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help page:  sig


NAME
  sig - task signal handling

SYNOPSIS
  sig [[-l] | [-s sigset]] | [pid | taskp] ...

DESCRIPTION
  This command displays signal-handling data of one or more tasks.  Multiple
  task or PID numbers may be entered; if no arguments are entered, the signal
  handling data of the current context will be displayed.  The default display
  shows:
 
    1.  Whether the task has an unblocked signal pending.
    2.  The contents of the "signal" and "blocked" sigset_t structures
        from the task_struct, both of which are represented as a 64-bit 
        hexadecimal value.
    3.  A formatted dump of the "sig" signal_struct structure referenced by
        the task_struct.  For each defined signal, it shows the sigaction
        structure address, the signal handler, the signal sigset_t mask 
        (also expressed as a 64-bit hexadecimal value), and the flags.
    4.  For each queued signal, if any, its signal number and associated
        siginfo structure address.
 
  The -l option lists the signal numbers and their name(s).  The -s option
  translates a 64-bit hexadecimal value representing the contents of a
  sigset_t structure into the signal names whose bits are set.
 
        pid  a process PID.
      taskp  a hexadecimal task_struct pointer.
         -l  displays the defined signal numbers and names.
  -s sigset  translates a 64-bit hexadecimal value representing a sigset_t
             into a list of signal names associated with the bits set.

EXAMPLES
  Dump the signal-handling data of PID 614:

    crash> sig 614
    PID: 614    TASK: c6f26000  CPU: 1   COMMAND: "httpd"
    SIGPENDING: no
        SIGNAL: 0000000000000000
       BLOCKED: 0000000000000000
    SIGNAL_STRUCT: c1913800  COUNT: 1
     SIG SIGACTION  HANDLER       MASK       FLAGS   
     [1]  c1913804  8057c98 0000000000000201 0 
     [2]  c1913818  8057c8c 0000000000000000 0 
     [3]  c191382c  SIG_DFL 0000000000000000 0 
     [4]  c1913840  8057bd8 0000000000000000 80000000 (SA_RESETHAND)
     [5]  c1913854  SIG_DFL 0000000000000000 0 
     [6]  c1913868  8057bd8 0000000000000000 80000000 (SA_RESETHAND)
     [7]  c191387c  8057bd8 0000000000000000 80000000 (SA_RESETHAND)
     [8]  c1913890  SIG_DFL 0000000000000000 0 
     [9]  c19138a4  SIG_DFL 0000000000000000 0 
    [10]  c19138b8  8057c98 0000000000000201 0 
    [11]  c19138cc  8057bd8 0000000000000000 80000000 (SA_RESETHAND)
    [12]  c19138e0  SIG_DFL 0000000000000000 0 
    [13]  c19138f4  SIG_IGN 0000000000000000 0 
    [14]  c1913908  SIG_DFL 0000000000000000 0 
    [15]  c191391c  8057c8c 0000000000000000 0 
    [16]  c1913930  SIG_DFL 0000000000000000 0 
    [17]  c1913944  SIG_DFL 0000000000000000 0 
    [18]  c1913958  SIG_DFL 0000000000000000 0 
    [19]  c191396c  SIG_DFL 0000000000000000 0 
    [20]  c1913980  SIG_DFL 0000000000000000 0 
    [21]  c1913994  SIG_DFL 0000000000000000 0 
    [22]  c19139a8  SIG_DFL 0000000000000000 0 
    [23]  c19139bc  SIG_DFL 0000000000000000 0 
    [24]  c19139d0  SIG_DFL 0000000000000000 0 
    [25]  c19139e4  SIG_DFL 0000000000000000 0 
    [26]  c19139f8  SIG_DFL 0000000000000000 0 
    [27]  c1913a0c  SIG_DFL 0000000000000000 0 
    [28]  c1913a20  SIG_DFL 0000000000000000 0 
    [29]  c1913a34  SIG_DFL 0000000000000000 0 
    [30]  c1913a48  SIG_DFL 0000000000000000 0 
    [31]  c1913a5c  SIG_DFL 0000000000000000 0 
    SIGQUEUE: (empty)
    
  Translate the sigset_t mask value, cut-and-pasted from the signal handling
  data from signals 1 and 10 above:
 
    crash> sig -s 0000000000000201
    SIGHUP SIGUSR1
 
  List the signal numbers and their names:
 
    crash> sig -l
     [1] SIGHUP
     [2] SIGINT
     [3] SIGQUIT
     [4] SIGILL
     [5] SIGTRAP
     [6] SIGABRT/SIGIOT
     [7] SIGBUS
     [8] SIGFPE
     [9] SIGKILL
    [10] SIGUSR1
    [11] SIGSEGV
    [12] SIGUSR2
    [13] SIGPIPE
    [14] SIGALRM
    [15] SIGTERM
    [16] SIGSTKFLT
    [17] SIGCHLD/SIGCLD
    [18] SIGCONT
    [19] SIGSTOP
    [20] SIGTSTP
    [21] SIGTTIN
    [22] SIGTTOU
    [23] SIGURG
    [24] SIGXCPU
    [25] SIGXFSZ
    [26] SIGVTALRM
    [27] SIGPROF
    [28] SIGWINCH
    [29] SIGIO/SIGPOLL
    [30] SIGPWR
    [31] SIGSYS


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