mirror of
https://github.com/morgan9e/systemd
synced 2026-04-14 16:37:19 +09:00
543a48b653
Then, move syscall definitions to the wrapper, and prototypes are moved to relevant headers. This also adds checks for add_key() and request_key(), as one day glibc may be going to add some of them separatedly. The check for fspick in meson.build is dropped, as it is currently unused in our code. This also moves - basic/missing_bpf.h -> include/override/linux/bpf.h, - basic/missing_keyctl.h -> include/override/linux/keyctl.h.
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include "alloc-util.h"
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#include "keyring-util.h"
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#include "log.h"
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int keyring_read(key_serial_t serial, void **ret, size_t *ret_size) {
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size_t bufsize = 100;
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for (;;) {
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_cleanup_(erase_and_freep) uint8_t *buf = NULL;
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long n;
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buf = new(uint8_t, bufsize + 1);
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if (!buf)
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return -ENOMEM;
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n = keyctl(KEYCTL_READ, (unsigned long) serial, (unsigned long) buf, (unsigned long) bufsize, 0);
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if (n < 0)
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return -errno;
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if ((size_t) n <= bufsize) {
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buf[n] = 0; /* NUL terminate, just in case */
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if (ret)
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*ret = TAKE_PTR(buf);
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if (ret_size)
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*ret_size = n;
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return 0;
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}
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bufsize = (size_t) n;
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}
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}
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int keyring_describe(key_serial_t serial, char **ret) {
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_cleanup_free_ char *tuple = NULL;
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size_t sz = 64;
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int c = -1; /* Workaround for maybe-uninitialized false positive due to missing_syscall indirection */
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assert(ret);
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for (;;) {
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tuple = new(char, sz);
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if (!tuple)
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return log_oom_debug();
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c = keyctl(KEYCTL_DESCRIBE, serial, (unsigned long) tuple, c, 0);
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if (c < 0)
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return log_debug_errno(errno, "Failed to describe key id %d: %m", serial);
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if ((size_t) c <= sz)
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break;
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sz = c;
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free(tuple);
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}
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/* The kernel returns a final NUL in the string, verify that. */
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assert(tuple[c-1] == 0);
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*ret = TAKE_PTR(tuple);
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return 0;
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}
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