collecting stat info from a module

This is a discussion on collecting stat info from a module within the C Programming forums, part of the General Programming Boards category; I have a pgm calling a function in a module. The program is to pass a file name to the ...

  1. #1
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    collecting stat info from a module

    I have a pgm calling a function in a module.

    The program is to pass a file name to the module function - and then the module function will collect the stat information and return the stat info to the calling program.

    I have written the following in my calling pgm:

    Code:
    struct stat file_info;
    
    &file_info = statfile(filename);
    and then in my module function:

    Code:
    file_info statfile(name_type filename) {
          stat(filename, &file_info);
          return(file_info); }
    I am getting a compile error saying:
    incompatible types in return

    Can anyone suggest a solution?
    Sue

  2. #2
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    Code:
    file_info statfile(name_type filename) {
          stat(filename, &file_info);
          return(file_info); }
    It looks as if you are declaring a function that returns type file_info. Therefore, "&file_info" doesnt really make any sense in the stat() call. It is analogous to calling some function funct(&int), which may be the case in your situation but I doubt it. Also, returning file_info is not very meaninful either. Or I am an idiot and/or am intepreting your code incorrectly...
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  3. #3
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    No - I think I am the idiot here!!

    The calling pgm has the requirement to collect stat information for selected files and write the information to another file.

    So - I thought I would call the initial pgm and pass the file name in as a command parameter.

    Then pass the parameter to the function in the module - which should collect the stat info - and pass it back to the calling pgm - which then copies it to the fields in the output file.

    Am I making hard work of this?

    Is there another way?

    Should I just call the function in the module and move all my other code (ie the field copies, and file writes) into the module?

    Your thoughts would be appreciated...
    Thanks
    Sue

  4. #4
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    I dont think you really need to put the stat() call in a seperate function of its own. Here's some sample code for you to review and amend to suit:
    Code:
    #include <stdio.h>
    #include <sys/types.h>
    #include <sys/stat.h>
    
    int main(int argc, char *argv[])
    {
    	struct stat mystat;
    	
    	if (argc != 2)
    	{
    		printf("Invalid args\n");
    		return(1);
    	}
    	
    	if (stat(argv[1], &mystat) == -1)
    	{
    		perror(argv[1]);
    		return (1);
    	}
    	
    	printf("stat worked, is ");
    	
    	if (S_ISREG(mystat.st_mode))		// can be done better
    		printf("a regular file\n");
    	else
    		printf("not a regular file\n");
    	return (0);
    }
    When all else fails, read the instructions.
    If you're posting code, use code tags: [code] /* insert code here */ [/code]

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