1setopt [ {+|-}options | {+|-}o option name ] [ name ... ] 2 - 3 Set the options for the shell. All options specified either 4 with flags or by name are set. 5 6 If no arguments are supplied, the names of all options currently 7 set are printed. The form is chosen so as to minimize the dif- 8 ferences from the default options for the current emulation (the 9 default emulation being native zsh, shown as <Z> in zshop- 10 tions(1)). Options that are on by default for the emulation are 11 shown with the prefix no only if they are off, while other 12 options are shown without the prefix no and only if they are on. 13 In addition to options changed from the default state by the 14 user, any options activated automatically by the shell (for 15 example, SHIN STDIN or INTERACTIVE) will be shown in the list. 16 - 17 The format is further modified by the option KSH OPTION PRINT, 18 - - 19 however the rationale for choosing options with or without the 20 no prefix remains the same in this case. 21 22 If the -m flag is given the arguments are taken as patterns 23 (which should be quoted to protect them from filename expan- 24 sion), and all options with names matching these patterns are 25 set. 26 27 Note that a bad option name does not cause execution of subse- 28 quent shell code to be aborted; this is behaviour is different 29 from that of `set -o'. This is because set is regarded as a 30 special builtin by the POSIX standard, but setopt is not. 31