spawnveg.3

Introduction to Library Functions                     SPAWNVEG(3)

NAME
     spawnveg - process spawn with process group and session con-
     trol

SYNOPSIS
     #include <ast.h>

     int spawnveg(const char* command, char** argv, char**  envv,
     pid_t pgid);

DESCRIPTION
     spwanveg combines fork(2), exec(2), setpgid(2) and setsid(2)
     into a single call.

     command, argv and envv are as in execve(2).   pgid  controls
     the new process group and session:

     <0   The new process becomes a session leader.  is called in
          the child context.

     0    The new process is in the callers process group.

     1    The new process becomes a process group leader.

     >1   The new process joins the process group pgid.

COMMENTS
     It is possible to code  all  process  creation  (except  for
     vfork(2)  hack  like in csh(1)) using spawnveg.  The proc(3)
     routines and ksh(1) do this on systems  that  don't  support
     fork(2).   This  makes  porting  to NT and Windows a snap: a
     simple iffe(1)  probe  provides  a  spawnveg  implementation
     using the NT or Windows process primitives.

SEE ALSO
     fork(2), exec(2), setpgid(2), setsid(2), spawnve(2)

SunOS 5.10                Last change:                          1

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