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/* ISC license. */
#include <sys/stat.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <skalibs/djbunix.h>
#include <s6-rc/s6rc-utils.h>
#include "s6rc-servicedir-internal.h"
#include <s6-rc/s6rc-servicedir.h>
int s6rc_servicedir_copy_online (char const *src, char const *dst)
{
size_t srclen = strlen(src) ;
size_t dstlen = strlen(dst) ;
unsigned int n ;
unsigned int i = 0 ;
int wantup = 0 ;
int e ;
char srcfn[srclen + s6rc_servicedir_file_maxlen + 6] ;
char dstfn[dstlen + s6rc_servicedir_file_maxlen + 6] ;
char oldfn[dstlen + s6rc_servicedir_file_maxlen + 6] ;
memcpy(srcfn, src, srclen) ;
srcfn[srclen] = '/' ;
memcpy(dstfn, dst, dstlen + 1) ;
memcpy(oldfn, dst, dstlen) ;
memcpy(oldfn + dstlen, "/old", 5) ;
if (rm_rf(oldfn) < 0 && errno != ENOENT) return 0 ;
{
mode_t m = umask(0) ;
int r = mkdir(oldfn, 0755) ;
umask(m) ;
if (r < 0) return 0 ;
}
dstfn[dstlen] = '/' ;
oldfn[dstlen + 4] = '/' ;
wantup = s6rc_servicedir_block(dst) ;
if (wantup < 0) { e = errno ; goto errdir ; }
for (; s6rc_servicedir_file_list[i].name ; i++)
{
strcpy(dstfn + dstlen + 1, s6rc_servicedir_file_list[i].name) ;
strcpy(oldfn + dstlen + 5, s6rc_servicedir_file_list[i].name) ;
if (rename(dstfn, oldfn) < 0
&& (errno != ENOENT || s6rc_servicedir_file_list[i].options & SVFILE_MANDATORY))
{
e = errno ;
goto errrename ;
}
}
n = i ;
while (i--)
{
if (!s6rc_servicedir_copy_one(src, dst, s6rc_servicedir_file_list + i))
{
e = errno ;
goto errremove ;
}
}
oldfn[dstlen + 4] = 0 ;
rm_rf(oldfn) ;
s6rc_servicedir_unblock(dst, wantup) ;
return 1 ;
errremove:
for (; i < n ; i++)
{
strcpy(dstfn + dstlen + 1, s6rc_servicedir_file_list[i].name) ;
rm_rf(dstfn) ;
}
i = n ;
errrename:
while (i--)
{
strcpy(dstfn + dstlen + 1, s6rc_servicedir_file_list[i].name) ;
strcpy(oldfn + dstlen + 5, s6rc_servicedir_file_list[i].name) ;
rename(oldfn, dstfn) ;
}
errdir:
oldfn[dstlen + 4] = 0 ;
rmdir(oldfn) ;
errno = e ;
return 0 ;
}
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