diff options
Diffstat (limited to 'sysdeps/mach/hurd/fcntl.c')
| -rw-r--r-- | sysdeps/mach/hurd/fcntl.c | 50 |
1 files changed, 46 insertions, 4 deletions
diff --git a/sysdeps/mach/hurd/fcntl.c b/sysdeps/mach/hurd/fcntl.c index b0349832a7..21ce766970 100644 --- a/sysdeps/mach/hurd/fcntl.c +++ b/sysdeps/mach/hurd/fcntl.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1992, 93, 94, 95, 96, 97 Free Software Foundation, Inc. +/* Copyright (C) 1992,93,94,95,96,97,99 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -21,6 +21,7 @@ #include <hurd.h> #include <hurd/fd.h> #include <stdarg.h> +#include <sys/file.h> /* XXX for LOCK_* */ /* Perform file control operations on FD. */ @@ -123,10 +124,51 @@ __fcntl (int fd, int cmd, ...) case F_SETLK: case F_SETLKW: { + /* XXX + We need new RPCs to support POSIX.1 fcntl file locking!! + For the time being we support the whole-file case only, + with all kinds of WRONG WRONG WRONG semantics, + by using flock. This is definitely the Wrong Thing, + but it might be better than nothing (?). */ struct flock *fl = va_arg (ap, struct flock *); - errno = fl?ENOSYS:EINVAL; /* XXX mib needs to implement io rpcs. */ - result = -1; - break; + va_end (ap); + switch (cmd) + { + case F_GETLK: + errno = ENOSYS; + return -1; + case F_SETLK: + cmd = LOCK_NB; + break; + default: + cmd = 0; + break; + } + switch (fl->l_type) + { + case F_RDLCK: cmd |= LOCK_SH; break; + case F_WRLCK: cmd |= LOCK_EX; break; + case F_UNLCK: cmd |= LOCK_UN; break; + default: + errno = EINVAL; + return -1; + } + switch (fl->l_whence) + { + case SEEK_SET: + if (fl->l_start == 0 && fl->l_len == 0) + break; + /* FALLTHROUGH */ + case SEEK_CUR: + case SEEK_END: + errno = ENOTSUP; + return -1; + default: + errno = EINVAL; + return -1; + } + + return __flock (fd, cmd); } case F_GETFL: /* Get per-open flags. */ |