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	mkdir.c - 9base - revived minimalist port of Plan 9 userland to Unix
	git clone git://git.suckless.org/9base
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	---
	mkdir.c (1026B)
	---
	1 #include <u.h>
	2 #include <libc.h>
	3
	4 char *e;
	5 ulong mode = 0777L;
	6
	7 void
	8 usage(void)
	9 {
	10 fprint(2, "usage: mkdir [-p] [-m mode] dir...\n");
	11 exits("usage");
	12 }
	13
	14 int
	15 makedir(char *s)
	16 {
	17 int f;
	18
	19 if(access(s, AEXIST) == 0){
	20 fprint(2, "mkdir: %s already exists\n", s);
	21 e = "error";
	22 return -1;
	23 }
	24 f = create(s, OREAD, DMDIR \| mode);
	25 if(f < 0){
	26 fprint(2, "mkdir: can't create %s: %r\n", s);
	27 e = "error";
	28 return -1;
	29 }
	30 close(f);
	31 return 0;
	32 }
	33
	34 void
	35 mkdirp(char *s)
	36 {
	37 char *p;
	38
	39 for(p=strchr(s+1, '/'); p; p=strchr(p+1, '/')){
	40 *p = 0;
	41 if(access(s, AEXIST) != 0 && makedir(s) < 0)
	42 return;
	43 *p = '/';
	44 }
	45 if(access(s, AEXIST) != 0)
	46 makedir(s);
	47 }
	48
	49
	50 void
	51 main(int argc, char *argv[])
	52 {
	53 int i, pflag;
	54 char *m;
	55
	56 pflag = 0;
	57 ARGBEGIN{
	58 default:
	59 usage();
	60 case 'm':
	61 m = ARGF();
	62 if(m == nil)
	63 usage();
	64 mode = strtoul(m, &m, 8);
	65 if(mode > 0777)
	66 usage();
	67 break;
	68 case 'p':
	69 pflag = 1;
	70 break;
	71 }ARGEND
	72
	73 for(i=0; i<argc; i++){
	74 if(pflag)
	75 mkdirp(argv[i]);
	76 else
	77 makedir(argv[i]);
	78 }
	79 exits(e);
	80 }