Attachment 594724 Details for Bug 835838 – Bash session

Bash session

Invisible process session.txt (text/plain), 7.47 KB, created by David Tonhofer on 2012-06-27 09:13:14 UTC

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Creator: David Tonhofer

Created: 2012-06-27 09:13:14 UTC

Size: 7.47 KB

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obsolete

>....Process has been terminated, but a script inists it still exists; investigate. 
>    The first "kill" I use here is the bash builtin (I suppose), switching to /bin/kill later.
>
># kill -0 6156
># echo $?
>0
>
>....So that process is apparently there.
>    "kill -0" is supposed to send signal 0, but the recommended syntax would be "kill -s 0"
>    This is confusing.
> 
># /bin/kill -0 6156
># echo $?
>0
>
>....Same effect. Check whether process exists:
>   
># ps faux | grep 6156
>root      6858  0.0  0.0 103240   828 pts/1    S+   10:45   0:00  |       \_ grep 6156
>
>....More check:
>
># ls /proc/
>Display all 328 possibilities? (y or n)
>1/             1129/          13/            23878/         29278/         348/           4253/          4648/          4916/          59/            940/           interrupts     self/
>10/            1130/          14/            23879/         29279/         3497/          428/           4662/          4922/          6/             943/           iomem          slabinfo
>1082/          1131/          15/            23880/         29280/         35/            429/           4666/          4924/          60/            946/           ioports        softirqs
>1083/          1132/          1564/          23881/         29281/         3515/          4296/          47/            4926/          61/            950/           irq/           stat
>1085/          1133/          1587/          23882/         29282/         3518/          43/            4717/          4934/          62/            954/           kallsyms       swaps
>1086/          1134/          1588/          23986/         29283/         3519/          430/           4720/          4936/          63/            957/           kcore          sys/
>11/            1135/          1589/          23987/         29284/         3521/          431/           4728/          4938/          6390/          960/           keys           sysrq-trigger
>111/           1136/          1590/          23988/         29285/         3541/          4311/          4730/          4943/          64/            963/           key-users      sysvipc/
>1111/          1137/          16/            23989/         298/           3557/          432/           4732/          4966/          65/            969/           kmsg           timer_list
>1112/          1138/          1601/          23990/         299/           3566/          4320/          4733/          5/             6522/          974/           kpagecount     timer_stats
>1113/          1139/          1620/          24/            3/             3578/          4328/          4734/          50/            66/            acpi/          kpageflags     tty/
>1114/          1140/          1638/          24008/         30/            3594/          4340/          4736/          51/            67/            buddyinfo      loadavg        uptime
>1115/          1141/          1666/          24009/         3038/          36/            4350/          4738/          519/           68/            bus/           locks          version
>1116/          1142/          1667/          24010/         31/            37/            4370/          475/           52/            6938/          cgroups        mdstat         vmallocinfo
>1117/          1143/          1668/          24011/         32/            38/            44/            4785/          53/            7/             cmdline        meminfo        vmstat
>1118/          1144/          1669/          24012/         33/            39/            4425/          4787/          5317/          700/           cpuinfo        misc           zoneinfo
>1119/          1145/          1673/          25/            331/           391/           4427/          48/            5368/          73/            crypto         modules        
>1120/          1146/          17/            26/            332/           3926/          4437/          4816/          54/            74/            devices        mounts         
>1121/          1147/          18/            26533/         3394/          393/           4448/          4886/          55/            75/            diskstats      mtd            
>1122/          1148/          19/            26534/         34/            3945/          4462/          4887/          56/            76/            dma            mtrr           
>1123/          1149/          2/             26536/         3405/          4/             4490/          4888/          57/            79/            dri/           net/           
>1124/          1150/          20/            27/            3406/          40/            45/            4891/          5754/          8/             driver/        pagetypeinfo   
>1125/          1175/          21/            28/            3423/          41/            4538/          4895/          58/            80/            execdomains    partitions     
>1126/          1176/          22/            2805/          3465/          4142/          4545/          49/            5823/          9/             fb             sched_debug    
>1127/          1177/          23/            2823/          3474/          42/            4597/          4913/          5840/          919/           filesystems    schedstat      
>1128/          12/            23701/         29/            3475/          4219/          46/            4914/          5874/          937/           fs/            scsi/          
>
>....No 6156. Check with /bin/kill to make sure.
>
># strace /bin/kill -0 6156
>execve("/bin/kill", ["/bin/kill", "-0", "6156"], [/* 36 vars */]) = 0
>brk(0)                                  = 0xc8e000
>mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe99ac53000
>access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
>open("/etc/ld.so.cache", O_RDONLY)      = 3
>fstat(3, {st_mode=S_IFREG|0644, st_size=90299, ...}) = 0
>mmap(NULL, 90299, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fe99ac3c000
>close(3)                                = 0
>open("/lib64/libc.so.6", O_RDONLY)      = 3
>read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360\355\341a4\0\0\0"..., 832) = 832
>fstat(3, {st_mode=S_IFREG|0755, st_size=1918016, ...}) = 0
>mmap(0x3461e00000, 3741864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3461e00000
>mprotect(0x3461f89000, 2093056, PROT_NONE) = 0
>mmap(0x3462188000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x188000) = 0x3462188000
>mmap(0x346218d000, 18600, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x346218d000
>close(3)                                = 0
>mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe99ac3b000
>mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe99ac3a000
>mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe99ac39000
>arch_prctl(ARCH_SET_FS, 0x7fe99ac3a700) = 0
>mprotect(0x3462188000, 16384, PROT_READ) = 0
>mprotect(0x3461c1f000, 4096, PROT_READ) = 0
>munmap(0x7fe99ac3c000, 90299)           = 0
>brk(0)                                  = 0xc8e000
>brk(0xcaf000)                           = 0xcaf000
>open("/usr/lib/locale/locale-archive", O_RDONLY) = 3
>fstat(3, {st_mode=S_IFREG|0644, st_size=99158576, ...}) = 0
>mmap(NULL, 99158576, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fe994da8000
>close(3)                                = 0
>kill(6156, SIG_0)                       = 0  
>exit_group(0)                           = ?
>
>....So we really signal 6156 with 0. But where is it?
>
># /bin/kill 6156
>
>....It responds to SIGTERM!
>
># /bin/kill -0 6156
>kill 6156: No such process
>
>

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Attachments on bug 835838: 594724