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authorLaurent Bercot <ska-skaware@skarnet.org>2023-02-12 01:36:13 +0000
committerLaurent Bercot <ska@appnovation.com>2023-02-12 01:36:13 +0000
commit4d41f0d5e871b86b8f56339a99cfb1b80fbb420c (patch)
tree0446c51aeb07d8ef817fe3cdc53955dc7fe3a09d /src/libps/s6ps_otree.c
parent2f8984613e17f9e5971ec338240b0bb6d2dd1cc6 (diff)
downloads6-linux-utils-4d41f0d5e871b86b8f56339a99cfb1b80fbb420c.tar.xz
Deglobalize s6-ps
Signed-off-by: Laurent Bercot <ska@appnovation.com>
Diffstat (limited to 'src/libps/s6ps_otree.c')
-rw-r--r--src/libps/s6ps_otree.c100
1 files changed, 0 insertions, 100 deletions
diff --git a/src/libps/s6ps_otree.c b/src/libps/s6ps_otree.c
deleted file mode 100644
index 6ba8589..0000000
--- a/src/libps/s6ps_otree.c
+++ /dev/null
@@ -1,100 +0,0 @@
-/* ISC license. */
-
-#include <errno.h>
-
-#include <skalibs/avltreen.h>
-
-#include "s6-ps.h"
-
-typedef struct ptreeiter_s ptreeiter_t, *ptreeiter_t_ref ;
-struct ptreeiter_s
-{
- unsigned int *childlist ;
- unsigned int const *childindex ;
- unsigned int const *ppindex ;
- unsigned int *cpos ;
-} ;
-
-typedef struct pstuff_s pstuff_t, *pstuff_t_ref ;
-struct pstuff_s
-{
- unsigned int *orderedlist ;
- pscan_t *p ;
- unsigned int const *childlist ;
- unsigned int const *childindex ;
- unsigned int const *nchild ;
-} ;
-
-static int fillchildlist (unsigned int i, unsigned int h, void *x)
-{
- ptreeiter_t *pt = x ;
- unsigned int j = pt->ppindex[i] ;
- pt->childlist[pt->childindex[j] + pt->cpos[j]++] = i ;
- (void)h ;
- return 1 ;
-}
-
-static void fillo_tree_rec (pstuff_t *blah, unsigned int root, signed int h)
-{
- static unsigned int j = 0 ;
- unsigned int i = !blah->p[root].pid ;
- if (blah->p[root].pid == 1) h = -1 ;
- blah->p[root].height = (h > 0) ? h : 0 ;
- blah->orderedlist[j++] = root ;
- for (; i < blah->nchild[root] ; i++)
- fillo_tree_rec(blah, blah->childlist[blah->childindex[root] + i], h+1) ;
-}
-
- /*
- Fills up orderedlist with the right indices to print a process tree.
- O(n log n) time, O(n) space, all in the stack.
- */
-
-void s6ps_otree (pscan_t *p, unsigned int n, avltreen *pidtree, unsigned int *orderedlist)
-{
- unsigned int childlist[n] ;
- unsigned int childindex[n] ;
- unsigned int nchild[n] ;
- unsigned int i = 0 ;
- for (; i < n ; i++) nchild[i] = 0 ;
-
- /* Compute the ppid tree */
- for (i = 0 ; i < n ; i++)
- {
- uint32_t k ;
- if (!avltreen_search(pidtree, &p[i].ppid, &k)) k = n-1 ;
- orderedlist[i] = k ; /* using orderedlist as ppindex */
- nchild[k]++ ;
- }
- {
- unsigned int j = 0 ;
- for (i = 0 ; i < n ; i++)
- {
- childindex[i] = j ;
- j += nchild[i] ;
- }
- }
-
- /* Fill the childlist by increasing pids so it is sorted */
- {
- unsigned int cpos[n] ;
- ptreeiter_t blah = { .childlist = childlist, .childindex = childindex, .ppindex = orderedlist, .cpos = cpos } ;
- for (i = 0 ; i < n ; i++) cpos[i] = 0 ;
- avltreen_iter_nocancel(pidtree, avltreen_totalsize(pidtree), &fillchildlist, &blah) ;
- }
-
- /* If we have init, make it the last in the orphan list */
- if (n > 1 && p[childlist[childindex[n-1]+1]].pid == 1)
- {
- unsigned int pos1 = childlist[childindex[n-1] + 1] ;
- for (i = 2 ; i < nchild[n-1] ; i++)
- childlist[childindex[n-1]+i-1] = childlist[childindex[n-1]+i] ;
- childlist[childindex[n-1]+nchild[n-1]-1] = pos1 ;
- }
-
- /* Finally, fill orderedlist by walking the childindex tree. */
- {
- pstuff_t blah = { .orderedlist = orderedlist, .p = p, .childlist = childlist, .childindex = childindex, .nchild = nchild } ;
- fillo_tree_rec(&blah, n-1, -1) ;
- }
-}