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annotate io.c @ 19:5c6155c8e9b6

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Handle signals Handled signals are generally blocked and only unblocked when doing blocking I/O, i.e. either when reading commands or printing results. A (possibly queued) signal will then interrupt I/O and can be dealt with in the main loop.
author Guido Berhoerster <guido+pwm@berhoerster.name>
date Fri, 01 Sep 2017 22:33:41 +0200
parents
children ec01c579024a
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rev   line source
19
5c6155c8e9b6 Handle signals
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1 /*
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2 * Copyright (C) 2017 Guido Berhoerster <guido+pwm@berhoerster.name>
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3 *
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4 * Permission is hereby granted, free of charge, to any person obtaining
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5 * a copy of this software and associated documentation files (the
5c6155c8e9b6 Handle signals
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6 * "Software"), to deal in the Software without restriction, including
5c6155c8e9b6 Handle signals
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7 * without limitation the rights to use, copy, modify, merge, publish,
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
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8 * distribute, sublicense, and/or sell copies of the Software, and to
5c6155c8e9b6 Handle signals
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9 * permit persons to whom the Software is furnished to do so, subject to
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10 * the following conditions:
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11 *
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12 * The above copyright notice and this permission notice shall be included
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13 * in all copies or substantial portions of the Software.
5c6155c8e9b6 Handle signals
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14 *
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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22 */
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23
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24 #include "compat.h"
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25
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26 #ifdef HAVE_ERR_H
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27 #include <err.h>
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28 #endif /* HAVE_ERR_H */
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29 #include <errno.h>
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30 #include <setjmp.h>
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31 #include <signal.h>
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32 #include <stdarg.h>
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33 #include <stdio.h>
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34 #include <stdio.h>
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35 #include <string.h>
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36 #include <unistd.h>
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37
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38 #include "io.h"
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39 #include "util.h"
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40 #include "pwm.h"
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41
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42 static sigjmp_buf signal_env;
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43
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44 static void
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45 signal_handler(int signal_no)
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46 {
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47 siglongjmp(signal_env, signal_no);
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48 }
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49
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50 int
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51 io_gl_complete_nothing(WordCompletion *cpl, void *data, const char *line,
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52 int word_end)
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53 {
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54 return (0);
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55 }
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56
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57 enum io_status
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58 io_get_char(const char *prompt, int *cp)
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59 {
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60 enum io_status retval = IO_OK;
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61 GetLine *gl = NULL;
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62
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63 gl = new_GetLine(16, 0);
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64 if (gl== NULL) {
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65 err(1, "new_GetLine");
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66 }
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67 gl_catch_blocked(gl);
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68
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69 /* prompt with echo off */
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70 gl_echo_mode(gl, 0);
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71 if ((*cp = gl_query_char(gl, prompt, '\0')) == EOF) {
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72 switch (gl_return_status(gl)) {
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73 case GLR_SIGNAL:
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74 retval = IO_SIGNAL;
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75 break;
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76 case GLR_ERROR:
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77 errx(1, "gl_get_line: %s",
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78 gl_error_message(gl, NULL, 0));
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79 default:
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80 errx(1, "unknown error in gl_get_line");
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81 }
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82 }
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83
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84 /* erase prompt */
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85 if (io_printf("\r%*s\r", (int)strlen(prompt), "") == IO_SIGNAL) {
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86 retval = IO_SIGNAL;
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87 }
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88
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89 del_GetLine(gl);
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90
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91 return (retval);
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92 }
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93
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94 enum io_status
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95 io_get_line(GetLine *gl, const char *prompt, int with_history,
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96 const char *start_line, int start_pos, size_t buf_size, char *buf)
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97 {
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98 enum io_status retval = IO_OK;
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99 GetLine *gl_private = NULL;
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100 GlHistoryState state;
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101 char *line;
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102
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103 if (gl == NULL) {
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104 gl = gl_private = new_GetLine(buf_size - 1, 0);
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105 if (gl_private == NULL) {
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106 err(1, "new_GetLine");
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107 }
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108 gl_catch_blocked(gl_private);
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109 }
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110
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111 gl_state_of_history(gl, &state);
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112 gl_toggle_history(gl, with_history);
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113
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114 line = gl_get_line(gl, prompt, start_line, start_pos);
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115 if (line == NULL) {
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116 switch (gl_return_status(gl)) {
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117 case GLR_BLOCKED:
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118 break;
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119 case GLR_SIGNAL:
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120 retval = IO_SIGNAL;
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121 goto out;
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122 case GLR_EOF:
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123 retval = IO_EOF;
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124 goto out;
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125 case GLR_ERROR:
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126 errx(1, "gl_get_line: %s",
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127 gl_error_message(gl, NULL, 0));
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128 default:
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129 errx(1, "unknown error in gl_get_line");
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130 }
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131 }
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132
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133 if (snprintf(buf, buf_size, "%s", line) >= (int)buf_size) {
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134 retval = IO_TRUNCATED;
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135 }
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136
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137 out:
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138 if (gl != NULL) {
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139 gl_toggle_history(gl, state.enabled);
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140 }
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141 del_GetLine(gl_private);
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142
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143 return (retval);
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144 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
145
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
146 enum io_status
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
147 io_get_password(const char *prompt, const char *confirm_prompt,
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
148 size_t buf_size, char *buf)
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
149 {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
150 enum io_status retval = IO_OK;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
151 GetLine *gl = NULL;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
152 size_t len;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
153 char *password_buf = NULL;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
154 char *confirm_buf = NULL;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
155
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
156 gl = new_GetLine(buf_size - 1, 0);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
157 if (gl == NULL) {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
158 err(1, "new_GetLine");
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
159 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
160 /* disable default filename completion */
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
161 gl_customize_completion(gl, NULL, io_gl_complete_nothing);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
162 gl_echo_mode(gl, 0);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
163
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
164 password_buf = xmalloc(buf_size);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
165
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
166 if (io_get_line(gl, prompt, 0, NULL, 0, buf_size, password_buf) ==
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
167 IO_SIGNAL) {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
168 retval = IO_SIGNAL;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
169 goto out;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
170 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
171 len = strlen(password_buf);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
172 /* strip trailing newline */
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
173 if ((len > 0) && (password_buf[len - 1] == '\n')) {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
174 password_buf[--len] = '\0';
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
175 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
176 if (len == 0) {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
177 retval = IO_PASSWORD_EMPTY;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
178 goto out;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
179 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
180
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
181 if (confirm_prompt != NULL) {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
182 if (io_printf("\n") == IO_SIGNAL) {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
183 retval = IO_SIGNAL;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
184 goto out;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
185 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
186
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
187 /* confirm new password */
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
188 confirm_buf = xmalloc(buf_size);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
189 if (io_get_line(gl, confirm_prompt, 0, NULL, 0,
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
190 buf_size, confirm_buf) == IO_SIGNAL) {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
191 retval = IO_SIGNAL;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
192 goto out;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
193 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
194 len = strlen(confirm_buf);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
195 /* strip trailing newline */
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
196 if ((len > 0) && (confirm_buf[len - 1] == '\n')) {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
197 confirm_buf[--len] = '\0';
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
198 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
199 if (strcmp(password_buf, confirm_buf) != 0) {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
200 retval = IO_PASSWORD_MISMATCH;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
201 goto out;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
202 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
203 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
204
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
205 strcpy(buf, password_buf);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
206
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
207 out:
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
208 if (io_printf("\n") == IO_SIGNAL) {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
209 retval = IO_SIGNAL;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
210 goto out;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
211 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
212 free(password_buf);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
213 free(confirm_buf);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
214 del_GetLine(gl);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
215
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
216 return (retval);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
217 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
218
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
219 enum io_status
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
220 io_dputs(int fd, const char *s)
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
221 {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
222 struct sigaction action;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
223 struct sigaction oaction;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
224 int signal_no = 0;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
225 const char *p = s;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
226 size_t remaining;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
227 ssize_t n;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
228
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
229 /* install signal handlers */
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
230 action.sa_handler = signal_handler;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
231 action.sa_flags = 0;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
232 sigemptyset(&action.sa_mask);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
233 sigaddset(&action.sa_mask, SIGINT);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
234 sigaddset(&action.sa_mask, SIGTERM);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
235 sigaddset(&action.sa_mask, SIGHUP);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
236 sigaddset(&action.sa_mask, SIGQUIT);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
237 if ((sigaction(SIGINT, &action, &oaction) != 0) ||
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
238 (sigaction(SIGTERM, &action, &oaction) != 0) ||
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
239 (sigaction(SIGHUP, &action, &oaction) != 0) ||
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
240 (sigaction(SIGQUIT, &action, &oaction) != 0)) {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
241 err(1, "sigaction");
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
242 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
243
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
244 if ((signal_no = sigsetjmp(signal_env, 1)) != 0) {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
245 /* signal received, signal mask has been restored */
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
246 goto out;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
247 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
248
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
249 remaining = strlen(s);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
250 while (remaining > 0) {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
251 pwm_unblock_signals();
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
252 n = write(fd, p, remaining);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
253 if ((n < (int)remaining) && (errno != EINTR)) {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
254 err(1, "write");
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
255 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
256 pwm_block_signals();
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
257 remaining -= MAX(n, 0);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
258 p += MAX(n, 0);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
259 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
260
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
261 out:
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
262 /* restore signal handlers */
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
263 if ((sigaction(SIGINT, &oaction, NULL) != 0) ||
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
264 (sigaction(SIGTERM, &oaction, NULL) != 0) ||
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
265 (sigaction(SIGHUP, &oaction, NULL) != 0) ||
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
266 (sigaction(SIGQUIT, &oaction, NULL) != 0)) {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
267 err(1, "sigaction");
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
268 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
269
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
270 return ((signal_no == 0) ? IO_OK : IO_SIGNAL);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
271 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
272
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
273 enum io_status
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
274 io_vdprintf(int fd, const char *fmt, va_list args)
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
275 {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
276 enum io_status retval;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
277 char *buf;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
278
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
279 xvasprintf(&buf, fmt, args);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
280 retval = io_dputs(fd, buf);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
281 free(buf);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
282
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
283 return (retval);
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
284 }
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
285
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
286 enum io_status
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
287 io_dprintf(int fd, const char *fmt, ...)
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
288 {
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
289 enum io_status retval;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
290 va_list args;
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
291
5c6155c8e9b6 Handle signals
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
292 va_start(args, fmt);
5c6155c8e9b6 Handle signals
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293 retval = io_vdprintf(fd, fmt, args);
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294 va_end(args);
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295
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296 return (retval);
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297 }
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298
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299 enum io_status
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300 io_printf(const char *fmt, ...)
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301 {
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302 enum io_status retval;
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303 va_list args;
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304
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305 va_start(args, fmt);
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306 retval = io_vdprintf(STDOUT_FILENO, fmt, args);
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307 va_end(args);
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308
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309 return (retval);
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310 }