1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup rtems_bsd_rtems |
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5 | * |
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6 | * @brief TODO. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Copyright (c) 2014 embedded brains GmbH. All rights reserved. |
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11 | * |
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12 | * embedded brains GmbH |
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13 | * Dornierstr. 4 |
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14 | * 82178 Puchheim |
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15 | * Germany |
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16 | * <rtems@embedded-brains.de> |
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17 | * |
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18 | * Redistribution and use in source and binary forms, with or without |
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19 | * modification, are permitted provided that the following conditions |
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20 | * are met: |
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21 | * 1. Redistributions of source code must retain the above copyright |
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22 | * notice, this list of conditions and the following disclaimer. |
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23 | * 2. Redistributions in binary form must reproduce the above copyright |
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24 | * notice, this list of conditions and the following disclaimer in the |
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25 | * documentation and/or other materials provided with the distribution. |
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26 | * |
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27 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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28 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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29 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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30 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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31 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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32 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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33 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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34 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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35 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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36 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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37 | * SUCH DAMAGE. |
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38 | */ |
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39 | |
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40 | #include <machine/rtems-bsd-user-space.h> |
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41 | #include <machine/rtems-bsd-program.h> |
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42 | |
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43 | #include <syslog.h> |
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44 | #include <stdarg.h> |
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45 | #include <errno.h> |
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46 | #include <stdio.h> |
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47 | #include <string.h> |
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48 | |
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49 | typedef struct { |
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50 | int mask; |
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51 | } rtems_bsd_syslog_context; |
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52 | |
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53 | /* FIXME: This should be thread specific */ |
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54 | static rtems_bsd_syslog_context rtems_bsd_syslog_instance = { |
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55 | .mask = LOG_UPTO(LOG_DEBUG) |
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56 | }; |
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57 | |
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58 | static const char * const rtems_bsd_syslog_priorities[] = { |
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59 | [LOG_EMERG] = "emerg", |
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60 | [LOG_ALERT] = "alert", |
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61 | [LOG_CRIT] = "crit", |
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62 | [LOG_ERR] = "err", |
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63 | [LOG_WARNING] = "warning", |
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64 | [LOG_NOTICE] = "notice", |
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65 | [LOG_INFO] = "info", |
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66 | [LOG_DEBUG] = "debug" |
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67 | }; |
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68 | |
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69 | static rtems_bsd_syslog_context * |
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70 | rtems_bsd_syslog_get_context(void) |
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71 | { |
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72 | return &rtems_bsd_syslog_instance; |
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73 | } |
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74 | |
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75 | static void |
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76 | rtems_bsd_syslog_format_buffer_overflow(void) |
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77 | { |
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78 | fputs("err: syslog: format buffer overflow\n", stderr); |
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79 | } |
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80 | |
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81 | void |
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82 | syslog(int priority, const char *format, ...) |
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83 | { |
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84 | va_list ap; |
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85 | |
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86 | va_start(ap, format); |
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87 | vsyslog(priority, format, ap); |
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88 | va_end(ap); |
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89 | } |
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90 | |
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91 | void |
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92 | vsyslog(int priority, const char *format, va_list ap) |
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93 | { |
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94 | rtems_bsd_syslog_context *ctx = rtems_bsd_syslog_get_context(); |
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95 | int pri = LOG_PRI(priority); |
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96 | char fmt[128]; |
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97 | char buf[128]; |
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98 | const char *src; |
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99 | char *dst; |
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100 | size_t rem; |
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101 | char *m; |
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102 | int n; |
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103 | size_t len; |
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104 | |
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105 | if ((LOG_MASK(pri) & ctx->mask) == 0) { |
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106 | return; |
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107 | } |
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108 | |
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109 | /* Expand the %m in the format string and add a newline character */ |
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110 | |
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111 | src = format; |
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112 | dst = &fmt[0]; |
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113 | rem = sizeof(fmt) - 2; |
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114 | |
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115 | while ((m = strstr(src, "%m")) != NULL) { |
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116 | size_t c = m - src; |
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117 | |
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118 | if (c > rem) { |
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119 | rtems_bsd_syslog_format_buffer_overflow(); |
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120 | return; |
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121 | } |
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122 | |
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123 | memcpy(dst, src, c); |
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124 | dst += c; |
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125 | src += c + 2; |
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126 | rem -= c; |
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127 | |
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128 | n = sniprintf(dst, rem, "%s", strerror(errno)); |
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129 | if (n > rem || n < 0) { |
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130 | rtems_bsd_syslog_format_buffer_overflow(); |
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131 | return; |
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132 | } |
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133 | |
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134 | dst += (size_t) n; |
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135 | rem -= (size_t) n; |
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136 | } |
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137 | |
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138 | len = strlen(src); |
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139 | if (len > rem) { |
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140 | rtems_bsd_syslog_format_buffer_overflow(); |
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141 | return; |
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142 | } |
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143 | |
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144 | memcpy(dst, src, len); |
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145 | dst += len; |
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146 | dst[0] = '\n'; |
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147 | dst[1] = '\0'; |
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148 | |
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149 | /* Print into buffer */ |
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150 | |
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151 | dst = &buf[0]; |
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152 | rem = sizeof(buf) - 1; |
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153 | |
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154 | n = sniprintf(dst, rem, "%s: ", rtems_bsd_syslog_priorities[pri]); |
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155 | if (n <= rem) { |
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156 | dst += (size_t) n; |
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157 | rem -= (size_t) n; |
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158 | } |
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159 | |
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160 | n = sniprintf(dst, rem, "%s: ", rtems_bsd_program_get_name()); |
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161 | if (n <= rem) { |
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162 | dst += (size_t) n; |
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163 | rem -= (size_t) n; |
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164 | } |
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165 | |
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166 | vsniprintf(dst, rem, &fmt[0], ap); |
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167 | |
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168 | /* Write in one rush */ |
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169 | |
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170 | fputs(&buf[0], stderr); |
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171 | } |
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172 | |
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173 | void |
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174 | openlog(const char *ident, int option, int facility) |
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175 | { |
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176 | /* TODO */ |
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177 | } |
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178 | |
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179 | void |
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180 | closelog(void) |
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181 | { |
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182 | /* TODO */ |
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183 | } |
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184 | |
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185 | int |
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186 | setlogmask(int mask) |
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187 | { |
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188 | rtems_bsd_syslog_context *ctx = rtems_bsd_syslog_get_context(); |
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189 | int cur = ctx->mask; |
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190 | |
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191 | ctx->mask = mask & LOG_UPTO(LOG_DEBUG); |
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192 | |
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193 | return cur; |
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194 | } |
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