conclusion

05/musl-0.6.0/src/ipc/ftok.c

@@ -0,0 +1,10 @@
+#include <sys/ipc.h>
+#include <sys/stat.h>
+
+key_t ftok(const char *path, int id)
+{
+	struct stat st;
+	if (stat(path, &st) < 0) return -1;
+
+	return ((st.st_ino & 0xffff) | ((st.st_dev & 0xff) << 16) | ((id & 0xff) << 24));
+}

05/musl-0.6.0/src/ipc/ipc.h

@@ -0,0 +1,13 @@
+#define IPCOP_semop      1
+#define IPCOP_semget     2
+#define IPCOP_semctl     3
+#define IPCOP_msgsnd    11
+#define IPCOP_msgrcv    12
+#define IPCOP_msgget    13
+#define IPCOP_msgctl    14
+#define IPCOP_shmat     21
+#define IPCOP_shmdt     22
+#define IPCOP_shmget    23
+#define IPCOP_shmctl    24
+
+#define IPC_MODERN   0x100

05/musl-0.6.0/src/ipc/semctl.c

@@ -0,0 +1,18 @@
+#include <sys/sem.h>
+#include <stdarg.h>
+#include "syscall.h"
+#include "ipc.h"
+
+int semctl(int id, int num, int cmd, ...)
+{
+	long arg;
+	va_list ap;
+	va_start(ap, cmd);
+	arg = va_arg(ap, long);
+	va_end(ap);
+#ifdef __NR_semctl
+	return syscall4(__NR_semctl, id, num, cmd, arg);
+#else
+	return syscall5(__NR_ipc, IPCOP_semctl, id, num, cmd | 0x100, (long)&arg);
+#endif
+}

05/musl-0.6.0/src/ipc/semget.c

@@ -0,0 +1,12 @@
+#include <sys/sem.h>
+#include "syscall.h"
+#include "ipc.h"
+
+int semget(key_t key, int n, int fl)
+{
+#ifdef __NR_semget
+	return syscall3(__NR_semget, key, n, fl);
+#else
+	return syscall4(__NR_ipc, IPCOP_semget, key, n, fl);
+#endif
+}

05/musl-0.6.0/src/ipc/semop.c

@@ -0,0 +1,12 @@
+#include <sys/sem.h>
+#include "syscall.h"
+#include "ipc.h"
+
+int semop(int id, struct sembuf *buf, size_t n)
+{
+#ifdef __NR_semop
+	return syscall3(__NR_semop, id, (long)buf, n);
+#else
+	return syscall5(__NR_ipc, IPCOP_semop, id, n, 0, (long)buf);
+#endif
+}

05/musl-0.6.0/src/ipc/shmat.c

@@ -0,0 +1,17 @@
+#include <sys/shm.h>
+#include "syscall.h"
+#include "ipc.h"
+
+#ifdef __NR_shmat
+void *shmat(int id, const void *addr, int flag)
+{
+	return (void *)syscall3(__NR_shmat, id, (long)addr, flag);
+}
+#else
+void *shmat(int id, const void *addr, int flag)
+{
+	unsigned long ret;
+	ret = syscall5(__NR_ipc, IPCOP_shmat, id, flag, (long)&addr, (long)addr);
+	return (ret > -(unsigned long)SHMLBA) ? (void *)ret : (void *)addr;
+}
+#endif

05/musl-0.6.0/src/ipc/shmctl.c

@@ -0,0 +1,12 @@
+#include <sys/shm.h>
+#include "syscall.h"
+#include "ipc.h"
+
+int shmctl(int id, int cmd, struct shmid_ds *buf)
+{
+#ifdef __NR_shmctl
+	return syscall3(__NR_shmctl, id, cmd, (long)buf);
+#else
+	return syscall4(__NR_ipc, IPCOP_shmctl, id, cmd | IPC_MODERN, (long)buf);
+#endif
+}

05/musl-0.6.0/src/ipc/shmdt.c

@@ -0,0 +1,12 @@
+#include <sys/shm.h>
+#include "syscall.h"
+#include "ipc.h"
+
+int shmdt(const void *addr)
+{
+#ifdef __NR_shmdt
+	return syscall1(__NR_shmdt, (long)addr);
+#else
+	return syscall2(__NR_ipc, IPCOP_shmdt, (long)addr);
+#endif
+}

05/musl-0.6.0/src/ipc/shmget.c

@@ -0,0 +1,12 @@
+#include <sys/shm.h>
+#include "syscall.h"
+#include "ipc.h"
+
+int shmget(key_t key, size_t size, int flag)
+{
+#ifdef __NR_shmget
+	return syscall3(__NR_shmget, key, size, flag);
+#else
+	return syscall4(__NR_ipc, IPCOP_shmget, key, size, flag);
+#endif
+}