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seccomp_syscall_resolve_name(3) [centos man page]

seccomp_syscall_resolve_name(3) 			     libseccomp Documentation				   seccomp_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 seccomp_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 seccomp_syscall_resolve_num_arch().

RETURN VALUE

       In  the	case of seccomp_syscall_resolve_name() and seccomp_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 ALSO

       seccomp_rule_add(3), seccomp_rule_add_exact(3)

paul@paul-moore.com						  7 January 2013				   seccomp_syscall_resolve_name(3)

Check Out this Related Man Page

seccomp_export_bpf(3)					     libseccomp Documentation					     seccomp_export_bpf(3)

NAME

       seccomp_export_bpf, seccomp_export_pfc - Export the seccomp filter

SYNOPSIS

       #include <seccomp.h>

       typedef void * scmp_filter_ctx;

       int seccomp_export_bpf(const scmp_filter_ctx ctx, int fd);
       int seccomp_export_pfc(const scmp_filter_ctx ctx, int fd);

       Link with -lseccomp.

DESCRIPTION

       The  seccomp_export_bpf()  and  seccomp_export_pfc() functions generate and output the current seccomp filter in either BPF (Berkley Packet
       Filter) or PFC (Pseudo Filter Code).  The output of seccomp_export_bpf() is suitable for loading into the kernel, while the output of  sec-
       comp_export_pfc()  is  human  readable and is intended primarily as a debugging tool for developers using libseccomp.  Both functions write
       the filter to the fd file descriptor.

       The filter context ctx is the value returned by the call to seccomp_init(3).

       While the two output formats are guaranteed to be functionally equivalent for the given seccomp filter configuration, the  filter  instruc-
       tions, and their ordering, are not guaranteed to be the same in both the BPF and PFC formats.

RETURN VALUE

       Returns zero on success, negative errno values on failure.

EXAMPLES

       #include <seccomp.h>

       int main(int argc, char *argv[])
       {
	    int rc = -1;
	    scmp_filter_ctx ctx;
	    int filter_fd;

	    ctx = seccomp_init(SCMP_ACT_KILL);
	    if (ctx == NULL)
		 goto out;

	    /* ... */

	    filter_fd = open("/tmp/seccomp_filter.bpf", O_WRONLY);
	    if (filter_fd == -1) {
		 rc = -errno;
		 goto out;
	    }

	    rc = seccomp_export_bpf(ctx, filter_fd);
	    if (rc < 0) {
		 close(filter_fd);
		 goto out;
	    }
	    close(filter_fd);

	    /* ... */

       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 ALSO

       seccomp_init(3), seccomp_release(3)

paul@paul-moore.com						   25 July 2012 					     seccomp_export_bpf(3)
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