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Diffstat (limited to 'Doc/Zsh/compat.yo')
| -rw-r--r-- | Doc/Zsh/compat.yo | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/Doc/Zsh/compat.yo b/Doc/Zsh/compat.yo index 26f8fe896..43fa40390 100644 --- a/Doc/Zsh/compat.yo +++ b/Doc/Zsh/compat.yo @@ -7,19 +7,15 @@ cindex(compatibility) cindex(sh, compatibility) cindex(ksh, compatibility) Zsh tries to emulate bf(sh) or bf(ksh) when it is invoked as -tt(sh) or tt(ksh) respectively. More precisely, it looks at the first -letter of the name passed to it, which may not necessarily be the -name of the executable file, ignoring any initial `tt(-)' as well as -`tt(r)' (for restricted); an `tt(s)' or `tt(b)' will force -bf(sh) compatibility, while `tt(k)' will force bf(ksh) compatibility. An -exception is if the name excluding any `tt(-)' is tt(su), in which case -the environment variable tt(SHELL) will be used to test the emulation; -this is to workaround a problem under some operating systems where the -tt(su) command does not change the name when executing a user shell. Note -that, from within zsh itself, this mechanism can be invoked by `tt(ARGV0=sh -zsh ...)'. +tt(sh) or tt(ksh) respectively; more precisely, it looks at the first +letter of the name by which it was invoked, excluding any initial `tt(r)' +(assumed to stand for `restricted'), and if that is `tt(s)' or `tt(k)' it +will emulate bf(sh) or bf(ksh). Furthermore, if invoked as tt(su) (which +happens on certain systems when the shell is executed by the tt(su) +command), the shell will try to find an alternative name from the tt(SHELL) +environment variable and perform emulation based on that. -In this emulation mode, the following +In bf(sh) and bf(ksh) compatibility modes the following parameters are not special and not initialized by the shell: tt(ARGC), tt(argv), |