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Are you just interested in the actual file name or the file structure?<br />
<br />
if filename then you could use command line arguments since the first argument is the filename. &nbsp;Then you could use strtok or strstr to point to the &quot;.&quot; and pull in the extension.<br />
<br />
if structure, then my reference says that the first word of an executable file should be EXE program identifier. &nbsp;It lists this value as being 5A4DH. &nbsp;It's not clear to me if this is a sample value or always the case.<br />
<br />
Matt<br />

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Are you just interested in the actual file name or the file structure?

if filename then you could use command line arguments since the first argument is the filename.  Then you could use strtok or strstr to point to the "." and pull in the extension.

if structure, then my reference says that the first word of an executable file should be EXE program identifier.  It lists this value as being 5A4DH.  It's not clear to me if this is a sample value or always the case.

Matt


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It depends on your OS. Which OS do you use?<br />

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It depends on your OS. Which OS do you use?


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That's always the case for a EXE<br />

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Let me be specific in telling the things. Following assumptions are made:<br />
<br />
OS: Unix<br />
File Name: /usr/home/stc/friend<br />
Language: C<br />
<br />
main ()<br />
{<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;char file_name[][] = &quot;/usr/home/stc/friend&quot;<br />
<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Here I want to know whether the file in file_name variable is executable or not. How to do this? <br />
} /* end of mail () */<br />

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Let me be specific in telling the things. Following assumptions are made:

OS: Unix
File Name: /usr/home/stc/friend
Language: C

main ()
{
      char file_name[][] = "/usr/home/stc/friend"

      Here I want to know whether the file in file_name variable is executable or not. How to do this?
} /* end of mail () */


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You'll have more luck posting in the UNIX Programming topic area.<br />

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You'll have more luck posting in the UNIX Programming topic area.


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In a C program, How it is possible to know that a particular file is executable?
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In a C program, How it is possible to know that a particular file is executable?

executable file

C is a general-purpose, imperative computer programming language, supporting structured programming, lexical variable scope and recursion, while a static type system prevents many unintended operations. By design, C provides constructs that map efficiently to typical machine instructions, so it has found lasting use in applications that had formerly been coded in assembly language, including operating systems as well as various application software for computers ranging from supercomputers to embedded systems. It is distinct from C++ (which has its roots in C) and C#, and many later languages have borrowed directly or indirectly from C.