1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
/* ISC license. */
#include <skalibs/allreadwrite.h>
#include <skalibs/sgetopt.h>
#include <skalibs/types.h>
#include <skalibs/strerr2.h>
#include <skalibs/stralloc.h>
#include <skalibs/skamisc.h>
#include <skalibs/random.h>
#define USAGE "s6-uniquename [ -n randomlen ] prefix"
#define usage() strerr_dieusage(100, USAGE)
int main (int argc, char const *const *argv)
{
stralloc sa = STRALLOC_ZERO ;
unsigned int n = 8 ;
PROG = "s6-uniquename" ;
{
subgetopt l = SUBGETOPT_ZERO ;
for (;;)
{
int opt = subgetopt_r(argc, argv, "n:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 'n' : if (!uint0_scan(l.arg, &n)) usage() ; break ;
default : usage() ;
}
}
argc -= l.ind ; argv += l.ind ;
}
if (argc < 1) usage() ;
if (!random_init())
strerr_diefu1sys(111, "init random generator") ;
if (!stralloc_cats(&sa, argv[0])) strerr_diefu1sys(111, "stralloc_cats") ;
if (!(n ? random_sauniquename(&sa, n) : sauniquename(&sa)))
strerr_diefu1sys(111, "make unique name") ;
if (!stralloc_catb(&sa, "\n", 1)) strerr_diefu1sys(111, "stralloc_cats") ;
if (allwrite(1, sa.s, sa.len) < sa.len) strerr_diefu1sys(111, "write to stdout") ;
return 0 ;
}
|
