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#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <limits.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dirent.h>
#ifdef _WIN32
#include <windows.h>
#include <shlwapi.h>
#endif
#include "fs.h"
#ifdef _WIN32
#define mkdir(path, perm) mkdir(path)
#endif
static struct stat getStat(const char* path)
{
// fill with 0s by default in the case stat fails
struct stat sb = {0};
// the return value signifies if stat failes (e.g. file not found)
// unimportant for us if it fails it won't touch sb
stat(path, &sb);
return sb;
}
int isFile(const char* path)
{
struct stat sb = getStat(path);
#ifndef _WIN32
if (S_ISLNK(sb.st_mode))
{
char buf[PATH_MAX];
readlink(path, buf, sizeof(buf));
return isFile(buf);
}
#endif
return S_ISREG(sb.st_mode);
}
int isDir(const char* path)
{
struct stat sb = getStat(path);
#ifndef _WIN32
if (S_ISLNK(sb.st_mode))
{
char buf[PATH_MAX];
readlink(path, buf, sizeof(buf));
return isDir(buf);
}
#endif
return S_ISDIR(sb.st_mode);
}
int isRelativePath(const char* path)
{
if (!path)
return 0;
else if (*path == *OS_PATH_SEP)
return 0;
#ifdef _WIN32
else if (!PathIsRelativeA(path))
return 0;
#endif
return 1;
}
int leavesRelativePath(const char* path)
{
if (!path || !isRelativePath(path))
return 0;
int depth = 0;
const char* head = path;
const char* tail = head;
while (*tail)
{
++tail;
if (*tail == *OS_PATH_SEP || *tail == '\0')
{
size_t size = (size_t)(tail-head);
if (!size)
continue;
else if (!strncmp(head, "..", size))
depth -= 1;
else if (strncmp(head, ".", size))
depth += 1;
if (depth < 0)
return 1;
head = tail + 1;
}
}
return 0;
}
char* normalizeUnixPath(char* path)
{
char* head = path;
if (head)
{
while (*head)
{
if (*head == '/')
*head = *OS_PATH_SEP;
++head;
}
}
return path;
}
int makeDir(const char* path)
{
char pathcpy[PATH_MAX];
char *index;
strncpy(pathcpy, path, PATH_MAX-1); // make a mutable copy of the path
for(index = pathcpy+1; *index; ++index)
{
if (*index == *OS_PATH_SEP)
{
*index = '\0';
if (mkdir(pathcpy, 0755) != 0)
{
if (errno != EEXIST)
return -1;
}
*index = *OS_PATH_SEP;
}
}
return mkdir(path, 0755);
}
int removeDir(const char* path)
{
DIR *d = opendir(path);
size_t path_len = strlen(path);
int r = -1;
if (d) {
struct dirent *p;
r = 0;
while (!r && (p = readdir(d))) {
char *buf;
size_t len;
// Skip the names "." and ".." as we don't want to recurse on them.
if (!strcmp(p->d_name, ".") || !strcmp(p->d_name, ".."))
continue;
len = path_len + strlen(p->d_name) + 2;
buf = malloc(len);
if (buf) {
struct stat statbuf = {0};
snprintf(buf, len, "%s/%s", path, p->d_name);
if (!stat(buf, &statbuf)) {
if (S_ISDIR(statbuf.st_mode))
r = removeDir(buf);
#ifndef _WIN32
else if (S_ISLNK(statbuf.st_mode))
r = unlink(buf);
#endif
else
r = remove(buf);
}
else // it is very likely that we found a dangling symlink which is not detected by stat
{
r = unlink(buf);
}
free(buf);
}
}
closedir(d);
}
if (!r)
r = rmdir(path);
return r;
}
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