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Staticized some variables.

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Fixed initialization of pipe_pgid - don't default to pid 0 (swapper) for
SIGIO.

Added comments about other implicit initializations, mostly for struct
stat.

Fixed initialization of st_mode.  S_IFSOCK was for when pipes were sockets.
It is probably safe to fix the bogus S_ISFIFO() now that pipes can be
distinguished from sockets in all cases.

Don't return ENOSYS for inappropriate ioctls.
This commit is contained in:
Bruce Evans 1996-07-12 08:14:58 +00:00
parent 0cd97b2034
commit 3be8cc7800
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=17124
1 changed files with 12 additions and 5 deletions
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17
sys/kern/sys_pipe.c
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@ -16,7 +16,7 @@
* 4. Modifications may be freely made to this file if the above conditions
* are met.
*
* $Id: sys_pipe.c,v 1.17 1996/06/17 05:15:01 dyson Exp $
* $Id: sys_pipe.c,v 1.18 1996/07/04 04:36:56 dyson Exp $
*/
#ifndef OLD_PIPE
@ -122,7 +122,7 @@ static struct fileops pipeops =
* the amount of kva for pipes in general though.
*/
#define LIMITPIPEKVA (16*1024*1024)
int amountpipekva;
static int amountpipekva;
static void pipeclose __P((struct pipe *cpipe));
static void pipeinit __P((struct pipe *cpipe));
@ -240,6 +240,7 @@ pipeinit(cpipe)
cpipe->pipe_buffer.size = PIPE_SIZE;
/* Buffer kva gets dynamically allocated */
cpipe->pipe_buffer.buffer = NULL;
/* cpipe->pipe_buffer.object = invalid */
cpipe->pipe_state = 0;
cpipe->pipe_peer = NULL;
@ -250,6 +251,7 @@ pipeinit(cpipe)
cpipe->pipe_mtime = time;
splx(s);
bzero(&cpipe->pipe_sel, sizeof cpipe->pipe_sel);
cpipe->pipe_pgid = NO_PID;
#ifndef PIPE_NODIRECT
/*
@ -259,6 +261,7 @@ pipeinit(cpipe)
cpipe->pipe_map.kva = 0;
cpipe->pipe_map.pos = 0;
cpipe->pipe_map.npages = 0;
/* cpipe->pipe_map.ms[] = invalid */
#endif
}
@ -295,7 +298,6 @@ pipeunlock(cpipe)
cpipe->pipe_state &= ~PIPE_LWANT;
wakeup(cpipe);
}
return;
}
static __inline void
@ -921,7 +923,7 @@ pipe_ioctl(fp, cmd, data, p)
return (0);
}
return ENOSYS;
return (ENOTTY);
}
int
@ -977,13 +979,18 @@ pipe_stat(pipe, ub)
register struct stat *ub;
{
bzero((caddr_t)ub, sizeof (*ub));
ub->st_mode = S_IFSOCK;
ub->st_mode = S_IFIFO;
ub->st_blksize = pipe->pipe_buffer.size;
ub->st_size = pipe->pipe_buffer.cnt;
ub->st_blocks = (ub->st_size + ub->st_blksize - 1) / ub->st_blksize;
TIMEVAL_TO_TIMESPEC(&pipe->pipe_atime, &ub->st_atimespec);
TIMEVAL_TO_TIMESPEC(&pipe->pipe_mtime, &ub->st_mtimespec);
TIMEVAL_TO_TIMESPEC(&pipe->pipe_ctime, &ub->st_ctimespec);
/*
* Left as 0: st_dev, st_ino, st_nlink, st_uid, st_gid, st_rdev,
* st_flags, st_gen.
* XXX (st_dev, st_ino) should be unique.
*/
return 0;
}