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net-snmp/agent/mibgroup/ucd-snmp/disk.c

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/*
* disk.c
*/
#include <net-snmp/net-snmp-config.h>
/* workaround for bug in autoconf 2.60b and 2.61 */
#ifdef HAVE_GETMNTENT
#undef HAVE_GETMNTENT
#define HAVE_GETMNTENT 1 /* previously might be only "#define HAVE_GETMNTENT" */
#endif
#include <stdio.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 <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_PARAM_H
#include <sys/param.h>
#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
#if !defined(dragonfly)
#ifdef HAVE_SYS_VNODE_H
#include <sys/vnode.h>
#endif
#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
#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_SYS_STATFS_H
#include <sys/statfs.h>
#endif
#if HAVE_SYS_STATVFS_H
#include <sys/statvfs.h>
#endif
#if HAVE_SYS_VFS_H
#include <sys/vfs.h>
#endif
#if defined(__FreeBSD__) && __FreeBSD_version >= 700055 /* Or HAVE_SYS_UCRED_H */
#include <sys/ucred.h>
#endif
#if defined(HAVE_STATFS)
#if HAVE_SYS_MOUNT_H
#include <sys/mount.h>
#endif
#if HAVE_SYS_SYSCTL_H
#include <sys/sysctl.h>
#endif
#if !defined(HAVE_STATVFS)
#define statvfs statfs
#endif
#endif
#if HAVE_VM_VM_H
#include <vm/vm.h>
#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 HAVE_FSTAB_H
#include <fstab.h>
#endif
#if HAVE_MNTENT_H
#include <mntent.h>
#endif
#if HAVE_SYS_MNTTAB_H
#include <sys/mnttab.h>
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.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
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include <net-snmp/agent/auto_nlist.h>
#include "struct.h"
#include "disk.h"
#include "util_funcs/header_simple_table.h"
#if USING_UCD_SNMP_ERRORMIB_MODULE
#include "errormib.h"
#else
#define setPerrorstatus(x) snmp_log_perror(x)
#endif
/*
* * config file parsing routines
* */
static void disk_free_config(void);
static void disk_parse_config(const char *, char *);
static void disk_parse_config_all(const char *, char *);
#if HAVE_FSTAB_H || HAVE_GETMNTENT || HAVE_STATFS
static void find_and_add_allDisks(int minpercent);
static void add_device(char *path, char *device,
int minspace, int minpercent, int override);
static void modify_disk_parameters(int index, int minspace,
int minpercent);
static int disk_exists(char *path);
static char *find_device(char *path);
#endif
struct diskpart {
char device[STRMAX];
char path[STRMAX];
int minimumspace;
int minpercent;
};
#define MAX_INT_32 0x7fffffff
#define MAX_UINT_32 0xffffffff
unsigned int numdisks;
int allDisksIncluded = 0;
unsigned int maxdisks = 0;
struct diskpart *disks;
struct variable2 extensible_disk_variables[] = {
{MIBINDEX, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {MIBINDEX}},
{ERRORNAME, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {ERRORNAME}},
{DISKDEVICE, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {DISKDEVICE}},
{DISKMINIMUM, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {DISKMINIMUM}},
{DISKMINPERCENT, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {DISKMINPERCENT}},
{DISKTOTAL, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {DISKTOTAL}},
{DISKAVAIL, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {DISKAVAIL}},
{DISKUSED, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {DISKUSED}},
{DISKPERCENT, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {DISKPERCENT}},
{DISKPERCENTNODE, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {DISKPERCENTNODE}},
{ERRORFLAG, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {ERRORFLAG}},
{ERRORMSG, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {ERRORMSG}},
{DISKTOTALLOW, ASN_UNSIGNED, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {DISKTOTALLOW}},
{DISKTOTALHIGH, ASN_UNSIGNED, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {DISKTOTALHIGH}},
{DISKAVAILLOW, ASN_UNSIGNED, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {DISKAVAILLOW}},
{DISKAVAILHIGH, ASN_UNSIGNED, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {DISKAVAILHIGH}},
{DISKUSEDLOW, ASN_UNSIGNED, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {DISKUSEDLOW}},
{DISKUSEDHIGH, ASN_UNSIGNED, NETSNMP_OLDAPI_RONLY,
var_extensible_disk, 1, {DISKUSEDHIGH}},
};
/*
* Define the OID pointer to the top of the mib tree that we're
* registering underneath
*/
oid disk_variables_oid[] = { NETSNMP_UCDAVIS_MIB, NETSNMP_DISKMIBNUM, 1 };
void
init_disk(void)
{
/*
* register ourselves with the agent to handle our mib tree
*/
REGISTER_MIB("ucd-snmp/disk", extensible_disk_variables, variable2,
disk_variables_oid);
snmpd_register_config_handler("disk", disk_parse_config,
disk_free_config,
"path [ minspace | minpercent% ]");
snmpd_register_config_handler("includeAllDisks", disk_parse_config_all,
disk_free_config,
"minpercent%");
allDisksIncluded = 0;
}
static void
disk_free_config(void)
{
unsigned int i;
numdisks = 0;
for (i = 0; i < maxdisks; i++) { /* init/erase disk db */
disks[i].device[0] = 0;
disks[i].path[0] = 0;
disks[i].minimumspace = -1;
disks[i].minpercent = -1;
}
allDisksIncluded = 0;
}
static void
disk_parse_config(const char *token, char *cptr)
{
#if HAVE_FSTAB_H || HAVE_GETMNTENT || HAVE_STATFS
char path[STRMAX];
int minpercent;
int minspace;
if (numdisks == maxdisks) {
if (maxdisks == 0) {
maxdisks = 50;
disks = (struct diskpart *)malloc(maxdisks * sizeof(struct diskpart));
if (!disks) {
config_perror("malloc failed for new disk allocation.");
netsnmp_config_error("\tignoring: %s", cptr);
return;
}
memset(disks, 0, maxdisks * sizeof(struct diskpart));
} else {
maxdisks *= 2;
disks = (struct diskpart *)realloc(disks, maxdisks * sizeof(struct diskpart));
if (!disks) {
config_perror("malloc failed for new disk allocation.");
netsnmp_config_error("\tignoring: %s", cptr);
return;
}
memset(disks + maxdisks/2, 0, maxdisks/2 * sizeof(struct diskpart));
}
}
/*
* read disk path (eg, /1 or /usr)
*/
copy_nword(cptr, path, sizeof(path));
cptr = skip_not_white(cptr);
cptr = skip_white(cptr);
/*
* read optional minimum disk usage spec
*/
if(cptr != NULL) {
if(strchr(cptr, '%') == NULL) {
minspace = atoi(cptr);
minpercent = -1;
}
else {
minspace = -1;
minpercent = atoi(cptr);
}
} else {
minspace = NETSNMP_DEFDISKMINIMUMSPACE;
minpercent = -1;
}
/*
* check if the disk already exists, if so then modify its
* parameters. if it does not exist then add it
*/
add_device(path, find_device(path), minspace, minpercent, 1);
#endif /* HAVE_FSTAB_H || HAVE_GETMNTENT || HAVE_STATFS */
}
static void
disk_parse_config_all(const char *token, char *cptr)
{
#if HAVE_FSTAB_H || HAVE_GETMNTENT || HAVE_STATFS
int minpercent = DISKMINPERCENT;
if (numdisks == maxdisks) {
if (maxdisks == 0) {
maxdisks = 50;
disks = (struct diskpart *)malloc(maxdisks * sizeof(struct diskpart));
if (!disks) {
config_perror("malloc failed for new disk allocation.");
netsnmp_config_error("\tignoring: %s", cptr);
return;
}
memset(disks, 0, maxdisks * sizeof(struct diskpart));
} else {
maxdisks *= 2;
disks = (struct diskpart *)realloc(disks, maxdisks * sizeof(struct diskpart));
if (!disks) {
config_perror("malloc failed for new disk allocation.");
netsnmp_config_error("\tignoring: %s", cptr);
return;
}
memset(disks + maxdisks/2, 0, maxdisks/2 * sizeof(struct diskpart));
}
}
/*
* read the minimum disk usage percent
*/
if(cptr != NULL) {
if(strchr(cptr, '%') != NULL) {
minpercent = atoi(cptr);
}
}
/*
* if we have already seen the "includeAllDisks" directive
* then search for the disk in the "disks" array and modify
* the values. if we havent seen the "includeAllDisks"
* directive then include this disk
*/
if(allDisksIncluded) {
config_perror("includeAllDisks already specified.");
netsnmp_config_error("\tignoring: includeAllDisks %s", cptr);
}
else {
allDisksIncluded = 1;
find_and_add_allDisks(minpercent);
}
#endif /* HAVE_FSTAB_H || HAVE_GETMNTENT || HAVE_STATFS */
}
#if HAVE_FSTAB_H || HAVE_GETMNTENT || HAVE_STATFS
static void
add_device(char *path, char *device, int minspace, int minpercent, int override)
{
int index;
if (!path || !strcmp(path, "none")) {
DEBUGMSGTL(("ucd-snmp/disk", "Skipping null path device (%s)\n", device));
return;
}
if (numdisks == maxdisks) {
if (maxdisks == 0) {
maxdisks = 50;
disks = (struct diskpart *)malloc(maxdisks * sizeof(struct diskpart));
if (!disks) {
netsnmp_config_error("\tignoring: %s", device);
return;
}
memset(disks, 0, maxdisks * sizeof(struct diskpart));
} else {
maxdisks *= 2;
disks = (struct diskpart *)realloc(disks, maxdisks * sizeof(struct diskpart));
if (!disks) {
config_perror("malloc failed for new disk allocation.");
netsnmp_config_error("\tignoring: %s", device);
return;
}
memset(disks + maxdisks/2, 0, maxdisks/2 * sizeof(struct diskpart));
}
}
index = disk_exists(path);
if((index != -1) && (index < maxdisks) && (override==1)) {
modify_disk_parameters(index, minspace, minpercent);
}
else if(index == -1){
/* add if and only if the device was found */
if(device[0] != 0) {
/* The following buffers are cleared above, no need to add '\0' */
strlcpy(disks[numdisks].path, path, sizeof(disks[numdisks].path));
strlcpy(disks[numdisks].device, device, sizeof(disks[numdisks].device));
disks[numdisks].minimumspace = minspace;
disks[numdisks].minpercent = minpercent;
numdisks++;
}
else {
disks[numdisks].minimumspace = -1;
disks[numdisks].minpercent = -1;
disks[numdisks].path[0] = 0;
disks[numdisks].device[0] = 0;
}
}
}
void
modify_disk_parameters(int index, int minspace, int minpercent)
{
disks[index].minimumspace = minspace;
disks[index].minpercent = minpercent;
}
int disk_exists(char *path)
{
unsigned int index;
for(index = 0; index < numdisks; index++) {
DEBUGMSGTL(("ucd-snmp/disk", "Checking for %s. Found %s at %d\n", path, disks[index].path, index));
if(strcmp(path, disks[index].path) == 0) {
return index;
}
}
return -1;
}
static void
find_and_add_allDisks(int minpercent)
{
#if HAVE_GETMNTENT
#if HAVE_SYS_MNTTAB_H
struct mnttab mnttab;
#else
struct mntent *mntent;
#endif
FILE *mntfp;
#elif HAVE_FSTAB_H
struct fstab *fstab1;
#elif HAVE_STATFS
struct statfs statf;
#endif
#if defined(HAVE_GETMNTENT) && !defined(HAVE_SETMNTENT)
int i;
#endif
#if defined(HAVE_GETMNTENT) || defined(HAVE_FSTAB_H)
int dummy = 0;
#endif
/*
* find the device for the path and copy the device into the
* string declared above and at the end of the routine return it
* to the caller
*/
#if HAVE_FSTAB_H || HAVE_GETMNTENT || HAVE_STATFS
#if HAVE_GETMNTENT
#if HAVE_SETMNTENT
mntfp = setmntent(ETC_MNTTAB, "r");
if (!mntfp) {
netsnmp_config_error("Can't open %s (setmntent)\n", ETC_MNTTAB);
return;
}
while (mntfp && NULL != (mntent = getmntent(mntfp))) {
add_device(mntent->mnt_dir, mntent->mnt_fsname, -1, minpercent, 0);
dummy = 1;
}
if (mntfp)
endmntent(mntfp);
if(dummy != 0) {
/*
* dummy clause for else below
*/
}
#else /* getmentent but not setmntent */
mntfp = fopen(ETC_MNTTAB, "r");
if (!mntfp) {
netsnmp_config_error("Can't open %s (fopen)\n", ETC_MNTTAB);
return;
}
while ((i = getmntent(mntfp, &mnttab)) == 0) {
add_device(mnttab.mnt_mountp, mnttab.mnt_special, -1, minpercent, 0);
dummy = 1;
}
fclose(mntfp);
if(dummy != 0) {
/*
* dummy clause for else below
*/
}
#endif /* HAVE_SETMNTENT */
#elif HAVE_FSTAB_H
setfsent(); /* open /etc/fstab */
while((fstab1 = getfsent()) != NULL) {
add_device(fstab1->fs_file, fstab1->fs_spec, -1, minpercent, 0);
dummy = 1;
}
endfsent(); /* close /etc/fstab */
#if defined(__FreeBSD__) && __FreeBSD_version >= 700055
{
struct statfs *mntbuf;
size_t i, mntsize;
mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
for (i = 0; i < mntsize; i++) {
if (strncmp(mntbuf[i].f_fstypename, "zfs", 3) == 0) {
add_device(mntbuf[i].f_mntonname, mntbuf[i].f_mntfromname, -1, minpercent, 0);
}
}
}
#endif
if(dummy != 0) {
/*
* dummy clause for else below
*/
}
#elif HAVE_STATFS
/*
* since there is no way to get all the mounted systems with just
* statfs we default to the root partition "/"
*/
if (statfs("/", &statf) == 0) {
add_device("/", statf.f_mntfromname, -1, minpercent, 0);
}
#endif
else {
if (numdisks == maxdisks) {
return;
}
netsnmp_config_warn("Couldn't find device for disk %s",
disks[numdisks].path);
disks[numdisks].minimumspace = -1;
disks[numdisks].minpercent = -1;
disks[numdisks].path[0] = 0;
}
#else
config_perror("'disk' checks not supported on this architecture.");
#endif /* HAVE_FSTAB_H || HAVE_GETMNTENT || HAVE_STATFS */
}
static char *
find_device(char *path)
{
#if HAVE_GETMNTENT
#if HAVE_SYS_MNTTAB_H
struct mnttab mnttab;
#else
struct mntent *mntent;
#endif
FILE *mntfp;
#elif HAVE_FSTAB_H
struct fstab *fstab;
#elif HAVE_STATFS
struct statfs statf;
#endif
static char device[STRMAX];
#if defined(HAVE_GETMNTENT) && !defined(HAVE_SETMNTENT)
int i;
#endif
device[0] = '\0'; /* null terminate the device */
/* find the device for the path and copy the device into the
* string declared above and at the end of the routine return it
* to the caller
*/
#if HAVE_FSTAB_H || HAVE_GETMNTENT || HAVE_STATFS
#if HAVE_GETMNTENT
#if HAVE_SETMNTENT
mntfp = setmntent(ETC_MNTTAB, "r");
if (!mntfp) {
netsnmp_config_error("Can't open %s (setmntent)\n", ETC_MNTTAB);
return NULL;
}
while (mntfp && NULL != (mntent = getmntent(mntfp)))
if (strcmp(path, mntent->mnt_dir) == 0) {
strlcpy(device, mntent->mnt_fsname, sizeof(device));
DEBUGMSGTL(("ucd-snmp/disk", "Disk: %s\n",
mntent->mnt_fsname));
break;
} else {
DEBUGMSGTL(("ucd-snmp/disk", " %s != %s\n",
path, mntent->mnt_dir));
}
if (mntfp)
endmntent(mntfp);
#else /* getmentent but not setmntent */
mntfp = fopen(ETC_MNTTAB, "r");
if (!mntfp) {
netsnmp_config_error("Can't open %s (fopen)\n", ETC_MNTTAB);
return NULL;
}
while ((i = getmntent(mntfp, &mnttab)) == 0)
if (strcmp(path, mnttab.mnt_mountp) == 0)
break;
else {
DEBUGMSGTL(("ucd-snmp/disk", " %s != %s\n",
path, mnttab.mnt_mountp));
}
fclose(mntfp);
if (i == 0)
strlcpy(device, mnttab.mnt_special, sizeof(device));
#endif /* HAVE_SETMNTENT */
#elif HAVE_FSTAB_H
setfsent();
if ((fstab = getfsfile(path)))
strlcpy(device, fstab->fs_spec, sizeof(device));
endfsent();
if (device[0] != '\0') {
/*
* dummy clause for else below
*/
}
#elif HAVE_STATFS
if (statfs(path, &statf) == 0) {
strlcpy(device, statf.f_mntfromname, sizeof(device));
DEBUGMSGTL(("ucd-snmp/disk", "Disk: %s\n",
statf.f_mntfromname));
}
#endif
else {
netsnmp_config_warn("Couldn't find device for disk %s", path);
}
#else
config_perror("'disk' checks not supported on this architecture.");
#endif /* HAVE_FSTAB_H || HAVE_GETMNTENT || HAVE_STATFS */
return device;
}
#endif
/*
* Part of UCD-SNMP-MIB::dskEntry, which is so hard to fill
* (i.e. platform dependent parts).
*/
struct dsk_entry {
unsigned long long dskTotal;
unsigned long long dskUsed;
unsigned long long dskAvail;
unsigned long dskPercent;
unsigned long dskPercentInode;
unsigned long dskErrorFlag;
};
/**
* Fill in the provided dsk_entry structure.
* Returns -1 on error, 0 on success.
*/
static int
fill_dsk_entry(int disknum, struct dsk_entry *entry)
{
#if defined(HAVE_STATVFS) || defined(HAVE_STATFS)
float multiplier;
#endif
#if defined(HAVE_FSTAB_H) && !defined(HAVE_SYS_STATVFS_H) && !defined(HAVE_STATFS)
double totalblks, free, used, avail, availblks;
#endif
#if defined(HAVE_STATVFS) || defined(HAVE_STATFS)
#ifdef STAT_STATFS_FS_DATA
struct fs_data fsd;
struct {
u_int f_blocks, f_bfree, f_bavail, f_bsize;
} vfs;
#else
struct statvfs vfs;
#endif
#else
#if HAVE_FSTAB_H
int file;
union {
struct fs iu_fs;
char dummy[SBSIZE];
} sb;
#define filesys sb.iu_fs
#endif
#endif
entry->dskPercentInode = -1;
#if defined(HAVE_STATVFS) || defined(HAVE_STATFS)
#ifdef STAT_STATFS_FS_DATA
if (statvfs(disks[disknum].path, &fsd) == -1)
#else
if (statvfs(disks[disknum].path, &vfs) == -1)
#endif
{
snmp_log(LOG_ERR, "Couldn't open device %s\n",
disks[disknum].device);
setPerrorstatus("statvfs dev/disk");
return -1;
}
#ifdef STAT_STATFS_FS_DATA
vfs.f_blocks = fsd.fd_btot;
vfs.f_bfree = fsd.fd_bfree;
vfs.f_bavail = fsd.fd_bfreen;
vfs.f_bsize = 1024; /* Ultrix f_bsize is a VM parameter apparently. */
#endif
#if defined(HAVE_ODS)
vfs.f_blocks = vfs.f_spare[0];
vfs.f_bfree = vfs.f_spare[1];
vfs.f_bavail = vfs.f_spare[2];
#endif
multiplier = (float)vfs.f_bsize / (float)1024.0;
#ifdef HAVE_STRUCT_STATVFS_F_FRSIZE
if (vfs.f_frsize > 255)
multiplier = (float)vfs.f_frsize / (float)1024.0;
#endif
entry->dskTotal = (unsigned long long)(vfs.f_blocks * multiplier);
entry->dskAvail = (unsigned long long)(vfs.f_bavail * multiplier);
entry->dskUsed = (unsigned long long)((vfs.f_blocks - vfs.f_bfree) * multiplier);
entry->dskPercent =
vfs.f_blocks == 0 ? 0 :
vfs.f_bavail <= 0 ? 100 :
(int) ((double) (vfs.f_blocks - vfs.f_bfree) /
(double) (vfs.f_blocks -
(vfs.f_bfree - vfs.f_bavail)) * 100.0 + 0.5);
#if defined(HAVE_STRUCT_STATVFS_F_FILES) || defined HAVE_STRUCT_STATFS_F_FAVAIL
entry->dskPercentInode = vfs.f_favail <= 0 ? 100 :
(int) ((double) (vfs.f_files - vfs.f_ffree) /
(double) (vfs.f_files -
(vfs.f_ffree - vfs.f_favail)) * 100.0 + 0.5);
#else
#if defined(HAVE_STRUCT_STATFS_F_FILES) && defined(HAVE_STRUCT_STATFS_F_FFREE)
entry->dskPercentInode = vfs.f_files == 0 ? 100.0 :
(int) ((double) (vfs.f_files - vfs.f_ffree) /
(double) (vfs.f_files) * 100.0 + 0.5);
#endif
#endif /* defined(HAVE_STRUCT_STATVFS_F_FILES) */
#elif HAVE_FSTAB_H
/*
* read the disk information
*/
if ((file = open(disks[disknum].device, 0)) < 0) {
snmp_log(LOG_ERR, "Couldn't open device %s\n",
disks[disknum].device);
setPerrorstatus("open dev/disk");
return -1;
}
lseek(file, (long) (SBLOCK * DEV_BSIZE), 0);
if (read(file, (char *) &filesys, SBSIZE) != SBSIZE) {
setPerrorstatus("open dev/disk");
snmp_log(LOG_ERR, "Error reading device %s\n",
disks[disknum].device);
close(file);
return -1;
}
close(file);
totalblks = filesys.fs_dsize;
free = filesys.fs_cstotal.cs_nbfree * filesys.fs_frag +
filesys.fs_cstotal.cs_nffree;
used = totalblks - free;
availblks = totalblks * (100 - filesys.fs_minfree) / 100;
avail = availblks > used ? availblks - used : 0;
entry->dskPercent =
totalblks == 0 ? 0 :
availblks == 0 ? 100 :
(int) ((double) used / (double) totalblks * 100.0 + 0.5);
multiplier = (float)filesys.fs_fsize / (float)1024.0;
entry->dskTotal = (unsigned long long)(totalblks * multiplier);
entry->dskAvail = (unsigned long long)(avail * multiplier);
entry->dskUsed = (unsigned long long)(used * multiplier);
#else
/* MinGW */
entry->dskPercent = 0;
entry->dskTotal = 0;
entry->dskAvail = 0;
entry->dskUsed = 0;
#endif
entry->dskErrorFlag =
(disks[disknum].minimumspace >= 0
? entry->dskAvail < (unsigned long long)disks[disknum].minimumspace
: 100 - entry->dskPercent <= (unsigned int)disks[disknum].minpercent) ? 1 : 0;
return 0;
}
/*
* var_extensible_disk(...
* Arguments:
* vp IN - pointer to variable entry that points here
* name IN/OUT - IN/name requested, OUT/name found
* length IN/OUT - length of IN/OUT oid's
* exact IN - TRUE if an exact match was requested
* var_len OUT - length of variable or 0 if function returned
* write_method
*
*/
u_char *
var_extensible_disk(struct variable *vp,
oid * name,
size_t * length,
int exact,
size_t * var_len, WriteMethod ** write_method)
{
int ret;
unsigned int disknum = 0;
struct dsk_entry entry;
static long long_ret;
static char *errmsg;
tryAgain:
if (header_simple_table
(vp, name, length, exact, var_len, write_method, numdisks))
return (NULL);
disknum = name[*length - 1] - 1;
if (disknum > maxdisks)
return NULL;
switch (vp->magic) {
case MIBINDEX:
long_ret = disknum + 1;
return ((u_char *) (&long_ret));
case ERRORNAME: /* DISKPATH */
*var_len = strlen(disks[disknum].path);
return ((u_char *) disks[disknum].path);
case DISKDEVICE:
*var_len = strlen(disks[disknum].device);
return ((u_char *) disks[disknum].device);
case DISKMINIMUM:
long_ret = disks[disknum].minimumspace;
return ((u_char *) (&long_ret));
case DISKMINPERCENT:
long_ret = disks[disknum].minpercent;
return ((u_char *) (&long_ret));
}
ret = fill_dsk_entry(disknum, &entry);
if (ret < 0) {
if (!exact)
goto tryAgain;
return NULL;
}
switch (vp->magic) {
case DISKTOTAL:
if (entry.dskTotal > MAX_INT_32)
long_ret = MAX_INT_32;
else
long_ret = (long)(entry.dskTotal);
return ((u_char *) (&long_ret));
case DISKTOTALLOW:
long_ret = entry.dskTotal & MAX_UINT_32;
return ((u_char *) (&long_ret));
case DISKTOTALHIGH:
long_ret = entry.dskTotal >> 32;
return ((u_char *) (&long_ret));
case DISKAVAIL:
if (entry.dskAvail > MAX_INT_32)
long_ret = MAX_INT_32;
else
long_ret = (long)(entry.dskAvail);
return ((u_char *) (&long_ret));
case DISKAVAILLOW:
long_ret = entry.dskAvail & MAX_UINT_32;
return ((u_char *) (&long_ret));
case DISKAVAILHIGH:
long_ret = entry.dskAvail >> 32;
return ((u_char *) (&long_ret));
case DISKUSED:
if (entry.dskUsed > MAX_INT_32)
long_ret = MAX_INT_32;
else
long_ret = (long)(entry.dskUsed);
return ((u_char *) (&long_ret));
case DISKUSEDLOW:
long_ret = entry.dskUsed & MAX_UINT_32;
return ((u_char *) (&long_ret));
case DISKUSEDHIGH:
long_ret = entry.dskUsed >> 32;
return ((u_char *) (&long_ret));
case DISKPERCENT:
long_ret = entry.dskPercent;
return ((u_char *) (&long_ret));
case DISKPERCENTNODE:
long_ret = entry.dskPercentInode;
return ((u_char *) (&long_ret));
case ERRORFLAG:
long_ret = entry.dskErrorFlag;
return ((u_char *) (&long_ret));
case ERRORMSG:
free(errmsg);
errmsg = NULL;
*var_len = 0;
if (entry.dskErrorFlag) {
if ((disks[disknum].minimumspace >= 0 &&
asprintf(&errmsg, "%s: less than %d free (= %d)",
disks[disknum].path, disks[disknum].minimumspace,
(int) entry.dskAvail) >= 0) ||
(disks[disknum].minimumspace < 0 &&
asprintf(&errmsg, "%s: less than %d%% free (= %d%%)",
disks[disknum].path, disks[disknum].minpercent,
(int)entry.dskPercent) >= 0)) {
*var_len = strlen(errmsg);
}
}
return (u_char *) (errmsg);
}
return NULL;
}
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