c3db1c6939
make weak symbol references and namespace renames references the renamed versions. function renaming, weak symbol references and libc namespace.h protection interact in hairy ways and causes weak symbol references for renamed functions to be unresolved; e.g. vfork should be an alias for _vfork but _vfork doesn't exist because __vfork14() exists. this is a problem for dynamically linked executables as all symbols have to be resolved, used or not, at link time. it was masked by clang-compiled base system libraries but is a problem when gcc does it.
96 lines
1.7 KiB
C
96 lines
1.7 KiB
C
#define __USE_MISC
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#define _SYSTEM 1
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#define _MINIX 1
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#include <sys/cdefs.h>
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#include <lib.h>
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#include "namespace.h"
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#include <lib.h>
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#include <minix/rs.h>
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/sem.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <errno.h>
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static int get_ipc_endpt(endpoint_t *pt)
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{
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return minix_rs_lookup("ipc", pt);
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}
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/* Get semaphore. */
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int semget(key_t key, int nsems, int semflag)
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{
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message m;
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endpoint_t ipc_pt;
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int r;
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if (get_ipc_endpt(&ipc_pt) != OK) {
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errno = ENOSYS;
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return -1;
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}
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m.SEMGET_KEY = key;
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m.SEMGET_NR = nsems;
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m.SEMGET_FLAG = semflag;
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r = _syscall(ipc_pt, IPC_SEMGET, &m);
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if (r != OK)
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return r;
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return m.SEMGET_RETID;
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}
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/* Semaphore control operation. */
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int semctl(int semid, int semnum, int cmd, ...)
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{
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message m;
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endpoint_t ipc_pt;
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va_list ap;
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int r;
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if (get_ipc_endpt(&ipc_pt) != OK) {
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errno = ENOSYS;
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return -1;
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}
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m.SEMCTL_ID = semid;
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m.SEMCTL_NUM = semnum;
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m.SEMCTL_CMD = cmd;
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va_start(ap, cmd);
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if (cmd == IPC_STAT || cmd == IPC_SET || cmd == IPC_INFO ||
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cmd == SEM_INFO || cmd == SEM_STAT || cmd == GETALL ||
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cmd == SETALL || cmd == SETVAL)
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m.SEMCTL_OPT = (long) va_arg(ap, long);
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va_end(ap);
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r = _syscall(ipc_pt, IPC_SEMCTL, &m);
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if ((r != -1) && (cmd == GETNCNT || cmd == GETZCNT || cmd == GETPID ||
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cmd == GETVAL || cmd == IPC_INFO || cmd == SEM_INFO ||
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cmd == SEM_STAT))
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return m.SHMCTL_RET;
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return r;
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}
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/* Operate on semaphore. */
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int semop(int semid, struct sembuf *sops, size_t nsops)
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{
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message m;
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endpoint_t ipc_pt;
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if (get_ipc_endpt(&ipc_pt) != OK) {
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errno = ENOSYS;
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return -1;
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}
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m.SEMOP_ID = semid;
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m.SEMOP_OPS = (long) sops;
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m.SEMOP_SIZE = nsops;
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return _syscall(ipc_pt, IPC_SEMOP, &m);
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}
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