diff options
Diffstat (limited to 'doc/man/man3/seccomp_load.3')
| -rw-r--r-- | doc/man/man3/seccomp_load.3 | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/doc/man/man3/seccomp_load.3 b/doc/man/man3/seccomp_load.3 new file mode 100644 index 0000000..729f73e --- /dev/null +++ b/doc/man/man3/seccomp_load.3 @@ -0,0 +1,112 @@ +.TH "seccomp_load" 3 "30 May 2020" "paul@paul-moore.com" "libseccomp Documentation" +.\" ////////////////////////////////////////////////////////////////////////// +.SH NAME +.\" ////////////////////////////////////////////////////////////////////////// +seccomp_load \- Load the current seccomp filter into the kernel +.\" ////////////////////////////////////////////////////////////////////////// +.SH SYNOPSIS +.\" ////////////////////////////////////////////////////////////////////////// +.nf +.B #include <seccomp.h> +.sp +.B typedef void * scmp_filter_ctx; +.sp +.BI "int seccomp_load(scmp_filter_ctx " ctx ");" +.sp +Link with \fI\-lseccomp\fP. +.fi +.\" ////////////////////////////////////////////////////////////////////////// +.SH DESCRIPTION +.\" ////////////////////////////////////////////////////////////////////////// +.P +Loads the seccomp filter provided by +.I ctx +into the kernel; if the function +succeeds the new seccomp filter will be active when the function returns. +.P +As it is possible to have multiple stacked seccomp filters for a given task +(defined as either a process or a thread), it is important to remember that +each of the filters loaded for a given task are executed when a syscall is +made and the "strictest" rule is the rule that is applied. In the case of +seccomp, "strictest" is defined as the action with the lowest value (e.g. +.I SCMP_ACT_KILL +is "stricter" than +.IR SCMP_ACT_ALLOW ). +.\" ////////////////////////////////////////////////////////////////////////// +.SH RETURN VALUE +.\" ////////////////////////////////////////////////////////////////////////// +Returns zero on success or one of the following error codes on failure: +.TP +.B -ECANCELED +There was a system failure beyond the control of the library. +.TP +.B -EFAULT +Internal libseccomp failure. +.TP +.B -EINVAL +Invalid input, either the context or architecture token is invalid. +.TP +.B -ENOMEM +The library was unable to allocate enough memory. +.TP +.B -ESRCH +Unable to load the filter due to thread issues. +.P +If the \fISCMP_FLTATR_API_SYSRAWRC\fP filter attribute is non-zero then +additional error codes may be returned to the caller; these additional error +codes are the negative \fIerrno\fP values returned by the system. Unfortunately +libseccomp can make no guarantees about these return values. +.\" ////////////////////////////////////////////////////////////////////////// +.SH EXAMPLES +.\" ////////////////////////////////////////////////////////////////////////// +.nf +#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_load(ctx); + if (rc < 0) + goto out; + + /* ... */ + +out: + seccomp_release(ctx); + return \-rc; +} +.fi +.\" ////////////////////////////////////////////////////////////////////////// +.SH NOTES +.\" ////////////////////////////////////////////////////////////////////////// +.P +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. +.P +The libseccomp project site, with more information and the source code +repository, can be found at https://github.com/seccomp/libseccomp. This tool, +as well as the libseccomp library, is currently under development, please +report any bugs at the project site or directly to the author. +.\" ////////////////////////////////////////////////////////////////////////// +.SH AUTHOR +.\" ////////////////////////////////////////////////////////////////////////// +Paul Moore <paul@paul-moore.com> +.\" ////////////////////////////////////////////////////////////////////////// +.SH SEE ALSO +.\" ////////////////////////////////////////////////////////////////////////// +.BR seccomp_init (3), +.BR seccomp_reset (3), +.BR seccomp_release (3), +.BR seccomp_rule_add (3), +.BR seccomp_rule_add_exact (3) + + |