add 'e' modifier (close-on-exec) to fopen and fdopen

[musl] / src / stdio / __fdopen.c

diff --git a/src/stdio/__fdopen.c b/src/stdio/__fdopen.c
index 8bd51c6..df6ed71 100644 (file)
--- a/src/stdio/__fdopen.c
+++ b/src/stdio/__fdopen.c
@@ -4,7 +4,6 @@ FILE *__fdopen(int fd, const char *mode)
 {
        FILE *f;
        struct termios tio;
-       int plus = !!strchr(mode, '+');
 
        /* Check for valid initial mode character */
        if (!strchr("rwa", *mode)) {
@@ -19,7 +18,10 @@ FILE *__fdopen(int fd, const char *mode)
        memset(f, 0, sizeof *f);
 
        /* Impose mode restrictions */
-       if (!plus) f->flags = (*mode == 'r') ? F_NOWR : F_NORD;
+       if (!strchr(mode, '+')) f->flags = (*mode == 'r') ? F_NOWR : F_NORD;
+
+       /* Apply close-on-exec flag */
+       if (strchr(mode, 'e')) __syscall(SYS_fcntl, fd, F_SETFD, FD_CLOEXEC);
 
        /* Set append mode on fd if opened for append */
        if (*mode == 'a') {