assert-perr.c 1.8 KB

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  1. /* Copyright (C) 1994-2026 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, see
  13. <https://www.gnu.org/licenses/>. */
  14. #include <_itoa.h>
  15. #include <array_length.h>
  16. #include <assert.h>
  17. #include <intprops.h>
  18. #include <libintl.h>
  19. #include <string.h>
  20. #include <stdio.h>
  21. extern const char *__progname;
  22. /* This function, when passed an error number, a filename, and a line
  23. number, prints a message on the standard error stream of the form:
  24. a.c:10: foobar: Unexpected error: Computer bought the farm
  25. It then aborts program execution via a call to `abort'. */
  26. void
  27. __assert_perror_fail (int errnum,
  28. const char *file, unsigned int line,
  29. const char *function)
  30. {
  31. char errbuf[1024];
  32. const char *e = __strerror_r (errnum, errbuf, sizeof errbuf);
  33. char linebuf[INT_BUFSIZE_BOUND (unsigned int)];
  34. array_end (linebuf)[-1] = '\0';
  35. char *linestr = _itoa_word (line, array_end (linebuf) - 1, 10, 0);
  36. __libc_message (_("%s%s%s:%s: %s%sUnexpected error: %s.\n"),
  37. __progname,
  38. __progname[0] ? ": " : "",
  39. file,
  40. linestr,
  41. function ? function : "",
  42. function ? ": " : "",
  43. e);
  44. }
  45. libc_hidden_def (__assert_perror_fail)