From c175751b501a3a4cb40ad4787340a597ea769be4 Mon Sep 17 00:00:00 2001 From: Tanaka Akira Date: Thu, 15 Apr 1999 18:05:35 +0000 Subject: Initial revision --- Doc/Zsh/cond.yo | 158 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 158 insertions(+) create mode 100644 Doc/Zsh/cond.yo (limited to 'Doc/Zsh/cond.yo') diff --git a/Doc/Zsh/cond.yo b/Doc/Zsh/cond.yo new file mode 100644 index 000000000..0ff49b187 --- /dev/null +++ b/Doc/Zsh/cond.yo @@ -0,0 +1,158 @@ +texinode(Conditional Expressions)(Compatibility)(Arithmetic Evaluation)(Top) +chapter(Conditional Expressions) +ifzman(\ +sect(Conditional Expressions) +)\ +cindex(conditional expressions) +cindex(expressions, conditional) +A em(conditional expression) is used with the tt([[) +compound command to test attributes of files and to compare strings. +Each expression can be constructed from one or more +of the following unary or binary expressions: + +startitem() +item(tt(-a) var(file))( +true if var(file) exists. +) +item(tt(-b) var(file))( +true if var(file) exists and is a block special file. +) +item(tt(-c) var(file))( +true if var(file) exists and is a character special file. +) +item(tt(-d) var(file))( +true if var(file) exists and is a directory. +) +item(tt(-e) var(file))( +true if var(file) exists. +) +item(tt(-f) var(file))( +true if var(file) exists and is a regular file. +) +item(tt(-g) var(file))( +true if var(file) exists and has its setgid bit set. +) +item(tt(-h) var(file))( +true if var(file) exists and is a symbolic link. +) +item(tt(-k) var(file))( +true if var(file) exists and has its sticky bit set. +) +item(tt(-n) var(string))( +true if length of var(string) is non-zero. +) +item(tt(-o) var(option))( +true if option named var(option) is on. var(option) +may be a single character, in which case it is a single letter option name. +(See noderef(Specifying Options).) +) +item(tt(-p) var(file))( +true if var(file) exists and is a FIFO special file (named pipe). +) +item(tt(-r) var(file))( +true if var(file) exists and is readable by current process. +) +item(tt(-s) var(file))( +true if var(file) exists and has size greater than zero. +) +item(tt(-t) var(fd))( +true if file descriptor number var(fd) +is open and associated with a terminal device. +(note: var(fd) is not optional) +) +item(tt(-u) var(file))( +true if var(file) exists and has its setuid bit set. +) +item(tt(-w) var(file))( +true if var(file) exists and is writable by current process. +) +item(tt(-x) var(file))( +true if var(file) exists and is executable by current process. +If var(file) exists and is a directory, then the current process +has permission to search in the directory. +) +item(tt(-z) var(string))( +true if length of var(string) is zero. +) +item(tt(-L) var(file))( +true if var(file) exists and is a symbolic link. +) +item(tt(-O) var(file))( +true if var(file) exists and is owned by the effective user ID of this process. +) +item(tt(-G) var(file))( +true if var(file) exists and its group matches +the effective group ID of this process. +) +item(tt(-S) var(file))( +true if var(file) exists and is a socket. +) +item(tt(-N) var(file))( +true if var(file) exists and its access time is +not newer than its modification time. +) +item(var(file1) tt(-nt) var(file2))( +true if var(file1) exists and is newer than var(file2). +) +item(var(file1) tt(-ot) var(file2))( +true if var(file1) exists and is older than var(file2). +) +item(var(file1) tt(-ef) var(file2))( +true if var(file1) and var(file2) exist and refer to the same file. +) +xitem(var(string) tt(=) var(pattern)) +item(var(string) tt(==) var(pattern))( +true if var(string) matches var(pattern). +The `tt(==)' form is the preferred one. The `tt(=)' form is for +backward compatibility and should be considered obsolete. +) +item(var(string) tt(!=) var(pattern))( +true if var(string) does not match var(pattern). +) +item(var(string1) tt(<) var(string2))( +true if var(string1) comes before var(string2) +based on ASCII value of their characters. +) +item(var(string1) tt(>) var(string2))( +true if var(string1) comes after var(string2) +based on ASCII value of their characters. +) +item(var(exp1) tt(-eq) var(exp2))( +true if var(exp1) is numerically equal to var(exp2). +) +item(var(exp1) tt(-ne) var(exp2))( +true if var(exp1) is numerically not equal to var(exp2). +) +item(var(exp1) tt(-lt) var(exp2))( +true if var(exp1) is numerically less than var(exp2). +) +item(var(exp1) tt(-gt) var(exp2))( +true if var(exp1) is numerically greater than var(exp2). +) +item(var(exp1) tt(-le) var(exp2))( +true if var(exp1) is numerically less than or equal to var(exp2). +) +item(var(exp1) tt(-ge) var(exp2))( +true if var(exp1) is numerically greater than or equal to var(exp2). +) +item(tt(LPAR()) var(exp) tt(RPAR()))( +true if var(exp) is true. +) +item(tt(!) var(exp))( +true if var(exp) is false. +) +item(var(exp1) tt(&&) var(exp2))( +true if var(exp1) and var(exp2) are both true. +) +item(var(exp1) tt(||) var(exp2))( +true if either var(exp1) or var(exp2) is true. +) +enditem() + +In each of the above expressions, if +var(file) is of the form `tt(/dev/fd/)var(n)', +where var(n) is an integer, +then the test applied to the open file whose +descriptor number is var(n), +even if the underlying system does not support +the tt(/dev/fd) directory. -- cgit 1.4.1