From 4abab5ad6c8465a7528ccdd5f49367da05f78bbd Mon Sep 17 00:00:00 2001 From: Vladimir Azarov Date: Tue, 1 Oct 2024 15:47:05 +0200 Subject: Initial version --- src/ipc/shmctl.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 src/ipc/shmctl.c (limited to 'src/ipc/shmctl.c') diff --git a/src/ipc/shmctl.c b/src/ipc/shmctl.c new file mode 100644 index 0000000..1c9f78c --- /dev/null +++ b/src/ipc/shmctl.c @@ -0,0 +1,51 @@ +#include +#include +#include "syscall.h" +#include "ipc.h" + +#if __BYTE_ORDER != __BIG_ENDIAN +#undef SYSCALL_IPC_BROKEN_MODE +#endif + +int shmctl(int id, int cmd, struct shmid_ds *buf) +{ +#if IPC_TIME64 + struct shmid_ds out, *orig; + if (cmd&IPC_TIME64) { + out = (struct shmid_ds){0}; + orig = buf; + buf = &out; + } +#endif +#ifdef SYSCALL_IPC_BROKEN_MODE + struct shmid_ds tmp; + if (cmd == IPC_SET) { + tmp = *buf; + tmp.shm_perm.mode *= 0x10000U; + buf = &tmp; + } +#endif +#ifndef SYS_ipc + int r = __syscall(SYS_shmctl, id, IPC_CMD(cmd), buf); +#else + int r = __syscall(SYS_ipc, IPCOP_shmctl, id, IPC_CMD(cmd), 0, buf, 0); +#endif +#ifdef SYSCALL_IPC_BROKEN_MODE + if (r >= 0) switch (cmd | IPC_TIME64) { + case IPC_STAT: + case SHM_STAT: + case SHM_STAT_ANY: + buf->shm_perm.mode >>= 16; + } +#endif +#if IPC_TIME64 + if (r >= 0 && (cmd&IPC_TIME64)) { + buf = orig; + *buf = out; + IPC_HILO(buf, shm_atime); + IPC_HILO(buf, shm_dtime); + IPC_HILO(buf, shm_ctime); + } +#endif + return __syscall_ret(r); +} -- cgit v1.2.3