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# author: Dominik Richter
# author: Christoph Hartmann
module Train::Extras
class Stat
TYPES = {
socket: 00140000,
symlink: 00120000,
file: 00100000,
block_device: 00060000,
directory: 00040000,
character_device: 00020000,
pipe: 00010000,
}.freeze
def self.find_type(mode)
res = TYPES.find { |_, mask| mask & mode == mask }
res.nil? ? :unknown : res[0]
end
def self.stat(shell_escaped_path, backend, follow_symlink)
# use perl scripts for aix, solaris 10 and hpux
if backend.os.aix? || (backend.os.solaris? && backend.os[:release].to_i < 11) || backend.os.hpux?
return aix_stat(shell_escaped_path, backend, follow_symlink)
end
return bsd_stat(shell_escaped_path, backend, follow_symlink) if backend.os.bsd?
# linux,solaris 11 and esx will use standard linux stats
return linux_stat(shell_escaped_path, backend, follow_symlink) if backend.os.unix? || backend.os.esx?
# all other cases we don't handle
# TODO: print an error if we get here, as it shouldn't be invoked
# on non-unix
{}
end
def self.linux_stat(shell_escaped_path, backend, follow_symlink)
lstat = follow_symlink ? " -L" : ""
format = (backend.os.esx? || %w{alpine yocto ubios}.include?(backend.os[:name])) ? "-c" : "--printf"
res = backend.run_command("stat#{lstat} #{shell_escaped_path} 2>/dev/null #{format} '%s\n%f\n%U\n%u\n%G\n%g\n%X\n%Y\n%C'")
# ignore the exit_code: it is != 0 if selinux labels are not supported
# on the system.
fields = res.stdout.split("\n")
return {} if fields.length != 9
tmask = fields[1].to_i(16)
selinux = fields[8]
## selinux security context string not available on esxi
selinux = nil if (selinux == "?") || (selinux == "(null)") || (selinux == "C")
{
type: find_type(tmask),
mode: tmask & 07777,
owner: fields[2],
uid: fields[3].to_i,
group: fields[4],
gid: fields[5].to_i,
mtime: fields[7].to_i,
size: fields[0].to_i,
selinux_label: selinux,
}
end
def self.bsd_stat(shell_escaped_path, backend, follow_symlink)
# From stat man page on FreeBSD:
# z The size of file in bytes (st_size).
# p File type and permissions (st_mode).
# u, g User ID and group ID of file's owner (st_uid, st_gid).
# a, m, c, B
# The time file was last accessed or modified, or when the
# inode was last changed, or the birth time of the inode
# (st_atime, st_mtime, st_ctime, st_birthtime).
#
# The special output specifier S may be used to indicate that the
# output, if applicable, should be in string format. May be used
# in combination with:
# ...
# gu Display group or user name.
lstat = follow_symlink ? " -L" : ""
res = backend.run_command(
"stat#{lstat} -f '%z\n%p\n%Su\n%u\n%Sg\n%g\n%a\n%m' "\
"#{shell_escaped_path}"
)
return {} if res.exit_status != 0
fields = res.stdout.split("\n")
return {} if fields.length != 8
tmask = fields[1].to_i(8)
{
type: find_type(tmask),
mode: tmask & 07777,
owner: fields[2],
uid: fields[3].to_i,
group: fields[4],
gid: fields[5].to_i,
mtime: fields[7].to_i,
size: fields[0].to_i,
selinux_label: fields[8],
}
end
def self.aix_stat(shell_escaped_path, backend, follow_symlink)
# Perl here b/c it is default on AIX
lstat = follow_symlink ? "lstat" : "stat"
stat_cmd = <<-EOP
perl -e '
@a = #{lstat}(shift) or exit 2;
$u = getpwuid($a[4]);
$g = getgrgid($a[5]);
printf("0%o\\n%s\\n%d\\n%s\\n%d\\n%d\\n%d\\n", $a[2], $u, $a[4], $g, $a[5], $a[9], $a[7])
' #{shell_escaped_path}
EOP
res = backend.run_command(stat_cmd)
return {} if res.exit_status != 0
fields = res.stdout.split("\n")
return {} if fields.length != 7
tmask = fields[0].to_i(8)
{
type: find_type(tmask),
mode: tmask & 07777,
owner: fields[1],
uid: fields[2].to_i,
group: fields[3],
gid: fields[4].to_i,
mtime: fields[5].to_i,
size: fields[6].to_i,
selinux_label: nil,
}
end
end
end
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