ausyscall(8)


NAME

   ausyscall - a program that allows mapping syscall names and numbers

SYNOPSIS

   ausyscall [arch] name | number | --dump | --exact

DESCRIPTION

   ausyscall is a program that prints out the mapping from syscall name to
   number and reverse for  the  given  arch.  The  arch  can  be  anything
   returned  by  `uname -m`. If arch is not given, the program will take a
   guess based on the running image. You may  give  the  syscall  name  or
   number and it will find the opposite. You can also dump the whole table
   with the --dump option. By default a syscall  name  lookup  will  be  a
   substring  match  meaning  that it will try to match all occurrences of
   the given name with syscalls. So giving a name of chown will match both
   fchown  and  chown as any other syscall with chown in its name. If this
   behavior is not desired, pass the --exact flag and it will do an  exact
   string match.

   This program can be used to verify syscall numbers on a biarch platform
   for rule optimization. For example, suppose you had an auditctl rule:

   -a always, exit -S open -F exit=-EPERM -k fail-open

   If you wanted to verify that both 32  and  64  bit  programs  would  be
   audited,  run  "ausyscall  i386 open" and then "ausyscall x86_64 open".
   Look at the returned numbers. If they are different, you will  have  to
   write two auditctl rules to get complete coverage.

   -a always,exit -F arch=b32 -S open -F exit=-EPERM -k fail-open
   -a always,exit -F arch=b64 -S open -F exit=-EPERM -k fail-open

   For  more information about a specific syscall, use the man program and
   pass the number 2 as an argument to make sure that you get the  syscall
   information  rather  than a shell script program or glibc function call
   of the same name. For example, if you wanted to learn  about  the  open
   syscall, type: man 2 open.

OPTIONS

   --dump Print all syscalls for the given arch

   --exact
          Instead  of  doing a partial word match, match the given syscall
          name exactly.

SEE ALSO

   ausearch(8), auditctl(8).

AUTHOR

   Steve Grubb





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