70 lines
2.1 KiB
Python
70 lines
2.1 KiB
Python
#!/usr/bin/python2
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import os
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import subprocess
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def read_elf_class(elf_file):
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import struct
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f = open(elf_file, "rb")
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f.seek(4)
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elf_class = f.read(1)
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f.close()
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elf_class = struct.unpack('B', elf_class)[0]
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return elf_class
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def exec_chroot_cmd(args, chroot, pre_chroot = [], mount_vfs = True):
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pid = os.fork()
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if pid == 0:
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os.chroot(chroot)
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os.chdir("/")
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myargs = pre_chroot+args
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rc = subprocess.call(myargs)
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if mount_vfs:
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subprocess.call(("mount", "-t", "proc", "proc", "/proc"))
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subprocess.call(("mount", "-t", "devpts", "devpts", "/dev/pts"))
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os._exit(rc)
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else:
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rc_pid, rc = os.waitpid(pid, 0)
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return rc_pid, rc
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def spawn_ssh(args, chroot):
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# bind /proc and /dev
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for path in []:
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b_args = ["mount", "--bind", path, os.path.join(chroot, path[1:])]
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subprocess.call(b_args)
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bash_exec = os.path.join(chroot, "bin/bash") # must exists
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elf_class = read_elf_class(bash_exec)
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pre_chroot = []
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if elf_class != 2: # 32 bit
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pre_chroot = ["linux32"]
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rc_pid, rc = exec_chroot_cmd(args, chroot, pre_chroot = pre_chroot)
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return rc_pid, rc
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if __name__ == "__main__":
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start_port = 2000
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chroot_dir = "/sabayon/sources"
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chroots = os.listdir(chroot_dir)
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default_args = ["/usr/sbin/sshd"]
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chroot_map_file = "/sabayon/CHROOTS"
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ch_f = open(chroot_map_file, "w")
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ch_f.write("Sabayon Chroots available via SSH:\n")
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for chroot in chroots:
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print("starting chroot %s, ssh at localhost:%s" % (chroot, start_port,))
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start_port += 1
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args = default_args + ["-o", "ListenAddress=127.0.0.1:%s" % (start_port,)]
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pid, exit_st = spawn_ssh(args, os.path.join(chroot_dir, chroot))
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if exit_st == 0:
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print("started sshd in chroot: %s" % (chroot,))
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else:
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print("NOT started sshd in chroot: %s, perhaps already started?" % (chroot,))
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ch_f.write("\t%s at: root@localhost -p %s\n" % (chroot, start_port,))
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ch_f.flush()
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ch_f.close()
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