incubator
Guru
Joined: 05 Jun 2003
Posts: 584
Location: Belgium
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 Posted: Tue Sep 16, 2003 11:26 pm Post subject: [C] Since when do I have files of an unknown type?? |
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I have been trying to create something that deletes a directory and everything in it (as long as you have the permissions for it of course) but I am trying to detect wich element of a directory is a subdirectory or a regular file.
I have tried either by checking the d_type member variable of the dirent struct and check if it is equal to DT_DIR or DT_REG and I have also tried to use the S_ISDIR() macro that requires a stat struct. The first returns true on DT_UNKNOWN and the latter method returns -1 when executing the stat function.
Here is my code, (I cleaned up a ton of debug info for easier reading)
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#include <stdio.h>
#include <dirent.h>
#include <errno.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
void ClearDir(char* name);
int main(int argc, char* argv[])
{
if (argc == 2) {
char* dirname = argv[1];
ClearDir(dirname);
} else {
printf("Usage: killdir <dirname>\n");
printf("removes directory located in current working directory");
exit(1);
}
return 0;
}
void ClearDir(char* name) {
DIR* pDir = NULL;
struct dirent* dirent_dir;
char path[256];
pDir = opendir(name);
switch (errno) {
case ENOENT :
printf("Directory %s not found\n", name);
exit(1);
case ENOMEM :
printf("Not enough memory");
exit(1);
}
// while the read element of dirname is not NULL
while ((dirent_dir = readdir(pDir)) != NULL) {
if (strcmp(dirent_dir->d_name, ".") && strcmp(dirent_dir->d_name, "..")) {
sprintf(path, "%s/%s", name, dirent_dir->d_name);
if (dirent_dir->d_type == DT_DIR) { // if dir, append dirname to path so this can be used for recursive function
ClearDir(path);
} else {
unlink(path);
switch (errno) {
case EACCES :
printf("Acces denied for file %s", path);
exit(1);
case ENOENT :
printf("There is no such file or directory %s", path);
exit(1);
default: break;
} // end switch
} // end if
} // end if
} // end while
closedir(pDir);
rmdir(name); // remove the dir you just emptied
if (errno == ENOTEMPTY) {
printf("directory %s is not empty", name);
exit(1);
}
}
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has anyone else experienced problems with this? Or is there a fix for it? |
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