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start making thread-safe

This commit is contained in:
Doug MacEachern 2005-03-11 21:20:30 +00:00
parent 94f842e473
commit 6d2f12c6b9
2 changed files with 81 additions and 76 deletions
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140
src/os/solaris/get_mib2.c
View File

@ -47,18 +47,6 @@ static char copyright[] =
#include <stropts.h>
#include <unistd.h>
/*
* Local static values
*/
static char *Db = NULL; /* data buffer */
static int Dbl = 0; /* data buffer length */
static char *Smb = NULL; /* stream message buffer */
static size_t Smbl = 0; /* size of Smb[] */
static int Sd = -1; /* stream device descriptor; not open
* if -1 */
static char ErrMsg[GET_MIB2_ERRMSGL]; /* error message buffer */
/*
* close_mib2() - close MIB2 access
*
@ -70,27 +58,27 @@ static char ErrMsg[GET_MIB2_ERRMSGL]; /* error message buffer */
*/
int
close_mib2(char **errmsg)
close_mib2(solaris_mib2_t *mib2, char **errmsg)
{
*errmsg = ErrMsg;
if (Sd < 0) {
(void) strcpy(ErrMsg, "close_mib2: socket not open");
*errmsg = mib2->errmsg;
if (mib2->sd < 0) {
(void) strcpy(mib2->errmsg, "close_mib2: socket not open");
return(GET_MIB2_ERR_NOTOPEN);
}
if (close(Sd)) {
(void) sprintf(ErrMsg, "close_mib2: %s", strerror(errno));
if (close(mib2->sd)) {
(void) sprintf(mib2->errmsg, "close_mib2: %s", strerror(errno));
return(GET_MIB2_ERR_CLOSE);
}
Sd = -1;
if (Dbl && Db) {
Dbl = 0;
free((void *)Db);
Db = NULL;
mib2->sd = -1;
if (mib2->db_len && mib2->db) {
mib2->db_len = 0;
free((void *)mib2->db);
mib2->db = NULL;
}
if (Smbl && Smb) {
Smbl = 0;
free((void *)Smb);
Smb = NULL;
if (mib2->smb_len && mib2->smb) {
mib2->smb_len = 0;
free((void *)mib2->smb);
mib2->smb = NULL;
}
return(GET_MIB2_OK);
}
@ -110,7 +98,8 @@ close_mib2(char **errmsg)
*/
int
get_mib2(struct opthdr **opt,
get_mib2(solaris_mib2_t *mib2,
struct opthdr **opt,
char **data,
int *datalen,
char **errmsg)
@ -125,24 +114,24 @@ get_mib2(struct opthdr **opt,
static struct T_optmgmt_req *r; /* message request pointer */
int rc; /* reply code */
*errmsg = ErrMsg;
*errmsg = mib2->errmsg;
/*
* If MIB2 access isn't open, open it and issue the preliminary stream
* messages.
*/
if (Sd < 0) {
if (mib2->sd < 0) {
/*
* Open access. Return on error.
*/
if ((err = open_mib2(errmsg))) {
if ((err = open_mib2(mib2, errmsg))) {
return(err);
}
/*
* Set up message request and option.
*/
r = (struct T_optmgmt_req *)Smb;
o = (struct opthdr *)&Smb[sizeof(struct T_optmgmt_req)];
r = (struct T_optmgmt_req *)mib2->smb;
o = (struct opthdr *)&mib2->smb[sizeof(struct T_optmgmt_req)];
r->PRIM_type = T_OPTMGMT_REQ;
r->OPT_offset = sizeof(struct T_optmgmt_req);
r->OPT_length = sizeof(struct opthdr);
@ -159,30 +148,30 @@ get_mib2(struct opthdr **opt,
o->level = MIB2_IP;
o->name = o->len = 0;
c.buf = Smb;
c.buf = mib2->smb;
c.len = r->OPT_offset + r->OPT_length;
/*
* Put the message.
*/
if (putmsg(Sd, &c, (struct strbuf *)NULL, 0) == -1) {
(void) sprintf(ErrMsg,
if (putmsg(mib2->sd, &c, (struct strbuf *)NULL, 0) == -1) {
(void) sprintf(mib2->errmsg,
"get_mib2: putmsg request: %s", strerror(errno));
return(GET_MIB2_ERR_PUTMSG);
}
/*
* Set up to process replies.
*/
a = (struct T_optmgmt_ack *)Smb;
c.maxlen = Smbl;
e = (struct T_error_ack *)Smb;
o = (struct opthdr *)&Smb[sizeof(struct T_optmgmt_ack)];
a = (struct T_optmgmt_ack *)mib2->smb;
c.maxlen = mib2->smb_len;
e = (struct T_error_ack *)mib2->smb;
o = (struct opthdr *)&mib2->smb[sizeof(struct T_optmgmt_ack)];
}
/*
* Get the next (first) reply message.
*/
f = 0;
if ((rc = getmsg(Sd, &c, NULL, &f)) < 0) {
(void) sprintf(ErrMsg, "get_mib2: getmsg(reply): %s",
if ((rc = getmsg(mib2->sd, &c, NULL, &f)) < 0) {
(void) sprintf(mib2->errmsg, "get_mib2: getmsg(reply): %s",
strerror(errno));
return(GET_MIB2_ERR_GETMSGR);
}
@ -195,7 +184,7 @@ get_mib2(struct opthdr **opt,
&& a->MGMT_flags == T_SUCCESS
&& o->len == 0)
{
err = close_mib2(errmsg);
err = close_mib2(mib2, errmsg);
if (err) {
return(err);
}
@ -207,7 +196,7 @@ get_mib2(struct opthdr **opt,
if (c.len >= sizeof(struct T_error_ack)
&& e->PRIM_type == T_ERROR_ACK)
{
(void) sprintf(ErrMsg,
(void) sprintf(mib2->errmsg,
"get_mib2: T_ERROR_ACK: len=%d, TLI=%#x, UNIX=%#x",
c.len, (int)e->TLI_error, (int)e->UNIX_error);
return(GET_MIB2_ERR_ACK);
@ -220,7 +209,7 @@ get_mib2(struct opthdr **opt,
|| a->PRIM_type != T_OPTMGMT_ACK
|| a->MGMT_flags != T_SUCCESS)
{
(void) sprintf(ErrMsg,
(void) sprintf(mib2->errmsg,
"get_mib2: T_OPTMGMT_ACK: "
"rc=%d len=%d type=%#x flags=%#x",
rc, c.len, (int)a->PRIM_type, (int)a->MGMT_flags);
@ -229,17 +218,18 @@ get_mib2(struct opthdr **opt,
/*
* Allocate (or enlarge) the data buffer.
*/
if (o->len >= Dbl) {
Dbl = o->len;
if (Db == NULL) {
Db = (char *)malloc(Dbl);
if (o->len >= mib2->db_len) {
mib2->db_len = o->len;
if (mib2->db == NULL) {
mib2->db = (char *)malloc(mib2->db_len);
}
else {
Db = (char *)realloc(Db, Dbl);
mib2->db = (char *)realloc(mib2->db, mib2->db_len);
}
if (Db == NULL) {
(void) sprintf(ErrMsg,
"get_mib2: no space for %d byte data buffer", Dbl);
if (mib2->db == NULL) {
(void) sprintf(mib2->errmsg,
"get_mib2: no space for %d byte data buffer",
mib2->db_len);
return(GET_MIB2_ERR_NOSPC);
}
}
@ -247,16 +237,16 @@ get_mib2(struct opthdr **opt,
* Get the data part of the message -- the MIB2 part.
*/
d.maxlen = o->len;
d.buf = Db;
d.buf = mib2->db;
d.len = 0;
f = 0;
if ((rc = getmsg(Sd, NULL, &d, &f)) < 0) {
(void) sprintf(ErrMsg, "get_mib2: getmsg(data): %s",
if ((rc = getmsg(mib2->sd, NULL, &d, &f)) < 0) {
(void) sprintf(mib2->errmsg, "get_mib2: getmsg(data): %s",
strerror(errno));
return(GET_MIB2_ERR_GETMSGD);
}
if (rc) {
(void) sprintf(ErrMsg,
(void) sprintf(mib2->errmsg,
"get_mib2: getmsg(data): rc=%d maxlen=%d len=%d: %s",
rc, d.maxlen, d.len, strerror(errno));
return(GET_MIB2_ERR_GETMSGD);
@ -265,7 +255,7 @@ get_mib2(struct opthdr **opt,
* Compose a successful return.
*/
*opt = o;
*data = Db;
*data = mib2->db;
*datalen = d.len;
return(GET_MIB2_OK);
}
@ -282,46 +272,46 @@ get_mib2(struct opthdr **opt,
*/
int
open_mib2(char **errmsg)
open_mib2(solaris_mib2_t *mib2, char **errmsg)
{
*errmsg = ErrMsg;
*errmsg = mib2->errmsg;
/*
* It's an error if the stream device is already open.
*/
if (Sd >= 0) {
(void) strcpy(ErrMsg, "open_mib2: MIB2 access already open");
if (mib2->sd >= 0) {
(void) strcpy(mib2->errmsg, "open_mib2: MIB2 access already open");
return(GET_MIB2_ERR_OPEN);
}
/*
* Open the ARP stream device, push TCP and UDP on it.
*/
if ((Sd = open(GET_MIB2_ARPDEV, O_RDWR, 0600)) < 0) {
(void) sprintf(ErrMsg, "open_mib2: %s: %s", GET_MIB2_ARPDEV,
if ((mib2->sd = open(GET_MIB2_ARPDEV, O_RDWR, 0600)) < 0) {
(void) sprintf(mib2->errmsg, "open_mib2: %s: %s", GET_MIB2_ARPDEV,
strerror(errno));
return(GET_MIB2_ERR_ARPOPEN);
}
if (ioctl(Sd, I_PUSH, GET_MIB2_TCPSTREAM) == -1) {
(void) sprintf(ErrMsg, "open_mib2: push %s: %s",
if (ioctl(mib2->sd, I_PUSH, GET_MIB2_TCPSTREAM) == -1) {
(void) sprintf(mib2->errmsg, "open_mib2: push %s: %s",
GET_MIB2_TCPSTREAM, strerror(errno));
return(GET_MIB2_ERR_TCPPUSH);
}
if (ioctl(Sd, I_PUSH, GET_MIB2_UDPSTREAM) == -1) {
(void) sprintf(ErrMsg, "open_mib2: push %s: %s",
if (ioctl(mib2->sd, I_PUSH, GET_MIB2_UDPSTREAM) == -1) {
(void) sprintf(mib2->errmsg, "open_mib2: push %s: %s",
GET_MIB2_UDPSTREAM, strerror(errno));
return(GET_MIB2_ERR_UDPPUSH);
}
/*
* Allocate a stream message buffer.
*/
Smbl = sizeof(struct opthdr) + sizeof(struct T_optmgmt_req);
if (Smbl < (sizeof (struct opthdr) + sizeof(struct T_optmgmt_ack))) {
Smbl = sizeof (struct opthdr) + sizeof(struct T_optmgmt_ack);
mib2->smb_len = sizeof(struct opthdr) + sizeof(struct T_optmgmt_req);
if (mib2->smb_len < (sizeof (struct opthdr) + sizeof(struct T_optmgmt_ack))) {
mib2->smb_len = sizeof (struct opthdr) + sizeof(struct T_optmgmt_ack);
}
if (Smbl < sizeof(struct T_error_ack)) {
Smbl = sizeof(struct T_error_ack);
if (mib2->smb_len < sizeof(struct T_error_ack)) {
mib2->smb_len = sizeof(struct T_error_ack);
}
if ((Smb = (char *)malloc(Smbl)) == NULL) {
(void) strcpy(ErrMsg,
if ((mib2->smb = (char *)malloc(mib2->smb_len)) == NULL) {
(void) strcpy(mib2->errmsg,
"open_mib2: no space for stream message buffer");
return(GET_MIB2_ERR_NOSPC);
}

17
src/os/solaris/get_mib2.h
View File

@ -32,7 +32,10 @@
* 4. This notice may not be removed or altered.
*/
/*
* Changes for sigar:
* - remove static stuff to make thread-safe
*/
#if !defined(GET_MIB2_H)
#define GET_MIB2_H
@ -86,11 +89,21 @@
#define GET_MIB2_ERR_MAX 13 /* maximum error number + 1 */
typedef struct {
char *db; /* data buffer */
int db_len; /* data buffer length */
char *smb; /* stream message buffer */
size_t smb_len; /* size of Smb[] */
int sd; /* stream device descriptor */
char errmsg[GET_MIB2_ERRMSGL]; /* error message buffer */
} solaris_mib2_t;
/*
* Function prototypes
*/
int close_mib2( /* close acccess to MIB2 information */
solaris_mib2_t *mib2,
char **errmsg /* error message buffer return
* address (if return value
* > GET_MIB2_OK.) The error
@ -99,6 +112,7 @@ int close_mib2( /* close acccess to MIB2 information */
* been defined. */
);
int get_mib2( /* get MIB2 information */
solaris_mib2_t *mib2,
struct opthdr **opt, /* opthdr pointer return (see
* <sys/socket.h> */
char **data, /* data buffer return address */
@ -112,6 +126,7 @@ int get_mib2( /* get MIB2 information */
* been defined. */
);
int open_mib2( /* open acccess to MIB2 information */
solaris_mib2_t *mib2,
char **errmsg /* error message buffer return
* address (if return value
* > GET_MIB2_OK.) The error