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/* ISC license. */
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>
#include <skalibs/posixplz.h>
#include <skalibs/bitarray.h>
#include <s6/ftrigr.h>
#include <s6/supervise.h>
static uint16_t registerit (ftrigr_t *a, char *fn, size_t len, tain const *deadline, tain *stamp)
{
memcpy(fn + len, "/" S6_SUPERVISE_EVENTDIR, sizeof(S6_SUPERVISE_EVENTDIR) + 1) ;
return ftrigr_subscribe(a, fn, "x", 0, deadline, stamp) ;
}
/*
options: bit 0: wait for s6-supervise to exit
*/
int s6_supervise_unlink_names (char const *scdir, char const *const *names, size_t n, uint32_t options, tain const *deadline, tain *stamp)
{
size_t scdirlen = strlen(scdir) ;
size_t ntotal = n ;
unsigned char locked[bitarray_div8(n)] ;
unsigned char logged[bitarray_div8(n)] ;
if (!n) return 0 ;
memset(locked, 0, bitarray_div8(n)) ;
memset(logged, 0, bitarray_div8(n)) ;
if (options & 1) for (size_t i = 0 ; i < n ; i++)
{
struct stat st ;
size_t nlen = strlen(names[i]) ;
int h ;
char fn[scdirlen + nlen + 6] ;
memcpy(fn, scdir, scdirlen) ;
fn[scdirlen] = '/' ;
memcpy(fn + scdirlen + 1, names[i], nlen + 1) ;
h = s6_svc_ok(fn) ;
if (h < 0) return -1 ;
if (h) bitarray_set(locked, i) ;
memcpy(fn + scdirlen + 1 + nlen, "/log", 5) ;
if (stat(fn, &st) < 0)
{
if (errno != ENOENT) return -1 ;
}
else
{
int r ;
if (!S_ISDIR(st.st_mode)) return (errno = ENOTDIR, -1) ;
r = s6_svc_ok(fn) ;
if (r < 0) return -1 ;
if (r != h) return (errno = EINVAL, -1) ;
bitarray_set(logged, i) ;
ntotal++ ;
}
}
{
ftrigr_t a = FTRIGR_ZERO ;
unsigned int m = 0 ;
uint16_t ids[ntotal] ;
if (options & 1 && !ftrigr_startf(&a, deadline, stamp)) return -1 ;
for (size_t i = 0 ; i < n ; i++)
{
size_t nlen = strlen(names[i]) ;
char fn[scdirlen + nlen + 6 + sizeof(S6_SUPERVISE_EVENTDIR)] ;
memcpy(fn, scdir, scdirlen) ;
fn[scdirlen] = '/' ;
memcpy(fn + scdirlen + 1, names[i], nlen) ;
if (options & 1 && bitarray_peek(locked, i))
{
ids[m] = registerit(&a, fn, scdirlen + 1 + nlen, deadline, stamp) ;
if (ids[m]) m++ ;
if (bitarray_peek(logged, i))
{
memcpy(fn + scdirlen + 1 + nlen, "/log", 4) ;
ids[m] = registerit(&a, fn, scdirlen + 5 + nlen, deadline, stamp) ;
if (ids[m]) m++ ;
}
}
fn[scdirlen + 1 + nlen] = 0 ;
unlink_void(fn) ;
}
s6_svc_writectl(scdir, S6_SVSCAN_CTLDIR, "an", 2) ;
if (options & 1)
{
ftrigr_wait_and(&a, ids, m, deadline, stamp) ;
ftrigr_end(&a) ;
}
return m ;
}
}
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