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Full Discussion: Can anyone explain plz
Top Forums UNIX for Advanced & Expert Users Can anyone explain plz Post 302112244 by r_W213 on Tuesday 27th of March 2007 02:34:23 AM
Old 03-27-2007
Can anyone explain plz

HI,

Can anyone explain to me how does the following command work - >

current_dir=`cd \`/usr/bin/dirname $0\` && pwd`

Regards,
Ranga
 

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BASENAME(1)						    BSD General Commands Manual 					       BASENAME(1)

NAME
basename, dirname -- return filename or directory portion of pathname SYNOPSIS
basename string [suffix] basename [-a] [-s suffix] string [...] dirname string [...] DESCRIPTION
The basename utility deletes any prefix ending with the last slash '/' character present in string (after first stripping trailing slashes), and a suffix, if given. The suffix is not stripped if it is identical to the remaining characters in string. The resulting filename is written to the standard output. A non-existent suffix is ignored. If -a is specified, then every argument is treated as a string as if basename were invoked with just one argument. If -s is specified, then the suffix is taken as its argument, and all other arguments are treated as a string. The dirname utility deletes the filename portion, beginning with the last slash '/' character to the end of string (after first stripping trailing slashes), and writes the result to the standard output. EXIT STATUS
The basename and dirname utilities exit 0 on success, and >0 if an error occurs. EXAMPLES
The following line sets the shell variable FOO to /usr/bin. FOO=`dirname /usr/bin/trail` SEE ALSO
csh(1), sh(1), basename(3), dirname(3) STANDARDS
The basename and dirname utilities are expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. BSD
April 18, 1994 BSD
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