mirror of
https://github.com/troglobit/finit.git
synced 2026-09-30 13:02:37 +07:00
Joachim Wiberg
0a269f3298
Finit had no way to answer the question every service manager gets asked: what is running, and change it. D-Bus is how the rest of userspace asks, but linking libdbus, sd-bus or GIO into PID 1 buys a dependency, an allocator and a main loop we do not control. So libink: the wire format, an object tree, and a bus of Finit's own at /run/finit/bus, gated like INIT_SOCKET. It speaks the standard org.freedesktop.DBus, .Peer, .Introspectable interfaces, and Finit's own Manager1, Service1 and Cond1 on top. Methods that change something are marked privileged and answered only for a caller the kernel vouched for, via SO_PEERCRED. Server and client both, since initctl is the first thing that needs to talk to it, and its Start/Stop/Restart/Reload now go over the bus rather than the legacy socket. Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
44 lines
841 B
C
44 lines
841 B
C
/* libink — D-Bus object-path encoding for arbitrary identifiers.
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*
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* Copyright (c) 2026 Joachim Wiberg <troglobit@gmail.com>
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* SPDX-License-Identifier: MIT
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*/
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#include <stddef.h>
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#include "path.h"
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static int is_safe(unsigned char c)
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{
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return (c >= 'A' && c <= 'Z')
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|| (c >= 'a' && c <= 'z')
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|| (c >= '0' && c <= '9');
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}
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int link_path_encode(const char *in, char *out, size_t outsz)
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{
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static const char hex[] = "0123456789abcdef";
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size_t off = 0;
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if (!in || !out || outsz == 0)
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return -1;
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for (; *in; in++) {
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unsigned char c = (unsigned char)*in;
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if (is_safe(c)) {
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if (off + 1 >= outsz)
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return -1;
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out[off++] = (char)c;
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} else {
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if (off + 3 >= outsz)
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return -1;
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out[off++] = '_';
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out[off++] = hex[c >> 4];
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out[off++] = hex[c & 0xf];
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}
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}
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out[off] = '\0';
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return (int)off;
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}
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