Function for creating all the folders in a path automatically

mkdirp.c

#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <errno.h>

int mkdirp(const char *path, mode_t mode)
{
	char *pos, *base;
	char **dirs;
	int i, len, dircount, res;

	// Count the number of directories in path
	dircount = 0;
	for (i = 0; path[i] != '\0'; i++) {
		if (path[i] == '/') {
			dircount++;
		}
	}

	/*
	Break down path backwards and store the result in
	an array.
	
	For example, for path = /foo/bar/baz we get:
	/foo/bar
	/foo
	*/
	base = (char*)path;
	dirs = (char**)malloc(sizeof(char*) * (dircount+1));
	memset(dirs, '\0', sizeof(char*) * (dircount+1));

	i = 0;
	while ((pos = strrchr(base, '/')) != NULL) {
		len = pos - base;
		if (len == 0) {
			dirs[i] = NULL;
			break;
		}

		dirs[i] = (char*)malloc(sizeof(char*) * (len + 1));
		strncpy(dirs[i], base, len);
		dirs[i][len] = '\0';

		base = dirs[i];

		i++;
	}

	// Save the number of real directories found 
	dircount = i;

	// Create the directories
	res = 0;
	for (; i >= 0; i--) {
		if (dirs[i] == NULL) {
			continue;
		}

		if (!mkdir(dirs[i], mode)) {
			continue;
		} 

		if (errno == EEXIST) {
			continue;
		}

		res = -1;
		break;
	}

	// If the path didn't end with /, the last directory got dropped
	// and wasn't created
	if (mkdir(path, mode)) {
		res = -1;
	}

	// Free used memory
	for (i = 0; i < dircount; i++) {
		if (dirs[i] == NULL) {
			continue;
		}

		free(dirs[i]);
	}

	free(dirs);

	return res;
}

int main(int argc, char** argv)
{
	if (argc != 2) {
		return 1;
	}

	if (mkdirp(argv[1], 0777) == -1) {
		perror("mkdirp");
	}

	return 0;
}