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Add new function __libc_message which performs the printing and simple format string handling. The string is written to tty, stderr, syslog in this order, stopping after the first successful output.
This commit is contained in:
Ulrich Drepper
parent
bfd259e0f6
commit
1327439fc6
@ -1,4 +1,4 @@
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/* Copyright (C) 1993, 1994, 1995, 1997, 2000 Free Software Foundation, Inc.
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/* Copyright (C) 1993,1994,1995,1997,2000,2004 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -16,44 +16,129 @@
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <sysdep.h>
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#include <string.h>
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#include <sysdep.h>
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#include <unistd.h>
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#include <sys/syslog.h>
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#include <not-cancel.h>
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#ifdef FATAL_PREPARE_INCLUDE
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#include FATAL_PREPARE_INCLUDE
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#endif
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struct str_list
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{
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const char *str;
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size_t len;
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struct str_list *next;
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};
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/* Abort with an error message. */
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void
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__libc_fatal (message)
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const char *message;
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__libc_message (int do_abort, const char *fmt, ...)
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{
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size_t len = strlen (message);
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va_list ap;
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va_list ap_copy;
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int fd = -1;
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va_start (ap, fmt);
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va_copy (ap_copy, ap);
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#ifdef FATAL_PREPARE
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FATAL_PREPARE;
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#endif
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while (len > 0)
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/* Open a descriptor for /dev/tty unless the user explicitly
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requests errors on standard error. */
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const char *on_2 = __secure_getenv ("LIBC_FATAL_STDERR_");
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if (on_2 == NULL || *on_2 == '\0')
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fd = open_not_cancel_2 (_PATH_TTY, O_RDWR | O_NOCTTY | O_NDELAY);
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if (fd == -1)
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fd = STDERR_FILENO;
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struct str_list *list = NULL;
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int nlist = 0;
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const char *cp = fmt;
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while (*cp != '\0')
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{
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register int count = __write (STDERR_FILENO, message, len);
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if (count > 0)
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/* Find the next "%s" or the end of the string. */
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char *next = cp;
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while (next[0] != '%' || next[1] != 's')
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{
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message += count;
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len -= count;
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next = __strchrnul (next + 1, '%');
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if (next[0] == '\0')
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break;
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}
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else if (count < 0
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#ifdef EINTR
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&& errno != EINTR
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#endif
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)
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break;
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/* Determine what to print. */
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const char *str;
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size_t len;
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if (cp[0] == '%' && cp[1] == 's')
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{
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str = va_arg (ap, const char *);
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len = strlen (str);
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cp += 2;
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}
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else
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{
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str = cp;
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len = next - cp;
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cp = next;
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}
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struct str_list *newp = alloca (sizeof (struct str_list));
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newp->str = str;
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newp->len = len;
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newp->next = list;
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list = newp;
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++nlist;
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}
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abort ();
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bool written = false;
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if (nlist > 0)
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{
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struct iovec *iov = alloca (nlist * sizeof (struct iovec));
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ssize_t total = 0;
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for (int cnt = nlist - 1; cnt >= 0; --cnt)
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{
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iov[cnt].iov_base = list->str;
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iov[cnt].iov_len = list->len;
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total += list->len;
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list = list->next;
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}
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if (TEMP_FAILURE_RETRY (__writev (fd, iov, nlist)) == total)
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written = true;
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}
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va_end (ap);
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/* If we had no success writing the message, use syslog. */
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if (! written)
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vsyslog (LOG_ERR, fmt, ap_copy);
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if (do_abort()
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/* Kill the application. */
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abort ();
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}
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void
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__libc_fatal (message)
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const char *message;
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{
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__libc_message (1, "%s", message);
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}
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libc_hidden_def (__libc_fatal)
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@ -1,4 +1,4 @@
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/* Copyright (C) 1993-1995,1997,2000,2002, 2003 Free Software Foundation, Inc.
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/* Copyright (C) 1993-1995,1997,2000,2002-2004 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -16,45 +16,141 @@
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <sysdep.h>
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#include <string.h>
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#include <abort-instr.h>
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#include <sysdep.h>
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#include <unistd.h>
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#include <sys/syslog.h>
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#ifndef ABORT_INSTRUCTION
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/* No such instruction is available. */
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# define ABORT_INSTRUCTION
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#endif
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/* Abort with an error message. */
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#include <not-cancel.h>
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#ifdef FATAL_PREPARE_INCLUDE
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#include FATAL_PREPARE_INCLUDE
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#endif
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struct str_list
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{
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const char *str;
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size_t len;
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struct str_list *next;
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};
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/* Abort with an error message. */
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void
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__libc_message (int do_abort, const char *fmt, ...)
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{
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va_list ap;
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va_list ap_copy;
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int fd = -1;
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va_start (ap, fmt);
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va_copy (ap_copy, ap);
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#ifdef FATAL_PREPARE
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FATAL_PREPARE;
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#endif
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/* Open a descriptor for /dev/tty unless the user explicitly
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requests errors on standard error. */
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const char *on_2 = __secure_getenv ("LIBC_FATAL_STDERR_");
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if (on_2 == NULL || *on_2 == '\0')
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fd = open_not_cancel_2 (_PATH_TTY, O_RDWR | O_NOCTTY | O_NDELAY);
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if (fd == -1)
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fd = STDERR_FILENO;
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struct str_list *list = NULL;
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int nlist = 0;
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const char *cp = fmt;
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while (*cp != '\0')
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{
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/* Find the next "%s" or the end of the string. */
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const char *next = cp;
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while (next[0] != '%' || next[1] != 's')
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{
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next = __strchrnul (next + 1, '%');
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if (next[0] == '\0')
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break;
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}
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/* Determine what to print. */
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const char *str;
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size_t len;
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if (cp[0] == '%' && cp[1] == 's')
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{
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str = va_arg (ap, const char *);
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len = strlen (str);
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cp += 2;
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}
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else
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{
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str = cp;
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len = next - cp;
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cp = next;
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}
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struct str_list *newp = alloca (sizeof (struct str_list));
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newp->str = str;
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newp->len = len;
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newp->next = list;
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list = newp;
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++nlist;
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}
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bool written = false;
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if (nlist > 0)
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{
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struct iovec *iov = alloca (nlist * sizeof (struct iovec));
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ssize_t total = 0;
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for (int cnt = nlist - 1; cnt >= 0; --cnt)
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{
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iov[cnt].iov_base = (void *) list->str;
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iov[cnt].iov_len = list->len;
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total += list->len;
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list = list->next;
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}
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INTERNAL_SYSCALL_DECL (err);
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ssize_t cnt;
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do
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cnt = INTERNAL_SYSCALL (writev, err, 3, fd, iov, nlist);
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while (INTERNAL_SYSCALL_ERROR_P (cnt, err)
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&& INTERNAL_SYSCALL_ERRNO (cnt, err) == EINTR);
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if (cnt == total)
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written = true;
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}
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va_end (ap);
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/* If we had no success writing the message, use syslog. */
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if (! written)
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vsyslog (LOG_ERR, fmt, ap_copy);
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if (do_abort)
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/* Terminate the process. */
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abort ();
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}
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void
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__libc_fatal (message)
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const char *message;
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{
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size_t len = strlen (message);
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while (len > 0)
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{
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INTERNAL_SYSCALL_DECL (err);
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ssize_t count = INTERNAL_SYSCALL (write, err, 3, STDERR_FILENO,
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message, len);
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if (! INTERNAL_SYSCALL_ERROR_P (count, err))
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{
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message += count;
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len -= count;
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}
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else if (INTERNAL_SYSCALL_ERRNO (count, err) != EINTR)
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break;
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}
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/* Terminate the process. */
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_exit (127);
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/* The previous call should never have returned. */
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while (1)
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/* Try for ever and ever. */
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ABORT_INSTRUCTION;
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__libc_message (1, "%s", message);
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}
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libc_hidden_def (__libc_fatal)
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