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/*
** Zabbix
** Copyright (C) 2001-2014 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
#include "common.h"
#include "sysinfo.h"
#include "zbxregexp.h"
#include "log.h"
static int get_cmdline(FILE *f_cmd, char **line, size_t *line_offset)
{
size_t line_alloc = ZBX_KIBIBYTE, n;
rewind(f_cmd);
*line = zbx_malloc(*line, line_alloc + 2);
*line_offset = 0;
while (0 != (n = fread(*line + *line_offset, 1, line_alloc - *line_offset, f_cmd)))
{
*line_offset += n;
if (0 != feof(f_cmd))
break;
line_alloc *= 2;
*line = zbx_realloc(*line, line_alloc + 2);
}
if (0 == ferror(f_cmd))
{
if (0 == *line_offset || '\0' != (*line)[*line_offset - 1])
(*line)[(*line_offset)++] = '\0';
if (1 == *line_offset || '\0' != (*line)[*line_offset - 2])
(*line)[(*line_offset)++] = '\0';
return SUCCEED;
}
zbx_free(*line);
return FAIL;
}
static int cmp_status(FILE *f_stat, const char *procname)
{
char tmp[MAX_STRING_LEN];
rewind(f_stat);
while (NULL != fgets(tmp, sizeof(tmp), f_stat))
{
if (0 != strncmp(tmp, "Name:\t", 6))
continue;
zbx_rtrim(tmp + 6, "\n");
if (0 == strcmp(tmp + 6, procname))
return SUCCEED;
break;
}
return FAIL;
}
static int check_procname(FILE *f_cmd, FILE *f_stat, const char *procname)
{
char *tmp = NULL, *p;
size_t l;
int ret = SUCCEED;
if (NULL == procname || '\0' == *procname)
return SUCCEED;
/* process name in /proc/[pid]/status contains limited number of characters */
if (SUCCEED == cmp_status(f_stat, procname))
return SUCCEED;
if (SUCCEED == get_cmdline(f_cmd, &tmp, &l))
{
if (NULL == (p = strrchr(tmp, '/')))
p = tmp;
else
p++;
if (0 == strcmp(p, procname))
goto clean;
}
ret = FAIL;
clean:
zbx_free(tmp);
return ret;
}
static int check_user(FILE *f_stat, struct passwd *usrinfo)
{
char tmp[MAX_STRING_LEN], *p, *p1;
uid_t uid;
if (NULL == usrinfo)
return SUCCEED;
rewind(f_stat);
while (NULL != fgets(tmp, sizeof(tmp), f_stat))
{
if (0 != strncmp(tmp, "Uid:\t", 5))
continue;
p = tmp + 5;
if (NULL != (p1 = strchr(p, '\t')))
*p1 = '\0';
uid = (uid_t)atoi(p);
if (usrinfo->pw_uid == uid)
return SUCCEED;
break;
}
return FAIL;
}
static int check_proccomm(FILE *f_cmd, const char *proccomm)
{
char *tmp = NULL;
size_t i, l;
int ret = SUCCEED;
if (NULL == proccomm || '\0' == *proccomm)
return SUCCEED;
if (SUCCEED == get_cmdline(f_cmd, &tmp, &l))
{
for (i = 0, l -= 2; i < l; i++)
if ('\0' == tmp[i])
tmp[i] = ' ';
if (NULL != zbx_regexp_match(tmp, proccomm, NULL))
goto clean;
}
ret = FAIL;
clean:
zbx_free(tmp);
return ret;
}
static int check_procstate(FILE *f_stat, int zbx_proc_stat)
{
char tmp[MAX_STRING_LEN], *p;
if (ZBX_PROC_STAT_ALL == zbx_proc_stat)
return SUCCEED;
rewind(f_stat);
while (NULL != fgets(tmp, sizeof(tmp), f_stat))
{
if (0 != strncmp(tmp, "State:\t", 7))
continue;
p = tmp + 7;
switch (zbx_proc_stat)
{
case ZBX_PROC_STAT_RUN:
return ('R' == *p) ? SUCCEED : FAIL;
case ZBX_PROC_STAT_SLEEP:
return ('S' == *p) ? SUCCEED : FAIL;
case ZBX_PROC_STAT_ZOMB:
return ('Z' == *p) ? SUCCEED : FAIL;
default:
return FAIL;
}
}
return FAIL;
}
int PROC_MEM(AGENT_REQUEST *request, AGENT_RESULT *result)
{
char tmp[MAX_STRING_LEN], *p, *p1, *procname, *proccomm, *param;
DIR *dir;
struct dirent *entries;
struct passwd *usrinfo;
FILE *f_cmd = NULL, *f_stat = NULL;
zbx_uint64_t value = 0;
int do_task, proccount = 0;
double memsize = 0;
if (4 < request->nparam)
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Too many parameters."));
return SYSINFO_RET_FAIL;
}
procname = get_rparam(request, 0);
param = get_rparam(request, 1);
if (NULL != param && '\0' != *param)
{
errno = 0;
if (NULL == (usrinfo = getpwnam(param)))
{
if (0 == errno)
SET_MSG_RESULT(result, zbx_strdup(NULL, "Specified user does not exist."));
else
SET_MSG_RESULT(result, zbx_dsprintf(NULL, "Cannot obtain user information: %s",
zbx_strerror(errno)));
return SYSINFO_RET_FAIL;
}
}
else
usrinfo = NULL;
param = get_rparam(request, 2);
if (NULL == param || '\0' == *param || 0 == strcmp(param, "sum"))
do_task = ZBX_DO_SUM;
else if (0 == strcmp(param, "avg"))
do_task = ZBX_DO_AVG;
else if (0 == strcmp(param, "max"))
do_task = ZBX_DO_MAX;
else if (0 == strcmp(param, "min"))
do_task = ZBX_DO_MIN;
else
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid third parameter."));
return SYSINFO_RET_FAIL;
}
proccomm = get_rparam(request, 3);
if (NULL == (dir = opendir("/proc")))
{
SET_MSG_RESULT(result, zbx_dsprintf(NULL, "Cannot open /proc: %s", zbx_strerror(errno)));
return SYSINFO_RET_FAIL;
}
while (NULL != (entries = readdir(dir)))
{
zbx_fclose(f_cmd);
zbx_fclose(f_stat);
if (0 == strcmp(entries->d_name, "self"))
continue;
zbx_snprintf(tmp, sizeof(tmp), "/proc/%s/cmdline", entries->d_name);
if (NULL == (f_cmd = fopen(tmp, "r")))
continue;
zbx_snprintf(tmp, sizeof(tmp), "/proc/%s/status", entries->d_name);
if (NULL == (f_stat = fopen(tmp, "r")))
continue;
if (FAIL == check_procname(f_cmd, f_stat, procname))
continue;
if (FAIL == check_user(f_stat, usrinfo))
continue;
if (FAIL == check_proccomm(f_cmd, proccomm))
continue;
rewind(f_stat);
while (NULL != fgets(tmp, sizeof(tmp), f_stat))
{
if (0 != strncmp(tmp, "VmSize:\t", 8))
continue;
p = tmp + 8;
if (NULL == (p1 = strrchr(p, ' ')))
continue;
*p1++ = '\0';
sscanf(p, ZBX_FS_UI64, &value);
zbx_rtrim(p1, "\n");
if (0 == strcasecmp(p1, "kB"))
value <<= 10;
else if (0 == strcasecmp(p1, "mB"))
value <<= 20;
else if (0 == strcasecmp(p1, "GB"))
value <<= 30;
else if (0 == strcasecmp(p1, "TB"))
value <<= 40;
if (0 == proccount++)
memsize = value;
else
{
if (ZBX_DO_MAX == do_task)
memsize = MAX(memsize, value);
else if (ZBX_DO_MIN == do_task)
memsize = MIN(memsize, value);
else
memsize += value;
}
break;
}
}
zbx_fclose(f_cmd);
zbx_fclose(f_stat);
closedir(dir);
if (ZBX_DO_AVG == do_task)
SET_DBL_RESULT(result, proccount == 0 ? 0 : memsize / proccount);
else
SET_UI64_RESULT(result, memsize);
return SYSINFO_RET_OK;
}
int PROC_NUM(AGENT_REQUEST *request, AGENT_RESULT *result)
{
char tmp[MAX_STRING_LEN], *procname, *proccomm, *param;
DIR *dir;
struct dirent *entries;
struct passwd *usrinfo;
FILE *f_cmd = NULL, *f_stat = NULL;
int zbx_proc_stat;
zbx_uint64_t proccount = 0;
if (4 < request->nparam)
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Too many parameters."));
return SYSINFO_RET_FAIL;
}
procname = get_rparam(request, 0);
param = get_rparam(request, 1);
if (NULL != param && '\0' != *param)
{
errno = 0;
if (NULL == (usrinfo = getpwnam(param)))
{
if (0 == errno)
SET_MSG_RESULT(result, zbx_strdup(NULL, "Specified user does not exist."));
else
SET_MSG_RESULT(result, zbx_dsprintf(NULL, "Cannot obtain user information: %s",
zbx_strerror(errno)));
return SYSINFO_RET_FAIL;
}
}
else
usrinfo = NULL;
param = get_rparam(request, 2);
if (NULL == param || '\0' == *param || 0 == strcmp(param, "all"))
zbx_proc_stat = ZBX_PROC_STAT_ALL;
else if (0 == strcmp(param, "run"))
zbx_proc_stat = ZBX_PROC_STAT_RUN;
else if (0 == strcmp(param, "sleep"))
zbx_proc_stat = ZBX_PROC_STAT_SLEEP;
else if (0 == strcmp(param, "zomb"))
zbx_proc_stat = ZBX_PROC_STAT_ZOMB;
else
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid third parameter."));
return SYSINFO_RET_FAIL;
}
proccomm = get_rparam(request, 3);
if (NULL == (dir = opendir("/proc")))
{
SET_MSG_RESULT(result, zbx_dsprintf(NULL, "Cannot open /proc: %s", zbx_strerror(errno)));
return SYSINFO_RET_FAIL;
}
while (NULL != (entries = readdir(dir)))
{
zbx_fclose(f_cmd);
zbx_fclose(f_stat);
if (0 == strcmp(entries->d_name, "self"))
continue;
zbx_snprintf(tmp, sizeof(tmp), "/proc/%s/cmdline", entries->d_name);
if (NULL == (f_cmd = fopen(tmp, "r")))
continue;
zbx_snprintf(tmp, sizeof(tmp), "/proc/%s/status", entries->d_name);
if (NULL == (f_stat = fopen(tmp, "r")))
continue;
if (FAIL == check_procname(f_cmd, f_stat, procname))
continue;
if (FAIL == check_user(f_stat, usrinfo))
continue;
if (FAIL == check_proccomm(f_cmd, proccomm))
continue;
if (FAIL == check_procstate(f_stat, zbx_proc_stat))
continue;
proccount++;
}
zbx_fclose(f_cmd);
zbx_fclose(f_stat);
closedir(dir);
SET_UI64_RESULT(result, proccount);
return SYSINFO_RET_OK;
}
|