diff options
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/k5-platform.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/include/k5-platform.h b/src/include/k5-platform.h index 141ea94f7..a143ab52a 100644 --- a/src/include/k5-platform.h +++ b/src/include/k5-platform.h @@ -47,6 +47,8 @@ #include <limits.h> #include <stdlib.h> #include <stdio.h> +#include <fcntl.h> +#include <errno.h> #ifdef _WIN32 #define CAN_COPY_VA_LIST @@ -752,6 +754,52 @@ load_64_n (const unsigned char *p) (*(OUT) = getpwuid(UID), *(OUT) == NULL ? -1 : 0) #endif +/* Ensure, if possible, that the indicated file descriptor won't be + kept open if we exec another process (e.g., launching a ccapi + server). If we don't know how to do it... well, just go about our + business. Probably most callers won't check the return status + anyways. */ + +#if 0 +static inline int +set_cloexec_fd(int fd) +{ +#if defined(F_SETFD) +# ifdef FD_CLOEXEC + if (fcntl(fd, F_SETFD, FD_CLOEXEC) != 0) + return errno; +# else + if (fcntl(fd, F_SETFD, 1) != 0) + return errno; +# endif +#endif + return 0; +} + +static inline int +set_cloexec_file(FILE *f) +{ + return set_cloexec_fd(fileno(f)); +} +#else +/* Macros make the Sun compiler happier, and all variants of this do a + single evaluation of the argument, and fcntl and fileno should + produce reasonable error messages on type mismatches, on any system + with F_SETFD. */ +#ifdef F_SETFD +# ifdef FD_CLOEXEC +# define set_cloexec_fd(FD) (fcntl((FD), F_SETFD, FD_CLOEXEC) ? errno : 0) +# else +# define set_cloexec_fd(FD) (fcntl((FD), F_SETFD, 1) ? errno : 0) +# endif +#else +# define set_cloexec_fd(FD) ((FD),0) +#endif +#define set_cloexec_file(F) set_cloexec_fd(fileno(F)) +#endif + + + /* Since the original ANSI C spec left it undefined whether or how you could copy around a va_list, C 99 added va_copy. For old implementations, let's do our best to fake it. @@ -892,4 +940,6 @@ extern int krb5int_mkstemp(char *); #define mkstemp krb5int_mkstemp #endif + + #endif /* K5_PLATFORM_H */ |