diff options
Diffstat (limited to 'guts/fcntl.c')
| -rw-r--r-- | guts/fcntl.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/guts/fcntl.c b/guts/fcntl.c new file mode 100644 index 0000000..d03d40c --- /dev/null +++ b/guts/fcntl.c @@ -0,0 +1,68 @@ +/* + * static int + * wrap_fcntl(int fd, int cmd, ...struct flock *lock) { + * int rc = -1; + */ + long arg; + int save_errno; + + /* we don't know whether we need lock or arg; grab both, which + * should be safe enough on Linuxy systems. */ + va_start(ap, cmd); + arg = va_arg(ap, long); + va_end(ap); + + switch (cmd) { + case F_DUPFD: +#ifdef F_DUPFD_CLOEXEC + case F_DUPFD_CLOEXEC: +#endif + /* actually do something */ + rc = real_fcntl(fd, cmd, arg); + save_errno = errno; + if (rc != -1) { + pseudo_debug(2, "fcntl_dup: %d->%d\n", fd, rc); + pseudo_client_op(OP_DUP, 0, fd, rc, 0, 0); + } + errno = save_errno; + break; + /* no argument: */ + case F_GETFD: + case F_GETFL: + case F_GETOWN: + case F_GETSIG: + case F_GETLEASE: + rc = real_fcntl(fd, cmd); + break; + /* long argument */ + case F_SETFD: + case F_SETFL: + case F_SETOWN: + case F_SETSIG: + case F_SETLEASE: + case F_NOTIFY: + rc = real_fcntl(fd, cmd, arg); + break; + /* struct flock * argument */ + case F_GETLK: + case F_SETLK: + case F_SETLKW: + rc = real_fcntl(fd, cmd, lock); + break; +#if defined(F_GETLK64) && (F_GETLK64 != F_GETLK) + /* the cast is safe, all struct pointers must smell the same */ + case F_GETLK64: + case F_SETLK64: + case F_SETLKW64: + rc = real_fcntl(fd, cmd, (struct flock64 *) lock); + break; +#endif + default: + pseudo_diag("unknown fcntl argument %d, assuming long argument.\n", + cmd); + rc = real_fcntl(fd, cmd, arg); + break; + } +/* return rc; + * } + */ |