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#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <sys/stat.h>
static int usage()
{
fprintf(stderr,"mkdir [OPTION] <target>\n");
fprintf(stderr," --help display usage and exit\n");
fprintf(stderr," -p, --parents create parent directories as needed\n");
return -1;
}
int main(int argc, char *argv[])
{
int ret;
if(argc < 2 || strcmp(argv[1], "--help") == 0) {
return usage();
}
int recursive = (strcmp(argv[1], "-p") == 0 ||
strcmp(argv[1], "--parents") == 0) ? 1 : 0;
if(recursive && argc < 3) {
// -p specified without a path
return usage();
}
if(recursive) {
argc--;
argv++;
}
char currpath[PATH_MAX], *pathpiece;
struct stat st;
while(argc > 1) {
argc--;
argv++;
if(recursive) {
// reset path
strcpy(currpath, "");
// create the pieces of the path along the way
pathpiece = strtok(argv[0], "/");
if(argv[0][0] == '/') {
// prepend / if needed
strcat(currpath, "/");
}
while(pathpiece != NULL) {
if(strlen(currpath) + strlen(pathpiece) + 2/*NUL and slash*/ > PATH_MAX) {
fprintf(stderr, "Invalid path specified: too long\n");
return 1;
}
strcat(currpath, pathpiece);
strcat(currpath, "/");
if(stat(currpath, &st) != 0) {
ret = mkdir(currpath, 0777);
if(ret < 0) {
fprintf(stderr, "mkdir failed for %s, %s\n", currpath, strerror(errno));
return ret;
}
}
pathpiece = strtok(NULL, "/");
}
} else {
ret = mkdir(argv[0], 0777);
if(ret < 0) {
fprintf(stderr, "mkdir failed for %s, %s\n", argv[0], strerror(errno));
return ret;
}
}
}
return 0;
}
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