97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/*
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* No copyright is claimed. This code is in the public domain; do with
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* it what you wish.
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*/
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#ifndef UTIL_LINUX_PIDFD_UTILS
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#define UTIL_LINUX_PIDFD_UTILS
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#include <sys/types.h>
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#include <sys/wait.h>
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#ifdef HAVE_SYS_PIDFD_H
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# include <sys/pidfd.h>
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#endif
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/*
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* pidfd ioctls
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*
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* All added by commit to kernel 6.11, commit 5b08bd408534bfb3a7cf5778da5b27d4e4fffe12.
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*/
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#ifndef PIDFS_IOCTL_MAGIC
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# define PIDFS_IOCTL_MAGIC 0xFF
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# define PIDFD_GET_CGROUP_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 1)
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# define PIDFD_GET_IPC_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 2)
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# define PIDFD_GET_MNT_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 3)
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# define PIDFD_GET_NET_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 4)
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# define PIDFD_GET_PID_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 5)
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# define PIDFD_GET_PID_FOR_CHILDREN_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 6)
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# define PIDFD_GET_TIME_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 7)
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# define PIDFD_GET_TIME_FOR_CHILDREN_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 8)
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# define PIDFD_GET_USER_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 9)
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# define PIDFD_GET_UTS_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 10)
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#endif
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#ifdef HAVE_SYS_SYSCALL_H
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# include <sys/syscall.h>
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# include <unistd.h>
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# if !defined(HAVE_PIDFD_SEND_SIGNAL) && defined(SYS_pidfd_send_signal)
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static inline int pidfd_send_signal(int pidfd, int sig, siginfo_t *info,
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unsigned int flags)
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{
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return syscall(SYS_pidfd_send_signal, pidfd, sig, info, flags);
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}
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# endif
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# if !defined(HAVE_PIDFD_OPEN) && defined(SYS_pidfd_open)
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static inline int pidfd_open(pid_t pid, unsigned int flags)
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{
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return syscall(SYS_pidfd_open, pid, flags);
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}
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# endif
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# if !defined(HAVE_PIDFD_GETFD) && defined(SYS_pidfd_getfd)
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static inline int pidfd_getfd(int pidfd, int targetfd, unsigned int flags)
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{
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return syscall(SYS_pidfd_getfd, pidfd, targetfd, flags);
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}
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# endif
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#endif /* HAVE_SYS_SYSCALL_H */
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/*
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* Dummy fallbacks for cases when #ifdef HAVE_PIDFD_* makes the code too complex.
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*/
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#if !defined(HAVE_PIDFD_SEND_SIGNAL) && !defined(SYS_pidfd_send_signal)
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static inline int pidfd_send_signal(int pidfd __attribute__((unused)),
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int sig __attribute__((unused)),
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siginfo_t *info __attribute__((unused)),
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unsigned int flags __attribute__((unused)))
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{
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errno = ENOSYS;
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return -1;
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}
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#endif
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#if !defined(HAVE_PIDFD_OPEN) && !defined(SYS_pidfd_open)
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static inline int pidfd_open(pid_t pid __attribute__((unused)),
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unsigned int flags __attribute__((unused)))
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{
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errno = ENOSYS;
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return -1;
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}
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#endif
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# if !defined(HAVE_PIDFD_GETFD) && !defined(SYS_pidfd_getfd)
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static inline int pidfd_getfd(int pidfd __attribute__((unused)),
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int targetfd __attribute__((unused)),
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unsigned int flags __attribute__((unused)))
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{
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errno = ENOSYS;
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return -1;
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}
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#endif
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#endif /* UTIL_LINUX_PIDFD_UTILS */
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