diff options
Diffstat (limited to 'misc/error.c')
| -rw-r--r-- | misc/error.c | 96 |
1 files changed, 86 insertions, 10 deletions
diff --git a/misc/error.c b/misc/error.c index 63bd309f22..ee0cf86386 100644 --- a/misc/error.c +++ b/misc/error.c @@ -18,24 +18,36 @@ /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */ -#ifdef HAVE_CONFIG_H +#if !_LIBC # include <config.h> #endif +#include "error.h" + #include <stdarg.h> #include <stdio.h> #include <stdlib.h> #include <string.h> +#if !_LIBC && ENABLE_NLS +# include "gettext.h" +# define _(msgid) gettext (msgid) +#endif + #ifdef _LIBC # include <libintl.h> # include <stdbool.h> # include <stdint.h> # include <wchar.h> # define mbsrtowcs __mbsrtowcs +# define USE_UNLOCKED_IO 0 +# define _GL_ATTRIBUTE_FORMAT_PRINTF(a, b) +# define _GL_ARG_NONNULL(a) #endif -#include "error.h" +#if USE_UNLOCKED_IO +# include "unlocked-io.h" +#endif #ifndef _ # define _(String) String @@ -46,7 +58,7 @@ function without parameters instead. */ void (*error_print_progname) (void); -/* This variable is incremented each time `error' is called. */ +/* This variable is incremented each time 'error' is called. */ unsigned int error_message_count; #ifdef _LIBC @@ -57,7 +69,7 @@ unsigned int error_message_count; # include <limits.h> # include <libio/libioP.h> -/* In GNU libc we want do not want to use the common name `error' directly. +/* In GNU libc we want do not want to use the common name 'error' directly. Instead make it a weak alias. */ extern void __error (int status, int errnum, const char *message, ...) __attribute__ ((__format__ (__printf__, 3, 4))); @@ -77,11 +89,29 @@ extern void __error_at_line (int status, int errnum, const char *file_name, #else /* not _LIBC */ -# if !HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P +# include <fcntl.h> +# include <unistd.h> + +# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ +/* Get declarations of the native Windows API functions. */ +# define WIN32_LEAN_AND_MEAN +# include <windows.h> +/* Get _get_osfhandle. */ +# include "msvc-nothrow.h" +# endif + +/* The gnulib override of fcntl is not needed in this file. */ +# undef fcntl + +# if !HAVE_DECL_STRERROR_R # ifndef HAVE_DECL_STRERROR_R "this configure-time declaration test was not run" # endif +# if STRERROR_R_CHAR_P char *strerror_r (); +# else +int strerror_r (); +# endif # endif /* The calling program should define program_name and set it to the @@ -93,6 +123,51 @@ extern char *program_name; # endif /* HAVE_STRERROR_R || defined strerror_r */ #endif /* not _LIBC */ +#if !_LIBC +/* Return non-zero if FD is open. */ +static int +is_open (int fd) +{ +# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ + /* On native Windows: The initial state of unassigned standard file + descriptors is that they are open but point to an INVALID_HANDLE_VALUE. + There is no fcntl, and the gnulib replacement fcntl does not support + F_GETFL. */ + return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE; +# else +# ifndef F_GETFL +# error Please port fcntl to your platform +# endif + return 0 <= fcntl (fd, F_GETFL); +# endif +} +#endif + +static void +flush_stdout (void) +{ +#if !_LIBC + int stdout_fd; + +# if GNULIB_FREOPEN_SAFER + /* Use of gnulib's freopen-safer module normally ensures that + fileno (stdout) == 1 + whenever stdout is open. */ + stdout_fd = STDOUT_FILENO; +# else + /* POSIX states that fileno (stdout) after fclose is unspecified. But in + practice it is not a problem, because stdout is statically allocated and + the fd of a FILE stream is stored as a field in its allocated memory. */ + stdout_fd = fileno (stdout); +# endif + /* POSIX states that fflush (stdout) after fclose is unspecified; it + is safe in glibc, but not on all other platforms. fflush (NULL) + is always defined, but too draconian. */ + if (0 <= stdout_fd && is_open (stdout_fd)) +#endif + fflush (stdout); +} + static void print_errno_message (int errnum) { @@ -100,7 +175,7 @@ print_errno_message (int errnum) #if defined HAVE_STRERROR_R || _LIBC char errbuf[1024]; -# if STRERROR_R_CHAR_P || _LIBC +# if _LIBC || STRERROR_R_CHAR_P s = __strerror_r (errnum, errbuf, sizeof errbuf); # else if (__strerror_r (errnum, errbuf, sizeof errbuf) == 0) @@ -124,7 +199,7 @@ print_errno_message (int errnum) #endif } -static void +static void _GL_ATTRIBUTE_FORMAT_PRINTF (3, 0) _GL_ARG_NONNULL ((3)) error_tail (int status, int errnum, const char *message, va_list args) { #if _LIBC @@ -165,7 +240,7 @@ error_tail (int status, int errnum, const char *message, va_list args) if (res != len) break; - if (__glibc_unlikely (len >= SIZE_MAX / sizeof (wchar_t) / 2)) + if (__builtin_expect (len >= SIZE_MAX / sizeof (wchar_t) / 2, 0)) { /* This really should not happen if everything is fine. */ res = (size_t) -1; @@ -227,7 +302,7 @@ error (int status, int errnum, const char *message, ...) 0); #endif - fflush (stdout); + flush_stdout (); #ifdef _LIBC _IO_flockfile (stderr); #endif @@ -273,6 +348,7 @@ error_at_line (int status, int errnum, const char *file_name, || (old_file_name != NULL && file_name != NULL && strcmp (old_file_name, file_name) == 0))) + /* Simply return and print nothing. */ return; @@ -288,7 +364,7 @@ error_at_line (int status, int errnum, const char *file_name, 0); #endif - fflush (stdout); + flush_stdout (); #ifdef _LIBC _IO_flockfile (stderr); #endif |