What's wrong with this simple program in APUE? Post: 302382143

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Top Forums UNIX for Dummies Questions & Answers What's wrong with this simple program in APUE? Post 302382143 by cqlouis on Tuesday 22nd of December 2009 09:49:54 AM

12-22-2009

Registered User

What's wrong with this simple program in APUE?

I start wetting my toes in Linux programming.
I tried the first program myls.c in Advanced Programming in the Unix Environment.

Code:

#include <sys/types.h>
#include <dirent.h>              
#include "apue.h"

int main(int argc, char *argv[]) 
{
    DIR *dp;                     
    struct dirent *dirp;       

    if (argc != 2)
        err_quit("a single argument (the directory name) is required");

    if ((dp = opendir(argv[1])) == NULL)  

        err_sys("can't open %s", argv[1]);

    while ((dirp = readdir(dp)) != NULL){
            printf("%s\n", dirp->d_name);
        }

    closedir(dp);
    exit(0);                    
}

The book says that this code displays the files under somewhat directory.

but my result is:

Code:

[abc@manager apue]$ ls -la apue.src/
total 12
drwxr-xr-x  3 abc box 4096 12-21 15:57 .
drwxr-xr-x  3 abc box 4096 12-21 21:00 ..
drwxr-xr-x 32 abc box 4096 12-21 15:58 apue.2e
[abc@manager apue]$ ./myls apue.src/
6299739
6299771
6299795
[liurui@manager apue]$

why my result is numbers rather than the name of files？

my platform is RHEL 5.0.

cqlouis

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LEARN ABOUT CENTOS

ttk::frame

ttk::frame(n)							 Tk Themed Widget						     ttk::frame(n)

__________________________________________________________________________________________________________________________________________________

NAME

       ttk::frame - Simple container widget

SYNOPSIS

       ttk::frame pathName ?options?
_________________________________________________________________

DESCRIPTION

       A ttk::frame widget is a container, used to group other widgets together.

STANDARD OPTIONS

       -class		     -cursor		  -takefocus
       -style

       See the ttk_widget manual entry for details on the standard options.

WIDGET-SPECIFIC OPTIONS
       [-borderwidth borderWidth]  The desired width of the widget border.  Defaults to 0.  [-relief relief] One of the standard Tk border styles:
       flat, groove, raised, ridge, solid, or sunken.  Defaults to flat.  [-padding padding] Additional padding  to  include  inside  the  border.
       [-width width]  If specified, the widget's requested width in pixels.  [-height height] If specified, the widget's requested height in pix-
       els.

WIDGET COMMAND

       Supports the standard widget commands configure, cget, identify, instate, and state; see ttk::widget(n).

NOTES

       Note that if the pack, grid, or other geometry managers are used to manage the children of the frame, by the GM's requested size will  nor-
       mally take precedence over the frame widget's -width and -height options.  pack propagate and grid propagate can be used to change this.

SEE ALSO

       ttk::widget(n), ttk::labelframe(n), frame(n)

KEYWORDS

       widget, frame, container

Tk									8.5							     ttk::frame(n)

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