CODEWITHSUNDEEP
c++unix
shakirgooty
shakirgooty

Reputation: 134

is there any function in c++ to check whether a file given in a specific path is a script(.sh) file or not

there is .sh file in one of the directories for eg: path = /opt/WD/CD/SCD/temp.sh

is there any function is c++ to check whether file in that location(path) is a script(.sh) file or not

bool ValidCommand(const string & path)
{
bool return = true;

    {
    if (!access(path.c_str(),X_OK))
    {
        return = true;
    }
    else
        return = false;
 }

path = /opt/WD/CD/SCD/temp.sh

access is not working for me:(

Upvotes: 1

Views: 84

Answers (4)

James Kanze
James Kanze

Reputation: 153899

Just how precise do you want it. It's fairly straightforward to read the directory and look for filenames ending in .sh. (boost::filesystem has everything you need for that.) But of course, I could name my C++ headers file.sh if I wanted (and was a bit perverse). A considerably more accurate test would involve reading the start of the file: if the first two bytes are "#!", it's probably a script of some sort, and if the first line matches "#!\\s*(?:/usr)?/bin/sh/[a-z]*sh", then you're almost sure it's a shell script. Drop the [a-z]*, and it's a Bourne or a Posix shell script.

Upvotes: 0

sehe
sehe

Reputation: 392833

Have a look at

  • stat -- to check the executable bit
  • libmagic -- to detect file type from (a.o.) the hash-bang line

Upvotes: 1

Shahbaz
Shahbaz

Reputation: 47493

You can use stat. If it failed (returned -1), the file doesn't exist.

Upvotes: 0

Mark B
Mark B

Reputation: 96233

Maybe stat does what you need, otherwise you can look at the source for file and see how it does it.

Upvotes: 0

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