ports(1M) System Administration Commands ports(1M)NAMEports - creates /dev entries and inittab entries for serial lines
SYNOPSIS
/usr/sbin/ports [-r rootdir]
DESCRIPTIONdevfsadm(1M) is now the preferred command for /dev and /devices and
should be used instead of ports.
The ports command creates symbolic links in the /dev/term and /dev/cua
directories to the serial-port character device files in /devices and
adds new entries in /etc/inittab for non-system ports found. System-
board ports are given single lower-case letters for names (such as a
and b) while other ports are named numerically.
ports searches the kernel device tree to find the serial devices
attached to the system. It also checks /dev/term and /dev/cua to see
what symbolic links to serial devices already exist. ports then per‐
forms the following:
1. Assigns new numbers (or letters for system-board ports) to ports
that are attached to the system but do not have /dev/term and
/dev/cua entries. The numbers or letters assigned are the lowest-
unused numbers or letters.
2. Removes dangling links: links from /dev/term and /dev/cua pointing
to no-longer-existing ports.
3. Creates new /dev/term and /dev/cua links for new serial devices.
4. Invokes sacadm(1M) to make new port monitor entries for the new
devices. This is not done automatically for on-board ports; on
workstations these ports are often not used for dial-in sessions,
so a port-monitor for one of these ports must be created explic‐
itly.
If the configuration has not changed, ports exits without doing any‐
thing.
Notice to Driver Writers
ports considers devices with a node type of DDI_NT_SERIAL,
DDI_NT_SERIAL_MB, DDI_NT_SERIAL_DO, or DDI_NT_SERIAL_MB_DO to be serial
port devices. Devices with one of these node types must create minor
device names that obey the following conventions when calling ddi_cre‐
ate_minor_node(9F).
· The minor name for non-system port devices (DDI_NT_SERIAL) con‐
sists of an ASCII numeric string, where the first port on the
device is named 0, the second named 1, the third named 2, up to
the number of ports provided by the device.
· The minor name for non-system dialout devices (DDI_NT_SERIAL_DO)
is the ASCII numeric port name, concatenated with ,cu. For exam‐
ple, the minor name for the first dialout port on the serial board
is 0,cu.
·
The minor name for system-board port devices (DDI_NT_SERIAL_MB)
consists of a string containing a single ASCII lowercase charac‐
ter, where the first port on the device is named a, the second is
named b, the third is named c, for all ports on the device (or up
through port z).
· The minor name for system-board dialout devices
(DDI_NT_SERIAL_MB_DO) consists of the lowercase character port
name, concatenated with ,cu. For example, the minor name for the
first dialout port on the on-board serial device is a,cu.
To prevent disks from attempting to automatically generate links for a
device, drivers must specify a private node type and refrain from using
one of the above node types when calling ddi_create_minor_node(9F).
OPTIONS
The following options are supported:
-r rootdir Causes ports to presume that the /dev/term, /dev/cua,
and /devices directories are found under rootdir, not
directly under /. If this argument is specified,
sacadm(1M) is not invoked, since it would update termi‐
nal administration files under /etc without regard to
the rootdir.
EXAMPLES
Example 1: Creating the Serial and Dialout Minor Device Nodes
The following example creates the serial and dialout minor device nodes
from the xkserial driver's attach(9E) function:
/*
* Create the minor number by combining the instance number
* with the port number.
*/ #define XKNUMPORTS 8
#define XKMINORNUM(i, p) ((i) << 4 | (p))
#define XKMINORNUM_DO(i, p) ((i) << 4 | (p) | 0x80)
int
xkserialattach(dev_info_t *dip, ddi_attach_cmd_t cmd)
{
int instance, portnum;
char name[8];
/* other stuff in attach... */
instance = ddi_get_instance(dip);
for (portnum = 0; portnum < XKNUMPORTS; portnum++) {
/*
* create the serial port device
*/
sprintf(name, "%d", portnum);
ddi_create_minor_node(dip, name, S_IFCHR,
XKMINORNUM(instance, portnum), DDI_NT_SERIAL, 0);
/*
* create the dialout device
*/
sprintf(name,"%d,cu", portnum);
ddi_create_minor_node(dip, name, S_IFCHR,
XKMINORNUM_DO(instance, portnum), DDI_NT_SERIAL_DO, 0);
}
}
Example 2: Installing the xkserial Port Driver on a Sun Fire 4800
The following example installs the xkserial port driver on a Sun Fire
4800 (with the driver controlling the fictional XKSerial 8 port serial
board), with these special files in /devices:
# ls -l /devices/ssm@0,0/pci@18,700000/pci@1/xkserial@f,800000/
crw-r----- 1 root sys 32, 16 Aug 29 00:02 xkserial@2000:0
crw-r----- 1 root sys 32, 144 Aug 29 00:02 xkserial@2000:0,cu
crw-r----- 1 root sys 32, 17 Aug 29 00:02 xkserial@2000:1
crw-r----- 1 root sys 32, 145 Aug 29 00:02 xkserial@2000:1,cu
crw-r----- 1 root sys 32, 18 Aug 29 00:02 xkserial@2000:2
crw-r----- 1 root sys 32, 146 Aug 29 00:02 xkserial@2000:2,cu
crw-r----- 1 root sys 32, 19 Aug 29 00:02 xkserial@2000:3
crw-r----- 1 root sys 32, 147 Aug 29 00:02 xkserial@2000:3,cu
crw-r----- 1 root sys 32, 20 Aug 29 00:02 xkserial@2000:4
crw-r----- 1 root sys 32, 148 Aug 29 00:02 xkserial@2000:4,cu
crw-r----- 1 root sys 32, 21 Aug 29 00:02 xkserial@2000:5
crw-r----- 1 root sys 32, 149 Aug 29 00:02 xkserial@2000:5,cu
crw-r----- 1 root sys 32, 22 Aug 29 00:02 xkserial@2000:6
crw-r----- 1 root sys 32, 150 Aug 29 00:02 xkserial@2000:6,cu
crw-r----- 1 root sys 32, 23 Aug 29 00:02 xkserial@2000:7
crw-r----- 1 root sys 32, 151 Aug 29 00:02 xkserial@2000:7,cu
/dev/term contain symbolic links to the serial port device nodes in
/devices
# ls -l /dev/term
/dev/term/0 -> ../../devices/[....]/xkserial@2000:0
/dev/term/1 -> ../../devices/[....]/xkserial@2000:1
/dev/term/2 -> ../../devices/[....]/xkserial@2000:2
/dev/term/3 -> ../../devices/[....]/xkserial@2000:3
/dev/term/4 -> ../../devices/[....]/xkserial@2000:4
/dev/term/5 -> ../../devices/[....]/xkserial@2000:5
/dev/term/6 -> ../../devices/[....]/xkserial@2000:6
/dev/term/7 -> ../../devices/[....]/xkserial@2000:7
and /dev/cua contain symbolic links to the dialout port device nodes in
/devices
# ls -l /dev/cua
/dev/cua/0 -> ../../devices/[....]/xkserial@2000:0,cu
/dev/cua/1 -> ../../devices/[....]/xkserial@2000:1,cu
/dev/cua/2 -> ../../devices/[....]/xkserial@2000:2,cu
/dev/cua/3 -> ../../devices/[....]/xkserial@2000:3,cu
/dev/cua/4 -> ../../devices/[....]/xkserial@2000:4,cu
/dev/cua/5 -> ../../devices/[....]/xkserial@2000:5,cu
/dev/cua/6 -> ../../devices/[....]/xkserial@2000:6,cu
/dev/cua/7 -> ../../devices/[....]/xkserial@2000:7,cu
FILES
/dev/term/n Logical serial port devices
/dev/cua/n Logical dialout port devices
/etc/inittab
/etc/saf/*
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Availability │ SUNWcsu │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOadd_drv(1M), devfsadm(1M), drvconfig(1M), pmadm(1M), sacadm(1M),
attributes(5), devfs(7FS), attach(9E), ddi_create_minor_node(9F)
Writing Device Drivers
SunOS 5.10 8 Nov 2002 ports(1M)
