seccomp_syscall_resolve_namlibseccomp Documentaseccomp_syscall_resolve_name(3)NAME
seccomp_syscall_resolve_name - Resolve a syscall name
SYNOPSIS
#include <seccomp.h>
int seccomp_syscall_resolve_name(const char *name);
int seccomp_syscall_resolve_name_arch(uint32_t arch_token,
const char *name);
char *seccomp_syscall_resolve_num_arch(uint32_t arch_token, int num);
Link with -lseccomp.
DESCRIPTION
The seccomp_syscall_resolve_name() and sec‐
comp_syscall_resolve_name_arch() functions resolve the commonly used
syscall name to the syscall number used by the kernel and the rest of
the libseccomp API. The seccomp_syscall_resolve_num_arch() function
resolves the syscall number used by the kernel to the commonly used
syscall name.
The caller is responsible for freeing the returned string from sec‐
comp_syscall_resolve_num_arch().
RETURN VALUE
In the case of seccomp_syscall_resolve_name() and sec‐
comp_syscall_resolve_name_arch() the associated syscall number is
returned, with the negative pseudo syscall number being returned in
cases where the given syscall does not exist for the architeture. The
value __NR_SCMP_ERROR is returned in case of error. In all cases, the
return value is suitable for use in any libseccomp API function which
requires the syscall number, examples include seccomp_rule_add() and
seccomp_rule_add_exact().
In the case of seccomp_syscall_resolve_num_arch() the associated
syscall name is returned and it remains the callers responsibility to
free the returned string via free(3).
EXAMPLES
#include <seccomp.h>
int main(int argc, char *argv[])
{
int rc = -1;
scmp_filter_ctx ctx;
ctx = seccomp_init(SCMP_ACT_KILL);
if (ctx == NULL)
goto out;
/* ... */
rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW,
seccomp_syscall_resolve_name("open"), 0);
if (rc < 0)
goto out;
/* ... */
rc = seccomp_load(ctx);
if (rc < 0)
goto out;
/* ... */
out:
seccomp_release(ctx);
return -rc;
}
NOTES
While the seccomp filter can be generated independent of the kernel,
kernel support is required to load and enforce the seccomp filter gen‐
erated by libseccomp.
The libseccomp project site, with more information and the source code
repository, can be found at http://libseccomp.sf.net. This library is
currently under development, please report any bugs at the project site
or directly to the author.
AUTHOR
Paul Moore <paul@paul-moore.com>
SEE ALSOseccomp_rule_add(3), seccomp_rule_add_exact(3)paul@paul-moore.com 7 January 2013 seccomp_syscall_resolve_name(3)
