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missing: define new pidfd syscalls

This commit is contained in:
Lennart Poettering 2019-10-25 16:06:06 +02:00
parent 5a795bff38
commit 5f152f43d0
2 changed files with 46 additions and 0 deletions
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8
meson.build
View File

@ -517,6 +517,14 @@ foreach ident : [
#include <unistd.h>'''],
['get_mempolicy', '''#include <stdlib.h>
#include <unistd.h>'''],
['pidfd_send_signal', '''#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <sys/wait.h>'''],
['pidfd_open', '''#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <sys/wait.h>'''],
]
have = cc.has_function(ident[0], prefix : ident[1], args : '-D_GNU_SOURCE')

38
src/basic/missing_syscall.h
View File

@ -5,8 +5,10 @@
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#ifdef ARCH_MIPS
@ -524,3 +526,39 @@ static inline long missing_get_mempolicy(int *mode, unsigned long *nodemask,
#define get_mempolicy missing_get_mempolicy
#endif
#if !HAVE_PIDFD_OPEN
/* may be (invalid) negative number due to libseccomp, see PR 13319 */
# if ! (defined __NR_pidfd_open && __NR_pidfd_open > 0)
# if defined __NR_pidfd_open
# undef __NR_pidfd_open
# endif
# define __NR_pidfd_open 434
#endif
static inline int pidfd_open(pid_t pid, unsigned flags) {
#ifdef __NR_pidfd_open
return syscall(__NR_pidfd_open, pid, flags);
#else
errno = ENOSYS;
return -1;
#endif
}
#endif
#if !HAVE_PIDFD_SEND_SIGNAL
/* may be (invalid) negative number due to libseccomp, see PR 13319 */
# if ! (defined __NR_pidfd_send_signal && __NR_pidfd_send_signal > 0)
# if defined __NR_pidfd_send_signal
# undef __NR_pidfd_send_signal
# endif
# define __NR_pidfd_send_signal 424
#endif
static inline int pidfd_send_signal(int fd, int sig, siginfo_t *info, unsigned flags) {
#ifdef __NR_pidfd_open
return syscall(__NR_pidfd_send_signal, fd, sig, info, flags);
#else
errno = ENOSYS;
return -1;
#endif
}
#endif