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Diffstat (limited to 'src/libstddjb/doublefork.c')
-rw-r--r--src/libstddjb/doublefork.c50
1 files changed, 0 insertions, 50 deletions
diff --git a/src/libstddjb/doublefork.c b/src/libstddjb/doublefork.c
deleted file mode 100644
index da512f8..0000000
--- a/src/libstddjb/doublefork.c
+++ /dev/null
@@ -1,50 +0,0 @@
-/* ISC license. */
-
-#include <sys/wait.h>
-#include <unistd.h>
-#include <errno.h>
-#include <skalibs/uint64.h>
-#include <skalibs/allreadwrite.h>
-#include <skalibs/djbunix.h>
-
-pid_t doublefork ()
-{
- char pack[8] ;
- int fd[2] ;
- pid_t child ;
- if (pipe(fd) == -1) return -1 ;
- child = fork() ;
- switch (child)
- {
- case -1:
- {
- fd_close(fd[1]) ;
- fd_close(fd[0]) ;
- return -1 ;
- }
- case 0:
- {
- pid_t pid ;
- fd_close(fd[0]) ;
- pid = fork() ;
- switch (pid)
- {
- case -1: _exit(errno) ;
- case 0: fd_close(fd[1]) ; return 0 ;
- }
- uint64_pack_big(pack, pid) ;
- _exit((allwrite(fd[1], pack, 8) < 8) ? errno : 0) ;
- }
- }
- fd_close(fd[1]) ;
- {
- uint64_t grandchild = 0 ;
- int wstat ;
- if (allread(fd[0], pack, 8) < 8) grandchild = 1 ;
- fd_close(fd[0]) ;
- wait_pid(child, &wstat) ;
- if (grandchild) return (errno = WIFSIGNALED(wstat) ? EINTR : WEXITSTATUS(wstat), -1) ;
- uint64_unpack_big(pack, &grandchild) ;
- return (pid_t)grandchild ;
- }
-}