and added files
[bcm963xx.git] / userapps / opensource / net-snmp / agent / mibgroup / ucd-snmp / memory.c
diff --git a/userapps/opensource/net-snmp/agent/mibgroup/ucd-snmp/memory.c b/userapps/opensource/net-snmp/agent/mibgroup/ucd-snmp/memory.c
new file mode 100644 (file)
index 0000000..9f15699
--- /dev/null
@@ -0,0 +1,688 @@
+#include <net-snmp/net-snmp-config.h>
+
+#if HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#include <ctype.h>
+#include <signal.h>
+#if HAVE_MACHINE_PARAM_H
+#include <machine/param.h>
+#endif
+#if HAVE_SYS_VMMETER_H
+#if !defined(bsdi2) && !defined(netbsd1)
+#include <sys/vmmeter.h>
+#endif
+#endif
+#if HAVE_SYS_CONF_H
+#include <sys/conf.h>
+#endif
+#if HAVE_ASM_PAGE_H
+#include <asm/page.h>
+#endif
+#if HAVE_SYS_SWAP_H
+#include <sys/swap.h>
+#endif
+#if HAVE_SYS_FS_H
+#include <sys/fs.h>
+#else
+#if HAVE_UFS_FS_H
+#include <ufs/fs.h>
+#else
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#ifdef HAVE_SYS_VNODE_H
+#include <sys/vnode.h>
+#endif
+#ifdef HAVE_UFS_UFS_QUOTA_H
+#include <ufs/ufs/quota.h>
+#endif
+#ifdef HAVE_UFS_UFS_INODE_H
+#include <ufs/ufs/inode.h>
+#endif
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#if HAVE_UFS_FFS_FS_H
+#include <ufs/ffs/fs.h>
+#endif
+#endif
+#endif
+#if HAVE_MTAB_H
+#include <mtab.h>
+#endif
+#include <sys/stat.h>
+#include <errno.h>
+#if HAVE_FSTAB_H
+#include <fstab.h>
+#endif
+#if HAVE_SYS_STATVFS_H
+#include <sys/statvfs.h>
+#endif
+#if HAVE_SYS_VFS_H
+#include <sys/vfs.h>
+#endif
+#if (!defined(HAVE_STATVFS)) && defined(HAVE_STATFS)
+#if HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#if HAVE_SYS_MOUNT_H
+#include <sys/mount.h>
+#endif
+#if HAVE_SYS_SYSCTL_H
+#include <sys/sysctl.h>
+#endif
+#define statvfs statfs
+#endif
+#if HAVE_VM_SWAP_PAGER_H
+#include <vm/swap_pager.h>
+#endif
+#if HAVE_SYS_FIXPOINT_H
+#include <sys/fixpoint.h>
+#endif
+#if HAVE_MALLOC_H
+#include <malloc.h>
+#endif
+#if HAVE_STRING_H
+#include <string.h>
+#endif
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  include <time.h>
+# endif
+#endif
+#if defined(hpux10) || defined(hpux11)
+#include <sys/pstat.h>
+#endif
+
+#include <net-snmp/net-snmp-includes.h>
+#include <net-snmp/agent/net-snmp-agent-includes.h>
+#include <net-snmp/agent/auto_nlist.h>
+
+#include "mibdefs.h"
+#include "struct.h"
+#include "util_funcs.h"
+#include "memory.h"
+
+int             minimumswap;
+#ifndef linux
+static int      pageshift;      /* log base 2 of the pagesize */
+#endif
+
+#ifndef bsdi2
+#ifdef NSWAPDEV_SYMBOL
+int nswapdev=10;            /* taken from <machine/space.h> */
+#endif
+#ifdef NSWAPFS_SYMBOL
+int nswapfs=10;            /* taken from <machine/space.h> */
+#endif
+#endif      /* !bsdi2 */
+
+#define DEFAULTMINIMUMSWAP 16000        /* kilobytes */
+
+static FindVarMethod var_extensible_mem;
+
+void
+init_memory(void)
+{
+#ifndef linux
+    int             pagesize;
+#ifdef PHYSMEM_SYMBOL
+    auto_nlist(PHYSMEM_SYMBOL, 0, 0);
+#endif
+#ifdef TOTAL_MEMORY_SYMBOL
+    auto_nlist(TOTAL_MEMORY_SYMBOL, 0, 0);
+#endif
+#ifdef MBSTAT_SYMBOL
+    auto_nlist(MBSTAT_SYMBOL, 0, 0);
+#endif
+#ifdef SWDEVT_SYMBOL
+    auto_nlist(SWDEVT_SYMBOL, 0, 0);
+#endif
+#ifdef FSWDEVT_SYMBOL
+    auto_nlist(FSWDEVT_SYMBOL, 0, 0);
+#endif
+#ifdef NSWAPFS_SYMBOL
+    auto_nlist(NSWAPFS_SYMBOL, 0, 0);
+#endif
+#ifdef NSWAPDEV_SYMBOL
+    auto_nlist(NSWAPDEV_SYMBOL, 0, 0);
+#endif
+
+#ifndef bsdi2
+#ifdef NSWAPDEV_SYMBOL
+    if (auto_nlist(NSWAPDEV_SYMBOL, (char *) &nswapdev, sizeof(nswapdev))
+        == 0)
+        return;
+#endif
+#ifdef NSWAPFS_SYMBOL
+    if (auto_nlist(NSWAPFS_SYMBOL, (char *) &nswapfs, sizeof(nswapfs)) ==
+        0)
+        return;
+#endif
+#endif
+    pagesize = 1 << PGSHIFT;
+    pageshift = 0;
+    while (pagesize > 1) {
+        pageshift++;
+        pagesize >>= 1;
+    }
+    pageshift -= 10;
+#endif
+    {
+        struct variable2 extensible_mem_variables[] = {
+            {MIBINDEX, ASN_INTEGER, RONLY, var_extensible_mem, 1,
+             {MIBINDEX}},
+            {ERRORNAME, ASN_OCTET_STR, RONLY, var_extensible_mem, 1,
+             {ERRORNAME}},
+            {MEMTOTALSWAP, ASN_INTEGER, RONLY, var_extensible_mem, 1,
+             {MEMTOTALSWAP}},
+            {MEMAVAILSWAP, ASN_INTEGER, RONLY, var_extensible_mem, 1,
+             {MEMAVAILSWAP}},
+            {MEMTOTALREAL, ASN_INTEGER, RONLY, var_extensible_mem, 1,
+             {MEMTOTALREAL}},
+            {MEMAVAILREAL, ASN_INTEGER, RONLY, var_extensible_mem, 1,
+             {MEMAVAILREAL}},
+            {MEMTOTALSWAPTXT, ASN_INTEGER, RONLY, var_extensible_mem, 1,
+             {MEMTOTALSWAPTXT}},
+            {MEMUSEDSWAPTXT, ASN_INTEGER, RONLY, var_extensible_mem, 1,
+             {MEMUSEDSWAPTXT}},
+            {MEMTOTALREALTXT, ASN_INTEGER, RONLY, var_extensible_mem, 1,
+             {MEMTOTALREALTXT}},
+            {MEMUSEDREALTXT, ASN_INTEGER, RONLY, var_extensible_mem, 1,
+             {MEMUSEDREALTXT}},
+            {MEMTOTALFREE, ASN_INTEGER, RONLY, var_extensible_mem, 1,
+             {MEMTOTALFREE}},
+            {MEMSWAPMINIMUM, ASN_INTEGER, RONLY, var_extensible_mem, 1,
+             {MEMSWAPMINIMUM}},
+            {MEMSHARED, ASN_INTEGER, RONLY, var_extensible_mem, 1,
+             {MEMSHARED}},
+            {MEMBUFFER, ASN_INTEGER, RONLY, var_extensible_mem, 1,
+             {MEMBUFFER}},
+            {MEMCACHED, ASN_INTEGER, RONLY, var_extensible_mem, 1,
+             {MEMCACHED}},
+            {ERRORFLAG, ASN_INTEGER, RONLY, var_extensible_mem, 1,
+             {ERRORFLAG}},
+            {ERRORMSG, ASN_OCTET_STR, RONLY, var_extensible_mem, 1,
+             {ERRORMSG}}
+        };
+
+        /*
+         * Define the OID pointer to the top of the mib tree that we're
+         * registering underneath 
+         */
+        oid             mem_variables_oid[] = { UCDAVIS_MIB, MEMMIBNUM };
+
+        /*
+         * register ourselves with the agent to handle our mib tree 
+         */
+        REGISTER_MIB("ucd-snmp/memory", extensible_mem_variables,
+                     variable2, mem_variables_oid);
+
+        snmpd_register_config_handler("swap", memory_parse_config,
+                                      memory_free_config, "min-avail");
+    }
+}
+
+void
+memory_parse_config(const char *token, char *cptr)
+{
+    minimumswap = atoi(cptr);
+}
+
+void
+memory_free_config(void)
+{
+    minimumswap = DEFAULTMINIMUMSWAP;
+}
+
+#ifdef linux
+enum meminfo_row { meminfo_main = 0,
+    meminfo_swap
+};
+
+enum meminfo_col { meminfo_total = 0, meminfo_used, meminfo_free,
+    meminfo_shared, meminfo_buffers, meminfo_cached
+};
+#define MEMINFO_FILE "/proc/meminfo"
+
+static char     buf[300];
+
+/*
+ * This macro opens FILE only if necessary and seeks to 0 so that successive
+ * calls to the functions are more efficient.  It also reads the current
+ * contents of the file into the global buf.
+ */
+#define FILE_TO_BUF(FILE) {                                    \
+    static int n, fd = -1;                                     \
+    if (fd == -1 && (fd = open(FILE, O_RDONLY)) == -1) {       \
+       return 0;                                               \
+    }                                                          \
+    lseek(fd, 0L, SEEK_SET);                                   \
+    if ((n = read(fd, buf, sizeof buf - 1)) < 0) {             \
+       close(fd);                                              \
+       fd = -1;                                                \
+       return 0;                                               \
+    }                                                          \
+    buf[n] = '\0';                                             \
+}
+
+#define MAX_ROW 3               /* these are a little liberal for flexibility */
+#define MAX_COL 7
+
+unsigned      **
+meminfo(void)
+{
+    static unsigned *row[MAX_ROW + 1];  /* row pointers */
+    static unsigned num[MAX_ROW * MAX_COL];     /* number storage */
+    char           *p;
+    int             i, j, k, l;
+    unsigned long   m;
+
+    FILE_TO_BUF(MEMINFO_FILE)
+        if (!row[0])            /* init ptrs 1st time through */
+        for (i = 0; i < MAX_ROW; i++)   /* std column major order: */
+            row[i] = num + MAX_COL * i; /* A[i][j] = A + COLS*i + j */
+    p = buf;
+    for (i = 0; i < MAX_ROW; i++)       /* zero unassigned fields */
+        for (j = 0; j < MAX_COL; j++)
+            row[i][j] = 0;
+    for (i = 0; i < MAX_ROW && *p; i++) {       /* loop over rows */
+        while (*p && !isdigit(*p))
+            p++;                /* skip chars until a digit */
+        for (j = 0; j < MAX_COL && *p; j++) {   /* scanf column-by-column */
+            l = sscanf(p, "%lu%n", &m, &k);
+            m /= 1024;
+            if (0x7fffffff < m) {
+                *(row[i] + j) = 0x7fffffff;
+            } else {
+                *(row[i] + j) = (unsigned) m;
+            }
+            p += k;             /* step over used buffer */
+            if (*p == '\n' || l < 1)    /* end of line/buffer */
+                break;
+        }
+    }
+    /*
+     * row[i+1] = NULL;     terminate the row list, currently unnecessary 
+     */
+    return row;                 /* NULL return ==> error */
+}
+
+unsigned
+memory(int iindex)
+{
+    unsigned      **mem = meminfo();
+    if (mem != NULL)
+        return mem[meminfo_main][iindex];
+    else
+        return -1;
+}
+
+unsigned
+memswap(int iindex)
+{
+    unsigned      **mem = meminfo();
+    if (mem != NULL)
+        return mem[meminfo_swap][iindex];
+    else
+        return -1;
+}
+#else
+#define pagetok(size) ((size) << pageshift)
+#endif
+
+#define SWAPGETLEFT 0
+#define SWAPGETTOTAL 1
+
+static long
+getswap(int rettype)
+{
+    long            spaceleft = 0, spacetotal = 0;
+
+#if defined(linux)
+    spaceleft = memswap(meminfo_free);
+    spacetotal = memswap(meminfo_total);
+#elif defined(bsdi2)
+    struct swapstats swapst;
+    size_t          size = sizeof(swapst);
+    static int      mib[] = { CTL_VM, VM_SWAPSTATS };
+    if (sysctl(mib, 2, &swapst, &size, NULL, 0) < 0)
+        return (0);
+    spaceleft = swapst.swap_free / 2;
+    spacetotal = swapst.swap_total / 2;
+#elif defined (hpux10) || defined(hpux11)
+    struct pst_swapinfo pst_buf;
+    int ndx = 0;
+    long pgs, pgs_free;
+  
+    while (pstat_getswap(&pst_buf, sizeof(struct pst_swapinfo), 1, ndx) > 0) {
+        if (pst_buf.pss_flags & SW_BLOCK) {
+            pgs = pst_buf.pss_nblksenabled;
+            pgs_free = pst_buf.pss_nblksavail;
+        }
+        else if (pst_buf.pss_flags & SW_FS) {
+            pgs = pst_buf.pss_limit;
+            pgs_free = pgs - pst_buf.pss_allocated - pst_buf.pss_reserve;
+            /*
+             * the following calculation is done this way to avoid integer overflow!
+             * pss_swapchunk is either 512 or a multiple of 1024!
+             */
+            if (pst_buf.pss_swapchunk == 512) {
+                pgs_free /= 2;
+                pgs /= 2;
+            } else {
+                pgs_free *= (pst_buf.pss_swapchunk / 1024);
+                pgs *= (pst_buf.pss_swapchunk / 1024);
+            }
+        }
+        else {
+            pgs = pgs_free = 0;
+        }
+        spaceleft += pgs_free;
+        spacetotal += pgs;
+        ndx = pst_buf.pss_idx + 1;
+    }
+#else /* !linux && !bsdi2 && !hpux10 && !hpux11 */
+    struct swdevt   swdevt[100];
+    struct fswdevt  fswdevt[100];
+    FILE           *file;
+    struct extensible ex;
+    int             i, fd;
+    char           *cp;
+
+    if (auto_nlist
+        (SWDEVT_SYMBOL, (char *) swdevt, sizeof(struct swdevt) * nswapdev)
+        == 0)
+        return (0);
+    DEBUGMSGTL(("ucd-snmp/memory", "%d block swap devices: \n", nswapdev));
+    for (i = 0; i < nswapdev; i++) {
+        DEBUGMSGTL(("ucd-snmp/memory", "swdevt[%d]: %d\n", i,
+                    swdevt[i].sw_enable));
+        if (swdevt[i].sw_enable)
+        {
+#ifdef STRUCT_SWDEVT_HAS_SW_NBLKSENABLED
+            DEBUGMSGTL(("ucd-snmp/memory",
+                        "  swdevt.sw_nblksenabled:     %d\n",
+                        swdevt[i].sw_nblksenabled));
+            spacetotal += swdevt[i].sw_nblksenabled;
+#else
+            DEBUGMSGTL(("ucd-snmp/memory", "  swdevt.sw_nblks:     %d\n",
+                        swdevt[i].sw_nblks));
+            spacetotal += swdevt[i].sw_nblks;
+#endif
+            DEBUGMSGTL(("ucd-snmp/memory", "  swdevt.sw_nfpgs:     %d\n",
+                        swdevt[i].sw_nfpgs));
+            spaceleft += (swdevt[i].sw_nfpgs * 4);
+        }
+    }
+    if (auto_nlist
+        (FSWDEVT_SYMBOL, (char *) fswdevt,
+         sizeof(struct fswdevt) * nswapfs)
+        == 0)
+        return (0);
+    DEBUGMSGTL(("ucd-snmp/memory", "%d fs swap devices: \n", nswapfs));
+    for (i = 0; i < nswapfs; i++) {
+        DEBUGMSGTL(("ucd-snmp/memory", "fswdevt[%d]: %d\n", i,
+                    fswdevt[i].fsw_enable));
+        if (fswdevt[i].fsw_enable)
+        {
+            spacetotal += (fswdevt[i].fsw_limit * 2048);        /* 2048=bytes per page? */
+            spaceleft += (fswdevt[i].fsw_limit * 2048 -
+                          ((fswdevt[i].fsw_allocated -
+                            fswdevt[i].fsw_min) * 37));
+            DEBUGMSGTL(("ucd-snmp/memory",
+                        "  fswdevt[i].fsw_limit:     %d\n",
+                        fswdevt[i].fsw_limit));
+            DEBUGMSGTL(("ucd-snmp/memory",
+                        "  fswdevt[i].fsw_allocated: %d\n",
+                        fswdevt[i].fsw_allocated));
+            DEBUGMSGTL(("ucd-snmp/memory",
+                        "  fswdevt[i].fsw_min:       %d\n",
+                        fswdevt[i].fsw_min));
+            DEBUGMSGTL(("ucd-snmp/memory",
+                        "  fswdevt[i].fsw_reserve:   %d\n",
+                        fswdevt[i].fsw_reserve));
+            /*
+             * 37 = calculated value I know it makes no sense, nor is it accurate 
+             */
+        }
+    }
+    /*
+     * this is a real hack.  I need to get the hold info from swapinfo, but
+     * I can't figure out how to read it out of the kernel directly
+     * -- Wes 
+     */
+    strcpy(ex.command, "/etc/swapinfo -h");
+    if ((fd = get_exec_output(&ex)) != -1) {
+        file = fdopen(fd, "r");
+        for (i = 1;
+             i <= 2 && fgets(ex.output, sizeof(ex.output), file) != NULL;
+             i++);
+        if (fgets(ex.output, sizeof(ex.output), file) != NULL) {
+            cp = skip_white(ex.output); /* not there should be any */
+            cp = skip_not_white(cp);    /* skip over "reserve" */
+            cp = skip_white(cp);
+            cp = skip_not_white(cp);    /* avail swap, a '-' in most cases */
+            cp = skip_white(cp);
+            spaceleft -= atoi(cp);      /* reserved swap */
+        }
+        fclose(file);
+        wait_on_exec(&ex);
+    } else {
+        return (0);
+    }
+#endif                          /* !linux && !bsdi2 && !hpux10 && !hpux11 */
+
+    switch (rettype) {
+    case SWAPGETLEFT:
+        return (spaceleft);
+    case SWAPGETTOTAL:
+        return (spacetotal);
+    }
+    return 0;
+}
+
+static
+unsigned char  *
+var_extensible_mem(struct variable *vp,
+                   oid * name,
+                   size_t * length,
+                   int exact,
+                   size_t * var_len, WriteMethod ** write_method)
+{
+
+    static long     long_ret;
+    static char     errmsg[300];
+#if !defined(linux)
+#if defined(hpux10) || defined(hpux11)
+    struct pst_dynamic pst_buf;
+#elif defined(TOTAL_MEMORY_SYMBOL) || defined(USE_SYSCTL_VM)
+    struct vmtotal total;
+#endif
+#endif
+
+    long_ret = 0;               /* set to 0 as default */
+
+    if (header_generic(vp, name, length, exact, var_len, write_method))
+        return (NULL);
+
+#if !defined(linux)
+#if defined(hpux10) || defined(hpux11)
+    if (pstat_getdynamic(&pst_buf, sizeof(struct pst_dynamic), 1, 0) < 0)
+        return NULL;
+#elif defined(USE_SYSCTL_VM)
+    /*
+     * sum memory statistics 
+     */
+    {
+        size_t          size = sizeof(total);
+        static int      mib[] = { CTL_VM, VM_TOTAL };
+        if (sysctl(mib, 2, &total, &size, NULL, 0) < 0)
+            return NULL;
+    }
+#elif defined(TOTAL_MEMORY_SYMBOL)
+    if (auto_nlist(TOTAL_MEMORY_SYMBOL, (char *) &total, sizeof(total)) ==
+        0)
+        return NULL;
+#endif
+#endif                          /* !linux */
+
+    switch (vp->magic) {
+    case MIBINDEX:
+        long_ret = 0;
+        return ((u_char *) (&long_ret));
+    case ERRORNAME:            /* dummy name */
+        sprintf(errmsg, "swap");
+        *var_len = strlen(errmsg);
+        return ((u_char *) (errmsg));
+    case MEMTOTALSWAP:
+        long_ret = getswap(SWAPGETTOTAL);
+        return ((u_char *) (&long_ret));
+    case MEMAVAILSWAP:
+        long_ret = getswap(SWAPGETLEFT);
+        return ((u_char *) (&long_ret));
+    case MEMSWAPMINIMUM:
+        long_ret = minimumswap;
+        return ((u_char *) (&long_ret));
+    case MEMTOTALREAL:
+#if defined(USE_SYSCTL)
+        {
+            size_t          size = sizeof(long_ret);
+            static int      mib[] = { CTL_HW, HW_PHYSMEM };
+            if (sysctl(mib, 2, &long_ret, &size, NULL, 0) < 0)
+                return NULL;
+            long_ret = long_ret / 1024;
+        }
+#elif defined(hpux10) || defined(hpux11)
+        {
+            struct pst_static pst_buf;
+            if (pstat_getstatic(&pst_buf, sizeof(struct pst_static), 1, 0)
+                < 0)
+                return NULL;
+            long_ret =
+                pst_buf.physical_memory * (pst_buf.page_size / 1024);
+        }
+#elif defined(linux)
+        long_ret = memory(meminfo_total);
+#elif defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE)
+        long_ret =
+            sysconf(_SC_PHYS_PAGES) * (sysconf(_SC_PAGESIZE) / 1024);
+#elif defined(PHYSMEM_SYMBOL)
+        {
+            int             result;
+            if (auto_nlist
+                (PHYSMEM_SYMBOL, (char *) &result, sizeof(result)) == 0)
+                return NULL;
+            long_ret = result * 1000;   /* ??? */
+        }
+#else
+        return NULL;            /* no dummy values */
+#endif
+        return ((u_char *) (&long_ret));
+    case MEMAVAILREAL:
+#ifdef linux
+        long_ret = memory(meminfo_free);
+#elif defined(hpux10) || defined(hpux11)
+        long_ret = pagetok((int) pst_buf.psd_arm);
+#elif defined(TOTAL_MEMORY_SYMBOL) || defined(USE_SYSCTL_VM)
+        long_ret = pagetok((int) total.t_arm);
+#else
+        return NULL;            /* no dummy values */
+#endif
+        return ((u_char *) (&long_ret));
+#ifndef linux
+    case MEMTOTALSWAPTXT:
+#if defined(hpux10) || defined(hpux11)
+        long_ret = pagetok((int) pst_buf.psd_vmtxt);
+#elif !defined(bsdi2)
+        long_ret = pagetok(total.t_vmtxt);
+#else
+        return NULL;            /* no dummy values */
+#endif
+        return ((u_char *) (&long_ret));
+    case MEMUSEDSWAPTXT:
+#if defined(hpux10) || defined(hpux11)
+        long_ret = pagetok((int) pst_buf.psd_avmtxt);
+#elif !defined(bsdi2)
+        long_ret = pagetok(total.t_avmtxt);
+#else
+        return NULL;            /* no dummy values */
+#endif
+        return ((u_char *) (&long_ret));
+    case MEMTOTALREALTXT:
+#if defined(hpux10) || defined(hpux11)
+        long_ret = pagetok((int) pst_buf.psd_rmtxt);
+#elif !defined(bsdi2)
+        long_ret = pagetok(total.t_rmtxt);
+#else
+        return NULL;            /* no dummy values */
+#endif
+        return ((u_char *) (&long_ret));
+    case MEMUSEDREALTXT:
+#if defined(hpux10) || defined(hpux11)
+        long_ret = pagetok((int) pst_buf.psd_armtxt);
+#elif !defined(bsdi2)
+        long_ret = pagetok(total.t_armtxt);
+#else
+        return NULL;            /* no dummy values */
+#endif
+        return ((u_char *) (&long_ret));
+#endif                          /* linux */
+    case MEMTOTALFREE:
+#ifdef linux
+        long_ret = memory(meminfo_free) + memswap(meminfo_free);
+#elif defined(hpux10) || defined(hpux11)
+        long_ret = pagetok((int) pst_buf.psd_free);
+#else
+        long_ret = pagetok(total.t_free);
+#endif
+        return ((u_char *) (&long_ret));
+    case MEMCACHED:
+#ifdef linux
+        long_ret = memory(meminfo_cached);
+#else
+        return NULL;            /* no dummy values */
+#endif
+        return ((u_char *) (&long_ret));
+    case MEMBUFFER:
+#ifdef linux
+        long_ret = memory(meminfo_buffers);
+#else
+        return NULL;            /* no dummy values */
+#endif
+        return ((u_char *) (&long_ret));
+    case MEMSHARED:
+#ifdef linux
+        long_ret = memory(meminfo_shared);
+#else
+        return NULL;            /* no dummy values */
+#endif
+        return ((u_char *) (&long_ret));
+    case ERRORFLAG:
+        long_ret = getswap(SWAPGETLEFT);
+        long_ret = (long_ret > minimumswap) ? 0 : 1;
+        return ((u_char *) (&long_ret));
+    case ERRORMSG:
+        long_ret = getswap(SWAPGETLEFT);
+        if ((long_ret > minimumswap) ? 0 : 1)
+            sprintf(errmsg, "Running out of swap space (%ld)",
+                    getswap(SWAPGETLEFT));
+        else
+            errmsg[0] = 0;
+        *var_len = strlen(errmsg);
+        return ((u_char *) (errmsg));
+    }
+    return NULL;
+}