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Annotation of xinu/sys/shell/x_ps.c, revision 1.1

1.1     ! root        1: /* x_ps.c - x_ps */
        !             2: 
        !             3: #include <conf.h>
        !             4: #include <kernel.h>
        !             5: #include <proc.h>
        !             6: 
        !             7: LOCAL  char    hd1[] =
        !             8:        "pid   name   state prio  stack range  stack length sem  message\n";
        !             9: LOCAL  char    hd2[] =
        !            10:        "--- -------- ----- ---- ------------- ------------ --- ---------\n";
        !            11: LOCAL  char    *pstnams[] = {"curr ","free ","ready","recv ",
        !            12:                            "sleep","susp ","wait ","rtim "};
        !            13: LOCAL  int     psavsp;
        !            14: 
        !            15: /*------------------------------------------------------------------------
        !            16:  *  x_ps  -  (command ps) format and print process table information
        !            17:  *------------------------------------------------------------------------
        !            18:  */
        !            19: COMMAND        x_ps(stdin, stdout, stderr, nargs, args)
        !            20: int    stdin, stdout, stderr, nargs;
        !            21: char   *args[];
        !            22: {
        !            23:        int     i;
        !            24:        char    str[80];
        !            25:        struct  pentry  *pptr;
        !            26:        unsigned currstk;
        !            27: 
        !            28:        asm("movl sp,_psavsp"); /* capture current stack pointer */
        !            29:        proctab[currpid].pregs[SPINDX] = psavsp;
        !            30:        write(stdout, hd1, strlen(hd1));
        !            31:        write(stdout, hd2, strlen(hd2));
        !            32:        for (i=0 ; i<NPROC ; i++) {
        !            33:                if ((pptr = &proctab[i])->pstate == PRFREE)
        !            34:                        continue;
        !            35:                sprintf(str, "%3d %8s %s ", i, pptr->pname,
        !            36:                        pstnams[pptr->pstate-1]);
        !            37:                write(stdout, str, strlen(str));
        !            38:                sprintf(str, "%4d %6x-%6x ", pptr->pprio,  pptr->plimit,
        !            39:                        (unsigned)pptr->pbase + sizeof(int)-1);
        !            40:                write(stdout, str, strlen(str));
        !            41:                currstk = pptr->pregs[SPINDX];
        !            42:                if (currstk < pptr->plimit || currstk > pptr->pbase)
        !            43:                        sprintf(str, "OVERFLOWED   ");
        !            44:                else
        !            45:                        sprintf(str, "%4d / %4d  ", pptr->pbase - currstk,
        !            46:                                pptr->pstklen);
        !            47:                write(stdout, str, strlen(str));
        !            48:                if (pptr->pstate == PRWAIT)
        !            49:                        sprintf(str, "%3d", pptr->psem);
        !            50:                else
        !            51:                        sprintf(str, " - ");
        !            52:                write(stdout, str, strlen(str));
        !            53:                if (pptr->phasmsg)
        !            54:                        sprintf(str, "%10x\n", pptr->pmsg);
        !            55:                else
        !            56:                        sprintf(str, "     -\n");
        !            57:                write(stdout, str, strlen(str));
        !            58:        }
        !            59: }

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