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/* ISC license. */
#include <sys/types.h>
#include <skalibs/sgetopt.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/bytestr.h>
#include <skalibs/strerr2.h>
#include <skalibs/stralloc.h>
#include <skalibs/djbunix.h>
#define USAGE "s6-basename [ -n ] file [ suffix ]"
int main (int argc, char const *const *argv)
{
stralloc sa = STRALLOC_ZERO ;
int nl = 1 ;
PROG = "s6-basename" ;
{
subgetopt_t l = SUBGETOPT_ZERO ;
for (;;)
{
register int opt = subgetopt_r(argc, argv, "n", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 'n' : nl = 0 ; break ;
default : strerr_dieusage(100, USAGE) ;
}
}
argc -= l.ind ; argv += l.ind ;
}
if (!argc) strerr_dieusage(100, USAGE) ;
if (!sabasename(&sa, argv[0], str_len(argv[0])))
strerr_diefu2sys(111, "get basename of ", argv[0]) ;
if (argc >= 2)
{
size_t n = str_len(argv[1]) ;
if ((n < sa.len) && !byte_diff(argv[1], n, sa.s + sa.len - n))
sa.len -= n ;
}
if (nl && !stralloc_catb(&sa, "\n", 1))
strerr_diefu2sys(111, "get basename of ", argv[0]) ;
if (allwrite(1, sa.s, sa.len) < sa.len)
strerr_diefu1sys(111, "write to stdout") ;
return 0 ;
}
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