NAME | SYNOPSIS | INTERFACE LEVEL | PARAMETERS | DESCRIPTION | RETURN VALUES | CONTEXT | EXAMPLES | SUMMARY OF TRUSTED SOLARIS CHANGES | SEE ALSO | NOTES
#include <sys/stream.h>mblk_t *copymsg(mblk_t *mp);
Architecture independent level 1 (DDI/DKI).
copymsg() forms a new message by allocating new message blocks and copying the contents of the message referred to by mp, using the copyb(9F) function. It returns a pointer to the new message.
If the copy is successful, copymsg() returns a pointer to the new message. Otherwise, it returns a NULL pointer.
copymsg() can be called from user or interrupt context.
The routine lctouc() converts all the lowercase ASCII characters in the message to uppercase. If the reference count is greater than one (line 8), then the message is shared, and must be copied before changing the contents of the data buffer. If the call to the copymsg() function fails (line 9), return NULL (line 10), otherwise, free the original message (line 11). If the reference count is equal to 1, the message can be modified. For each character (line 16) in each message block (line 15), if it is a lowercase letter, convert it to an uppercase letter (line 18). A pointer to the converted message is returned (line 21).
1 mblk_t *lctouc(mp) 2 mblk_t *mp; 3 { 4 mblk_t *cmp; 5 mblk_t *tmp; 6 unsigned char *cp; 7 8 if (mp->b_datap->db_ref > 1) { 9 if ((cmp = copymsg(mp)) == NULL) 10 return (NULL); 11 freemsg(mp); 12 } else { 13 cmp = mp; 14 } 15 for (tmp = cmp; tmp; tmp = tmp->b_cont) { 16 for (cp = tmp->b_rptr; cp < tmp->b_wptr; cp++) { 17 if ((*cp <= 'z') && (*cp >= 'a')) 18 *cp -= 0x20; 19 } 20 } 21 return(cmp); 22 }
This routine will assign correct attributes to the message it copies.
These interfaces are uncommitted. Although not expected to do so, they may change between minor Trusted Solaris releases.
NAME | SYNOPSIS | INTERFACE LEVEL | PARAMETERS | DESCRIPTION | RETURN VALUES | CONTEXT | EXAMPLES | SUMMARY OF TRUSTED SOLARIS CHANGES | SEE ALSO | NOTES