security_context_to_sid(9)

💅 security_context_to_sid(9)

okay so bestie, welcome to the Kernel API Manual ✨ this one's a little function from the kernel side of things, and honestly? she's giving "ID please" energy. let's get into it 🫶

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🌸 NAME 🌸

security_context_to_sid — get a SID for a given security context. literally that's her whole job 💖

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✨ SYNOPSIS ✨

int security_context_to_sid (const char *scontext , u32 scontext_len ,
u32 *sid , gfp_t gfp );

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🎀 ARGUMENTS 🎀

• scontext — the security context, bestie. it's a string, she's a string 💅
• scontext_len — how long that thing is, measured in bytes ✨
• sid — the security identifier, aka the SID 👑
• gfp — the context for the allocation, iykyk 🌈

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🦋 DESCRIPTION 🦋

so what she does is: she obtains a SID that's associated with the security context whose string representation is the one you passed in as scontext. match made in heaven, no cap 💖

and the returns? let's talk about the returns because they matter:

• returns -EINVAL if the context is invalid 🙈 (she said no thanks)
• returns -ENOMEM if there isn't enough memory available 😭 (she's broke, it happens)
• returns 0 on success ✨ (slay, we love a zero)

fr fr, check that return value. 0 is the only happy ending here 🫶

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⭐ SEE ALSO ⭐

kernel file ./security/selinux/ss/services.c — and then the whole friend group, like wow, huge roster:

security_compute_av(9), security_sid_to_context(9), security_sid_to_context_inval(9), security_context_to_sid_default(9), security_transition_sid(9), security_member_sid(9), security_change_sid(9), services_convert_context(9), security_load_policy(9), ocontext_to_sid(9), security_port_sid(9), security_ib_pkey_sid(9), security_ib_endport_sid(9), security_netif_sid(9), security_node_sid(9), __security_genfs_sid(9), security_genfs_sid(9), security_fs_use(9), security_net_peersid_resolve(9), security_policycap_supported(9), security_netlbl_cache_add(9), security_netlbl_secattr_to_sid(9), security_netlbl_sid_to_secattr(9), __security_read_policy(9), security_read_policy(9), security_read_state_kernel(9)

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🧚 okay and finally, the sign-off corner: this cutie lives at ./security/selinux/ss, she was dated October 2026, and her name is security_context_to_sid(9). periodt 💜🌸