diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/msgctl.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/msgctl.c | 56 |
1 files changed, 53 insertions, 3 deletions
diff --git a/sysdeps/unix/sysv/linux/msgctl.c b/sysdeps/unix/sysv/linux/msgctl.c index a52b5477ce..19d5ded19f 100644 --- a/sysdeps/unix/sysv/linux/msgctl.c +++ b/sysdeps/unix/sysv/linux/msgctl.c @@ -23,11 +23,15 @@ #include <errno.h> #ifndef DEFAULT_VERSION -# define DEFAULT_VERSION GLIBC_2_2 +# ifndef __ASSUME_SYSVIPC_BROKEN_MODE_T +# define DEFAULT_VERSION GLIBC_2_2 +# else +# define DEFAULT_VERSION GLIBC_2_31 +# endif #endif -int -__new_msgctl (int msqid, int cmd, struct msqid_ds *buf) +static int +msgctl_syscall (int msqid, int cmd, struct msqid_ds *buf) { #ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS return INLINE_SYSCALL_CALL (msgctl, msqid, cmd | __IPC_64, buf); @@ -36,8 +40,54 @@ __new_msgctl (int msqid, int cmd, struct msqid_ds *buf) buf); #endif } + +int +__new_msgctl (int msqid, int cmd, struct msqid_ds *buf) +{ + /* POSIX states ipc_perm mode should have type of mode_t. */ + _Static_assert (sizeof ((struct msqid_ds){0}.msg_perm.mode) + == sizeof (mode_t), + "sizeof (msqid_ds.msg_perm.mode) != sizeof (mode_t)"); + +#ifdef __ASSUME_SYSVIPC_BROKEN_MODE_T + struct msqid_ds tmpds; + if (cmd == IPC_SET) + { + tmpds = *buf; + tmpds.msg_perm.mode *= 0x10000U; + buf = &tmpds; + } +#endif + + int ret = msgctl_syscall (msqid, cmd, buf); + +#ifdef __ASSUME_SYSVIPC_BROKEN_MODE_T + if (ret >= 0) + { + switch (cmd) + { + case IPC_STAT: + case MSG_STAT: + case MSG_STAT_ANY: + buf->msg_perm.mode >>= 16; + } + } +#endif + + return ret; +} versioned_symbol (libc, __new_msgctl, msgctl, DEFAULT_VERSION); +#if defined __ASSUME_SYSVIPC_BROKEN_MODE_T \ + && SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_31) +int +attribute_compat_text_section +__msgctl_mode16 (int msqid, int cmd, struct msqid_ds *buf) +{ + return msgctl_syscall (msqid, cmd, buf); +} +compat_symbol (libc, __msgctl_mode16, msgctl, GLIBC_2_2); +#endif #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2) struct __old_msqid_ds |