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Documentation is licensed under LGPL-2.1-or-later. Scripts are MIT to facilitate reuse. Examples are relicensed to CC0-1.0 to maximise copy-and-paste for users, with permission from authors.
28 lines
620 B
C
28 lines
620 B
C
/* SPDX-License-Identifier: CC0-1.0 */
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#include <poll.h>
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#include <time.h>
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#include <systemd/sd-journal.h>
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int wait_for_changes(sd_journal *j) {
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uint64_t t;
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int msec;
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struct pollfd pollfd;
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sd_journal_get_timeout(j, &t);
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if (t == (uint64_t) -1)
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msec = -1;
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else {
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struct timespec ts;
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uint64_t n;
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clock_gettime(CLOCK_MONOTONIC, &ts);
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n = (uint64_t) ts.tv_sec * 1000000 + ts.tv_nsec / 1000;
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msec = t > n ? (int) ((t - n + 999) / 1000) : 0;
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}
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pollfd.fd = sd_journal_get_fd(j);
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pollfd.events = sd_journal_get_events(j);
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poll(&pollfd, 1, msec);
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return sd_journal_process(j);
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}
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