diff options
Diffstat (limited to 'src')
| l--------- | src/hibernate-resume/Makefile | 1 | ||||
| -rw-r--r-- | src/hibernate-resume/hibernate-resume.c | 81 |
2 files changed, 82 insertions, 0 deletions
diff --git a/src/hibernate-resume/Makefile b/src/hibernate-resume/Makefile new file mode 120000 index 0000000000..d0b0e8e008 --- /dev/null +++ b/src/hibernate-resume/Makefile @@ -0,0 +1 @@ +../Makefile
\ No newline at end of file diff --git a/src/hibernate-resume/hibernate-resume.c b/src/hibernate-resume/hibernate-resume.c new file mode 100644 index 0000000000..8f68f81f9e --- /dev/null +++ b/src/hibernate-resume/hibernate-resume.c @@ -0,0 +1,81 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + This file is part of systemd. + + Copyright 2014 Ivan Shapovalov + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <stdio.h> +#include <errno.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <unistd.h> + +#include "log.h" +#include "util.h" +#include "fileio.h" + +int main(int argc, char *argv[]) { + struct stat st; + const char *device; + _cleanup_free_ char *major_minor = NULL; + int r; + + if (argc != 2) { + log_error("This program expects one argument."); + return EXIT_FAILURE; + } + + log_set_target(LOG_TARGET_AUTO); + log_parse_environment(); + log_open(); + + umask(0022); + + device = argv[1]; + + if (stat(device, &st) < 0) { + log_error("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; + } + + if (asprintf(&major_minor, "%d:%d", major(st.st_rdev), minor(st.st_rdev)) < 0) { + log_oom(); + return EXIT_FAILURE; + } + + r = write_string_file("/sys/power/resume", major_minor); + if (r < 0) { + log_error("Failed to write '%s' to /sys/power/resume: %s", major_minor, strerror(-r)); + 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' (%s).", device, major_minor); + return EXIT_SUCCESS; +} |