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Top Forums Shell Programming and Scripting To check whether a directory is exist and if it is not, create it Post 302238523 by Gee-Money on Saturday 20th of September 2008 01:08:07 PM
Old 09-20-2008
[ -d /some/directory ] || mkdir /some/directory


"-d" checks to see if a directory exists, the "||" means if the prior test fails do the next action, in this case, make the directory.
 

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SHTOOL-MKDIR.TMP(1)					      GNU Portable Shell Tool					       SHTOOL-MKDIR.TMP(1)

NAME
shtool-mkdir - GNU shtool mkdir(1) style command SYNOPSIS
shtool mkdir [-t|--trace] [-f|--force] [-p|--parents] [-m|--mode mode] [-o|--owner owner] [-g|--group group] dir [dir ...] DESCRIPTION
This is a mkdir(1) style command with additional options and the ability to be smart if the directory already exists which is important for installation procedures. OPTIONS
The following command line options are available. -t, --trace Shows the actually involved shell commands. -f, --force Forced continuation and no complaints if directory already exists. Default is to terminate with error. -p, --parents Automatic parent directory creation. Default is to only create the last directory in the path and fail if parents are missing. -m, --mode mode The directory mode applied to the directory, see chmod(1). Omitting mode skips this step and leaves the operating system default which is usually based on umask(1). Some directory modes require superuser privileges to be set. Default is to stick with operating system defaults. -o, --owner owner The directory owner name or id applied to the directory, see chown(1). This option requires superuser privileges to execute. Default is to skip this step and leave the operating system default which is usually based on the executing uid or the parent setuid directory. -g, --group group The directory group name or id applied to the directory, see chgrp(1). This option requires superuser privileges to execute to the fullest extend, otherwise the choice of group is limited on most operating systems. Default is to skip this step and leave the operating system default which is usually based on the executing gid or the parent setgid directory. EXAMPLE
# Makefile install: shtool mkdir -f -p -m 755 $(bindir) shtool mkdir -f -p -m 755 $(mandir)/man1 : HISTORY
The GNU shtool mkdir command was originally written for Public Domain by Noah Friedman and later revised by Ralf S. Engelschall <rse@engelschall.com> in 1999 for inclusion into GNU shtool. SEE ALSO
shtool(1), mkdir(1). 18-Jul-2008 shtool 2.0.8 SHTOOL-MKDIR.TMP(1)
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