doconfig(3N)                   DG/UX R4.11MU05                  doconfig(3N)


NAME
       doconfig - execute a configuration script

SYNOPSIS
       # include <sac.h> int doconfig(int fd, 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.

       script is the name of the configuration script; fd is a file
       descriptor that designates the stream to which stream manipulation
       operations are to be applied; rflag is a bitmask that indicates the
       mode in which script is to be interpreted.  rflag may take two
       values, NORUN and NOASSIGN, which may be or'd.  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
       following reserved keywords are defined:  assign, push, pop, runwait,
       and run.  The comment character is #; when a # occurs on a line,
       everything 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 characters.

       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 fd.
            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 modules 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 initial set of built-in commands is:
                 cd
                 ulimit
                 umask

DIAGNOSTICS
       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.

SEE ALSO
       pmadm(1M), sacadm(1M), sh(1).


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