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[smlnj] View of /sml/trunk/src/runtime/c-libs/posix-procenv/getenv.c
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View of /sml/trunk/src/runtime/c-libs/posix-procenv/getenv.c

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Revision 651 - (download) (as text) (annotate)
Thu Jun 1 18:34:03 2000 UTC (20 years ago) by monnier
File size: 605 byte(s)
bring revisions from the vendor branch to the trunk
/* getenv.c
 *
 * COPYRIGHT (c) 1995 by AT&T Bell Laboratories.
 */

#include "ml-base.h"
#include "ml-values.h"
#include "ml-objects.h"
#include "cfun-proto-list.h"
#include <stdio.h>

/* _ml_P_ProcEnv_getenv: string -> string option
 *
 * Return value for environment name
 */
ml_val_t _ml_P_ProcEnv_getenv (ml_state_t *msp, ml_val_t arg)
{
    char     *sts;
    ml_val_t r, s;

    sts = getenv(STR_MLtoC(arg));
    if (sts == NIL(char *))
        r = OPTION_NONE;
    else {
        s = ML_CString(msp,sts);
        OPTION_SOME(msp, r, s)
    }
  
    return r;

} /* end of _ml_P_ProcEnv_getenv */


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