spawn() problem

hi all,

i am trying to spawn a process using spawn() API, i have pasted code
snippets below and also the error.

#include <spawn.h>
#include <sys/errno.h>
#include <qp0z1170.h>

extern char **environ;

void main()
{
pid_t child_pid;
char pgm_nam[] = "/qsys.lib/srikanth.lib/fileio.pgm";
char **envVars;
struct inheritance inherit = {0};
.....
.....
Qp0zInitEnv();
envVars = environ;

inherit.pgroup = SPAWN_NEWPGROUP;
inherit.flags    = SPAWN_SETPGROUP;

child_pid = spawn(pgm_nam,
                        0,
                        NULL,
                        &inherit,
                        NULL,
                        envVars);
......
......


}

i am getting error "invalid argument", after calling spawn(); child_pid = -1
and value in errno = 3021. i am not able to figure out which argument i have
passed is wrong.
also if somebody has any literature/documents on process and thread related
programming, it will be great of great help if you can forward them to me.

kindly help.


thanks in advance.
srikanth d
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