sigaction.c 3.4 KB

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  1. /* Copyright (C) 1997, 1998, 1999, 2000 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 Library General Public License as
  5. published by the Free Software Foundation; either version 2 of the
  6. 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. Library General Public License for more details.
  11. You should have received a copy of the GNU Library General Public
  12. License along with the GNU C Library; see the file COPYING.LIB. If not,
  13. write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  14. Boston, MA 02111-1307, USA.
  15. Totally hacked up for uClibc by Erik Andersen <andersen@codepoet.org>
  16. */
  17. #include <errno.h>
  18. #include <signal.h>
  19. #include <string.h>
  20. #include <sys/syscall.h>
  21. #include <bits/kernel_sigaction.h>
  22. #define SA_RESTORER 0x04000000
  23. extern __typeof(sigaction) __libc_sigaction;
  24. #ifdef __NR_rt_sigaction
  25. libc_hidden_proto(memcpy)
  26. /* If ACT is not NULL, change the action for SIG to *ACT.
  27. If OACT is not NULL, put the old action for SIG in *OACT. */
  28. int __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
  29. {
  30. int result;
  31. struct kernel_sigaction kact, koact;
  32. if (act) {
  33. kact.k_sa_handler = act->sa_handler;
  34. memcpy (&kact.sa_mask, &act->sa_mask, sizeof (kact.sa_mask));
  35. kact.sa_flags = act->sa_flags;
  36. # ifdef HAVE_SA_RESTORER
  37. # if _MIPS_SIM == _ABIO32
  38. kact.sa_restorer = act->sa_restorer;
  39. # else
  40. kact.sa_restorer = &restore_rt;
  41. # endif
  42. # endif
  43. }
  44. /* XXX The size argument hopefully will have to be changed to the
  45. real size of the user-level sigset_t. */
  46. result = __syscall_rt_sigaction(sig, act ? __ptrvalue (&kact) : NULL,
  47. oact ? __ptrvalue (&koact) : NULL, _NSIG / 8);
  48. if (oact && result >= 0) {
  49. oact->sa_handler = koact.k_sa_handler;
  50. memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (oact->sa_mask));
  51. oact->sa_flags = koact.sa_flags;
  52. # ifdef HAVE_SA_RESTORER
  53. oact->sa_restorer = koact.sa_restorer;
  54. # endif
  55. }
  56. return result;
  57. }
  58. #else
  59. extern void restore (void) asm ("__restore") attribute_hidden;
  60. /* If ACT is not NULL, change the action for SIG to *ACT.
  61. If OACT is not NULL, put the old action for SIG in *OACT. */
  62. int __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
  63. {
  64. int result;
  65. struct old_kernel_sigaction kact, koact;
  66. if (act) {
  67. kact.k_sa_handler = act->sa_handler;
  68. kact.sa_mask = act->sa_mask.__val[0];
  69. kact.sa_flags = act->sa_flags;
  70. # ifdef HAVE_SA_RESTORER
  71. # if _MIPS_SIM == _ABIO32
  72. kact.sa_restorer = act->sa_restorer;
  73. # else
  74. kact.sa_restorer = &restore_rt;
  75. # endif
  76. # endif
  77. }
  78. result = __syscall_sigaction(sig, act ? __ptrvalue (&kact) : NULL,
  79. oact ? __ptrvalue (&koact) : NULL);
  80. if (result < 0) {
  81. __set_errno(-result);
  82. return -1;
  83. }
  84. if (oact) {
  85. oact->sa_handler = koact.k_sa_handler;
  86. oact->sa_mask.__val[0] = koact.sa_mask;
  87. oact->sa_flags = koact.sa_flags;
  88. # ifdef HAVE_SA_RESTORER
  89. oact->sa_restorer = koact.sa_restorer;
  90. # endif
  91. }
  92. return result;
  93. }
  94. #endif
  95. #ifndef LIBC_SIGACTION
  96. libc_hidden_proto(sigaction)
  97. weak_alias(__libc_sigaction,sigaction)
  98. libc_hidden_weak(sigaction)
  99. #endif