doconfig(3NSL)					       Networking Services Library Functions					    doconfig(3NSL)

NAME

       doconfig - execute a configuration script

SYNOPSIS

       cc [ flag ... ] file ... -lnsl [ library ... ]
       # include <sac.h>

       int doconfig(int fildes, char *script, long rflag);

DESCRIPTION

       doconfig()   is	 a  Service  Access  Facility  library	function  that	interprets  the  configuration	scripts  contained  in	the  files
       </etc/saf/pmtag/_config>, </etc/saf/_sysconfig>, and </etc/saf/pmtag/svctag>, where  pmtag specifies the tag associated with the port moni-
       tor, and svctag specifies the service tag associated with a given service.   See pmadm(1M) and sacadm(1M).

       script  is the name of the configuration script; fildes is a file descriptor that designates the stream to which stream manipulation opera-
       tions are to be applied; rflag is a bitmask that indicates the mode in which script is to be interpreted. If rflag is zero, all commands in
       the  configuration  script  are eligible to be interpreted. If rflag has the NOASSIGN bit set, the assign command is considered illegal and
       will generate an error return. If rflag has the NORUN bit set, the run and runwait commands are considered illegal and will generate  error
       returns.

       The configuration language in which script is written consists of a sequence of commands, each of which is interpreted separately. The fol-
       lowing reserved keywords are defined:  assign, push, pop, runwait, and run. The comment character is #; when a # occurs on a  line,  every-
       thing from that point to the end of the line is ignored. Blank lines are not significant. No line in a command script may exceed 1024 char-
       acters.

       assign variable=value

	   Used to define environment variables. variable is the name of the environment variable and value is the value to be assigned to it. The
	   value  assigned  must  be a string constant; no form of parameter substitution is available. value may be quoted. The quoting rules are
	   those used by the shell for defining environment variables. assign will fail if space cannot be allocated for the new  variable  or	if
	   any part of the specification is invalid.

       push module1[, module2, module3, . . .]

	   Used to push STREAMS modules onto the stream designated by fildes. module1 is the name of the first module to be pushed, module2 is the
	   name of the second module to be pushed, etc. The command will fail if any of the named modules cannot be pushed. If a module cannot	be
	   pushed, the subsequent modules on the same command line will be ignored and modules that have already been pushed will be popped.

       pop [module]

	   Used to pop STREAMS modules off the designated stream. If pop is invoked with no arguments, the top module on the  stream is popped. If
	   an argument is given, modules will be popped one at a time until the named module is at the top of the stream. If the named	module	is
	   not	on  the designated stream, the stream is left as it was and the command fails. If module is the special keyword ALL, then all mod-
	   ules on the stream will be popped. Note that only modules above the topmost driver are affected.

       runwait command

	   The runwait command runs a command and waits for it to complete. command is the pathname of the command to be run. The command  is  run
	   with  /usr/bin/sh  -c  prepended to it; shell scripts may thus be executed from configuration scripts. The runwait command will fail if
	   command cannot be found or cannot be executed, or if command exits with a non-zero status.

       run command

	   The run command is identical to runwait except that it does not wait for command to complete. command is the pathname of the command to
	   be run. run will not fail unless it is unable to create a child process to execute the command.

       Although  they  are  syntactically  indistinguishable, some of the commands available to run and runwait are interpreter built-in commands.
       Interpreter built-ins are used when it is necessary to alter the state of a process within the context  of  that  process.  The	doconfig()
       interpreter  built-in  commands are similar to the shell special commands and, like these, they do not spawn another process for execution.
       See sh(1).  The built-in commands are:

	      cd
	      ulimit
	      umask

RETURN VALUES

       doconfig() returns 0 if the script was interpreted successfully. If a command in the script fails, the interpretation of the script  ceases
       at  that  point and a positive number is returned; this number indicates which line in the script failed. If a system error occurs, a value
       of -1 is returned. When a script fails, the process whose environment was being established should not be started.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       sh(1), pmadm(1M), sacadm(1M), attributes(5)

NOTES

       This interface is unsafe in multithreaded applications.	Unsafe interfaces should be called only from the main thread.

SunOS 5.10							    30 Dec 1996 						    doconfig(3NSL)