From f84afdf304aad18b5c9445acbb5dc8cc1d38748e Mon Sep 17 00:00:00 2001 From: Ayappan Perumal Date: Wed, 19 Nov 2025 13:07:09 +0530 Subject: [PATCH] gh-141659: Fix bad file descriptor error in subprocess on AIX (GH-141660) /proc/self does not exist on AIX. (cherry picked from commit 92c5de73b8d7526326c865b1a669b868f0d40c1e) Co-authored-by: Ayappan Perumal --- .../2025-11-17-08-16-30.gh-issue-141659.QNi9Aj.rst | 1 + Modules/_posixsubprocess.c | 6 ++++++ 2 files changed, 7 insertions(+) create mode 100644 Misc/NEWS.d/next/Core_and_Builtins/2025-11-17-08-16-30.gh-issue-141659.QNi9Aj.rst diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2025-11-17-08-16-30.gh-issue-141659.QNi9Aj.rst b/Misc/NEWS.d/next/Core_and_Builtins/2025-11-17-08-16-30.gh-issue-141659.QNi9Aj.rst new file mode 100644 index 00000000000000..eeb055c6012a12 --- /dev/null +++ b/Misc/NEWS.d/next/Core_and_Builtins/2025-11-17-08-16-30.gh-issue-141659.QNi9Aj.rst @@ -0,0 +1 @@ +Fix bad file descriptor errors from ``_posixsubprocess`` on AIX. diff --git a/Modules/_posixsubprocess.c b/Modules/_posixsubprocess.c index 6ce3494e778df3..e0a95318afe988 100644 --- a/Modules/_posixsubprocess.c +++ b/Modules/_posixsubprocess.c @@ -514,7 +514,13 @@ _close_open_fds_maybe_unsafe(int start_fd, int *fds_to_keep, proc_fd_dir = NULL; else #endif +#if defined(_AIX) + char fd_path[PATH_MAX]; + snprintf(fd_path, sizeof(fd_path), "/proc/%ld/fd", (long)getpid()); + proc_fd_dir = opendir(fd_path); +#else proc_fd_dir = opendir(FD_DIR); +#endif if (!proc_fd_dir) { /* No way to get a list of open fds. */ _close_range_except(start_fd, -1, fds_to_keep, fds_to_keep_len,