freem/src/shmmgr.c - diff

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Diff for /freem/src/shmmgr.c between versions 1.9 and 1.12

version 1.9, 2025/04/15 16:49:36	version 1.12, 2025/04/15 21:57:10
Line 24	Line 24
* along with FreeM. If not, see <https://www.gnu.org/licenses/>.	* along with FreeM. If not, see <https://www.gnu.org/licenses/>.
*	*
* $Log$	* $Log$
	* Revision 1.12 2025/04/15 21:57:10 snw
	* Fix SysV IPC bugs on FreeBSD
	*
	* Revision 1.11 2025/04/15 21:08:51 snw
	* Add some useful debug output
	*
	* Revision 1.10 2025/04/15 19:26:13 snw
	* Remove extra whitespace
	*
* Revision 1.9 2025/04/15 16:49:36 snw	* Revision 1.9 2025/04/15 16:49:36 snw
* Make use of logprintf throughout codebase	* Make use of logprintf throughout codebase
*	*
Line 84 void shm_daemon_init(void);	Line 93 void shm_daemon_init(void);

shm_config_t shm_config = (shm_config_t ) NULL;	shm_config_t shm_config = (shm_config_t ) NULL;

	#if defined(__FreeBSD__)
	# define FM_SHM_PERMS 0660
	#else
	# define FM_SHM_PERMS 0770
	#endif

short shm_init(const size_t seg_size)	short shm_init(const size_t seg_size)
{	{
size_t alloc_map_size;	size_t alloc_map_size;
Line 105 short shm_init(const size_t seg_size)	Line 120 short shm_init(const size_t seg_size)
shm_config->segsiz = seg_size + alloc_map_size + pg_size;	shm_config->segsiz = seg_size + alloc_map_size + pg_size;
shm_config->key = ftok (config_file, 1);	shm_config->key = ftok (config_file, 1);
shm_config->pgsiz = pg_size;	shm_config->pgsiz = pg_size;

shm_config->seg_id = shmget (shm_config->key, shm_config->segsiz, 0770 \| IPC_CREAT);	shm_config->seg_id = shmget (shm_config->key, shm_config->segsiz, FM_SHM_PERMS \| IPC_CREAT);
if (shm_config->seg_id == -1) {	if (shm_config->seg_id == -1) {
if (errno == 22) {	if (errno == 22) {
logprintf (FM_LOG_ERROR, "shm_init: cannot get shared memory segment of %ld bytes", (unsigned long) shm_config->segsiz);	logprintf (FM_LOG_ERROR, "shm_init: cannot get shared memory segment of %ld bytes", (unsigned long) shm_config->segsiz);
Line 169 short shm_init(const size_t seg_size)	Line 184 short shm_init(const size_t seg_size)
/* grab the pointers we need */	/* grab the pointers we need */
void *old_addr = shm_config->dta;	void *old_addr = shm_config->dta;
void *new_addr = shm_config->hdr->shmad;	void *new_addr = shm_config->hdr->shmad;

	logprintf (FM_LOG_INFO, "shmmgr: remapping shared memory from virtual address %p to %p", old_addr, new_addr);

/* detach and reattach */	/* detach and reattach */
if (shmdt (old_addr) == -1) {	if (shmdt (old_addr) == -1) {
logprintf (FM_LOG_FATAL, "shm_init: detach failed during detach/reattach [shmdt error %s]", strerror (errno));	logprintf (FM_LOG_FATAL, "shm_init: detach failed during detach/reattach [shmdt error %s]", strerror (errno));
}	}

#if defined(__FreeBSD__)
shm_config->dta = shmat (shm_config->seg_id, new_addr, SHM_REMAP);
#else
shm_config->dta = shmat (shm_config->seg_id, new_addr, 0);	shm_config->dta = shmat (shm_config->seg_id, new_addr, 0);
#endif



if (shm_config->dta == (void *) -1) {	if (shm_config->dta == (void *) -1) {
logprintf (FM_LOG_FATAL, "shm_init: fatal error attaching shared memory segment [shmat error '%s']", strerror (errno));	logprintf (FM_LOG_FATAL, "shm_init: fatal error attaching shared memory segment [shmat error '%s']", strerror (errno));

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Removed from v.1.9
changed lines
	Added in v.1.12