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Diffstat (limited to 'Doc/Zsh/compat.yo')
| -rw-r--r-- | Doc/Zsh/compat.yo | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/Doc/Zsh/compat.yo b/Doc/Zsh/compat.yo index a1ebd5411..26f8fe896 100644 --- a/Doc/Zsh/compat.yo +++ b/Doc/Zsh/compat.yo @@ -7,7 +7,19 @@ 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. In this mode the following +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 ...)'. + +In this emulation mode, the following parameters are not special and not initialized by the shell: tt(ARGC), tt(argv), |