| """ |
| DO NOT import this file directly - import client/bin/utils.py, |
| which will mix this in |
| |
| Convenience functions for use by tests or whomever. |
| |
| Note that this file is mixed in by utils.py - note very carefully the |
| precedence order defined there |
| """ |
| import os, shutil, sys, signal, commands, pickle, glob, statvfs |
| import math, re, string, fnmatch, logging |
| from autotest_lib.client.common_lib import error, utils, magic |
| |
| |
| def grep(pattern, file): |
| """ |
| This is mainly to fix the return code inversion from grep |
| Also handles compressed files. |
| |
| returns 1 if the pattern is present in the file, 0 if not. |
| """ |
| command = 'grep "%s" > /dev/null' % pattern |
| ret = cat_file_to_cmd(file, command, ignore_status=True) |
| return not ret |
| |
| |
| def difflist(list1, list2): |
| """returns items in list2 that are not in list1""" |
| diff = []; |
| for x in list2: |
| if x not in list1: |
| diff.append(x) |
| return diff |
| |
| |
| def cat_file_to_cmd(file, command, ignore_status=0, return_output=False): |
| """ |
| equivalent to 'cat file | command' but knows to use |
| zcat or bzcat if appropriate |
| """ |
| if not os.path.isfile(file): |
| raise NameError('invalid file %s to cat to command %s' |
| % (file, command)) |
| |
| if return_output: |
| run_cmd = utils.system_output |
| else: |
| run_cmd = utils.system |
| |
| if magic.guess_type(file) == 'application/x-bzip2': |
| cat = 'bzcat' |
| elif magic.guess_type(file) == 'application/x-gzip': |
| cat = 'zcat' |
| else: |
| cat = 'cat' |
| return run_cmd('%s %s | %s' % (cat, file, command), |
| ignore_status=ignore_status) |
| |
| |
| def extract_tarball_to_dir(tarball, dir): |
| """ |
| Extract a tarball to a specified directory name instead of whatever |
| the top level of a tarball is - useful for versioned directory names, etc |
| """ |
| if os.path.exists(dir): |
| if os.path.isdir(dir): |
| shutil.rmtree(dir) |
| else: |
| os.remove(dir) |
| pwd = os.getcwd() |
| os.chdir(os.path.dirname(os.path.abspath(dir))) |
| newdir = extract_tarball(tarball) |
| os.rename(newdir, dir) |
| os.chdir(pwd) |
| |
| |
| def extract_tarball(tarball): |
| """Returns the directory extracted by the tarball.""" |
| extracted = cat_file_to_cmd(tarball, 'tar xvf - 2>/dev/null', |
| return_output=True).splitlines() |
| |
| dir = None |
| |
| for line in extracted: |
| line = re.sub(r'^./', '', line) |
| if not line or line == '.': |
| continue |
| topdir = line.split('/')[0] |
| if os.path.isdir(topdir): |
| if dir: |
| assert(dir == topdir) |
| else: |
| dir = topdir |
| if dir: |
| return dir |
| else: |
| raise NameError('extracting tarball produced no dir') |
| |
| |
| def hash_file(filename, size=None, method="md5"): |
| """ |
| Calculate the hash of filename. |
| If size is not None, limit to first size bytes. |
| Throw exception if something is wrong with filename. |
| Can be also implemented with bash one-liner (assuming size%1024==0): |
| dd if=filename bs=1024 count=size/1024 | sha1sum - |
| |
| @param filename: Path of the file that will have its hash calculated. |
| @param method: Method used to calculate the hash. Supported methods: |
| * md5 |
| * sha1 |
| @returns: Hash of the file, if something goes wrong, return None. |
| """ |
| chunksize = 4096 |
| fsize = os.path.getsize(filename) |
| |
| if not size or size > fsize: |
| size = fsize |
| f = open(filename, 'rb') |
| |
| try: |
| hash = utils.hash(method) |
| except ValueError: |
| logging.error("Unknown hash type %s, returning None" % method) |
| |
| while size > 0: |
| if chunksize > size: |
| chunksize = size |
| data = f.read(chunksize) |
| if len(data) == 0: |
| logging.debug("Nothing left to read but size=%d" % size) |
| break |
| hash.update(data) |
| size -= len(data) |
| f.close() |
| return hash.hexdigest() |
| |
| |
| def unmap_url_cache(cachedir, url, expected_hash, method="md5"): |
| """ |
| Downloads a file from a URL to a cache directory. If the file is already |
| at the expected position and has the expected hash, let's not download it |
| again. |
| |
| @param cachedir: Directory that might hold a copy of the file we want to |
| download. |
| @param url: URL for the file we want to download. |
| @param expected_hash: Hash string that we expect the file downloaded to |
| have. |
| @param method: Method used to calculate the hash string (md5, sha1). |
| """ |
| # Let's convert cachedir to a canonical path, if it's not already |
| cachedir = os.path.realpath(cachedir) |
| if not os.path.isdir(cachedir): |
| try: |
| os.makedirs(cachedir) |
| except: |
| raise ValueError('Could not create cache directory %s' % cachedir) |
| file_from_url = os.path.basename(url) |
| file_local_path = os.path.join(cachedir, file_from_url) |
| |
| file_hash = None |
| failure_counter = 0 |
| while not file_hash == expected_hash: |
| if os.path.isfile(file_local_path): |
| file_hash = hash_file(file_local_path, method) |
| if file_hash == expected_hash: |
| # File is already at the expected position and ready to go |
| src = file_from_url |
| else: |
| # Let's download the package again, it's corrupted... |
| logging.error("Seems that file %s is corrupted, trying to " |
| "download it again" % file_from_url) |
| src = url |
| failure_counter += 1 |
| else: |
| # File is not there, let's download it |
| src = url |
| if failure_counter > 1: |
| raise EnvironmentError("Consistently failed to download the " |
| "package %s. Aborting further download " |
| "attempts. This might mean either the " |
| "network connection has problems or the " |
| "expected hash string that was determined " |
| "for this file is wrong" % file_from_url) |
| file_path = utils.unmap_url(cachedir, src, cachedir) |
| |
| return file_path |
| |
| |
| def force_copy(src, dest): |
| """Replace dest with a new copy of src, even if it exists""" |
| if os.path.isfile(dest): |
| os.remove(dest) |
| if os.path.isdir(dest): |
| dest = os.path.join(dest, os.path.basename(src)) |
| shutil.copyfile(src, dest) |
| return dest |
| |
| |
| def force_link(src, dest): |
| """Link src to dest, overwriting it if it exists""" |
| return utils.system("ln -sf %s %s" % (src, dest)) |
| |
| |
| def file_contains_pattern(file, pattern): |
| """Return true if file contains the specified egrep pattern""" |
| if not os.path.isfile(file): |
| raise NameError('file %s does not exist' % file) |
| return not utils.system('egrep -q "' + pattern + '" ' + file, ignore_status=True) |
| |
| |
| def list_grep(list, pattern): |
| """True if any item in list matches the specified pattern.""" |
| compiled = re.compile(pattern) |
| for line in list: |
| match = compiled.search(line) |
| if (match): |
| return 1 |
| return 0 |
| |
| |
| def get_os_vendor(): |
| """Try to guess what's the os vendor |
| """ |
| if os.path.isfile('/etc/SuSE-release'): |
| return 'SUSE' |
| |
| issue = '/etc/issue' |
| |
| if not os.path.isfile(issue): |
| return 'Unknown' |
| |
| if file_contains_pattern(issue, 'Red Hat'): |
| return 'Red Hat' |
| elif file_contains_pattern(issue, 'Fedora'): |
| return 'Fedora Core' |
| elif file_contains_pattern(issue, 'SUSE'): |
| return 'SUSE' |
| elif file_contains_pattern(issue, 'Ubuntu'): |
| return 'Ubuntu' |
| elif file_contains_pattern(issue, 'Debian'): |
| return 'Debian' |
| else: |
| return 'Unknown' |
| |
| |
| def get_cc(): |
| try: |
| return os.environ['CC'] |
| except KeyError: |
| return 'gcc' |
| |
| |
| def get_vmlinux(): |
| """Return the full path to vmlinux |
| |
| Ahem. This is crap. Pray harder. Bad Martin. |
| """ |
| vmlinux = '/boot/vmlinux-%s' % utils.system_output('uname -r') |
| if os.path.isfile(vmlinux): |
| return vmlinux |
| vmlinux = '/lib/modules/%s/build/vmlinux' % utils.system_output('uname -r') |
| if os.path.isfile(vmlinux): |
| return vmlinux |
| return None |
| |
| |
| def get_systemmap(): |
| """Return the full path to System.map |
| |
| Ahem. This is crap. Pray harder. Bad Martin. |
| """ |
| map = '/boot/System.map-%s' % utils.system_output('uname -r') |
| if os.path.isfile(map): |
| return map |
| map = '/lib/modules/%s/build/System.map' % utils.system_output('uname -r') |
| if os.path.isfile(map): |
| return map |
| return None |
| |
| |
| def get_modules_dir(): |
| """Return the modules dir for the running kernel version""" |
| kernel_version = utils.system_output('uname -r') |
| return '/lib/modules/%s/kernel' % kernel_version |
| |
| |
| def get_cpu_arch(): |
| """Work out which CPU architecture we're running on""" |
| f = open('/proc/cpuinfo', 'r') |
| cpuinfo = f.readlines() |
| f.close() |
| if list_grep(cpuinfo, '^cpu.*(RS64|POWER3|Broadband Engine)'): |
| return 'power' |
| elif list_grep(cpuinfo, '^cpu.*POWER4'): |
| return 'power4' |
| elif list_grep(cpuinfo, '^cpu.*POWER5'): |
| return 'power5' |
| elif list_grep(cpuinfo, '^cpu.*POWER6'): |
| return 'power6' |
| elif list_grep(cpuinfo, '^cpu.*POWER7'): |
| return 'power7' |
| elif list_grep(cpuinfo, '^cpu.*PPC970'): |
| return 'power970' |
| elif list_grep(cpuinfo, 'ARM'): |
| return 'arm' |
| elif list_grep(cpuinfo, '^flags.*:.* lm .*'): |
| return 'x86_64' |
| else: |
| return 'i386' |
| |
| |
| def get_current_kernel_arch(): |
| """Get the machine architecture, now just a wrap of 'uname -m'.""" |
| return os.popen('uname -m').read().rstrip() |
| |
| |
| def get_file_arch(filename): |
| # -L means follow symlinks |
| file_data = utils.system_output('file -L ' + filename) |
| if file_data.count('80386'): |
| return 'i386' |
| return None |
| |
| |
| def count_cpus(): |
| """number of CPUs in the local machine according to /proc/cpuinfo""" |
| f = file('/proc/cpuinfo', 'r') |
| cpus = 0 |
| for line in f.readlines(): |
| if line.lower().startswith('processor'): |
| cpus += 1 |
| return cpus |
| |
| |
| # Returns total memory in kb |
| def read_from_meminfo(key): |
| meminfo = utils.system_output('grep %s /proc/meminfo' % key) |
| return int(re.search(r'\d+', meminfo).group(0)) |
| |
| |
| def memtotal(): |
| return read_from_meminfo('MemTotal') |
| |
| |
| def freememtotal(): |
| return read_from_meminfo('MemFree') |
| |
| |
| def rounded_memtotal(): |
| # Get total of all physical mem, in kbytes |
| usable_kbytes = memtotal() |
| # usable_kbytes is system's usable DRAM in kbytes, |
| # as reported by memtotal() from device /proc/meminfo memtotal |
| # after Linux deducts 1.5% to 5.1% for system table overhead |
| # Undo the unknown actual deduction by rounding up |
| # to next small multiple of a big power-of-two |
| # eg 12GB - 5.1% gets rounded back up to 12GB |
| mindeduct = 0.015 # 1.5 percent |
| maxdeduct = 0.055 # 5.5 percent |
| # deduction range 1.5% .. 5.5% supports physical mem sizes |
| # 6GB .. 12GB in steps of .5GB |
| # 12GB .. 24GB in steps of 1 GB |
| # 24GB .. 48GB in steps of 2 GB ... |
| # Finer granularity in physical mem sizes would require |
| # tighter spread between min and max possible deductions |
| |
| # increase mem size by at least min deduction, without rounding |
| min_kbytes = int(usable_kbytes / (1.0 - mindeduct)) |
| # increase mem size further by 2**n rounding, by 0..roundKb or more |
| round_kbytes = int(usable_kbytes / (1.0 - maxdeduct)) - min_kbytes |
| # find least binary roundup 2**n that covers worst-cast roundKb |
| mod2n = 1 << int(math.ceil(math.log(round_kbytes, 2))) |
| # have round_kbytes <= mod2n < round_kbytes*2 |
| # round min_kbytes up to next multiple of mod2n |
| phys_kbytes = min_kbytes + mod2n - 1 |
| phys_kbytes = phys_kbytes - (phys_kbytes % mod2n) # clear low bits |
| return phys_kbytes |
| |
| |
| def sysctl(key, value=None): |
| """Generic implementation of sysctl, to read and write. |
| |
| @param key: A location under /proc/sys |
| @param value: If not None, a value to write into the sysctl. |
| |
| @return The single-line sysctl value as a string. |
| """ |
| path = '/proc/sys/%s' % key |
| if value is not None: |
| utils.write_one_line(path, str(value)) |
| return utils.read_one_line(path) |
| |
| |
| def sysctl_kernel(key, value=None): |
| """(Very) partial implementation of sysctl, for kernel params""" |
| if value is not None: |
| # write |
| utils.write_one_line('/proc/sys/kernel/%s' % key, str(value)) |
| else: |
| # read |
| out = utils.read_one_line('/proc/sys/kernel/%s' % key) |
| return int(re.search(r'\d+', out).group(0)) |
| |
| |
| def _convert_exit_status(sts): |
| if os.WIFSIGNALED(sts): |
| return -os.WTERMSIG(sts) |
| elif os.WIFEXITED(sts): |
| return os.WEXITSTATUS(sts) |
| else: |
| # impossible? |
| raise RuntimeError("Unknown exit status %d!" % sts) |
| |
| |
| def where_art_thy_filehandles(): |
| """Dump the current list of filehandles""" |
| os.system("ls -l /proc/%d/fd >> /dev/tty" % os.getpid()) |
| |
| |
| def print_to_tty(string): |
| """Output string straight to the tty""" |
| open('/dev/tty', 'w').write(string + '\n') |
| |
| |
| def dump_object(object): |
| """Dump an object's attributes and methods |
| |
| kind of like dir() |
| """ |
| for item in object.__dict__.iteritems(): |
| print item |
| try: |
| (key,value) = item |
| dump_object(value) |
| except: |
| continue |
| |
| |
| def environ(env_key): |
| """return the requested environment variable, or '' if unset""" |
| if (os.environ.has_key(env_key)): |
| return os.environ[env_key] |
| else: |
| return '' |
| |
| |
| def prepend_path(newpath, oldpath): |
| """prepend newpath to oldpath""" |
| if (oldpath): |
| return newpath + ':' + oldpath |
| else: |
| return newpath |
| |
| |
| def append_path(oldpath, newpath): |
| """append newpath to oldpath""" |
| if (oldpath): |
| return oldpath + ':' + newpath |
| else: |
| return newpath |
| |
| |
| def avgtime_print(dir): |
| """ Calculate some benchmarking statistics. |
| Input is a directory containing a file called 'time'. |
| File contains one-per-line results of /usr/bin/time. |
| Output is average Elapsed, User, and System time in seconds, |
| and average CPU percentage. |
| """ |
| f = open(dir + "/time") |
| user = system = elapsed = cpu = count = 0 |
| r = re.compile('([\d\.]*)user ([\d\.]*)system (\d*):([\d\.]*)elapsed (\d*)%CPU') |
| for line in f.readlines(): |
| try: |
| s = r.match(line); |
| user += float(s.group(1)) |
| system += float(s.group(2)) |
| elapsed += (float(s.group(3)) * 60) + float(s.group(4)) |
| cpu += float(s.group(5)) |
| count += 1 |
| except: |
| raise ValueError("badly formatted times") |
| |
| f.close() |
| return "Elapsed: %0.2fs User: %0.2fs System: %0.2fs CPU: %0.0f%%" % \ |
| (elapsed/count, user/count, system/count, cpu/count) |
| |
| |
| def running_config(): |
| """ |
| Return path of config file of the currently running kernel |
| """ |
| version = utils.system_output('uname -r') |
| for config in ('/proc/config.gz', \ |
| '/boot/config-%s' % version, |
| '/lib/modules/%s/build/.config' % version): |
| if os.path.isfile(config): |
| return config |
| return None |
| |
| |
| def check_for_kernel_feature(feature): |
| config = running_config() |
| |
| if not config: |
| raise TypeError("Can't find kernel config file") |
| |
| if magic.guess_type(config) == 'application/x-gzip': |
| grep = 'zgrep' |
| else: |
| grep = 'grep' |
| grep += ' ^CONFIG_%s= %s' % (feature, config) |
| |
| if not utils.system_output(grep, ignore_status=True): |
| raise ValueError("Kernel doesn't have a %s feature" % (feature)) |
| |
| |
| def cpu_online_map(): |
| """ |
| Check out the available cpu online map |
| """ |
| cpus = [] |
| for line in open('/proc/cpuinfo', 'r').readlines(): |
| if line.startswith('processor'): |
| cpus.append(line.split()[2]) # grab cpu number |
| return cpus |
| |
| |
| def check_glibc_ver(ver): |
| glibc_ver = commands.getoutput('ldd --version').splitlines()[0] |
| glibc_ver = re.search(r'(\d+\.\d+(\.\d+)?)', glibc_ver).group() |
| if utils.compare_versions(glibc_ver, ver) == -1: |
| raise error.TestError("Glibc too old (%s). Glibc >= %s is needed." % |
| (glibc_ver, ver)) |
| |
| def check_kernel_ver(ver): |
| kernel_ver = utils.system_output('uname -r') |
| kv_tmp = re.split(r'[-]', kernel_ver)[0:3] |
| # In compare_versions, if v1 < v2, return value == -1 |
| if utils.compare_versions(kv_tmp[0], ver) == -1: |
| raise error.TestError("Kernel too old (%s). Kernel > %s is needed." % |
| (kernel_ver, ver)) |
| |
| |
| def human_format(number): |
| # Convert number to kilo / mega / giga format. |
| if number < 1024: |
| return "%d" % number |
| kilo = float(number) / 1024.0 |
| if kilo < 1024: |
| return "%.2fk" % kilo |
| meg = kilo / 1024.0 |
| if meg < 1024: |
| return "%.2fM" % meg |
| gig = meg / 1024.0 |
| return "%.2fG" % gig |
| |
| |
| def numa_nodes(): |
| node_paths = glob.glob('/sys/devices/system/node/node*') |
| nodes = [int(re.sub(r'.*node(\d+)', r'\1', x)) for x in node_paths] |
| return (sorted(nodes)) |
| |
| |
| def node_size(): |
| nodes = max(len(numa_nodes()), 1) |
| return ((memtotal() * 1024) / nodes) |
| |
| |
| def to_seconds(time_string): |
| """Converts a string in M+:SS.SS format to S+.SS""" |
| elts = time_string.split(':') |
| if len(elts) == 1: |
| return time_string |
| return str(int(elts[0]) * 60 + float(elts[1])) |
| |
| |
| def extract_all_time_results(results_string): |
| """Extract user, system, and elapsed times into a list of tuples""" |
| pattern = re.compile(r"(.*?)user (.*?)system (.*?)elapsed") |
| results = [] |
| for result in pattern.findall(results_string): |
| results.append(tuple([to_seconds(elt) for elt in result])) |
| return results |
| |
| |
| def pickle_load(filename): |
| return pickle.load(open(filename, 'r')) |
| |
| |
| # Return the kernel version and build timestamp. |
| def running_os_release(): |
| return os.uname()[2:4] |
| |
| |
| def running_os_ident(): |
| (version, timestamp) = running_os_release() |
| return version + '::' + timestamp |
| |
| |
| def running_os_full_version(): |
| (version, timestamp) = running_os_release() |
| return version |
| |
| |
| # much like find . -name 'pattern' |
| def locate(pattern, root=os.getcwd()): |
| for path, dirs, files in os.walk(root): |
| for f in files: |
| if fnmatch.fnmatch(f, pattern): |
| yield os.path.abspath(os.path.join(path, f)) |
| |
| |
| def freespace(path): |
| """Return the disk free space, in bytes""" |
| s = os.statvfs(path) |
| return s.f_bavail * s.f_bsize |
| |
| |
| def disk_block_size(path): |
| """Return the disk block size, in bytes""" |
| return os.statvfs(path).f_bsize |
| |
| |
| def get_cpu_family(): |
| procinfo = utils.system_output('cat /proc/cpuinfo') |
| CPU_FAMILY_RE = re.compile(r'^cpu family\s+:\s+(\S+)', re.M) |
| matches = CPU_FAMILY_RE.findall(procinfo) |
| if matches: |
| return int(matches[0]) |
| else: |
| raise error.TestError('Could not get valid cpu family data') |
| |
| |
| def get_disks(): |
| df_output = utils.system_output('df') |
| disk_re = re.compile(r'^(/dev/hd[a-z]+)3', re.M) |
| return disk_re.findall(df_output) |
| |
| |
| def load_module(module_name): |
| # Checks if a module has already been loaded |
| if module_is_loaded(module_name): |
| return False |
| |
| utils.system('/sbin/modprobe ' + module_name) |
| return True |
| |
| |
| def unload_module(module_name): |
| """ |
| Removes a module. Handles dependencies. If even then it's not possible |
| to remove one of the modules, it will trhow an error.CmdError exception. |
| |
| @param module_name: Name of the module we want to remove. |
| """ |
| l_raw = utils.system_output("/sbin/lsmod").splitlines() |
| lsmod = [x for x in l_raw if x.split()[0] == module_name] |
| if len(lsmod) > 0: |
| line_parts = lsmod[0].split() |
| if len(line_parts) == 4: |
| submodules = line_parts[3].split(",") |
| for submodule in submodules: |
| unload_module(submodule) |
| utils.system("/sbin/modprobe -r %s" % module_name) |
| logging.info("Module %s unloaded" % module_name) |
| else: |
| logging.info("Module %s is already unloaded" % module_name) |
| |
| |
| def module_is_loaded(module_name): |
| module_name = module_name.replace('-', '_') |
| modules = utils.system_output('/sbin/lsmod').splitlines() |
| for module in modules: |
| if module.startswith(module_name) and module[len(module_name)] == ' ': |
| return True |
| return False |
| |
| |
| def get_loaded_modules(): |
| lsmod_output = utils.system_output('/sbin/lsmod').splitlines()[1:] |
| return [line.split(None, 1)[0] for line in lsmod_output] |
| |
| |
| def get_huge_page_size(): |
| output = utils.system_output('grep Hugepagesize /proc/meminfo') |
| return int(output.split()[1]) # Assumes units always in kB. :( |
| |
| |
| def get_num_huge_pages(): |
| raw_hugepages = utils.system_output('/sbin/sysctl vm.nr_hugepages') |
| return int(raw_hugepages.split()[2]) |
| |
| |
| def set_num_huge_pages(num): |
| utils.system('/sbin/sysctl vm.nr_hugepages=%d' % num) |
| |
| |
| def get_cpu_vendor(): |
| cpuinfo = open('/proc/cpuinfo').read() |
| vendors = re.findall(r'(?m)^vendor_id\s*:\s*(\S+)\s*$', cpuinfo) |
| for i in xrange(1, len(vendors)): |
| if vendors[i] != vendors[0]: |
| raise error.TestError('multiple cpu vendors found: ' + str(vendors)) |
| return vendors[0] |
| |
| |
| def probe_cpus(): |
| """ |
| This routine returns a list of cpu devices found under |
| /sys/devices/system/cpu. |
| """ |
| cmd = 'find /sys/devices/system/cpu/ -maxdepth 1 -type d -name cpu*' |
| return utils.system_output(cmd).splitlines() |
| |
| |
| def ping_default_gateway(): |
| """Ping the default gateway.""" |
| |
| network = open('/etc/sysconfig/network') |
| m = re.search('GATEWAY=(\S+)', network.read()) |
| |
| if m: |
| gw = m.group(1) |
| cmd = 'ping %s -c 5 > /dev/null' % gw |
| return utils.system(cmd, ignore_status=True) |
| |
| raise error.TestError('Unable to find default gateway') |
| |
| |
| def drop_caches(): |
| """Writes back all dirty pages to disk and clears all the caches.""" |
| utils.system("sync") |
| # We ignore failures here as this will fail on 2.6.11 kernels. |
| utils.system("echo 3 > /proc/sys/vm/drop_caches", ignore_status=True) |
| |
| |
| def process_is_alive(name_pattern): |
| """ |
| 'pgrep name' misses all python processes and also long process names. |
| 'pgrep -f name' gets all shell commands with name in args. |
| So look only for command whose initial pathname ends with name. |
| Name itself is an egrep pattern, so it can use | etc for variations. |
| """ |
| return utils.system("pgrep -f '^([^ /]*/)*(%s)([ ]|$)'" % name_pattern, |
| ignore_status=True) == 0 |
| |
| |
| def get_hwclock_seconds(utc=True): |
| """ |
| Return the hardware clock in seconds as a floating point value. |
| Use Coordinated Universal Time if utc is True, local time otherwise. |
| Raise a ValueError if unable to read the hardware clock. |
| """ |
| cmd = '/sbin/hwclock --debug' |
| if utc: |
| cmd += ' --utc' |
| hwclock_output = utils.system_output(cmd, ignore_status=True) |
| match = re.search(r'= ([0-9]+) seconds since .+ (-?[0-9.]+) seconds$', |
| hwclock_output, re.DOTALL) |
| if match: |
| seconds = int(match.group(1)) + float(match.group(2)) |
| logging.debug('hwclock seconds = %f' % seconds) |
| return seconds |
| |
| raise ValueError('Unable to read the hardware clock -- ' + |
| hwclock_output) |
| |
| |
| def set_wake_alarm(alarm_time): |
| """ |
| Set the hardware RTC-based wake alarm to 'alarm_time'. |
| """ |
| utils.write_one_line('/sys/class/rtc/rtc0/wakealarm', str(alarm_time)) |
| |
| |
| def set_power_state(state): |
| """ |
| Set the system power state to 'state'. |
| """ |
| utils.write_one_line('/sys/power/state', state) |
| |
| |
| def standby(): |
| """ |
| Power-on suspend (S1) |
| """ |
| set_power_state('standby') |
| |
| |
| def suspend_to_ram(): |
| """ |
| Suspend the system to RAM (S3) |
| """ |
| set_power_state('mem') |
| |
| |
| def suspend_to_disk(): |
| """ |
| Suspend the system to disk (S4) |
| """ |
| set_power_state('disk') |
