doconfig(3C)                                                   doconfig(3C)

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 descrip-
     tor 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, 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 parame-
          ter substitution is available. value may be quoted. The quoting
          rules are those used by the shell for defining environment vari-
          ables. 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.






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doconfig(3C)                                                   doconfig(3C)

     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 com-
          mand 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 com-
     mands 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 inter-
     preter 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
     sh(1), pmadm(1M), sacadm(1M).








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