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authorLaurent Bercot <ska-skaware@skarnet.org>2023-09-09 03:58:19 +0000
committerLaurent Bercot <ska@appnovation.com>2023-09-09 03:58:19 +0000
commitab2813a10a7fe6edbbef2acdfd22c0666171f566 (patch)
treeb55c1003c35fccabf91739837e45a095bebcea06 /src/libstddjb
parent4cce87557feb6933c284d234c448bd8bde4facae (diff)
downloadskalibs-ab2813a10a7fe6edbbef2acdfd22c0666171f566.tar.xz
Revamp cspawn, part 2
Signed-off-by: Laurent Bercot <ska@appnovation.com>
Diffstat (limited to 'src/libstddjb')
-rw-r--r--src/libstddjb/cspawn_workaround.c55
1 files changed, 0 insertions, 55 deletions
diff --git a/src/libstddjb/cspawn_workaround.c b/src/libstddjb/cspawn_workaround.c
deleted file mode 100644
index da9bd89..0000000
--- a/src/libstddjb/cspawn_workaround.c
+++ /dev/null
@@ -1,55 +0,0 @@
-/* ISC license. */
-
-#include <skalibs/sysdeps.h>
-#include <skalibs/djbunix.h>
-
-#if defined(SKALIBS_HASPOSIXSPAWN) && defined(SKALIBS_HASPOSIXSPAWNEARLYRETURN)
-
-#include <errno.h>
-#include <signal.h>
-#include <sys/wait.h>
-
-#include <skalibs/allreadwrite.h>
-
- /* when posix_spawn returns too early, you need this */
-
-pid_t cspawn_workaround (pid_t pid, int const *p)
-{
- siginfo_t si ;
- int e ;
- ssize_t r ;
- char c ;
-
- fd_close(p[1]) ;
- r = fd_read(p[0], &c, 1) ;
- fd_close(p[0]) ;
- if (r == -1) return 0 ;
- if (r) return (errno = EILSEQ, 0) ; /* child wrote, wtf */
-
- do e = waitid(P_PID, pid, &si, WEXITED | WNOHANG | WNOWAIT) ;
- while (e == -1 && errno == EINTR) ;
- if (e == -1) return pid ; /* we're in trouble, but don't leak a child */
- if (!si.si_pid) return pid ; /* child is running */
- if (si.si_code != CLD_EXITED || si.si_status != 127) return pid ; /* child died after execve(), let caller handle it */
- /*
- child exited 127, so either execve() failed, which is what we want to catch,
- or it raced like a mofo, execve()d and then exited 127 on its own, in which
- case, tough luck, it never existed.
- */
- wait_pid(pid, 0) ;
- return (errno = 0, 0) ;
-}
-
-#else
-
-pid_t cspawn_workaround (pid_t pid, int const *p)
-{
- if (p)
- {
- fd_close(p[1]) ;
- fd_close(p[0]) ;
- }
- return pid ;
-}
-
-#endif