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/* ISC license. */
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h> /* for rename() */
#include <errno.h>
#include <skalibs/bytestr.h>
#include <skalibs/tai.h>
#include <skalibs/stralloc.h>
#include <skalibs/djbunix.h>
#include <skalibs/surf.h>
#include <skalibs/random.h>
#include "ftrig1.h"
static SURFSchedule surf_ctx = SURFSCHEDULE_ZERO ;
void ftrig1_init (void)
{
char seed[160] ;
random_makeseed(seed) ;
surf_init(&surf_ctx, seed) ;
}
static inline void surfname (char *s, size_t n)
{
static char const oklist[64] = "ABCDEFGHIJKLMNOPQRSTUVWXYZghijklmnopqrstuvwxyz-_0123456789abcdef" ;
surf(&surf_ctx, s, n) ;
while (n--) s[n] = oklist[s[n] & 63] ;
}
int ftrig1_make (ftrig1_t *f, char const *path)
{
ftrig1_t ff = FTRIG1_ZERO ;
size_t pathlen = str_len(path) ;
int e = 0 ;
char tmp[pathlen + 46 + FTRIG1_PREFIXLEN] ;
byte_copy(tmp, pathlen, path) ;
tmp[pathlen] = '/' ; tmp[pathlen+1] = '.' ;
byte_copy(tmp + pathlen + 2, FTRIG1_PREFIXLEN, FTRIG1_PREFIX) ;
tmp[pathlen + 2 + FTRIG1_PREFIXLEN] = ':' ;
if (!timestamp(tmp + pathlen + 3 + FTRIG1_PREFIXLEN)) return 0 ;
tmp[pathlen + 28 + FTRIG1_PREFIXLEN] = ':' ;
surfname(tmp + pathlen + 29 + FTRIG1_PREFIXLEN, 16) ;
tmp[pathlen + 45 + FTRIG1_PREFIXLEN] = 0 ;
{
mode_t m = umask(0) ;
if (mkfifo(tmp, S_IRUSR|S_IWUSR|S_IWGRP|S_IWOTH) == -1)
{
umask(m) ;
return 0 ;
}
umask(m) ;
}
if (!stralloc_catb(&ff.name, tmp, pathlen+1)) { e = errno ; goto err0 ; }
if (!stralloc_catb(&ff.name, tmp + pathlen + 2, FTRIG1_PREFIXLEN + 44))
{
e = errno ; goto err1 ;
}
ff.fd = open_read(tmp) ;
if (ff.fd == -1) { e = errno ; goto err1 ; }
ff.fdw = open_write(tmp) ;
if (ff.fdw == -1) { e = errno ; goto err2 ; }
if (rename(tmp, ff.name.s) == -1) goto err3 ;
*f = ff ;
return 1 ;
err3:
e = errno ;
fd_close(ff.fdw) ;
err2:
fd_close(ff.fd) ;
err1:
stralloc_free(&ff.name) ;
err0:
unlink(tmp) ;
errno = e ;
return 0 ;
}
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