seccomp_load(3)

1seccomp_load(3)            libseccomp Documentation            seccomp_load(3)
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NAME

6       seccomp_load - Load the current seccomp filter into the kernel
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SYNOPSIS

9       #include <seccomp.h>
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11       typedef void * scmp_filter_ctx;
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13       int seccomp_load(scmp_filter_ctx ctx);
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15       Link with -lseccomp.
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DESCRIPTION

18       Loads  the seccomp filter provided by ctx into the kernel; if the func‐
19       tion succeeds the new seccomp filter will be active when  the  function
20       returns.
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22       As  it is possible to have multiple stacked seccomp filters for a given
23       task (defined as either a process or a thread), it is important to  re‐
24       member  that  each  of the filters loaded for a given task are executed
25       when a syscall is made and the "strictest" rule is the rule that is ap‐
26       plied.   In  the  case of seccomp, "strictest" is defined as the action
27       with  the  lowest  value  (e.g.   SCMP_ACT_KILL  is   "stricter"   than
28       SCMP_ACT_ALLOW).
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RETURN VALUE

31       Returns zero on success or one of the following error codes on failure:
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33       -ECANCELED
34              There was a system failure beyond the control of the library.
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36       -EFAULT
37              Internal libseccomp failure.
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39       -EINVAL
40              Invalid  input,  either the context or architecture token is in‐
41              valid.
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43       -ENOMEM
44              The library was unable to allocate enough memory.
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46       -ESRCH Unable to load the filter due to thread issues.
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48       If the SCMP_FLTATR_API_SYSRAWRC filter attribute is non-zero then addi‐
49       tional  error codes may be returned to the caller; these additional er‐
50       ror codes are the negative errno values returned by the system.  Unfor‐
51       tunately libseccomp can make no guarantees about these return values.
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EXAMPLES

54       #include <seccomp.h>
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56       int main(int argc, char *argv[])
57       {
58            int rc = -1;
59            scmp_filter_ctx ctx;
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61            ctx = seccomp_init(SCMP_ACT_KILL);
62            if (ctx == NULL)
63                 goto out;
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65            /* ... */
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67            rc = seccomp_load(ctx);
68            if (rc < 0)
69                 goto out;
70
71            /* ... */
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73       out:
74            seccomp_release(ctx);
75            return -rc;
76       }
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NOTES

79       While  the  seccomp  filter can be generated independent of the kernel,
80       kernel support is required to load and enforce the seccomp filter  gen‐
81       erated by libseccomp.
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83       The  libseccomp project site, with more information and the source code
84       repository,  can  be  found  at  https://github.com/seccomp/libseccomp.
85       This tool, as well as the libseccomp library, is currently under devel‐
86       opment, please report any bugs at the project site or directly  to  the
87       author.
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AUTHOR

90       Paul Moore <paul@paul-moore.com>
91