dropbearを使用して組み込みLinuxシステムにchroot刑務所を設定しようとしています。私はそれを使用していますこのページガイドとして、目標に応じて少し調整しなければならなかったが。
私はすべてが正しく設定されるべきだと思います。しかし、接続しようとすると、シェルはほぼすぐにシャットダウンするようです。
私は出力をキャプチャしましたstrace（以下は出力の関連部分と思われます）。これは、シェルを処理する必要があるbusyboxプロセスの出力にすぎません。
これはdropbearが起動して接続しようとした後の出力です（このキーをロードできなかったことは問題ではないと思います。RSAキーを正常にロードするため、これはchroot Jailなしで動作するために必要なすべてです）。
[1752] Apr 24 16:23:50 Failed loading /etc/dropbear/dropbear_dss_host_key
[1752] Apr 24 16:23:50 Failed loading /etc/dropbear/dropbear_ecdsa_host_key
[1752] Apr 24 16:23:50 Not backgrounding
[1757] Apr 24 16:23:57 Child connection from 192.168.3.113:52163
[1757] Apr 24 16:23:57 Pubkey auth succeeded for 'filexfer' with key md5 f3:1d:ff:a5:29:7b:1e:e8:fe:0b:b4:bf:e8:33:a4:15 from 192.168.3.113:52163
[1757] Apr 24 16:23:57 Exit (filexfer): Exited normally
以下は関連性があると思われるstrace出力です。
[pid 1737] rt_sigaction(SIGCHLD, {SIG_DFL, [CHLD], SA_RESTART|0x4000000}, <unfinished ...>
[pid 1737] <... rt_sigaction resumed> {0x225e4, [], SA_NOCLDSTOP|0x4000000}, 8) = 0
[pid 1737] dup2(6, 0) = 0
[pid 1737] dup2(9, 1) = 1
[pid 1737] dup2(11, 2) = 2
[pid 1737] close(7) = 0
[pid 1737] close(6) = 0
[pid 1737] close(8) = 0
[pid 1737] close(9) = 0
[pid 1737] close(10) = 0
[pid 1737] close(11) = 0
[pid 1737] open("/dev/urandom", O_RDONLY|O_LARGEFILE) = 6
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999988})
[pid 1737] read(6, "\207\203\\\207\211\35.EA\340[\260\356h\345n\366\36\256d\252O\236\371N\"\352\4\330\5i4", 32) = 32
[pid 1737] close(6) = 0
[pid 1737] open("/proc/timer_list", O_RDONLY|O_LARGEFILE) = 6
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999992})
[pid 1737] read(6, "Timer List Version: v0.7\nHRTIMER"..., 4096) = 2450
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999991})
[pid 1737] read(6, "", 4096) = 0
[pid 1737] close(6) = 0
[pid 1737] open("/proc/interrupts", O_RDONLY|O_LARGEFILE) = 6
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999994})
[pid 1737] read(6, " CPU0 \n 28: "..., 4096) = 1213
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999994})
[pid 1737] read(6, "", 4096) = 0
[pid 1737] close(6) = 0
[pid 1737] open("/proc/loadavg", O_RDONLY|O_LARGEFILE) = 6
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999993})
[pid 1737] read(6, "0.00 0.01 0.05 1/65 1737\n", 4096) = 25
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999994})
[pid 1737] read(6, "", 4096) = 0
[pid 1737] close(6) = 0
[pid 1737] open("/proc/sys/kernel/random/entropy_avail", O_RDONLY|O_LARGEFILE) = 6
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999982})
[pid 1737] read(6, "196\n", 4096) = 4
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999993})
[pid 1737] read(6, "", 4096) = 0
[pid 1737] close(6) = 0
[pid 1737] open("/proc/net/netstat", O_RDONLY|O_LARGEFILE) = 6
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999989})
[pid 1737] read(6, "TcpExt: SyncookiesSent Syncookie"..., 4096) = 2010
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999994})
[pid 1737] read(6, "", 2086) = 0
[pid 1737] close(6) = 0
[pid 1737] open("/proc/net/dev", O_RDONLY|O_LARGEFILE) = 6
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999994})
[pid 1737] read(6, "Inter-| Receive "..., 4096) = 569
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999995})
[pid 1737] read(6, "", 3527) = 0
[pid 1737] close(6) = 0
[pid 1737] open("/proc/net/tcp", O_RDONLY|O_LARGEFILE) = 6
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999994})
[pid 1737] read(6, " sl local_address rem_address "..., 4096) = 450
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999994})
[pid 1737] read(6, "", 3646) = 0
[pid 1737] close(6) = 0
[pid 1737] open("/proc/net/rt_cache", O_RDONLY|O_LARGEFILE) = 6
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999993})
[pid 1737] read(6, "Iface\tDestination\tGateway \tFlags"..., 4096) = 128
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999994})
[pid 1737] read(6, "", 3968) = 0
[pid 1737] close(6) = 0
[pid 1737] open("/proc/vmstat", O_RDONLY|O_LARGEFILE) = 6
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999994})
[pid 1737] read(6, "nr_free_pages 112743\nnr_alloc_ba"..., 4096) = 1658
[pid 1737] select(7, [6], NULL, NULL, {2, 0}) = 1 (in [6], left {1, 999994})
[pid 1737] read(6, "", 4096) = 0
[pid 1737] close(6) = 0
[pid 1737] gettimeofday({1493050478, 344430}, NULL) = 0
[pid 1737] times({tms_utime=0, tms_stime=0, tms_cutime=0, tms_cstime=0}) = 144217
[pid 1737] open("/dev/urandom", O_WRONLY|O_CREAT|O_TRUNC|O_LARGEFILE, 0666) = 6
[pid 1737] fstat64(6, {st_mode=S_IFCHR|0666, st_rdev=makedev(1, 9), ...}) = 0
[pid 1737] ioctl(6, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, 0xbe98c13c) = -1 EINVAL (Invalid argument)
[pid 1737] mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6f31000
[pid 1737] write(6, "\3672\272 <\300W\16\340j\0210gr\207+\242\267\303JE\20oc\35\17K\337|O\242\274", 32) = 32
[pid 1737] close(6) = 0
[pid 1737] munmap(0xb6f31000, 4096) = 0
[pid 1737] getuid32() = 0
[pid 1737] setgid32(2000) = 0
[pid 1737] open("/proc/sys/kernel/ngroups_max", O_RDONLY) = 6
[pid 1737] read(6, "65536\n", 31) = 6
[pid 1737] close(6) = 0
[pid 1737] socket(PF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 6
[pid 1737] connect(6, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
[pid 1737] close(6) = 0
[pid 1737] socket(PF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 6
[pid 1737] connect(6, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
[pid 1737] close(6) = 0
[pid 1737] open("/etc/group", O_RDONLY|O_CLOEXEC) = 6
[pid 1737] _llseek(6, 0, [0], SEEK_CUR) = 0
[pid 1737] fstat64(6, {st_mode=S_IFREG|0644, st_size=17, ...}) = 0
[pid 1737] mmap2(NULL, 17, PROT_READ, MAP_SHARED, 6, 0) = 0xb6f31000
[pid 1737] _llseek(6, 17, [17], SEEK_SET) = 0
[pid 1737] fstat64(6, {st_mode=S_IFREG|0644, st_size=17, ...}) = 0
[pid 1737] munmap(0xb6f31000, 17) = 0
[pid 1737] close(6) = 0
[pid 1737] setgroups32(1, [2000]) = 0
[pid 1737] setuid32(2000) = 0
[pid 1737] chdir("/home/filexfer") = 0
[pid 1737] rt_sigaction(SIGPIPE, {SIG_DFL, [PIPE], SA_RESTART|0x4000000}, {SIG_IGN, [PIPE], SA_RESTART|0x4000000}, 8) = 0
[pid 1737] close(3) = 0
[pid 1737] close(4) = 0
[pid 1737] close(5) = 0
[pid 1737] execve("/bin/sh", ["sh", "-c", "/usr/lib/openssh/sftp-server"], [/* 6 vars */]) = 0
[pid 1737] brk(0) = 0xa0000
[pid 1737] uname({sys="Linux", node="unknown", ...}) = 0
[pid 1737] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
[pid 1737] mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6fec000
[pid 1737] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
[pid 1737] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/arm-linux-gnueabihf/tls/v7l/neon/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/arm-linux-gnueabihf/tls/v7l/neon/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/arm-linux-gnueabihf/tls/v7l/neon/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/arm-linux-gnueabihf/tls/v7l/neon", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/arm-linux-gnueabihf/tls/v7l/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/arm-linux-gnueabihf/tls/v7l/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/arm-linux-gnueabihf/tls/v7l/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/arm-linux-gnueabihf/tls/v7l", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/arm-linux-gnueabihf/tls/neon/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/arm-linux-gnueabihf/tls/neon/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/arm-linux-gnueabihf/tls/neon/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/arm-linux-gnueabihf/tls/neon", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/arm-linux-gnueabihf/tls/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/arm-linux-gnueabihf/tls/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/arm-linux-gnueabihf/tls/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/arm-linux-gnueabihf/tls", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/arm-linux-gnueabihf/v7l/neon/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/arm-linux-gnueabihf/v7l/neon/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/arm-linux-gnueabihf/v7l/neon/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/arm-linux-gnueabihf/v7l/neon", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/arm-linux-gnueabihf/v7l/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/arm-linux-gnueabihf/v7l/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/arm-linux-gnueabihf/v7l/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/arm-linux-gnueabihf/v7l", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/arm-linux-gnueabihf/neon/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/arm-linux-gnueabihf/neon/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/arm-linux-gnueabihf/neon/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/arm-linux-gnueabihf/neon", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/arm-linux-gnueabihf/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/arm-linux-gnueabihf/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/arm-linux-gnueabihf/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/arm-linux-gnueabihf", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/usr/lib/arm-linux-gnueabihf/tls/v7l/neon/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/usr/lib/arm-linux-gnueabihf/tls/v7l/neon/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/usr/lib/arm-linux-gnueabihf/tls/v7l/neon/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/usr/lib/arm-linux-gnueabihf/tls/v7l/neon", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/usr/lib/arm-linux-gnueabihf/tls/v7l/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/usr/lib/arm-linux-gnueabihf/tls/v7l/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/usr/lib/arm-linux-gnueabihf/tls/v7l/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/usr/lib/arm-linux-gnueabihf/tls/v7l", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/usr/lib/arm-linux-gnueabihf/tls/neon/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/usr/lib/arm-linux-gnueabihf/tls/neon/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/usr/lib/arm-linux-gnueabihf/tls/neon/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/usr/lib/arm-linux-gnueabihf/tls/neon", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/usr/lib/arm-linux-gnueabihf/tls/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/usr/lib/arm-linux-gnueabihf/tls/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/usr/lib/arm-linux-gnueabihf/tls/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/usr/lib/arm-linux-gnueabihf/tls", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/usr/lib/arm-linux-gnueabihf/v7l/neon/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/usr/lib/arm-linux-gnueabihf/v7l/neon/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/usr/lib/arm-linux-gnueabihf/v7l/neon/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/usr/lib/arm-linux-gnueabihf/v7l/neon", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/usr/lib/arm-linux-gnueabihf/v7l/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/usr/lib/arm-linux-gnueabihf/v7l/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/usr/lib/arm-linux-gnueabihf/v7l/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/usr/lib/arm-linux-gnueabihf/v7l", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/usr/lib/arm-linux-gnueabihf/neon/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/usr/lib/arm-linux-gnueabihf/neon/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/usr/lib/arm-linux-gnueabihf/neon/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/usr/lib/arm-linux-gnueabihf/neon", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/usr/lib/arm-linux-gnueabihf/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/usr/lib/arm-linux-gnueabihf/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/usr/lib/arm-linux-gnueabihf/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/usr/lib/arm-linux-gnueabihf", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/tls/v7l/neon/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/tls/v7l/neon/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/tls/v7l/neon/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/tls/v7l/neon", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/tls/v7l/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/tls/v7l/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/tls/v7l/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/tls/v7l", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/tls/neon/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/tls/neon/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/tls/neon/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/tls/neon", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/tls/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/tls/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/tls/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/tls", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/v7l/neon/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/v7l/neon/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/v7l/neon/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/v7l/neon", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/v7l/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/v7l/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/v7l/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/v7l", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/neon/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/neon/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/neon/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/neon", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/vfp/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1737] stat64("/lib/vfp", 0xbec864f0) = -1 ENOENT (No such file or directory)
[pid 1737] open("/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
[pid 1737] read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\335\4\214D4\0\0\0"..., 512) = 512
[pid 1737] lseek(3, 887460, SEEK_SET) = 887460
[pid 1737] read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 1480) = 1480
[pid 1737] lseek(3, 885236, SEEK_SET) = 885236
[pid 1737] read(3, "A4\0\0\0aeabi\0\1*\0\0\0\0057-A\0\6\n\7A\10\1\t\2\n\4\22"..., 53) = 53
[pid 1737] fstat64(3, {st_mode=S_IFREG|0755, st_size=888940, ...}) = 0
[pid 1737] mmap2(0x448a8000, 928112, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x448a8000
[pid 1737] mprotect(0x4497d000, 32768, PROT_NONE) = 0
[pid 1737] mmap2(0x44985000, 16384, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xd5000) = 0x44985000
[pid 1737] mmap2(0x44989000, 6512, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x44989000
[pid 1737] close(3) = 0
[pid 1737] mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6feb000
[pid 1737] set_tls(0xb6feb820, 0xb6febef8, 0x44817048, 0xb6feb820, 0xb6feb158) = 0
[pid 1737] mprotect(0x44985000, 8192, PROT_READ) = 0
[pid 1737] mprotect(0x44816000, 4096, PROT_READ) = 0
[pid 1737] getuid32() = 2000
[pid 1737] stat64("/etc/busybox.conf", 0xbec86b80) = -1 ENOENT (No such file or directory)
[pid 1737] getgid32() = 2000
[pid 1737] setgid32(2000) = 0
[pid 1737] setuid32(2000) = 0
[pid 1737] brk(0) = 0xa0000
[pid 1737] brk(0xc1000) = 0xc1000
[pid 1737] getpid() = 1737
[pid 1737] rt_sigaction(SIGCHLD, {SIG_DFL, [CHLD], SA_RESTART|0x4000000}, {SIG_DFL, [], 0}, 8) = 0
[pid 1737] rt_sigaction(SIGHUP, {SIG_DFL, [HUP], SA_RESTART|0x4000000}, {SIG_DFL, [], 0}, 8) = 0
[pid 1737] getppid() = 1736
[pid 1737] getcwd("/home/filexfer", 4096) = 15
[pid 1737] rt_sigaction(SIGINT, NULL, {SIG_DFL, [], 0}, 8) = 0
[pid 1737] rt_sigaction(SIGINT, {0x37dbc, ~[RTMIN RT_1], 0x4000000 /* SA_??? */}, NULL, 8) = 0
[pid 1737] rt_sigaction(SIGQUIT, NULL, {SIG_DFL, [], 0}, 8) = 0
[pid 1737] rt_sigaction(SIGQUIT, {SIG_IGN, ~[RTMIN RT_1], 0x4000000 /* SA_??? */}, NULL, 8) = 0
[pid 1737] rt_sigaction(SIGTERM, NULL, {SIG_DFL, [], 0}, 8) = 0
[pid 1737] rt_sigaction(SIGTERM, {SIG_DFL, ~[RTMIN RT_1], 0x4000000 /* SA_??? */}, NULL, 8) = 0
[pid 1737] clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0xb6feb3c8) = 1738
[pid 1737] wait4(-1, Process 1738 attached
[pid 1737] <... wait4 resumed> [{WIFEXITED(s) && WEXITSTATUS(s) == 127}], 0, NULL) = 1738
[pid 1737] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1738, si_status=127, si_utime=0, si_stime=0} ---
[pid 1737] exit_group(127) = ?
[pid 1737] +++ exited with 127 +++
答え1
chrootファイルシステムにライブラリが欠落していることがわかりましたlibnss*。多くの出力を確認するのに多くの時間を費やしてこれを見つけましたstrace。