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Top Forums Shell Programming and Scripting how to check to see if a file exists? Post 302575125 by astropi on Sunday 20th of November 2011 03:56:49 PM
Old 11-20-2011
how to check to see if a file exists?

I want to write a script to see if various files exist. What I want to do is have the script search in various directories if a file exist, and if not, then output something like "/path/file does not exist". I don't actually know of how to check and see if a file exists or not. What I have in mind is something like this:

Code:
cd /path/.../
if [file does NOT exists]
echo "/path/.../" >> bad.txt
fi

How would I check and see if a file exists? Thanks for any help!
 

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mkpath_np(3)						   BSD Library Functions Manual 					      mkpath_np(3)

NAME
mkpath_np -- Auxiliary routine for efficiently creating paths SYNOPSIS
#include <unistd.h> int mkpath_np(const char * path, mode_t omode); DESCRIPTION
This routine allows the caller to create a path, including intermediate directories. It is equivalent to calling mkdir(1) with the -p com- mand line argument. Intermediate directories are created with permission bits of rwxrwxrwx (0777) as modified by the current umask, plus write and search permis- sion for the owner. The leaf directory is created with permission bits of omode as modified by the current umask. RETURN VALUES
A 0 return value indicates success. If an error occurs, the return value is a non-zero error code. Note that EEXIST is returned iff the leaf directory already exists and is a directory, so under certain circumstances, this error value may not indicate a failure state. This routine does NOT modify errno. ERRORS
Any error code that can be returned by mkdir(2) can be returned by mkpath_np(), but mkpath_np() will return the error code rather than set- ting errno. [ENOTDIR] A component of the path is not a directory (in contrast to mkdir(2) which returns this based on the path prefix rather than the path). [EEXIST] The path already exists and is a directory. HISTORY
This function first appeared in iOS 5.0. SEE ALSO
mkdir(1), chmod(2), mkdir(2) Mac OS X July 13, 2011 Mac OS X
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