mirror of
https://github.com/termux-pacman/glibc-packages.git
synced 2024-11-13 13:59:21 +00:00
76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
#include <stdarg.h>
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#include <ipc_priv.h>
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#include <sysdep.h>
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#include <shlib-compat.h>
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#include <errno.h>
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#include <shmem-android.h>
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#include <asm-generic/ipcbuf.h>
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#include <asm-generic/shmbuf.h>
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#ifndef shmid_ds
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# define shmid_ds shmid64_ds
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#endif
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int shmctl(int shmid, int cmd, struct shmid_ds *buf)
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{
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ashv_check_pid();
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if (cmd == IPC_RMID) {
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DBG("%s: IPC_RMID for shmid=%x\n", __PRETTY_FUNCTION__, shmid);
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pthread_mutex_lock(&mutex);
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int idx = ashv_find_local_index(shmid);
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if (idx == -1) {
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DBG("%s: shmid=%x does not exist locally\n", __PRETTY_FUNCTION__, shmid);
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/* We do not rm non-local regions, but do not report an error for that. */
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pthread_mutex_unlock(&mutex);
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return 0;
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}
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if (shmem[idx].addr) {
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// shmctl(2): The segment will actually be destroyed only
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// after the last process detaches it (i.e., when the shm_nattch
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// member of the associated structure shmid_ds is zero.
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shmem[idx].markedForDeletion = true;
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} else {
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android_shmem_delete(idx);
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}
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pthread_mutex_unlock(&mutex);
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return 0;
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} else if (cmd == IPC_STAT) {
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if (!buf) {
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DBG ("%s: ERROR: buf == NULL for shmid %x\n", __PRETTY_FUNCTION__, shmid);
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errno = EINVAL;
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return -1;
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}
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pthread_mutex_lock(&mutex);
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int idx = ashv_find_local_index(shmid);
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if (idx == -1) {
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DBG ("%s: ERROR: shmid %x does not exist\n", __PRETTY_FUNCTION__, shmid);
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pthread_mutex_unlock (&mutex);
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errno = EINVAL;
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return -1;
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}
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/* Report max permissive mode */
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memset(buf, 0, sizeof(struct shmid_ds));
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buf->shm_segsz = shmem[idx].size;
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buf->shm_nattch = 1;
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buf->shm_perm.key = shmem[idx].key;
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buf->shm_perm.uid = geteuid();
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buf->shm_perm.gid = getegid();
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buf->shm_perm.cuid = geteuid();
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buf->shm_perm.cgid = getegid();
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buf->shm_perm.mode = 0666;
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buf->shm_perm.seq = 1;
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pthread_mutex_unlock (&mutex);
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return 0;
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}
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DBG("%s: cmd %d not implemented yet!\n", __PRETTY_FUNCTION__, cmd);
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errno = EINVAL;
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return -1;
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}
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weak_alias (shmctl, __shmctl64)
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