) && (flags & O_EXCL)) {
ret.errno = EEXIST;
return ret;
}
if (ret.errno == ENOENT && (flags & O_CREAT)) { if (ret.errno == ENOENT && (flags & O_CREAT)) {
vattr_t attr = { vattr_t attr = {
@@ -45,6 +50,8 @@ syscallret_t syscall_openat(context_t *context, int dirfd, const char *path, int
}; };
ret.errno = vfs_create(dirnode, pathbuf, &attr, V_TYPE_REGULAR, &vnode); ret.errno = vfs_create(dirnode, pathbuf, &attr, V_TYPE_REGULAR, &vnode);
if (ret.errno == EEXIST && (flags & O_EXCL) == 0)
goto retry_open;
} }
if (ret.errno) if (ret.errno)