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Top Forums Shell Programming and Scripting Copy list of files from a keyword list to another directory Post 302646779 by radoulov on Friday 25th of May 2012 05:05:54 PM
Old 05-25-2012
It's slightly different:
IFS= disables unnecessary word/field splitting
and protects you from loosing leading and trailing IFS characters
(an eventual corner case: usually leading or trailing spaces or tabs).
-r prevent the backslash from escaping special sequences,
-- avoids misinterpretation of file names with leading -.

Consider the following:

Code:
printf '%s\n' ' a\  ' ' a\  ' 'a\:b' 'a\:b'  | {
  read a 
  IFS= read -r b  
  printf 'a --> |%s|\nb --> |%s|\n' "$a" "$b"
  IFS=: read a b
  printf 'a --> |%s|\nb --> |%s|\n' "$a" "$b"
  IFS=: read -r a b
  printf 'a --> |%s|\nb --> |%s|\n' "$a" "$b"
  }

It produces:

Code:
bash-4.1$ printf '%s\n' ' a\  ' ' a\  ' 'a\:b' 'a\:b'  | {
>   read a 
>   IFS= read -r b  
>   printf 'a --> |%s|\nb --> |%s|\n' "$a" "$b"
>   IFS=: read a b
>   printf 'a --> |%s|\nb --> |%s|\n' "$a" "$b"
>   IFS=: read -r a b
>   printf 'a --> |%s|\nb --> |%s|\n' "$a" "$b"
>   }
a --> |a |
b --> | a\  |
a --> |a:b|
b --> ||
a --> |a\|
b --> |b|

Or:

Code:
bash-4.1$ mv -a /tmp/
mv: unknown option -- a
Try `mv --help' for more information.
bash-4.1$ mv -- -a /tmp/
mv: cannot stat `-a': No such file or directory

 

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wsreg_can_access_registry(3WSREG)                   Product Install Registry Library Functions                   wsreg_can_access_registry(3WSREG)

NAME
wsreg_can_access_registry - determine access to product install registry SYNOPSIS
cc [flag ...] file ...-lwsreg [library ...] #include <fcntl.h> #include <wsreg.h> int wsreg_can_access_registry(int access_flag); DESCRIPTION
The wsreg_can_access_registry() function is used to determine what access, if any, an application has to the product install registry. The access_flag argument can be one of the following: O_RDONLY Inquire about read only access to the registry. O_RDWR Inquire about modify (read and write) access to the registry. RETURN VALUES
The wsreg_can_access_registry() function returns non-zero if the specified access level is permitted. A return value of 0 indicates the specified access level is not permitted. EXAMPLES
Example 1: Initialize the registry and determine if access to the registry is permitted. #include <fcntl.h> #include <wsreg.h> int main(int argc, char **argv) { int result; if (wsreg_initialize(WSREG_INIT_NORMAL, NULL)) { printf("conversion recommended, sufficient access denied "); } if (wsreg_can_access_registry(O_RDONLY)) { printf("registry read access granted "); } else { printf("registry read access denied "); } if (wsreg_can_access_registry(O_RDWR)) { printf("registry read/write access granted "); } else { printf("registry read/write access denied "); } } USAGE
The wsreg_initialize(3WSREG) function must be called before calls to wsreg_can_access_registry() can be made. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |Unsafe | +-----------------------------+-----------------------------+ SEE ALSO
wsreg_initialize(3WSREG), attributes(5) SunOS 5.10 22 Sep 2000 wsreg_can_access_registry(3WSREG)
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