annotate Common/Drivers/Src/syscalls.c @ 481:89f6857276f8 Improve_Button_Sleep

Bugfix calculation of string center position: Strings shown on the right side at surface mode use special characters ('\016' and '\017') to switch font size. Headline strings like "Desaturation" could also be set to the target font directly, because they do not contain mixed font sizes, but nethertheless they are using the special characters. The function calculating the offset needed to display the strinter with center alignment did not consider the small font size => misalignment during string display. To avoid this an evaluation of the special characters has been added to the helper function.
author ideenmodellierer
date Mon, 18 May 2020 21:51:08 +0200
parents 5f11787b4f42
children
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38
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1 /**
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2 *****************************************************************************
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3 **
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4 ** File : syscalls.c
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5 **
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6 ** Abstract : System Workbench Minimal System calls file
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7 **
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8 ** For more information about which c-functions
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9 ** need which of these lowlevel functions
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10 ** please consult the Newlib libc-manual
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11 **
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12 ** Environment : System Workbench for MCU
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13 **
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14 ** Distribution: The file is distributed “as is,” without any warranty
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15 ** of any kind.
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16 **
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17 *****************************************************************************
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18 **
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19 ** <h2><center>&copy; COPYRIGHT(c) 2014 Ac6</center></h2>
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20 **
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21 ** Redistribution and use in source and binary forms, with or without modification,
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22 ** are permitted provided that the following conditions are met:
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23 ** 1. Redistributions of source code must retain the above copyright notice,
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24 ** this list of conditions and the following disclaimer.
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25 ** 2. Redistributions in binary form must reproduce the above copyright notice,
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26 ** this list of conditions and the following disclaimer in the documentation
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27 ** and/or other materials provided with the distribution.
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28 ** 3. Neither the name of Ac6 nor the names of its contributors
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29 ** may be used to endorse or promote products derived from this software
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30 ** without specific prior written permission.
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31 **
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32 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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33 ** AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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34 ** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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35 ** DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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36 ** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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37 ** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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38 ** SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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39 ** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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40 ** OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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41 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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42 **
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43 *****************************************************************************
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44 */
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45
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46 /* Includes */
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47 #include <sys/stat.h>
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48 #include <stdlib.h>
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49 #include <errno.h>
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50 #include <stdio.h>
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51 #include <signal.h>
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52 #include <time.h>
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53 #include <sys/time.h>
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54 #include <sys/times.h>
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55
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56
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57 /* Variables */
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58 //#undef errno
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59 extern int errno;
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60 extern int __io_putchar(int ch) __attribute__((weak));
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61 extern int __io_getchar(void) __attribute__((weak));
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62
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63 register char * stack_ptr asm("sp");
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64
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65 char *__env[1] = { 0 };
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66 char **environ = __env;
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67
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68
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69 /* Functions */
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70 void initialise_monitor_handles()
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71 {
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72 }
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73
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74 int _getpid(void)
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75 {
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76 return 1;
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77 }
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78
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79 int _kill(int pid, int sig)
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80 {
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81 errno = EINVAL;
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82 return -1;
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83 }
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84
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85 void _exit (int status)
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86 {
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87 _kill(status, -1);
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88 while (1) {} /* Make sure we hang here */
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89 }
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90
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91 int _read (int file, char *ptr, int len)
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92 {
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93 int DataIdx;
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94
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95 for (DataIdx = 0; DataIdx < len; DataIdx++)
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96 {
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97 *ptr++ = __io_getchar();
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98 }
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99
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100 return len;
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101 }
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102
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103 int _write(int file, char *ptr, int len)
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104 {
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105 int DataIdx;
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106
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107 for (DataIdx = 0; DataIdx < len; DataIdx++)
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108 {
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109 __io_putchar(*ptr++);
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110 }
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111 return len;
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112 }
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113
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114 caddr_t _sbrk(int incr)
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115 {
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116 extern char end asm("end");
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117 static char *heap_end;
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118 char *prev_heap_end;
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119
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120 if (heap_end == 0)
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121 heap_end = &end;
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122
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123 prev_heap_end = heap_end;
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124 if (heap_end + incr > stack_ptr)
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125 {
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126 // write(1, "Heap and stack collision\n", 25);
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127 // abort();
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128 errno = ENOMEM;
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129 return (caddr_t) -1;
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130 }
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131
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132 heap_end += incr;
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133
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134 return (caddr_t) prev_heap_end;
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135 }
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136
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137 int _close(int file)
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138 {
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139 return -1;
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140 }
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141
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142
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143 int _fstat(int file, struct stat *st)
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144 {
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145 st->st_mode = S_IFCHR;
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146 return 0;
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147 }
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148
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149 int _isatty(int file)
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150 {
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151 return 1;
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152 }
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153
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154 int _lseek(int file, int ptr, int dir)
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155 {
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156 return 0;
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157 }
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158
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159 int _open(char *path, int flags, ...)
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160 {
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161 /* Pretend like we always fail */
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162 return -1;
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163 }
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164
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165 int _wait(int *status)
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166 {
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167 errno = ECHILD;
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168 return -1;
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169 }
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170
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171 int _unlink(char *name)
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172 {
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173 errno = ENOENT;
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174 return -1;
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175 }
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176
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177 int _times(struct tms *buf)
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178 {
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179 return -1;
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180 }
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181
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182 int _stat(char *file, struct stat *st)
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183 {
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184 st->st_mode = S_IFCHR;
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185 return 0;
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186 }
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187
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188 int _link(char *old, char *new)
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189 {
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190 errno = EMLINK;
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191 return -1;
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192 }
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193
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194 int _fork(void)
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195 {
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196 errno = EAGAIN;
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197 return -1;
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198 }
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199
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200 int _execve(char *name, char **argv, char **env)
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201 {
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202 errno = ENOMEM;
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203 return -1;
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204 }