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sigar/src/sigar_ptql.c

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/*
* Copyright (C) [2004, 2005, 2006], Hyperic, Inc.
* This file is part of SIGAR.
*
* SIGAR is free software; you can redistribute it and/or modify
* it under the terms version 2 of the GNU General Public License as
* published by the Free Software Foundation. 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*/
#include "sigar.h"
#include "sigar_private.h"
#include "sigar_util.h"
#include "sigar_ptql.h"
#include "sigar_os.h"
#include <stdio.h>
#ifdef SIGAR_HAS_PCRE
#include "pcre.h"
#endif
/* See http://gcc.gnu.org/ml/libstdc++/2002-03/msg00164.html */
#if defined(WIN32) || (defined(__hpux) && defined(SIGAR_64BIT))
#define strtoull strtoul
#elif (defined(__hpux) && !defined(SIGAR_64BIT))
#define strtoull __strtoull
#else
#include <errno.h>
#endif
#define strtonum_failed(src, ptr) \
((src == ptr) || (errno == ERANGE) || (*ptr != '\0'))
typedef struct ptql_parse_branch_t ptql_parse_branch_t;
typedef struct ptql_branch_t ptql_branch_t;
/* adhere to calling convention, else risk stack corruption */
#ifdef WIN32
#define SIGAPI WINAPI
#else
#define SIGAPI
#endif
typedef int (SIGAPI *ptql_get_t)(sigar_t *sigar, sigar_pid_t pid, void *data);
typedef int (*ptql_branch_init_t)(ptql_parse_branch_t *parsed, ptql_branch_t *branch,
sigar_ptql_error_t *error);
typedef int (*ptql_op_ui64_t)(ptql_branch_t *branch,
sigar_uint64_t haystack,
sigar_uint64_t needle);
typedef int (*ptql_op_ui32_t)(ptql_branch_t *branch,
sigar_uint32_t haystack,
sigar_uint32_t needle);
typedef int (*ptql_op_dbl_t)(ptql_branch_t *branch,
double haystack,
double needle);
typedef int (*ptql_op_str_t)(ptql_branch_t *branch,
char *haystack,
char *needle);
typedef int (*ptql_op_chr_t)(ptql_branch_t *branch,
char haystack,
char needle);
typedef enum {
PTQL_VALUE_TYPE_UI64,
PTQL_VALUE_TYPE_UI32,
PTQL_VALUE_TYPE_DBL,
PTQL_VALUE_TYPE_CHR,
PTQL_VALUE_TYPE_STR,
PTQL_VALUE_TYPE_ANY
} ptql_value_type_t;
typedef enum {
PTQL_OP_EQ,
PTQL_OP_NE,
PTQL_OP_GT,
PTQL_OP_GE,
PTQL_OP_LT,
PTQL_OP_LE,
#define PTQL_OP_MAX_NSTR PTQL_OP_LE
PTQL_OP_EW, /* rest are string only */
PTQL_OP_SW,
PTQL_OP_RE,
PTQL_OP_CT,
PTQL_OP_MAX
} ptql_op_name_t;
#define PTQL_OP_FLAG_PARENT 1
#define PTQL_OP_FLAG_REF 2
#define PTQL_OP_FLAG_GLOB 4
#define PTQL_OP_FLAG_PID 8
struct ptql_parse_branch_t {
char *name;
char *attr;
char *op;
char *value;
unsigned int op_flags;
};
typedef struct {
char *name;
ptql_get_t get;
size_t offset;
unsigned int data_size;
ptql_value_type_t type;
ptql_branch_init_t init;
} ptql_lookup_t;
#define DATA_PTR(branch) \
((char *)branch->data.ptr + branch->lookup->offset)
static void data_free(void *data)
{
free(data);
}
typedef union {
sigar_pid_t pid;
sigar_uint64_t ui64;
sigar_uint32_t ui32;
double dbl;
char chr[4];
char *str;
void *ptr;
} any_value_t;
struct ptql_branch_t {
ptql_lookup_t *lookup;
any_value_t data;
unsigned int data_size;
void (*data_free)(void *);
unsigned int flags;
unsigned int op_flags;
ptql_op_name_t op_name;
union {
ptql_op_ui64_t ui64;
ptql_op_ui32_t ui32;
ptql_op_dbl_t dbl;
ptql_op_chr_t chr;
ptql_op_str_t str;
} match;
any_value_t value;
void (*value_free)(void *);
};
typedef struct {
char *name;
ptql_lookup_t *members;
} ptql_entry_t;
typedef struct {
unsigned long number;
unsigned long size;
ptql_branch_t *data;
} ptql_branch_list_t;
struct sigar_ptql_query_t {
ptql_branch_list_t branches;
#ifdef PTQL_DEBUG
char *ptql;
#endif
};
/* XXX optimize */
static ptql_op_name_t ptql_op_code_get(char *op)
{
if (strEQ(op, "eq")) {
return PTQL_OP_EQ;
}
else if (strEQ(op, "ne")) {
return PTQL_OP_NE;
}
else if (strEQ(op, "gt")) {
return PTQL_OP_GT;
}
else if (strEQ(op, "ge")) {
return PTQL_OP_GE;
}
else if (strEQ(op, "lt")) {
return PTQL_OP_LT;
}
else if (strEQ(op, "le")) {
return PTQL_OP_LE;
}
else if (strEQ(op, "ew")) {
return PTQL_OP_EW;
}
else if (strEQ(op, "sw")) {
return PTQL_OP_SW;
}
else if (strEQ(op, "re")) {
return PTQL_OP_RE;
}
else if (strEQ(op, "ct")) {
return PTQL_OP_CT;
}
else {
return PTQL_OP_MAX;
}
}
static int ptql_op_ui64_eq(ptql_branch_t *branch,
sigar_uint64_t haystack, sigar_uint64_t needle)
{
return haystack == needle;
}
static int ptql_op_ui64_ne(ptql_branch_t *branch,
sigar_uint64_t haystack, sigar_uint64_t needle)
{
return haystack != needle;
}
static int ptql_op_ui64_gt(ptql_branch_t *branch,
sigar_uint64_t haystack, sigar_uint64_t needle)
{
return haystack > needle;
}
static int ptql_op_ui64_ge(ptql_branch_t *branch,
sigar_uint64_t haystack, sigar_uint64_t needle)
{
return haystack >= needle;
}
static int ptql_op_ui64_lt(ptql_branch_t *branch,
sigar_uint64_t haystack, sigar_uint64_t needle)
{
return haystack < needle;
}
static int ptql_op_ui64_le(ptql_branch_t *branch,
sigar_uint64_t haystack, sigar_uint64_t needle)
{
return haystack <= needle;
}
static ptql_op_ui64_t ptql_op_ui64[] = {
ptql_op_ui64_eq,
ptql_op_ui64_ne,
ptql_op_ui64_gt,
ptql_op_ui64_ge,
ptql_op_ui64_lt,
ptql_op_ui64_le
};
static int ptql_op_ui32_eq(ptql_branch_t *branch,
sigar_uint32_t haystack, sigar_uint32_t needle)
{
return haystack == needle;
}
static int ptql_op_ui32_ne(ptql_branch_t *branch,
sigar_uint32_t haystack, sigar_uint32_t needle)
{
return haystack != needle;
}
static int ptql_op_ui32_gt(ptql_branch_t *branch,
sigar_uint32_t haystack, sigar_uint32_t needle)
{
return haystack > needle;
}
static int ptql_op_ui32_ge(ptql_branch_t *branch,
sigar_uint32_t haystack, sigar_uint32_t needle)
{
return haystack >= needle;
}
static int ptql_op_ui32_lt(ptql_branch_t *branch,
sigar_uint32_t haystack, sigar_uint32_t needle)
{
return haystack < needle;
}
static int ptql_op_ui32_le(ptql_branch_t *branch,
sigar_uint32_t haystack, sigar_uint32_t needle)
{
return haystack <= needle;
}
static ptql_op_ui32_t ptql_op_ui32[] = {
ptql_op_ui32_eq,
ptql_op_ui32_ne,
ptql_op_ui32_gt,
ptql_op_ui32_ge,
ptql_op_ui32_lt,
ptql_op_ui32_le
};
static int ptql_op_dbl_eq(ptql_branch_t *branch,
double haystack, double needle)
{
return haystack == needle;
}
static int ptql_op_dbl_ne(ptql_branch_t *branch,
double haystack, double needle)
{
return haystack != needle;
}
static int ptql_op_dbl_gt(ptql_branch_t *branch,
double haystack, double needle)
{
return haystack > needle;
}
static int ptql_op_dbl_ge(ptql_branch_t *branch,
double haystack, double needle)
{
return haystack >= needle;
}
static int ptql_op_dbl_lt(ptql_branch_t *branch,
double haystack, double needle)
{
return haystack < needle;
}
static int ptql_op_dbl_le(ptql_branch_t *branch,
double haystack, double needle)
{
return haystack <= needle;
}
static ptql_op_dbl_t ptql_op_dbl[] = {
ptql_op_dbl_eq,
ptql_op_dbl_ne,
ptql_op_dbl_gt,
ptql_op_dbl_ge,
ptql_op_dbl_lt,
ptql_op_dbl_le
};
static int ptql_op_str_eq(ptql_branch_t *branch,
char *haystack, char *needle)
{
return strEQ(haystack, needle);
}
static int ptql_op_str_ne(ptql_branch_t *branch,
char *haystack, char *needle)
{
return !strEQ(haystack, needle);
}
static int ptql_op_str_gt(ptql_branch_t *branch,
char *haystack, char *needle)
{
return strcmp(haystack, needle) > 0;
}
static int ptql_op_str_ge(ptql_branch_t *branch,
char *haystack, char *needle)
{
return strcmp(haystack, needle) >= 0;
}
static int ptql_op_str_lt(ptql_branch_t *branch,
char *haystack, char *needle)
{
return strcmp(haystack, needle) < 0;
}
static int ptql_op_str_le(ptql_branch_t *branch,
char *haystack, char *needle)
{
return strcmp(haystack, needle) <= 0;
}
static int ptql_op_str_ew(ptql_branch_t *branch,
char *haystack, char *needle)
{
int nlen = strlen(needle);
int hlen = strlen(haystack);
int diff = hlen - nlen;
if (diff < 0) {
return 0;
}
return strnEQ(haystack + diff, needle, nlen);
}
static int ptql_op_str_sw(ptql_branch_t *branch,
char *haystack, char *needle)
{
return strnEQ(haystack, needle, strlen(needle));
}
static int ptql_op_str_re(ptql_branch_t *branch,
char *haystack, char *needle)
{
#ifdef SIGAR_HAS_PCRE
pcre *re = (pcre *)branch->value.ptr;
int len = strlen(haystack);
int rc =
pcre_exec(re, NULL, haystack, len, 0, 0, NULL, 0);
return rc >= 0;
#else
return 0;
#endif
}
static int ptql_op_str_ct(ptql_branch_t *branch,
char *haystack, char *needle)
{
return strstr(haystack, needle) != NULL;
}
static ptql_op_str_t ptql_op_str[] = {
ptql_op_str_eq,
ptql_op_str_ne,
ptql_op_str_gt,
ptql_op_str_ge,
ptql_op_str_lt,
ptql_op_str_le,
ptql_op_str_ew,
ptql_op_str_sw,
ptql_op_str_re,
ptql_op_str_ct
};
static int ptql_op_chr_eq(ptql_branch_t *branch,
char haystack, char needle)
{
return haystack == needle;
}
static int ptql_op_chr_ne(ptql_branch_t *branch,
char haystack, char needle)
{
return haystack != needle;
}
static int ptql_op_chr_gt(ptql_branch_t *branch,
char haystack, char needle)
{
return haystack > needle;
}
static int ptql_op_chr_ge(ptql_branch_t *branch,
char haystack, char needle)
{
return haystack >= needle;
}
static int ptql_op_chr_lt(ptql_branch_t *branch,
char haystack, char needle)
{
return haystack < needle;
}
static int ptql_op_chr_le(ptql_branch_t *branch,
char haystack, char needle)
{
return haystack <= needle;
}
static ptql_op_chr_t ptql_op_chr[] = {
ptql_op_chr_eq,
ptql_op_chr_ne,
ptql_op_chr_gt,
ptql_op_chr_ge,
ptql_op_chr_lt,
ptql_op_chr_le
};
#define PTQL_BRANCH_LIST_MAX 3
#define PTQL_BRANCH_LIST_GROW(branches) \
if ((branches)->number >= (branches)->size) { \
ptql_branch_list_grow(branches); \
}
static int ptql_branch_list_create(ptql_branch_list_t *branches)
{
branches->number = 0;
branches->size = PTQL_BRANCH_LIST_MAX;
branches->data = malloc(sizeof(*(branches->data)) *
branches->size);
return SIGAR_OK;
}
static int ptql_branch_list_grow(ptql_branch_list_t *branches)
{
branches->data =
realloc(branches->data,
sizeof(*(branches->data)) *
(branches->size + PTQL_BRANCH_LIST_MAX));
branches->size += PTQL_BRANCH_LIST_MAX;
return SIGAR_OK;
}
static int ptql_branch_list_destroy(ptql_branch_list_t *branches)
{
if (branches->size) {
int i;
for (i=0; i<branches->number; i++) {
ptql_branch_t *branch =
&branches->data[i];
if (branch->data_size && branch->data.ptr) {
branch->data_free(branch->data.ptr);
}
if (branch->lookup &&
(branch->lookup->type == PTQL_VALUE_TYPE_STR) &&
!(branch->op_flags & PTQL_OP_FLAG_REF))
{
if (branch->value.str) {
branch->value_free(branch->value.str);
}
}
}
free(branches->data);
branches->number = branches->size = 0;
}
return SIGAR_OK;
}
#ifdef WIN32
#define vsnprintf _vsnprintf
#endif
#define PTQL_ERRNAN \
ptql_error(error, "Query value '%s' is not a number", parsed->value)
static int ptql_error(sigar_ptql_error_t *error, const char *format, ...)
{
va_list args;
if (error != NULL) {
va_start(args, format);
vsnprintf(error->message, sizeof(error->message), format, args);
va_end(args);
}
return SIGAR_PTQL_MALFORMED_QUERY;
}
static int ptql_branch_init_any(ptql_parse_branch_t *parsed,
ptql_branch_t *branch,
sigar_ptql_error_t *error)
{
branch->data.str = sigar_strdup(parsed->attr);
branch->data_size = strlen(parsed->attr);
return SIGAR_OK;
}
static int ptql_str_match(sigar_t *sigar, ptql_branch_t *branch, char *value)
{
if (!branch->value.str) {
return 0;
}
#ifndef SIGAR_HAS_PCRE
if (branch->op_name == PTQL_OP_RE) {
if (sigar->ptql_re_impl) {
return sigar->ptql_re_impl(sigar->ptql_re_data,
value,
branch->value.str);
}
else {
return 0;
}
}
#endif
return branch->match.str(branch,
value,
branch->value.str);
}
static int ptql_branch_match(ptql_branch_t *branch)
{
switch (branch->lookup->type) {
case PTQL_VALUE_TYPE_UI64:
return branch->match.ui64(branch,
*(sigar_uint64_t *)DATA_PTR(branch),
branch->value.ui64);
case PTQL_VALUE_TYPE_UI32:
return branch->match.ui32(branch,
*(sigar_uint32_t *)DATA_PTR(branch),
branch->value.ui32);
case PTQL_VALUE_TYPE_CHR:
return branch->match.chr(branch,
*(char *)DATA_PTR(branch),
branch->value.chr[0]);
case PTQL_VALUE_TYPE_STR:
case PTQL_VALUE_TYPE_ANY:
if (!branch->value.str) {
return 0;
}
return branch->match.str(branch,
(char *)DATA_PTR(branch),
branch->value.str);
default:
return 0;
}
}
static int ptql_branch_match_ref(ptql_branch_t *branch, ptql_branch_t *ref)
{
switch (branch->lookup->type) {
case PTQL_VALUE_TYPE_UI64:
return branch->match.ui64(branch,
*(sigar_uint64_t *)DATA_PTR(branch),
*(sigar_uint64_t *)DATA_PTR(ref));
case PTQL_VALUE_TYPE_UI32:
return branch->match.ui32(branch,
*(sigar_uint32_t *)DATA_PTR(branch),
*(sigar_uint32_t *)DATA_PTR(ref));
case PTQL_VALUE_TYPE_CHR:
return branch->match.chr(branch,
*(char *)DATA_PTR(branch),
*(char *)DATA_PTR(ref));
case PTQL_VALUE_TYPE_STR:
case PTQL_VALUE_TYPE_ANY:
return branch->match.str(branch,
(char *)DATA_PTR(branch),
(char *)DATA_PTR(ref));
default:
return 0;
}
}
enum {
PTQL_PID_PID,
PTQL_PID_FILE,
PTQL_PID_SERVICE
};
#ifdef SIGAR_64BIT
#define str2pid(value, ptr) strtoull(value, &ptr, 10)
#define pid_branch_match(branch, pid, match_pid) \
ptql_op_ui64[branch->op_name](branch, pid, match_pid)
#else
#define str2pid(value, ptr) strtoul(value, &ptr, 10)
#define pid_branch_match(branch, pid, match_pid) \
ptql_op_ui32[branch->op_name](branch, pid, match_pid)
#endif
static int ptql_branch_init_pid(ptql_parse_branch_t *parsed,
ptql_branch_t *branch,
sigar_ptql_error_t *error)
{
branch->op_flags |= PTQL_OP_FLAG_PID;
if (strEQ(parsed->attr, "Pid")) {
branch->flags = PTQL_PID_PID;
if (strEQ(parsed->value, "$$")) {
branch->data.pid = getpid();
}
else {
char *ptr;
branch->data.pid = str2pid(parsed->value, ptr);
if (strtonum_failed(parsed->value, ptr)) {
return PTQL_ERRNAN;
}
}
return SIGAR_OK;
}
else if (strEQ(parsed->attr, "PidFile")) {
branch->flags = PTQL_PID_FILE;
branch->data.str = sigar_strdup(parsed->value);
branch->data_size = strlen(parsed->value);
return SIGAR_OK;
}
else if (strEQ(parsed->attr, "Service")) {
branch->flags = PTQL_PID_SERVICE;
#ifdef WIN32
branch->data.str = sigar_strdup(parsed->value);
branch->data_size = strlen(parsed->value);
#endif
return SIGAR_OK;
}
else {
return ptql_error(error, "Unsupported %s attribute: %s",
parsed->name, parsed->attr);
}
}
static int ptql_pid_get(sigar_t *sigar,
ptql_branch_t *branch,
sigar_pid_t *pid)
{
char *ptr;
if (branch->flags == PTQL_PID_FILE) {
char buffer[SIGAR_PATH_MAX+1];
int status =
sigar_file2str((const char *)branch->data.str,
buffer, sizeof(buffer)-1);
if (status != SIGAR_OK) {
return status;
}
*pid = str2pid(buffer, ptr);
if ((buffer == ptr) || (errno == ERANGE)) {
return errno;
}
}
else if (branch->flags == PTQL_PID_SERVICE) {
#ifdef WIN32
int status =
sigar_service_pid_get(sigar,
branch->data.str, pid);
if (status != SIGAR_OK) {
return status;
}
#else
return SIGAR_ENOTIMPL;
#endif
}
else {
*pid = branch->data.pid;
}
return SIGAR_OK;
}
static int SIGAPI ptql_pid_match(sigar_t *sigar,
sigar_pid_t pid,
void *data)
{
ptql_branch_t *branch =
(ptql_branch_t *)data;
sigar_pid_t match_pid;
int matched;
int status =
ptql_pid_get(sigar, branch, &match_pid);
if (status != SIGAR_OK) {
return status;
}
matched = pid_branch_match(branch, pid, match_pid);
return matched ? SIGAR_OK : 1;
}
static int ptql_args_branch_init(ptql_parse_branch_t *parsed,
ptql_branch_t *branch,
sigar_ptql_error_t *error)
{
if (strEQ(parsed->attr, "*")) {
branch->op_flags |= PTQL_OP_FLAG_GLOB;
}
else {
char *end;
branch->data.ui32 =
strtol(parsed->attr, &end, 10);
if (strtonum_failed(parsed->attr, end)) {
/* conversion failed */
return ptql_error(error, "%s is not a number", parsed->attr);
}
}
return SIGAR_OK;
}
static int SIGAPI ptql_args_match(sigar_t *sigar,
sigar_pid_t pid,
void *data)
{
ptql_branch_t *branch =
(ptql_branch_t *)data;
int status, matched=0;
sigar_proc_args_t args;
status = sigar_proc_args_get(sigar, pid, &args);
if (status != SIGAR_OK) {
return status;
}
if (branch->op_flags & PTQL_OP_FLAG_GLOB) {
int i;
for (i=0; i<args.number; i++) {
matched =
ptql_str_match(sigar, branch, args.data[i]);
if (matched) {
break;
}
}
}
else {
int num = branch->data.ui32;
/* e.g. find last element of args: Args.-1.eq=weblogic.Server */
if (num < 0) {
num += args.number;
}
if ((num >= 0) && (num < args.number)) {
matched =
ptql_str_match(sigar, branch, args.data[num]);
}
}
sigar_proc_args_destroy(sigar, &args);
return matched ? SIGAR_OK : !SIGAR_OK;
}
typedef struct {
const char *key;
int klen;
char *val;
int vlen;
} sigar_proc_env_entry_t;
static int sigar_proc_env_get_key(void *data,
const char *key, int klen,
char *val, int vlen)
{
sigar_proc_env_entry_t *entry =
(sigar_proc_env_entry_t *)data;
if ((entry->klen == klen) &&
(strcmp(entry->key, key) == 0))
{
entry->val = val;
entry->vlen = vlen;
return !SIGAR_OK; /* foundit; stop iterating */
}
return SIGAR_OK;
}
static int SIGAPI ptql_env_match(sigar_t *sigar,
sigar_pid_t pid,
void *data)
{
ptql_branch_t *branch =
(ptql_branch_t *)data;
int status, matched=0;
sigar_proc_env_t procenv;
sigar_proc_env_entry_t entry;
/* XXX ugh this is klunky */
entry.key = branch->data.str;
entry.klen = branch->data_size;
entry.val = NULL;
procenv.type = SIGAR_PROC_ENV_KEY;
procenv.key = branch->data.str;
procenv.klen = branch->data_size;
procenv.env_getter = sigar_proc_env_get_key;
procenv.data = &entry;
status = sigar_proc_env_get(sigar, pid, &procenv);
if (status != SIGAR_OK) {
return status;
}
else {
if (entry.val) {
matched =
ptql_str_match(sigar, branch, entry.val);
}
}
return matched ? SIGAR_OK : !SIGAR_OK;
}
static int ptql_branch_init_port(ptql_parse_branch_t *parsed,
ptql_branch_t *branch,
sigar_ptql_error_t *error)
{
char *ptr;
/* only 'eq' is supported here */
if (branch->op_name != PTQL_OP_EQ) {
return ptql_error(error, "%s requires 'eq' operator",
parsed->name);
}
if (strEQ(parsed->attr, "tcp")) {
branch->flags = SIGAR_NETCONN_TCP;
}
else if (strEQ(parsed->attr, "udp")) {
branch->flags = SIGAR_NETCONN_UDP;
}
else {
return ptql_error(error, "Unsupported %s protocol: %s",
parsed->name, parsed->attr);
}
branch->data.ui32 = strtoul(parsed->value, &ptr, 10);
if (strtonum_failed(parsed->value, ptr)) {
return PTQL_ERRNAN;
}
return SIGAR_OK;
}
static int SIGAPI ptql_port_match(sigar_t *sigar,
sigar_pid_t pid,
void *data)
{
ptql_branch_t *branch =
(ptql_branch_t *)data;
unsigned long port =
branch->data.ui32;
int status;
sigar_pid_t match_pid=0;
status =
sigar_proc_port_get(sigar, branch->flags, port, &match_pid);
if (status != SIGAR_OK) {
return status;
}
return (pid == match_pid) ? SIGAR_OK : !SIGAR_OK;
}
#define PTQL_LOOKUP_ENTRY(cname, member, type) \
(ptql_get_t)sigar_##cname##_get, \
sigar_offsetof(sigar_##cname##_t, member), \
sizeof(sigar_##cname##_t), \
PTQL_VALUE_TYPE_##type, \
NULL
/* XXX uid/pid can be larger w/ 64bit mode */
#define PTQL_VALUE_TYPE_PID PTQL_VALUE_TYPE_UI32
#define PTQL_VALUE_TYPE_UID PTQL_VALUE_TYPE_UI32
static ptql_lookup_t PTQL_Time[] = {
{ "StartTime", PTQL_LOOKUP_ENTRY(proc_time, start_time, UI64) },
{ "User", PTQL_LOOKUP_ENTRY(proc_time, user, UI64) },
{ "Sys", PTQL_LOOKUP_ENTRY(proc_time, sys, UI64) },
{ "Total", PTQL_LOOKUP_ENTRY(proc_time, total, UI64) },
{ NULL }
};
static ptql_lookup_t PTQL_Cpu[] = {
{ "StartTime", PTQL_LOOKUP_ENTRY(proc_cpu, start_time, UI64) },
{ "User", PTQL_LOOKUP_ENTRY(proc_cpu, user, UI64) },
{ "Sys", PTQL_LOOKUP_ENTRY(proc_cpu, sys, UI64) },
{ "Total", PTQL_LOOKUP_ENTRY(proc_cpu, total, UI64) },
{ "Percent", PTQL_LOOKUP_ENTRY(proc_cpu, total, DBL) },
{ NULL }
};
static ptql_lookup_t PTQL_CredName[] = {
{ "User", PTQL_LOOKUP_ENTRY(proc_cred_name, user, STR) },
{ "Group", PTQL_LOOKUP_ENTRY(proc_cred_name, group, STR) },
{ NULL }
};
static ptql_lookup_t PTQL_Mem[] = {
{ "Size", PTQL_LOOKUP_ENTRY(proc_mem, size, UI64) },
{ "Resident", PTQL_LOOKUP_ENTRY(proc_mem, resident, UI64) },
{ "Share", PTQL_LOOKUP_ENTRY(proc_mem, share, UI64) },
{ "MinorFaults", PTQL_LOOKUP_ENTRY(proc_mem, minor_faults, UI64) },
{ "MajorFaults", PTQL_LOOKUP_ENTRY(proc_mem, major_faults, UI64) },
{ "PageFaults", PTQL_LOOKUP_ENTRY(proc_mem, page_faults, UI64) },
{ NULL }
};
static ptql_lookup_t PTQL_Exe[] = {
{ "Name", PTQL_LOOKUP_ENTRY(proc_exe, name, STR) },
{ "Cwd", PTQL_LOOKUP_ENTRY(proc_exe, cwd, STR) },
{ NULL }
};
static ptql_lookup_t PTQL_Cred[] = {
{ "Uid", PTQL_LOOKUP_ENTRY(proc_cred, uid, UID) },
{ "Gid", PTQL_LOOKUP_ENTRY(proc_cred, gid, UID) },
{ "Euid", PTQL_LOOKUP_ENTRY(proc_cred, euid, UID) },
{ "Egid", PTQL_LOOKUP_ENTRY(proc_cred, egid, UID) },
{ NULL }
};
static ptql_lookup_t PTQL_State[] = {
{ "State", PTQL_LOOKUP_ENTRY(proc_state, state, CHR) },
{ "Name", PTQL_LOOKUP_ENTRY(proc_state, name, STR) },
{ "Ppid", PTQL_LOOKUP_ENTRY(proc_state, ppid, PID) },
{ "Tty", PTQL_LOOKUP_ENTRY(proc_state, tty, UI32) },
{ "Nice", PTQL_LOOKUP_ENTRY(proc_state, nice, UI32) },
{ "Priority", PTQL_LOOKUP_ENTRY(proc_state, priority, UI32) },
{ "Threads", PTQL_LOOKUP_ENTRY(proc_state, threads, UI64) },
{ "Processor", PTQL_LOOKUP_ENTRY(proc_state, processor, UI32) },
{ NULL }
};
static ptql_lookup_t PTQL_Fd[] = {
{ "Total", PTQL_LOOKUP_ENTRY(proc_fd, total, UI64) },
{ NULL }
};
static ptql_lookup_t PTQL_Args[] = {
{ NULL, ptql_args_match, 0, 0, PTQL_VALUE_TYPE_ANY, ptql_args_branch_init }
};
static ptql_lookup_t PTQL_Env[] = {
{ NULL, ptql_env_match, 0, 0, PTQL_VALUE_TYPE_ANY, ptql_branch_init_any }
};
static ptql_lookup_t PTQL_Port[] = {
{ NULL, ptql_port_match, 0, 0, PTQL_VALUE_TYPE_ANY, ptql_branch_init_port }
};
static ptql_lookup_t PTQL_Pid[] = {
{ NULL, ptql_pid_match, 0, 0, PTQL_VALUE_TYPE_ANY, ptql_branch_init_pid }
};
static ptql_entry_t ptql_map[] = {
{ "Time", PTQL_Time },
{ "Cpu", PTQL_Cpu },
{ "CredName", PTQL_CredName },
{ "Mem", PTQL_Mem },
{ "Exe", PTQL_Exe },
{ "Cred", PTQL_Cred },
{ "State", PTQL_State },
{ "Fd", PTQL_Fd },
{ "Args", PTQL_Args },
{ "Env", PTQL_Env },
{ "Port", PTQL_Port },
{ "Pid", PTQL_Pid },
{ NULL }
};
static int ptql_branch_parse(char *query, ptql_parse_branch_t *branch,
sigar_ptql_error_t *error)
{
char *ptr = strchr(query, '=');
if (!ptr) {
return ptql_error(error, "Missing '='");
}
branch->op_flags = 0;
*ptr = '\0';
branch->value = ++ptr;
if ((ptr = strchr(query, '.'))) {
*ptr = '\0';
branch->name = query;
query = ++ptr;
}
else {
return ptql_error(error, "Missing '.'");
}
if ((ptr = strchr(query, '.'))) {
*ptr = '\0';
branch->attr = query;
query = ++ptr;
}
else {
return ptql_error(error, "Missing '.'");
}
if (*query) {
char flag;
while (sigar_isupper((flag = *query))) {
switch (flag) {
case 'P':
branch->op_flags |= PTQL_OP_FLAG_PARENT;
break;
default:
return ptql_error(error, "Unsupported modifier: %c", flag);
}
++query;
}
branch->op = query;
}
else {
return ptql_error(error, "Missing query");
}
return SIGAR_OK;
}
static int ptql_branch_add(ptql_parse_branch_t *parsed,
ptql_branch_list_t *branches,
sigar_ptql_error_t *error)
{
ptql_branch_t *branch;
ptql_entry_t *entry = NULL;
ptql_lookup_t *lookup = NULL;
int i, is_set=0;
char *ptr;
PTQL_BRANCH_LIST_GROW(branches);
branch = &branches->data[branches->number++];
SIGAR_ZERO(branch);
branch->data_free = data_free;
branch->value_free = data_free;
branch->op_flags = parsed->op_flags;
branch->op_name = ptql_op_code_get(parsed->op);
if (branch->op_name == PTQL_OP_MAX) {
return ptql_error(error, "Unsupported operator: %s", parsed->op);
}
for (i=0; ptql_map[i].name; i++) {
if (strEQ(ptql_map[i].name, parsed->name)) {
entry = &ptql_map[i];
break;
}
}
if (!entry) {
return ptql_error(error, "Unsupported method: %s", parsed->name);
}
for (i=0; entry->members[i].name; i++) {
if (strEQ(entry->members[i].name, parsed->attr)) {
lookup = &entry->members[i];
break;
}
}
if (!lookup) {
if (entry->members[0].type == PTQL_VALUE_TYPE_ANY) {
/* Args, Env, etc. */
lookup = &entry->members[0];
}
else {
return ptql_error(error, "Unsupported %s attribute: %s",
parsed->name, parsed->attr);
}
}
if (lookup->init) {
int status = lookup->init(parsed, branch, error);
if (status != SIGAR_OK) {
return status;
}
}
branch->lookup = lookup;
if ((lookup->type < PTQL_VALUE_TYPE_STR) &&
(branch->op_name > PTQL_OP_MAX_NSTR))
{
return ptql_error(error, "Unsupported operator '%s' for %s.%s",
parsed->op, parsed->name, parsed->attr);
}
if (*parsed->value == '$') {
is_set = 1;
if (branch->op_name == PTQL_OP_RE) {
/* not for use with .re */
return ptql_error(error, "Unsupported operator '%s' with variable %s",
parsed->op, parsed->value);
}
if (sigar_isdigit(*(parsed->value+1))) {
branch->op_flags |= PTQL_OP_FLAG_REF;
parsed->op_flags = branch->op_flags; /* for use by caller */
branch->value.ui32 = atoi(parsed->value+1) - 1;
if (branch->value.ui32 >= branches->number) {
/* out-of-range */
return ptql_error(error, "Variable %s out of range (%d)",
parsed->value, branches->number);
}
else if (branch->value.ui32 == branches->number-1) {
/* self reference */
return ptql_error(error, "Variable %s self reference",
parsed->value);
}
}
else {
if ((ptr = getenv(parsed->value+1))) {
branch->value.str = sigar_strdup(ptr);
}
else {
branch->value.str = NULL;
}
}
}
else if (branch->op_name == PTQL_OP_RE) {
#ifdef SIGAR_HAS_PCRE
const char *error;
int offset;
pcre *re =
pcre_compile(parsed->value, 0,
&error, &offset, NULL);
if (!re) {
/* XXX pcre_error ? */
return ptql_error(error, "Invalid regex");
}
is_set = 1;
branch->value.ptr = re;
branch->value_free = pcre_free;
#endif
}
switch (lookup->type) {
case PTQL_VALUE_TYPE_UI64:
branch->match.ui64 = ptql_op_ui64[branch->op_name];
if (!is_set) {
branch->value.ui64 = strtoull(parsed->value, &ptr, 10);
if (strtonum_failed(parsed->value, ptr)) {
return PTQL_ERRNAN;
}
}
break;
case PTQL_VALUE_TYPE_UI32:
branch->match.ui32 = ptql_op_ui32[branch->op_name];
if (!is_set) {
branch->value.ui32 = strtoul(parsed->value, &ptr, 10);
if (strtonum_failed(parsed->value, ptr)) {
return PTQL_ERRNAN;
}
}
break;
case PTQL_VALUE_TYPE_DBL:
branch->match.dbl = ptql_op_dbl[branch->op_name];
if (!is_set) {
branch->value.dbl = strtod(parsed->value, &ptr);
if (strtonum_failed(parsed->value, ptr)) {
return PTQL_ERRNAN;
}
}
break;
case PTQL_VALUE_TYPE_CHR:
branch->match.chr = ptql_op_chr[branch->op_name];
if (!is_set) {
if (strlen(parsed->value) != 1) {
return ptql_error(error, "%s is not a char", parsed->value);
}
branch->value.chr[0] = parsed->value[0];
}
break;
case PTQL_VALUE_TYPE_STR:
case PTQL_VALUE_TYPE_ANY:
branch->match.str = ptql_op_str[branch->op_name];
if (!is_set) {
branch->value.str = sigar_strdup(parsed->value);
}
break;
}
return SIGAR_OK;
}
static int ptql_branch_compare(const void *b1, const void *b2)
{
/* XXX can do better */
ptql_branch_t *branch1 = (ptql_branch_t *)b1;
ptql_branch_t *branch2 = (ptql_branch_t *)b2;
return
branch1->lookup->type -
branch2->lookup->type;
}
SIGAR_DECLARE(int) sigar_ptql_query_create(sigar_ptql_query_t **queryp,
char *ptql,
sigar_ptql_error_t *error)
{
char *ptr, *ptql_copy = sigar_strdup(ptql);
int status = SIGAR_OK;
int has_ref = 0;
sigar_ptql_query_t *query =
*queryp = malloc(sizeof(*query));
(void)ptql_error(error, "Malformed query");
#ifdef PTQL_DEBUG
query->ptql = sigar_strdup(ptql);
#endif
ptql = ptql_copy;
ptql_branch_list_create(&query->branches);
do {
ptql_parse_branch_t parsed;
if ((ptr = strchr(ptql, ','))) {
*ptr = '\0';
}
status = ptql_branch_parse(ptql, &parsed, error);
if (status == SIGAR_OK) {
status =
ptql_branch_add(&parsed, &query->branches, error);
if (status != SIGAR_OK) {
break;
}
if (parsed.op_flags & PTQL_OP_FLAG_REF) {
has_ref = 1;
}
}
else {
break;
}
if (ptr) {
ptql = ++ptr;
}
else {
break;
}
} while (*ptql);
free(ptql_copy);
if (status != SIGAR_OK) {
sigar_ptql_query_destroy(query);
*queryp = NULL;
}
else if (!has_ref && (query->branches.number > 1)) {
qsort(query->branches.data,
query->branches.number,
sizeof(query->branches.data[0]),
ptql_branch_compare);
}
if (status == SIGAR_OK) {
(void)ptql_error(error, "OK");
}
return status;
}
SIGAR_DECLARE(int) sigar_ptql_query_destroy(sigar_ptql_query_t *query)
{
#ifdef PTQL_DEBUG
free(query->ptql);
#endif
ptql_branch_list_destroy(&query->branches);
free(query);
return SIGAR_OK;
}
SIGAR_DECLARE(void) sigar_ptql_re_impl_set(sigar_t *sigar, void *data,
sigar_ptql_re_impl_t impl)
{
sigar->ptql_re_data = data;
sigar->ptql_re_impl = impl;
}
SIGAR_DECLARE(int) sigar_ptql_query_match(sigar_t *sigar,
sigar_ptql_query_t *query,
sigar_pid_t query_pid)
{
int i;
for (i=0; i<query->branches.number; i++) {
sigar_pid_t pid = query_pid;
int status, matched=0;
ptql_branch_t *branch = &query->branches.data[i];
ptql_lookup_t *lookup = branch->lookup;
if (branch->op_flags & PTQL_OP_FLAG_PARENT) {
sigar_proc_state_t state;
status = sigar_proc_state_get(sigar, pid, &state);
if (status != SIGAR_OK) {
return status;
}
pid = state.ppid;
}
if (lookup->type == PTQL_VALUE_TYPE_ANY) {
/* Args, Env, etc. */
status = lookup->get(sigar, pid, branch);
if (status == SIGAR_OK) {
matched = 1;
}
}
else {
/* standard sigar_proc_*_get / structptr + offset */
if (!branch->data.ptr) {
branch->data_size = lookup->data_size;
branch->data.ptr = malloc(branch->data_size);
}
status = lookup->get(sigar, pid, branch->data.ptr);
if (status != SIGAR_OK) {
return status;
}
if (branch->op_flags & PTQL_OP_FLAG_REF) {
ptql_branch_t *ref =
&query->branches.data[branch->value.ui32];
matched = ptql_branch_match_ref(branch, ref);
}
#ifndef SIGAR_HAS_PCRE
else if (branch->lookup->type == PTQL_VALUE_TYPE_STR) {
matched = ptql_str_match(sigar, branch, (char *)DATA_PTR(branch));
}
#endif
else {
matched = ptql_branch_match(branch);
}
}
if (!matched) {
return 1;
}
}
return SIGAR_OK;
}
SIGAR_DECLARE(int) sigar_ptql_query_find_process(sigar_t *sigar,
sigar_ptql_query_t *query,
sigar_pid_t *pid)
{
int status;
int i, matches=0;
sigar_proc_list_t *pids;
if ((query->branches.number == 1) &&
(query->branches.data[0].op_flags & PTQL_OP_FLAG_PID))
{
/* avoid scanning the process list for single Pid.* queries */
return ptql_pid_get(sigar, &query->branches.data[0], pid);
}
status = sigar_proc_list_get(sigar, NULL);
if (status != SIGAR_OK) {
return status;
}
pids = sigar->pids;
for (i=0; i<pids->number; i++) {
int query_status =
sigar_ptql_query_match(sigar, query, pids->data[i]);
if (query_status == SIGAR_OK) {
*pid = pids->data[i];
matches++;
}
else if (query_status == SIGAR_ENOTIMPL) {
/* let caller know query is invalid. */
status = query_status;
break;
} /* else ok, e.g. permission denied */
}
if (status != SIGAR_OK) {
return status;
}
if (matches == 1) {
return SIGAR_OK;
}
else if (matches == 0) {
sigar_strerror_set(sigar,
"Query did not match any processes");
}
else {
sigar_strerror_printf(sigar,
"Query matched multiple processes (%d)",
matches);
}
return -1;
}
SIGAR_DECLARE(int) sigar_ptql_query_find(sigar_t *sigar,
sigar_ptql_query_t *query,
sigar_proc_list_t *proclist)
{
int status;
int i;
sigar_proc_list_t *pids;
status = sigar_proc_list_get(sigar, NULL);
if (status != SIGAR_OK) {
return status;
}
pids = sigar->pids;
sigar_proc_list_create(proclist);
for (i=0; i<pids->number; i++) {
int query_status =
sigar_ptql_query_match(sigar, query, pids->data[i]);
if (query_status == SIGAR_OK) {
SIGAR_PROC_LIST_GROW(proclist);
proclist->data[proclist->number++] = pids->data[i];
}
else if (query_status == SIGAR_ENOTIMPL) {
/* let caller know query is invalid. */
status = query_status;
break;
}
}
if (status != SIGAR_OK) {
sigar_proc_list_destroy(sigar, proclist);
return status;
}
return SIGAR_OK;
}
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