1 files changed, 18 insertions, 140 deletions

diff --git a/src/libs6/s6_supervise_link.c b/src/libs6/s6_supervise_link.c
index 1d2ae15..0c6852c 100644
--- a/src/libs6/s6_supervise_link.c
+++ b/src/libs6/s6_supervise_link.c
@@ -1,156 +1,34 @@
 /* ISC license. */
 
-#include <stdint.h>
 #include <string.h>
-#include <unistd.h>
-#include <libgen.h>
-#include <errno.h>
-#include <sys/stat.h>
 
-#include <skalibs/bitarray.h>
-#include <skalibs/tai.h>
 #include <skalibs/stralloc.h>
 #include <skalibs/djbunix.h>
 
-#include <s6/ftrigr.h>
-#include <s6/ftrigw.h>
 #include <s6/s6-supervise.h>
 
-static inline void do_unlink (char const *scdir, char const *prefix, size_t prefixlen, size_t maxlen, char const *names, size_t nameslen, uint32_t killopts)
-{
-  char fn[prefixlen + maxlen + 1] ;
-  memcpy(fn, prefix, prefixlen) ;
-  while (nameslen)
-  {
-    size_t len = strlen(names) + 1 ;
-    memcpy(fn + prefixlen, names, len) ;
-    s6_supervise_unlink(scdir, fn, killopts) ;
-    names += len ; nameslen -= len ;
-  }
-}
-
-static uint16_t registerit (ftrigr_t *a, char *fn, size_t len, gid_t gid, uint32_t options, tain const *deadline, tain *stamp)
-{
-  if (options & 4)
-  {
-    int fd ;
-    memcpy(fn + len, "/down", 6) ;
-    fd = open_trunc(fn) ;
-    if (fd < 0) return 0 ;
-    fd_close(fd) ;
-  }
-  memcpy(fn + len, "/" S6_SUPERVISE_EVENTDIR, 1 + sizeof(S6_SUPERVISE_EVENTDIR)) ;
-  if (!ftrigw_fifodir_make(fn, gid, options & 1)) return 0 ;
-  return ftrigr_subscribe(a, fn, "s", 0, deadline, stamp) ;
-}
-
 int s6_supervise_link (char const *scdir, char const *const *servicedirs, size_t n, char const *prefix, uint32_t options, tain const *deadline, tain *stamp)
 {
-  size_t maxlen = 0 ;
-  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)) ;
-
-  for (size_t i = 0 ; i < n ; i++)
+  int r ;
+  size_t prefixlen = strlen(prefix) ;
+  stralloc sa = STRALLOC_ZERO ;
+  char const *names[n ? n : 1] ;
   {
-    struct stat st ;
-    size_t len = strlen(servicedirs[i]) ;
-    int h ;
-    char subdir[len + 5] ;
-    if (len > maxlen) maxlen = len ;
-    h = s6_svc_ok(servicedirs[i]) ;
-    if (h < 0) return -1 ;
-    if (h) bitarray_set(locked, i) ;
-    memcpy(subdir, servicedirs[i], len) ;
-    memcpy(subdir + len, "/log", 5) ;
-    if (stat(subdir, &st) < 0)
-    {
-      if (errno != ENOENT) return -1 ;
-    }
-    else
+    size_t indices[n ? n : 1] ;
+    for (size_t i = 0 ; i < n ; i++)
     {
-      int r ;
-      if (!S_ISDIR(st.st_mode)) return (errno = ENOTDIR, -1) ;
-      r = s6_svc_ok(subdir) ;
-      if (r < 0) return -1 ;
-      if (r != h) return (errno = EINVAL, -1) ;
-      bitarray_set(logged, i) ;
-      ntotal++ ;
+      indices[i] = sa.len ;
+      if (!stralloc_catb(&sa, prefix, prefixlen)
+       || !sabasename(&sa, servicedirs[i], strlen(servicedirs[i]))
+       || !stralloc_0(&sa)) goto err ;
     }
-  } 
-
-  {
-    stralloc lnames = STRALLOC_ZERO ;
-    ftrigr_t a = FTRIGR_ZERO ;
-    stralloc rpsa = STRALLOC_ZERO ;
-    gid_t gid = options & 2 ? -1 : getegid() ;
-    size_t scdirlen = strlen(scdir) ;
-    size_t prefixlen = strlen(prefix) ;
-    unsigned int m = 0 ;
-    size_t i = 0 ;
-    size_t lstart = 0 ;
-    uint32_t killopts = 0 ;
-    int r ;
-    uint16_t ids[ntotal] ;
-    char lname[scdirlen + prefixlen + maxlen + 2] ;
-    char fn[maxlen + 5 + (sizeof(S6_SUPERVISE_EVENTDIR) > 5 ? sizeof(S6_SUPERVISE_EVENTDIR) : 5)] ;
-    if (!ftrigr_startf(&a, deadline, stamp)) return -1 ;
-    memcpy(lname, scdir, scdirlen) ;
-    lname[scdirlen] = '/' ;
-    memcpy(lname + scdirlen + 1, prefix, prefixlen) ;
-    for (i = 0 ; i < n ; i++)
-    {
-      char *p ;
-      char const *src ;
-      size_t len = strlen(servicedirs[i]) ;
-      int h = bitarray_peek(locked, i) ;
-      memcpy(fn, servicedirs[i], len) ;
-      if (!h)
-      {
-        ids[m] = registerit(&a, fn, len, gid, options, deadline, stamp) ;
-        if (!ids[m++]) goto err ;
-        if (bitarray_peek(logged, i))
-        {
-          memcpy(fn + len, "/log", 4) ;
-          ids[m] = registerit(&a, fn, len + 4, gid, options, deadline, stamp) ;
-          if (!ids[m++]) goto err ;
-        }
-      }
-      fn[len] = 0 ;
-      p = basename(fn) ;
-      len = strlen(p) ;
-      memcpy(lname + scdirlen + 1 + prefixlen, p, len + 1) ;
-      lstart = lnames.len ;
-      if (!h && !stralloc_catb(&lnames, p, len + 1)) goto err ;
-      if (servicedirs[i][0] == '/') src = servicedirs[i] ;
-      else
-      {
-        rpsa.len = 0 ;
-        if (sarealpath(&rpsa, servicedirs[i]) < 0 || !stralloc_0(&rpsa)) goto errl ;
-        src = rpsa.s ;
-      }
-      if (symlink(src, lname) < 0 && (!h || errno != EEXIST)) goto errl ;
-    }
-    stralloc_free(&rpsa) ;
-    r = s6_svc_writectl(scdir, S6_SVSCAN_CTLDIR, "a", 1) ;
-    if (r <= 0) goto errsa ;
-    killopts = 3 ;
-    if (ftrigr_wait_and(&a, ids, m, deadline, stamp) < 0) goto errsa ;
-    ftrigr_end(&a) ;
-    stralloc_free(&lnames) ;
-    return m ;
-
-   errl:
-    lnames.len = lstart ;
-   err:
-    stralloc_free(&rpsa) ;
-   errsa:
-    ftrigr_end(&a) ;
-    do_unlink(scdir, prefix, prefixlen, maxlen, lnames.s, lnames.len, killopts | (options & 4)) ;
-    stralloc_free(&lnames) ;
-    return -1 ;
+    for (size_t i = 0 ; i < n ; i++) names[i] = sa.s + indices[i] ;
   }
+  r = s6_supervise_link_names(scdir, servicedirs, names, n, options, deadline, stamp) ;
+  stralloc_free(&sa) ;
+  return r ;
+
+ err:
+  stralloc_free(&sa) ;
+  return -1 ;
 }