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/* ISC license. */
#include <string.h>
#include <stdint.h>
#include <skalibs/buffer.h>
#include <skalibs/env.h>
#include <skalibs/djbunix.h>
#include <skalibs/unix-transactional.h>
#include <skalibs/posixishard.h>
#include <s6-rc/s6rc-db.h>
static int s6rc_db_check_valid_string (char const *string, size_t stringlen, size_t pos)
{
if (pos >= stringlen) return 0 ;
if (strnlen(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 += strlen(string + pos) + 1 ;
}
return 1 ;
}
static inline int s6rc_db_read_uints (buffer *b, unsigned int max, uint32_t *p, unsigned int n)
{
uint32_t x ;
while (n--)
{
if (!s6rc_db_read_uint32(b, &x)) return -1 ;
if (x >= max) return 0 ;
*p++ = 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 ;
unsigned int i = 0 ;
for (; i < n ; i++)
{
s6rc_service_t *sv = db->services + i ;
if (!s6rc_db_read_uint32(b, &sv->name)) return -1 ;
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 ;
if (!s6rc_db_read_uint32(b, &sv->timeout[0])) return -1 ;
if (!s6rc_db_read_uint32(b, &sv->timeout[1])) return -1 ;
if (!s6rc_db_read_uint32(b, &sv->ndeps[0])) return -1 ;
if (!s6rc_db_read_uint32(b, &sv->ndeps[1])) return -1 ;
if (!s6rc_db_read_uint32(b, &sv->deps[0])) return -1 ;
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 ;
if (sv->deps[1] > db->ndeps || sv->deps[1] + sv->ndeps[1] > db->ndeps)
return 0 ;
if (i < db->nlong)
{
if (!s6rc_db_read_uint32(b, &sv->x.longrun.consumer)) return -1 ;
if (!s6rc_db_read_uint32(b, &sv->x.longrun.nproducers)) return -1 ;
if (!s6rc_db_read_uint32(b, &sv->x.longrun.producers)) return -1 ;
}
else
{
unsigned int j = 0 ;
for (; j < 2 ; j++)
{
uint32_t pos, argc ;
if (!s6rc_db_read_uint32(b, &argc)) return -1 ;
if (argc > nargvs) return 0 ;
if (!s6rc_db_read_uint32(b, &pos)) return -1 ;
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 ;
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 (memcmp(banner, S6RC_DB_BANNER_START, S6RC_DB_BANNER_START_LEN)) return 0 ;
}
{
int r = s6rc_db_read_string(b, db->string, db->stringlen) ;
if (r < 1) return r ;
r = s6rc_db_read_uints(b, db->nshort + db->nlong, db->deps, db->ndeps << 1) ;
if (r < 1) return r ;
r = s6rc_db_read_uints(b, db->nlong, db->producers, db->nproducers) ;
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 (memcmp(banner, S6RC_DB_BANNER_END, S6RC_DB_BANNER_END_LEN)) return 0 ;
}
return 1 ;
}
int s6rc_db_read (int fdcompiled, s6rc_db_t *db)
{
int r ;
buffer b ;
char buf[BUFFER_INSIZE] ;
int fd = open_readatb(fdcompiled, "db") ;
if (fd < 0) return -1 ;
buffer_init(&b, &buffer_read, fd, buf, BUFFER_INSIZE) ;
r = s6rc_db_read_buffer(&b, db) ;
fd_close(fd) ;
return r ;
}
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