/* xsh_ps.c - xsh_ps */

#include 
#include 
#include 

/*------------------------------------------------------------------------
 * xsh_ps - shell command to print the process table
 *------------------------------------------------------------------------
 */
shellcmd xsh_ps(int nargs, char *args[])
{
        struct  procent *prptr;         /* Pointer to process           */
        int32   i;                      /* Index into proctabl          */
        char *pstate[]  = {             /* Names for process states     */
                "free ", "curr ", "ready", "recv ", "sleep", "susp ",
                "wait ", "rtime"};

        /* For argument '--help', emit help about the 'ps' command      */

        if (nargs == 2 && strncmp(args[1], "--help", 7) == 0) {
                printf("Use: %s\n\n", args[0]);
                printf("Description:\n");
                printf("\tDisplays information about running processes\n");
                printf("Options:\n");
                printf("\t--help\t display this help and exit\n");
                return 0;
        }

        /* Check for valid number of arguments */

        if (nargs > 1) {
                fprintf(stderr, "%s: too many arguments\n", args[0]);
                fprintf(stderr, "Try '%s --help' for more information\n",
                                args[0]);
                return 1;
        }

        /* Print header for items from the process table */

        printf("%3s %-16s %5s %4s %4s %10s %-10s %10s\n",
                   "Pid", "Name", "State", "Prio", "Ppid", "Stack Base",
                   "Stack Ptr", "Stack Size");

        printf("%3s %-16s %5s %4s %4s %10s %-10s %10s\n",
                   "---", "----------------", "-----", "----", "----",
                   "----------", "----------", "----------");

        /* Output information for each process */

        for (i = 0; i < NPROC; i++) {
                prptr = &proctab[i];
                if (prptr->prstate == PR_FREE) {  /* Skip unused slots  */
                        continue;
                }
                printf("%3d %-16s %s %4d %4d 0x%08X 0x%08X %8d\n",
                        i, prptr->prname, pstate[(int)prptr->prstate],
                        prptr->prprio, prptr->prparent, prptr->prstkbase,
                        prptr->prstkptr, prptr->prstklen);
        }
        return 0;
}