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/* ISC license. */
#include <sys/types.h>
#include <stdint.h>
#include <errno.h>
#include <skalibs/uint32.h>
#include <skalibs/bytestr.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/buffer.h>
#include <skalibs/env.h>
#include <skalibs/djbunix.h>
#include <skalibs/unix-transactional.h>
#include <s6-rc/s6rc-db.h>
#ifdef DEBUG
#include <skalibs/lolstdio.h>
#define DBG(...) do { bprintf(buffer_2, "debug: ") ; bprintf(buffer_2, __VA_ARGS__) ; bprintf(buffer_2, "\n") ; buffer_flush(buffer_2) ; } while(0)
#else
#define DBG(...)
#endif
static int s6rc_db_check_valid_string (char const *string, size_t stringlen, size_t pos)
{
if (pos >= stringlen) return 0 ;
if (str_nlen(string + pos, stringlen - pos) == stringlen - pos) return 0 ;
return 1 ;
}
static inline int s6rc_db_check_valid_strings (char const *string, size_t stringlen, size_t pos, unsigned int n)
{
while (n--)
{
if (!s6rc_db_check_valid_string(string, stringlen, pos)) return 0 ;
pos += str_len(string + pos) + 1 ;
}
return 1 ;
}
static inline int s6rc_db_read_deps (buffer *b, unsigned int max, uint32_t *deps, unsigned int ndeps)
{
uint32_t x ;
ndeps <<= 1 ;
while (ndeps--)
{
if (!s6rc_db_read_uint32(b, &x)) return -1 ;
if (x >= max) return 0 ;
*deps++ = x ;
}
return 1 ;
}
static inline int s6rc_db_read_services (buffer *b, s6rc_db_t *db)
{
unsigned int n = db->nshort + db->nlong ;
unsigned int nargvs = db->nargvs ;
unsigned int argvpos = 0 ;
register unsigned int i = 0 ;
for (; i < n ; i++)
{
s6rc_service_t *sv = db->services + i ;
DBG("service %u/%u", i, n) ;
if (!s6rc_db_read_uint32(b, &sv->name)) return -1 ;
DBG(" name is %u: %s", sv->name, db->string + sv->name) ;
if (sv->name >= db->stringlen) return 0 ;
if (!s6rc_db_check_valid_string(db->string, db->stringlen, sv->name)) return 0 ;
if (!s6rc_db_read_uint32(b, &sv->flags)) return -1 ;
DBG(" flags is %x", sv->flags) ;
if (!s6rc_db_read_uint32(b, &sv->timeout[0])) return -1 ;
DBG(" timeout0 is %u", sv->timeout[0]) ;
if (!s6rc_db_read_uint32(b, &sv->timeout[1])) return -1 ;
DBG(" timeout1 is %u", sv->timeout[1]) ;
if (!s6rc_db_read_uint32(b, &sv->ndeps[0])) return -1 ;
DBG(" ndeps0 is %u", sv->ndeps[0]) ;
if (!s6rc_db_read_uint32(b, &sv->ndeps[1])) return -1 ;
DBG(" ndeps1 is %u", sv->ndeps[1]) ;
if (!s6rc_db_read_uint32(b, &sv->deps[0])) return -1 ;
DBG(" deps0 is %u", sv->deps[0]) ;
if (sv->deps[0] > db->ndeps || sv->deps[0] + sv->ndeps[0] > db->ndeps)
return 0 ;
if (!s6rc_db_read_uint32(b, &sv->deps[1])) return -1 ;
DBG(" deps1 is %u", sv->deps[1]) ;
if (sv->deps[1] > db->ndeps || sv->deps[1] + sv->ndeps[1] > db->ndeps)
return 0 ;
#ifdef DEBUG
{
unsigned int k = 0 ;
for (; k < sv->ndeps[0] ; k++)
DBG(" rev dep on %u", db->deps[sv->deps[0] + k]) ;
for (k = 0 ; k < sv->ndeps[1] ; k++)
DBG(" dep on %u", db->deps[db->ndeps + sv->deps[1] + k]) ;
}
#endif
if (i < db->nlong)
{
if (!s6rc_db_read_uint32(b, &sv->x.longrun.pipeline[0])) return -1 ;
if (!s6rc_db_read_uint32(b, &sv->x.longrun.pipeline[1])) return -1 ;
}
else
{
unsigned int j = 0 ;
DBG(" oneshot") ;
for (; j < 2 ; j++)
{
uint32_t pos, argc ;
if (!s6rc_db_read_uint32(b, &argc)) return -1 ;
DBG(" argc[%u] is %u, nargvs is %u", j, argc, nargvs) ;
if (argc > nargvs) return 0 ;
if (!s6rc_db_read_uint32(b, &pos)) return -1 ;
DBG(" pos[%u] is %u", j, pos) ;
if (!s6rc_db_check_valid_strings(db->string, db->stringlen, pos, argc)) return 0 ;
if (!env_make((char const **)db->argvs + argvpos, argc, db->string + pos, db->stringlen - pos)) return -1 ;
DBG(" first arg is %s", db->argvs[argvpos]) ;
sv->x.oneshot.argv[j] = argvpos ;
sv->x.oneshot.argc[j] = argc ;
argvpos += argc ; nargvs -= argc ;
if (!nargvs--) return 0 ;
db->argvs[argvpos++] = 0 ;
}
}
{
char c ;
if (buffer_get(b, &c, 1) < 1) return -1 ;
if (c != '\376') return 0 ;
}
}
if (nargvs) return 0 ;
return 1 ;
}
static inline int s6rc_db_read_string (buffer *b, char *string, size_t len)
{
if (buffer_get(b, string, len) < (ssize_t)len) return -1 ;
return 1 ;
}
static inline int s6rc_db_read_buffer (buffer *b, s6rc_db_t *db)
{
{
char banner[S6RC_DB_BANNER_START_LEN] ;
if (buffer_get(b, banner, S6RC_DB_BANNER_START_LEN) < S6RC_DB_BANNER_START_LEN) return -1 ;
if (byte_diff(banner, S6RC_DB_BANNER_START_LEN, S6RC_DB_BANNER_START)) return 0 ;
}
{
register int r = s6rc_db_read_string(b, db->string, db->stringlen) ;
if (r < 1) return r ;
r = s6rc_db_read_deps(b, db->nshort + db->nlong, db->deps, db->ndeps) ;
if (r < 1) return r ;
r = s6rc_db_read_services(b, db) ;
if (r < 1) return r ;
}
{
char banner[S6RC_DB_BANNER_END_LEN] ;
if (buffer_get(b, banner, S6RC_DB_BANNER_END_LEN) < S6RC_DB_BANNER_END_LEN) return -1 ;
if (byte_diff(banner, S6RC_DB_BANNER_END_LEN, S6RC_DB_BANNER_END)) return 0 ;
}
return 1 ;
}
int s6rc_db_read (int fdcompiled, s6rc_db_t *db)
{
int r, e ;
buffer b ;
char buf[BUFFER_INSIZE] ;
int fd = open_readatb(fdcompiled, "db") ;
if (fd < 0) return -1 ;
buffer_init(&b, &fd_readsv, fd, buf, BUFFER_INSIZE) ;
r = s6rc_db_read_buffer(&b, db) ;
e = errno ;
fd_close(fd) ;
errno = e ;
return r ;
}
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