11a1589223
Files which are installed as-is (any .service and other unit files, .conf files, .policy files, etc), are left as is. My assumption is that SPDX identifiers are not yet that well known, so it's better to retain the extended header to avoid any doubt. I also kept any copyright lines. We can probably remove them, but it'd nice to obtain explicit acks from all involved authors before doing that.
71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2014 Ivan Shapovalov
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***/
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#include <errno.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include "alloc-util.h"
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#include "fileio.h"
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#include "log.h"
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#include "util.h"
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int main(int argc, char *argv[]) {
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struct stat st;
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const char *device;
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_cleanup_free_ char *major_minor = NULL;
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int r;
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if (argc != 2) {
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log_error("This program expects one argument.");
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return EXIT_FAILURE;
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}
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log_set_target(LOG_TARGET_AUTO);
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log_parse_environment();
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log_open();
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umask(0022);
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/* Refuse to run unless we are in an initrd() */
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if (!in_initrd())
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return EXIT_SUCCESS;
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device = argv[1];
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if (stat(device, &st) < 0) {
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log_error_errno(errno, "Failed to stat '%s': %m", device);
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return EXIT_FAILURE;
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}
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if (!S_ISBLK(st.st_mode)) {
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log_error("Resume device '%s' is not a block device.", device);
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return EXIT_FAILURE;
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}
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if (asprintf(&major_minor, "%d:%d", major(st.st_rdev), minor(st.st_rdev)) < 0) {
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log_oom();
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return EXIT_FAILURE;
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}
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r = write_string_file("/sys/power/resume", major_minor, WRITE_STRING_FILE_CREATE);
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if (r < 0) {
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log_error_errno(r, "Failed to write '%s' to /sys/power/resume: %m", major_minor);
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return EXIT_FAILURE;
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}
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/*
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* The write above shall not return.
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*
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* However, failed resume is a normal condition (may mean that there is
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* no hibernation image).
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*/
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log_info("Could not resume from '%s' (%s).", device, major_minor);
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return EXIT_SUCCESS;
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}
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