HI,
Ich hab' in der runvdr, die der installationsscript, den man hier saugen kann, folgende Zeilen entdeckt:
Den Rest hinter den zwei "&&" ist mir schon klar, aber was besagt dieses -e? Hab hierzu keine Beschreibung gefunden, vielleicht kennr sich ja da einer aus ...
TTYL - Django
das ist ein test ob das device existiert.
-e heißt glaube ich "exists". da gibts noch mehr test, ich kenne dir nur von perl.
die [ ] (eckigen-klammern) sind eine abkürzung für das unix-kommando test.
Hallo,
ja. es wird geschaut ob file schon existiert.
aus "man bash":
-a file
True if file exists.
-b file
True if file exists and is a block special file.
-c file
True if file exists and is a character special
file.
-d file
True if file exists and is a directory.
-e file
True if file exists.
-f file
True if file exists and is a regular file.
-g file
True if file exists and is set-group-id.
-h file
True if file exists and is a symbolic link.
-k file
True if file exists and its ``sticky'' bit is set.
-p file
True if file exists and is a named pipe (FIFO).
-r file
True if file exists and is readable.
-s file
True if file exists and has a size greater than
zero.
-t fd True if file descriptor fd is open and refers to a
terminal.
-u file
True if file exists and its set-user-id bit is set.
-w file
True if file exists and is writable.
-x file
True if file exists and is executable.
-O file
True if file exists and is owned by the effective
user id.
-G file
True if file exists and is owned by the effective
group id.
-L file
True if file exists and is a symbolic link.
-S file
True if file exists and is a socket.
-N file
-z string
True if the length of string is zero.
-n string
string True if the length of string is non-zero.
string1 == string2
True if the strings are equal. = may be used in
place of ==.
string1 != string2
True if the strings are not equal.
string1 < string2
True if string1 sorts before string2 lexicographi-
cally in the current locale.
string1 > string2
True if string1 sorts after string2 lexicographi-
cally in the current locale.
arg1 OP arg2
OP is one of -eq, -ne, -lt, -le, -gt, or -ge.
These arithmetic binary operators return true if
arg1 is equal to, not equal to, less than, less
than or equal to, greater than, or greater than or
equal to arg2, respectively. Arg1 and arg2 may be
positive or negative integers.
Gruß,
genka
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