[ts-7000] sshd fails to stay in memory on a TS7400 NAND-flash

["Dave da brave" <>]

I tried to get sshd running on my tiny NAND-flash partition.
(kernel 2.4.26-ts11)

After compilation and installation everything seems fine, except.... sshd 
always exits:

# strace /etc/init.d/ssh start
execve("/etc/init.d/ssh", ["/etc/init.d/ssh", "start"], [/* 11 vars */]) = 0
uname({sys="Linux", node="ARM100", ...}) = 0
brk(0)                                  = 0xcfe04
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0x2aac0000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/lib/v4l/libcrypt.so.1", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/v4l", 0x7ffff418)          = -1 ENOENT (No such file or directory)
open("/lib/libcrypt.so.1", O_RDONLY)    = 3
read(3, "\177ELF\1\1\1a\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\30\10\0\000"..., 512) = 
512
fstat64(3, {st_mode=S_IFREG|0666, st_size=21860, ...}) = 0
mmap2(NULL, 213292, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 
0x2aac9000
mprotect(0x2aace000, 192812, PROT_NONE) = 0
mmap2(0x2aad5000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x4) = 0x2aad5000
mmap2(0x2aad7000, 155948, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2aad7000
close(3)                                = 0
open("/lib/libm.so.6", O_RDONLY)        = 3
read(3, "\177ELF\1\1\1a\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\3042\0\000"..., 512) = 
512
fstat64(3, {st_mode=S_IFREG|0644, st_size=444224, ...}) = 0
mmap2(NULL, 475460, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 
0x2aafe000
mprotect(0x2ab6a000, 33092, PROT_NONE)  = 0
mmap2(0x2ab71000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6b) = 0x2ab71000
close(3)                                = 0
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\1\1\1a\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0HO\1\0004"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0777, st_size=1091040, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0x2aac1000
mmap2(NULL, 1128068, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 
0x2ab73000
mprotect(0x2ac7a000, 50820, PROT_NONE)  = 0
mmap2(0x2ac81000, 12288, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x106) = 0x2ac81000
mmap2(0x2ac84000, 9860, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2ac84000
close(3)                                = 0
mprotect(0x2ac81000, 8192, PROT_READ)   = 0
mprotect(0x2ab71000, 4096, PROT_READ)   = 0
mprotect(0x2aad5000, 4096, PROT_READ)   = 0
mprotect(0x2aac7000, 4096, PROT_READ)   = 0
getpid()                                = 1458
getuid32()                              = 0
brk(0)                                  = 0xcfe04
brk(0xf0e04)                            = 0xf0e04
brk(0xf1000)                            = 0xf1000
getpid()                                = 1458
time(NULL)                              = 1242307603
rt_sigaction(SIGCHLD, {SIG_DFL}, {SIG_DFL}, 8) = 0
geteuid32()                             = 0
getppid()                               = 1457
stat64("/", {st_mode=S_IFDIR|0755, st_size=512, ...}) = 0
stat64(".", {st_mode=S_IFDIR|0755, st_size=512, ...}) = 0
open("/etc/init.d/ssh", O_RDONLY|O_LARGEFILE) = 3
fcntl64(3, F_DUPFD, 10)                 = 10
close(3)                                = 0
fcntl64(10, F_SETFD, FD_CLOEXEC)        = 0
rt_sigaction(SIGINT, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGINT, {0x4d364, ~[], 0x4000000 /* SA_??? */}, NULL, 8) = 0
rt_sigaction(SIGQUIT, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGQUIT, {SIG_DFL}, NULL, 8) = 0
rt_sigaction(SIGTERM, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGTERM, {SIG_DFL}, NULL, 8) = 0
read(10, "#! /bin/sh\nset -e\n\n# /etc/init.d"..., 8191) = 2249
stat64("/usr/sbin/sshd", {st_mode=S_IFREG|0755, st_size=314944, ...}) = 0
geteuid32()                             = 0
stat64("/usr/sbin/sshd", {st_mode=S_IFREG|0755, st_size=314944, ...}) = 0
fork()                                  = 1459
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 1459
--- SIGCHLD (Child exited) @ 0 (0) ---
stat64("/etc/default/ssh", 0x7ffff9cc)  = -1 ENOENT (No such file or directory)
stat64("/usr/local/etc/ssh_host_key", {st_mode=S_IFREG|0600, st_size=963, ...}) 
= 0
stat64("/usr/local/etc/ssh_host_rsa_key", {st_mode=S_IFREG|0600, st_size=1675, 
...}) = 0
stat64("/usr/local/etc/ssh_host_dsa_key", {st_mode=S_IFREG|0600, st_size=668, 
...}) = 0
stat64("/usr/local/etc/sshd_not_to_be_run", 0x7ffff760) = -1 ENOENT (No such 
file or directory)
stat64("/var/run/sshd", {st_mode=S_IFDIR|0755, st_size=512, ...}) = 0
dup2(1, 1)                              = 1
fstat64(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 1), ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0x2aac2000
write(1, "Starting OpenBSD Secure Shell se"..., 42Starting OpenBSD Secure Shell 
server: sshd) = 42
stat64("/sbin/start-stop-daemon", {st_mode=S_IFREG|0755, st_size=777544, ...}) 
= 0
fork()                                  = 1462
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 1462
--- SIGCHLD (Child exited) @ 0 (0) ---
dup2(1, 1)                              = 1
write(1, ".\n", 2.
)                      = 2
io_submit(0, 0xffffffff, 0xcfe58 <unfinished ... exit status 0>
Process 1458 detached



Any suggestions are welcome?

Could it be related to the fork() command? I had problems with it in earlier 
software versions...

Thanks in advance!






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