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seccomp_syscall_resolve_name

Section: libseccomp Documentation (3)
Updated: 7 January 2013
Index Return to Main Contents
 

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 generated 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)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
EXAMPLES
NOTES
AUTHOR
SEE ALSO


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