ProgrammingThis forum is for all programming questions.
The question does not have to be directly related to Linux and any language is fair game.
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
I'm trying to determine if a file is a directory or not. d_type is 0 for all files I tested it with. Any help is greatly appreciated. I'm running Linux 2.2.17 and I'm using an ext2 fs.
dp=opendir(".");
if (!dp) {
printf("Couldn't open working directory\n");
exit(0);
}
ptrdirstrct=readdir(dp);
do {
printf("%-30.28s",ptrdirstrct->d_name);
/* This never happens. Why? */
if (ptrdirstrct->d_type==DT_DIR)
printf("DIRECTORY,d_type=%d\n",ptrdirstrct->d_type);
else {
printf("NOT A DIRECTORY, d_type=%d\n",ptrdirstrct->d_type);
ptrdirstrct=readdir(dp);
}
} while (ptrdirstrct!=NULL);
from READDIR(3)
According to POSIX, the dirent structure contains a field char d_name[] of unspecified size ...
Use of other fields will harm the portability of your programs.
iac, why not just try to open each entry using opendir().
DIR *dp, *tstdp;
...
tstdp=opendir(ptrdirstrct->d_name);
if(tstdp)
printf("DIRECTORY\n");
else
printf("NOT A DIRECTORY\n");
those two fixes may work great... that is until you come across a symbolic link.
if you want to make use of d_type you have to break POSIX
compliance and #define __USE_BSD somewhere in your program.
consult the dirent.h file in /usr/include for the values
associated with d_type.
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.