From 95cfe58e3db9d939abe7a9a26116c1d576eed60b Mon Sep 17 00:00:00 2001 From: wm4 Date: Sat, 30 Nov 2013 22:40:51 +0100 Subject: Use O_CLOEXEC when creating FDs This is needed so that new processes (created with fork+exec) don't inherit open files, which can be important for a number of reasons. Since O_CLOEXEC is relatively new (POSIX.1-2008, before that Linux specific), we #define it to 0 in io.h to prevent compilation errors on older/crappy systems. At least this is the plan. input.c creates a pipe. For that, add a mp_set_cloexec() function (which is based on Weston's code in vo_wayland.c, but more correct). We could use pipe2() instead, but that is Linux specific. Technically, we have a race condition, but it won't matter. --- mpvcore/player/command.c | 4 +++- mpvcore/player/configfiles.c | 9 ++++----- 2 files changed, 7 insertions(+), 6 deletions(-) (limited to 'mpvcore/player') diff --git a/mpvcore/player/command.c b/mpvcore/player/command.c index d8a317413f..129c0aa58a 100644 --- a/mpvcore/player/command.c +++ b/mpvcore/player/command.c @@ -65,6 +65,8 @@ #include #endif +#include "osdep/io.h" + #include "mp_core.h" #include "mp_lua.h" @@ -2334,7 +2336,7 @@ static int overlay_add(struct MPContext *mpctx, int id, int x, int y, fd = -1; close_fd = false; } else { - fd = open(file, O_RDONLY | O_BINARY); + fd = open(file, O_RDONLY | O_BINARY | O_CLOEXEC); } void *p = mmap(NULL, h * stride, PROT_READ, MAP_SHARED, fd, offset); if (fd >= 0 && close_fd) diff --git a/mpvcore/player/configfiles.c b/mpvcore/player/configfiles.c index 29350c0aed..31e3d0e75d 100644 --- a/mpvcore/player/configfiles.c +++ b/mpvcore/player/configfiles.c @@ -51,7 +51,6 @@ bool mp_parse_cfgfiles(struct MPContext *mpctx) struct MPOpts *opts = mpctx->opts; m_config_t *conf = mpctx->mconfig; char *conffile; - int conffile_fd; if (!opts->load_config) return true; if (!m_config_parse_config_file(conf, MPLAYER_CONFDIR "/mpv.conf", 0) < 0) @@ -60,11 +59,11 @@ bool mp_parse_cfgfiles(struct MPContext *mpctx) if ((conffile = mp_find_user_config_file("config")) == NULL) MP_ERR(mpctx, "mp_find_user_config_file(\"config\") problem\n"); else { - if ((conffile_fd = open(conffile, O_CREAT | O_EXCL | O_WRONLY, - 0666)) != -1) { + int fd = open(conffile, O_CREAT | O_EXCL | O_WRONLY | O_CLOEXEC, 0666); + if (fd != -1) { MP_INFO(mpctx, "Creating config file: %s\n", conffile); - write(conffile_fd, DEF_CONFIG, sizeof(DEF_CONFIG) - 1); - close(conffile_fd); + write(fd, DEF_CONFIG, sizeof(DEF_CONFIG) - 1); + close(fd); } if (m_config_parse_config_file(conf, conffile, 0) < 0) return false; -- cgit v1.2.3