11-14-2007
ok...........here is the section of my code..........
from main I am Calling function.......
setup_ipc("msqueue",1234,INPUT_IPC,LARGE_QUEUE);
and its defination is in another *.cpp file
and here is its defination
int setup_ipc (const char * ipc_name, long base_add, int io_type, int ipc_qtype)
{
char sbuffer[FILENAMELEN + 1];
key_t msg_key;
int msg_flag;
if ((io_type != INPUT_IPC && io_type != OUTPUT_IPC) ||
(ipc_qtype != SMALL_QUEUE && ipc_qtype != LARGE_QUEUE &&
ipc_qtype != PRI_QUEUE && ipc_qtype != MAIL_BOX &&
ipc_qtype != SOCKET_QUEUE)) {return(-1);}
if (!(*ipc_name)) {return(-1);}
/** look for the end of ipc_tbl **/
lipc_tbl = &ipc_lhead;
for (ipc_tbl = ipc_lhead.ipc_nextent; ipc_tbl;lipc_tbl = ipc_tbl, ipc_tbl = ipc_tbl->ipc_nextent);
ipc_tbl = (struct ipc_ent *) malloc(sizeof(struct ipc_ent));
if ( !ipc_tbl ) {return(-1);}
/** init table entry variables **/
strncpy(sbuffer, ipc_name, FILENAMELEN);
sbuffer[FILENAMELEN - 1] = '\0';
sprintf(ipc_tbl->fname, "%s", sbuffer);
ipc_tbl->ipc_tag = ++ipc_ecnt;
ipc_tbl->io_type = io_type;
ipc_tbl->vlmsg_id = -1;
ipc_tbl->sockfd = -1;
ipc_tbl->vlkey_id = base_add;
ipc_tbl->qtype = ipc_qtype;
ipc_tbl->ipc_nextent = NULL;
/** open message queue **/
if (ipc_qtype != SOCKET_QUEUE)
{
msg_key = ipc_tbl->vlkey_id;
if (io_type == INPUT_IPC)
msg_flag = IPC_CREAT | IPC_EXCL | 0666;
else
msg_flag = 0666;
errno = 0;
while ((ipc_tbl->vlmsg_id = msgget(msg_key, msg_flag)) < 0 && errno == EEXIST)
{
errno = 0;
msg_key++;
}
if (errno != 0)
{ // error other than EEXIST occurs
free(ipc_tbl);
return(-1);
}
ipc_tbl->vlkey_id = msg_key;
}
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regex(3) Library Functions Manual regex(3)
Name
re_comp, re_exec - regular expression handler
Syntax
char *re_comp(s)
char *s;
re_exec(s)
char *s;
Description
The subroutine compiles a string into an internal form suitable for pattern matching. The subroutine checks the argument string against
the last string passed to
The subroutine returns 0 if the string s was compiled successfully; otherwise a string containing an error message is returned. If is
passed 0 or a null string, it returns without changing the currently compiled regular expression.
The subroutine returns 1 if the string s matches the last compiled regular expression, 0 if the string s failed to match the last compiled
regular expression, and -1 if the compiled regular expression was invalid (indicating an internal error).
The strings passed to both and may have trailing or embedded newline characters; they are terminated by nulls. The regular expressions
recognized are described in the manual entry for given the above difference.
Diagnostics
The subroutine returns -1 for an internal error.
The subroutine returns one of the following strings if an error occurs:
No previous regular expression
Regular expression too long
unmatched (
missing ]
too many () pairs
unmatched )
See Also
ed(1), ex(1), egrep(1), fgrep(1), grep(1)
regex(3)