diff options
Diffstat (limited to 'gl/error.c')
| -rw-r--r-- | gl/error.c | 152 |
1 files changed, 90 insertions, 62 deletions
@@ -1,5 +1,5 @@ /* Error handler for noninteractive utilities - Copyright (C) 1990-1998, 2000-2007 Free Software Foundation, Inc. + Copyright (C) 1990-1998, 2000-2007, 2009-2010 Free Software Foundation, Inc. This file is part of the GNU C Library. This program is free software: you can redistribute it and/or modify @@ -70,8 +70,8 @@ unsigned int error_message_count; extern void __error (int status, int errnum, const char *message, ...) __attribute__ ((__format__ (__printf__, 3, 4))); extern void __error_at_line (int status, int errnum, const char *file_name, - unsigned int line_number, const char *message, - ...) + unsigned int line_number, const char *message, + ...) __attribute__ ((__format__ (__printf__, 5, 6)));; # define error __error # define error_at_line __error_at_line @@ -85,6 +85,9 @@ extern void __error_at_line (int status, int errnum, const char *file_name, #else /* not _LIBC */ +# include <fcntl.h> +# include <unistd.h> + # if !HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P # ifndef HAVE_DECL_STRERROR_R "this configure-time declaration test was not run" @@ -98,8 +101,33 @@ extern char *program_name; # if HAVE_STRERROR_R || defined strerror_r # define __strerror_r strerror_r -# endif /* HAVE_STRERROR_R || defined strerror_r */ -#endif /* not _LIBC */ +# endif /* HAVE_STRERROR_R || defined strerror_r */ +#endif /* not _LIBC */ + +static inline void +flush_stdout (void) +{ +#if !_LIBC && defined F_GETFL + 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 && 0 <= fcntl (stdout_fd, F_GETFL)) +#endif + fflush (stdout); +} static void print_errno_message (int errnum) @@ -147,58 +175,58 @@ error_tail (int status, int errnum, const char *message, va_list args) bool use_malloc = false; while (1) - { - if (__libc_use_alloca (len * sizeof (wchar_t))) - wmessage = (wchar_t *) alloca (len * sizeof (wchar_t)); - else - { - if (!use_malloc) - wmessage = NULL; - - wchar_t *p = (wchar_t *) realloc (wmessage, - len * sizeof (wchar_t)); - if (p == NULL) - { - free (wmessage); - fputws_unlocked (L"out of memory\n", stderr); - return; - } - wmessage = p; - use_malloc = true; - } - - memset (&st, '\0', sizeof (st)); - tmp = message; - - res = mbsrtowcs (wmessage, &tmp, len, &st); - if (res != len) - break; - - if (__builtin_expect (len >= SIZE_MAX / 2, 0)) - { - /* This really should not happen if everything is fine. */ - res = (size_t) -1; - break; - } - - len *= 2; - } + { + if (__libc_use_alloca (len * sizeof (wchar_t))) + wmessage = (wchar_t *) alloca (len * sizeof (wchar_t)); + else + { + if (!use_malloc) + wmessage = NULL; + + wchar_t *p = (wchar_t *) realloc (wmessage, + len * sizeof (wchar_t)); + if (p == NULL) + { + free (wmessage); + fputws_unlocked (L"out of memory\n", stderr); + return; + } + wmessage = p; + use_malloc = true; + } + + memset (&st, '\0', sizeof (st)); + tmp = message; + + res = mbsrtowcs (wmessage, &tmp, len, &st); + if (res != len) + break; + + if (__builtin_expect (len >= SIZE_MAX / 2, 0)) + { + /* This really should not happen if everything is fine. */ + res = (size_t) -1; + break; + } + + len *= 2; + } if (res == (size_t) -1) - { - /* The string cannot be converted. */ - if (use_malloc) - { - free (wmessage); - use_malloc = false; - } - wmessage = (wchar_t *) L"???"; - } + { + /* The string cannot be converted. */ + if (use_malloc) + { + free (wmessage); + use_malloc = false; + } + wmessage = (wchar_t *) L"???"; + } __vfwprintf (stderr, wmessage, args); if (use_malloc) - free (wmessage); + free (wmessage); } else #endif @@ -233,10 +261,10 @@ error (int status, int errnum, const char *message, ...) cancellation. Therefore disable cancellation for now. */ int state = PTHREAD_CANCEL_ENABLE; __libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state), - 0); + 0); #endif - fflush (stdout); + flush_stdout (); #ifdef _LIBC _IO_flockfile (stderr); #endif @@ -268,7 +296,7 @@ int error_one_per_line; void error_at_line (int status, int errnum, const char *file_name, - unsigned int line_number, const char *message, ...) + unsigned int line_number, const char *message, ...) { va_list args; @@ -278,10 +306,10 @@ error_at_line (int status, int errnum, const char *file_name, static unsigned int old_line_number; if (old_line_number == line_number - && (file_name == old_file_name - || strcmp (old_file_name, file_name) == 0)) - /* Simply return and print nothing. */ - return; + && (file_name == old_file_name + || strcmp (old_file_name, file_name) == 0)) + /* Simply return and print nothing. */ + return; old_file_name = file_name; old_line_number = line_number; @@ -292,10 +320,10 @@ error_at_line (int status, int errnum, const char *file_name, cancellation. Therefore disable cancellation for now. */ int state = PTHREAD_CANCEL_ENABLE; __libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state), - 0); + 0); #endif - fflush (stdout); + flush_stdout (); #ifdef _LIBC _IO_flockfile (stderr); #endif @@ -312,10 +340,10 @@ error_at_line (int status, int errnum, const char *file_name, #if _LIBC __fxprintf (NULL, file_name != NULL ? "%s:%d: " : " ", - file_name, line_number); + file_name, line_number); #else fprintf (stderr, file_name != NULL ? "%s:%d: " : " ", - file_name, line_number); + file_name, line_number); #endif va_start (args, message); |