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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
commit | b750101eb236130cf056c675997decbac904cc49 (patch) | |
tree | a5df1a06754bdd014cb975c051c83b01c9a97532 /src/hibernate-resume/hibernate-resume.c | |
parent | Initial commit. (diff) | |
download | systemd-upstream.tar.xz systemd-upstream.zip |
Adding upstream version 252.22.upstream/252.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/hibernate-resume/hibernate-resume.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/hibernate-resume/hibernate-resume.c b/src/hibernate-resume/hibernate-resume.c new file mode 100644 index 0000000..1c7d917 --- /dev/null +++ b/src/hibernate-resume/hibernate-resume.c @@ -0,0 +1,58 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <errno.h> +#include <stdio.h> +#include <sys/stat.h> + +#include "alloc-util.h" +#include "devnum-util.h" +#include "fileio.h" +#include "log.h" +#include "util.h" + +int main(int argc, char *argv[]) { + struct stat st; + const char *device; + int r; + + if (argc != 2) { + log_error("This program expects one argument."); + return EXIT_FAILURE; + } + + log_setup(); + + umask(0022); + + /* Refuse to run unless we are in an initrd() */ + if (!in_initrd()) + return EXIT_SUCCESS; + + device = argv[1]; + + if (stat(device, &st) < 0) { + log_error_errno(errno, "Failed to stat '%s': %m", device); + return EXIT_FAILURE; + } + + if (!S_ISBLK(st.st_mode)) { + log_error("Resume device '%s' is not a block device.", device); + return EXIT_FAILURE; + } + + r = write_string_file("/sys/power/resume", FORMAT_DEVNUM(st.st_rdev), WRITE_STRING_FILE_DISABLE_BUFFER); + if (r < 0) { + log_error_errno(r, "Failed to write '" DEVNUM_FORMAT_STR "' to /sys/power/resume: %m", DEVNUM_FORMAT_VAL(st.st_rdev)); + return EXIT_FAILURE; + } + + /* + * The write above shall not return. + * + * However, failed resume is a normal condition (may mean that there is + * no hibernation image). + */ + + log_info("Could not resume from '%s' (" DEVNUM_FORMAT_STR ").", device, DEVNUM_FORMAT_VAL(st.st_rdev)); + return EXIT_SUCCESS; +} |