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This interface allows to obtain the associated process ID from the
process file descriptor. It is done by parsing the procps fdinfo
information. Its prototype is:
pid_t pidfd_getpid (int fd)
It returns the associated pid or -1 in case of an error and sets the
errno accordingly. The possible errno values are those from open, read,
and close (used on procps parsing), along with:
- EBADF if the FD is negative, does not have a PID associated, or if
the fdinfo fields contain a value larger than pid_t.
- EREMOTE if the PID is in a separate namespace.
- ESRCH if the process is already terminated.
Checked on x86_64-linux-gnu on Linux 4.15 (no CLONE_PIDFD or waitid
support), Linux 5.4 (full support), and Linux 6.2.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
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| .. | ||
| n32 | ||
| n64 | ||
| configure | ||
| configure.ac | ||
| fxstat64.c | ||
| fxstatat64.c | ||
| fxstatat.c | ||
| getdents64.c | ||
| ipc_priv.h | ||
| kstat_cp.h | ||
| ldd-rewrite.sed | ||
| libBrokenLocale.abilist | ||
| libcrypt.abilist | ||
| libdl.abilist | ||
| libm.abilist | ||
| libnsl.abilist | ||
| libpthread.abilist | ||
| libthread_db.abilist | ||
| libutil.abilist | ||
| lxstat64.c | ||
| Makefile | ||
| msgctl.c | ||
| semctl.c | ||
| shmctl.c | ||
| syscall.S | ||
| sysdep.h | ||
| xstat64.c | ||