it's tsleep; it looks like this

SCCS-vsn: sys/miscfs/fifofs/fifo_vnops.c 7.2

diff --git a/usr/src/sys/miscfs/fifofs/fifo_vnops.c b/usr/src/sys/miscfs/fifofs/fifo_vnops.c
index 706c25f..5e09d9e 100644 (file)
--- a/usr/src/sys/miscfs/fifofs/fifo_vnops.c
+++ b/usr/src/sys/miscfs/fifofs/fifo_vnops.c
@@ -14,7 +14,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *

- *     @(#)fifo_vnops.c        7.1 (Berkeley) %G%
+ *     @(#)fifo_vnops.c        7.2 (Berkeley) %G%

  */
 
 #include "param.h"
  */
 
 #include "param.h"


@@ -117,6 +117,7 @@ fifo_open(vp, mode, cred)
        register struct fifoinfo *fip;
        struct socket *rso, *wso;
        int error;
        register struct fifoinfo *fip;
        struct socket *rso, *wso;
        int error;

+       static char openstr[] = "fifo";

 
        if ((mode & (FREAD|FWRITE)) == (FREAD|FWRITE))
                return (EINVAL);
 
        if ((mode & (FREAD|FWRITE)) == (FREAD|FWRITE))
                return (EINVAL);


@@ -150,8 +151,8 @@ fifo_open(vp, mode, cred)
                if (mode & O_NONBLOCK)
                        return (0);
                while (fip->fi_writers == 0)
                if (mode & O_NONBLOCK)
                        return (0);
                while (fip->fi_writers == 0)

-                       if (error = isleep((caddr_t)&fip->fi_readers, PZERO + 1,
-                           SLP_FIFO_OPEN, 0))
+                       if (error = tsleep((caddr_t)&fip->fi_readers, PSOCK,
+                           openstr, 0))

                                break;
        } else {
                fip->fi_writers++;
                                break;
        } else {
                fip->fi_writers++;


@@ -164,8 +165,8 @@ fifo_open(vp, mode, cred)
                                        wakeup((caddr_t)&fip->fi_readers);
                        }
                        while (fip->fi_readers == 0)
                                        wakeup((caddr_t)&fip->fi_readers);
                        }
                        while (fip->fi_readers == 0)

-                               if (error = isleep((caddr_t)&fip->fi_writers,
-                                   PZERO + 1, SLP_FIFO_OPEN, 0))
+                               if (error = tsleep((caddr_t)&fip->fi_writers,
+                                   PSOCK, openstr, 0))

                                        break;
                }
        }
                                        break;
                }
        }