[LinuxPPS] Not seeing PPS with new stuff (MORE)

[clemens at dwf.com]

> Strange behaviour... the proces should be killable... can you please
> run ttyctrl with strace?
> 
>    strace ttyctrl <params>
> 

OK here's what I see:

[root at deneb Desktop]# strace ./ttyctrl -X -s 17 /dev/ttyS0
execve("./ttyctrl", ["./ttyctrl", "-X", "-s", "17", "/dev/ttyS0"], [/* 45 vars */]) = 0
brk(0)                                  = 0x804a000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=79274, ...}) = 0
mmap2(NULL, 79274, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7eff000
close(3)                                = 0
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0000\237S\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1589908, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7efe000
mmap2(0x524000, 1308068, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x524000
mmap2(0x65e000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13a) = 0x65e000
mmap2(0x661000, 9636, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x661000
close(3)                                = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7efd000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7efd6c0, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0x65e000, 8192, PROT_READ)     = 0
mprotect(0x520000, 4096, PROT_READ)     = 0
munmap(0xb7eff000, 79274)               = 0
open("/dev/ttyS0", O_RDWR)              = 3
ioctl(3, TIOCSETD, [17])                = 0
pause(

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Now if I give ttyctrl a kill -9 from another window, the last line of the strace changes to

pause()                                 = ? ERESTARTNOHAND (To be restarted)

---

Additional kills do not change anything in the strace, and the process is still there.

---

If I now go to another window, and run the strace again, I see:

[root at deneb Desktop]# strace ./ttyctrl -X -s 17 /dev/ttyS0
execve("./ttyctrl", ["./ttyctrl", "-X", "-s", "17", "/dev/ttyS0"], [/* 45 vars */]) = 0
brk(0)                                  = 0x804a000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=79274, ...}) = 0
mmap2(NULL, 79274, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7f39000
close(3)                                = 0
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0000\237S\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1589908, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7f38000
mmap2(0x524000, 1308068, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x524000
mmap2(0x65e000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13a) = 0x65e000
mmap2(0x661000, 9636, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x661000
close(3)                                = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7f37000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7f376c0, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0x65e000, 8192, PROT_READ)     = 0
mprotect(0x520000, 4096, PROT_READ)     = 0
munmap(0xb7f39000, 79274)               = 0
open("/dev/ttyS0", O_RDWR

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and nothing happens in the strace when I do a kill on this ttyctrl.

Hope this gives you some ideas.

-- 
                                        Reg.Clemens
                                        reg at dwf.com