about msgget troble Post: 12370

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Top Forums Programming about msgget troble Post 12370 by subrain on Friday 28th of December 2001 08:40:13 AM

12-28-2001

Registered User

ok,this is my program in the form

/* this is main entry */
main()
{
char sErrMsg[100];
EXEC SQL BEGIN DECLARE SECTION;
char sWorkDB[20];
EXEC SQL END DECLARE SECTION;

/* control signal */
signal( SIGCHLD,SIG_IGN );
signal( SIGKILL,exitfunc );
signal( SIGQUIT,exitfunc );
signal( SIGPIPE,SIG_IGN );
signal( SIGTRAP,sigerr );

/* to build a queue */
msgid__=openMsg(2101);
if( msgid__ <=0 ){
fprintf( stderr,"%s\n",strerror(errno) );
fprintf( stderr,"create queue error!!\n" );
exit(-1);
}
.......
}

/* this is the function body about openMsg */
int openMsg( key_t k )
{
int iRtn;
key_t key;
char sFilePath[200];
if( k == 0 ){
/* if k is zero , get key by a file */
sprintf( sFilePath,"%s/MSG_ERR_ID",getenv("CNF_PATH") );
key=ftok(sFilePath,'@');
if( key < 0 ){
errorlog("%s.[%s,%d]",strerror(errno),__FILE__,__LINE__);
return -1;
}
}
else{
key = k;
}

iRtn=msgget(key,IPC_CREAT|IPC_EXCL|0666);
if( iRtn<=0){
errorlog("%s.[%s,%d]",strerror(errno),__FILE__,__LINE__);
}
end:
return iRtn;
}

subrain

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LEARN ABOUT CENTOS

msgid

msgid(1M)                                                 System Administration Commands                                                 msgid(1M)

NAME

       msgid - generate message IDs

SYNOPSIS

       /usr/sbin/msgid

DESCRIPTION

       The msgid utility generates message IDs.

       A message ID is a numeric identifier that, with a high probability, uniquely identifies a message. The probability of two distinct messages
       having the same ID is about one in a million. Specifically, the message ID is a hash signature on the message's unexpanded  format  string,
       generated by STRLOG_MAKE_MSGID() as defined in <sys/strlog.h>.

       syslogd(1M) is a simple filter that takes strings as input and produces those same strings, preceded by their message IDs, as output. Every
       message logged by syslogd(1M) includes the message ID. The message ID is intended to serve as a small, language-independent identifier.

EXAMPLES

       Example 1: Using the msgid command to generate a message ID

       The following example uses the msgid command to generate a message ID for the echo command.

       example# echo hello | msgid
       205790 hello

       Example 2: Using the msgid command to generate a message catalog

       The following example uses the msgid command to enumerate all of the messages in the binary ufs, to generate a message catalog.

       example# strings /kernel/fs/ufs | msgid
       137713 free:
           freeing free frag, dev:0x%lx, blk:%ld, cg:%d, ino:%lu, fs:%s
       567420 ialloccg: block not in mapfs = %s
       845546 alloc: %s: file system full
       ...

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       syslogd(1M), attributes(5), log(7d)

SunOS 5.10                                                          9 Oct 1998                                                           msgid(1M)