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#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dirent.h>
#include <errno.h>
// Does this file exist? Returns false for directories.
static bool fs_file_exists(char const *path) {
struct stat statbuf = {0};
if (stat(path, &statbuf) != 0)
return false;
return S_ISREG(statbuf.st_mode);
}
// Returns a NULL-terminated array of the files/directories in this directory, or NULL if the directory does not exist.
// When you're done with the file names, call free on each one, then on the array.
// NOTE: The files aren't returned in any particular order!
static char **fs_list_directory(char const *dirname) {
char **ret = NULL;
DIR *dir = opendir(dirname);
if (dir) {
struct dirent *ent;
char **filenames = NULL;
size_t nentries = 0;
size_t filename_idx = 0;
while (readdir(dir)) ++nentries;
rewinddir(dir);
filenames = (char **)calloc(nentries+1, sizeof *filenames);
while ((ent = readdir(dir))) {
char const *filename = ent->d_name;
size_t len = strlen(filename);
char *filename_copy = (char *)malloc(len+1);
if (!filename_copy) break;
strcpy(filename_copy, filename);
if (filename_idx < nentries) // this could actually fail if someone creates files between calculating nentries and here.
filenames[filename_idx++] = filename_copy;
}
ret = filenames;
closedir(dir);
}
return ret;
}
static int fs_mkdir(char const *path) {
if (mkdir(path, 0755) == 0) {
// directory created successfully
return 1;
} else if (errno == EEXIST) {
struct stat statbuf = {0};
if (stat(path, &statbuf) == 0) {
if (S_ISDIR(statbuf.st_mode)) {
// already exists, and it's a directory
return 0;
} else {
// already exists, but not a directory
return -1;
}
} else {
return -1;
}
} else {
return -1;
}
}
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