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#compdef truss

local curcontext="$curcontext" state line expl ret=1
typeset -A opt_args
local args faults

args=(
  '(-c)-a[show argument strings with exec system call]'
  '(-a -d -D -e -E -l -r -v -w -x)-c[count traced system calls, signals etc]'
  '(-c)-d[include timestamps in output]'
  '(-c)-D[include delta timestamps in output]'
  '(-c)-e[show environment strings with exec system call]'
  '-f[follow child processes created after a fork]'
  '-o+[specify trace output file]:output file:_files'
)

case $OSTYPE in
  solaris2.<11->)
    args+=( '(-c)-A[include absolute timestamps in output]' )
  ;|
  aix*|solaris*)
    args+=(
      '(-c)-E[include delta timestamps of time spent within the system call]'
      "-i[don't display interruptible sleeping system calls]"
      '(-c)-l[include LWP id in each line of output]'
      '-m+[specify machine faults to trace]: :->faults'
      '(-c)-r+[show full contents of the I/O buffer for each read()]:file descriptor'
      '-s+[specify signals to trace]:signal:_sequence _signals -M "B\:!="'
      '-S+[specify signals at which process should be stopped and abandoned]:signal:_sequence _signals -M "B\:!="'
      '-t+[specify system calls to trace or exclude]:system call:_sequence _sys_calls -a -M "B\:!="'
      '-T+[specify system calls at which process should be stopped and abandoned]:system call:_sequence _sys_calls -a -M "B\:!="'
      '*-u+[user-level function call tracing]: :->userfuncs'
      '-U+[specify user-level functions at which process should be stopped and abandoned]: :->userfuncs'
      '(-c)-v+[enable verbose output of structures for specified system calls]:system call:_sequence _sys_calls -a -M "B\:!="'
      '(-c)-w+[show full contents of the I/O buffer for each write()]:file descriptor'
      '(-c)-x+[enable raw output of structures for specified system calls]:system call:_sequence _sys_calls -a'
      '-p[trace specified existing processes]'
    )
  ;;
  dragonfly*|freebsd*)
    args+=(
      '-s+[specify the maximum string size to print]:maximum string size [32]'
      "(-c)-S[don't report signals received by the process]"
      '(*)-p[trace specified existing processes]:pid:_pids'
    )
  ;|
  freebsd<10->.*)
    args+=( '-H[include thread ID in the output of each event]' )
  ;;
esac

_arguments -C -s : $args \
  '*::arguments:->args' && ret=0

case $state in
  faults)
    faults=( all ${${${(M)${(f)"$(</usr/include/sys/fault.h)"}:#?define[[:blank:]]##FLT*}#*[[:blank:]]FLT}%%[[:blank:]]*} ) 2>/dev/null
    _sequence _wanted faults expl fault compadd - -M 'B:!=' -M 'B:[Ff][Ll][Tt]=' -M 'm:{a-z}={A-Z}' -a faults && ret=0
  ;;
  args)
    if [[ $OSTYPE = solaris* ]] && (( $+opt_args[-p] )); then
      _pids && ret=0
    elif (( CURRENT == 1 )); then
      _command_names -e && ret=0
    else
      _normal && ret=0
    fi
  ;;
  userfuncs)
    if [[ -prefix *: ]]; then
      _message -e functions function
    else
      compset -P '*,'
      compset -S '[,:]*'
      _description -x libs expl lib
      compadd "$expl[@]" -S '' lib && ret=0
      compadd "$expl[@]" -qS, a.out && ret=0
    fi
  ;;
esac

return ret