Set close-on-exec when opening files

Relies on platforms with O_CLOEXEC support following POSIX requirement
to not copy the close-on-exec flag to the new fd in dup2(), but to leave
it unset instead, since that's how fd's are passed to child processes
to handled compressed files.

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/XpmI.h b/src/XpmI.h
index 70da79e..4ab48f2 100644
--- a/src/XpmI.h
+++ b/src/XpmI.h
@@ -103,6 +103,13 @@ extern FILE *popen();
 # endif
 #endif
 
+#ifdef O_CLOEXEC
+# define FOPEN_CLOEXEC "e"
+#else
+# define FOPEN_CLOEXEC ""
+# define O_CLOEXEC 0
+#endif
+
 #define XPMMAXCMTLEN BUFSIZ
 typedef struct {
     unsigned int type;