1 | /* common.c - functions common to server.c and client.c
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2 |
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3 |
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4 |
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5 | 06/19
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6 | - fixed silly bug in create_and_watch_fifo_for_commands()
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7 |
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8 | 06/16
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9 | - added program_still_running()
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10 |
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11 | 06/14
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12 | - added create_and_watch_fifo_for_commands() from server.c
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13 | - if log_it(fatal,...) then call terminate_daemon()
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14 |
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15 | 06/11
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16 | - added register_pid(), set_signals()
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17 | - commented code a bit
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18 |
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19 | 06/10
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20 | - create function to call external executable in background
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21 | - create function to wait for it to terminate & to grab its result
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22 | - put them in common.c
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23 |
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24 |
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25 |
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26 | */
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27 |
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28 | #include "structs.h"
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29 | #include <stdarg.h>
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30 |
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31 | #define CLIENT_RCFILE "/root/.monitas-client.rc"
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32 | #define CLIENT_COMDEV "/var/spool/monitas/client-input.dev"
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33 | #define CLIENT_LOGFILE "/var/log/monitas-client.log"
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34 | #define SERVER_COMDEV "/var/spool/monitas/server-input.dev"
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35 | #define SERVER_STATUS_FILE "/var/spool/monitas/server-status.txt"
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36 | #define SERVER_LOGFILE "/var/log/monitas-server.log"
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37 |
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38 |
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39 | extern char g_command_fifo[MAX_STR_LEN+1];
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40 | extern char g_logfile[MAX_STR_LEN+1];
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41 | extern char *call_program_and_get_last_line_of_output(char*);
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42 | extern int call_program_and_log_output (char *);
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43 | extern bool does_file_exist (char *);
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44 | extern int make_hole_for_file (char *outfile_fname);
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45 | extern int process_incoming_command(char*);
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46 | extern void terminate_daemon(int);
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47 |
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48 |
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49 | void call_program_in_background(pthread_t*, char*);
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50 | void *call_prog_in_bkgd_SUB(void*);
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51 | int create_and_watch_fifo_for_commands(char*);
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52 | int get_bkgd_prog_result(pthread_t*);
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53 | //void log_it_SUB(char*, t_loglevel, char*);
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54 | bool program_still_running(char*);
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55 | int receive_file_from_socket(FILE*fout, int socket_fd);
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56 | void register_pid(pid_t, char*);
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57 | void set_signals(bool);
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58 | char *tmsg_to_string(t_msg msg_type);
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59 | int read_block_from_fd(int, char*, int);
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60 | void termination_in_progress(int sig);
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61 | int transmit_file_to_socket(FILE*fin, int socket_fd);
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62 | char *my_basename(char *path);
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63 | int parse_options(int argc, char *argv[]);
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64 |
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65 | /* global vars */
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66 |
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67 | /* global (semi-) static data.
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68 | * Always use following pointer to access this struct!!
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69 | * Struct is initialized by parse_options() */
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70 | static struct s_globaldata _global_data;
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71 | /* Global Pointer to access the (semi-) static data */
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72 | struct s_globaldata *g = & _global_data;
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73 |
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74 |
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75 |
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76 | /*-----------------------------------------------------------*/
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77 |
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78 |
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79 |
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80 | void call_program_in_background(pthread_t *thread, char*command)
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81 | /*
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82 | Purpose:Execute external binary in a background thread created
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83 | specially for this purpose. Return. Leave binary running.
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84 | Params: thread - [returned] thread running in background
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85 | command - binary call to be executed
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86 | Return: 0 if prog started ok; nonzero if failure
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87 | NB: Use get_bkgd_prog_result() to wait for binary to terminate
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88 | and to get binary's result (zero or nonzero)
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89 | */
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90 | {
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91 | int res;
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92 |
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93 | res = pthread_create(thread, NULL, call_prog_in_bkgd_SUB, (void*)command);
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94 | if (res) { log_it(fatal, "Unable to call program in background - thread creation failure %s", command); }
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95 | log_it(debug, "Done creating pthread. Will continue now.");
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96 | }
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97 |
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98 |
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99 |
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100 | /*-----------------------------------------------------------*/
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101 |
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102 |
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103 |
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104 | void *call_prog_in_bkgd_SUB(void*cmd)
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105 | {
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106 | /*
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107 | Purpose:Subroutine of call_program_in_background()
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108 | Params: cmd - binary call to be executed
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109 | Return: None
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110 | */
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111 | int res;
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112 |
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113 | log_it(debug, "Calling '%s' in background pthread", cmd);
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114 | res = system(cmd);
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115 | log_it(debug, "'%s' is returning from bkgd process - res=%d", cmd, res);
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116 | pthread_exit((void*)res);
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117 | }
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118 |
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119 |
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120 |
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121 | /*-----------------------------------------------------------*/
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122 |
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123 |
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124 |
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125 | int create_and_watch_fifo_for_commands(char*devpath)
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126 | /*
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127 | Purpose:Create a FIFO (device). Open it. Read commands from it
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128 | if/when they're echoed to it (e.g. backup, restore, ...)
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129 | Params: devpath - path+filename of FIFO to create
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130 | Return: result (nonzero=failure; else, infinite loop & notional 0)
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131 | */
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132 | {
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133 | char incoming[MAX_STR_LEN+1];
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134 | int res=0, fd, len, pos=0;
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135 |
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136 | res = make_hole_for_file(devpath) + mkfifo(devpath, 700);
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137 | if (res) { log_it(error, "Unable to prepare command FIFO %s", devpath); return(res); }
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138 | strncpy(g_command_fifo, devpath, MAX_STR_LEN);
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139 | if (!(fd = open(g_command_fifo, O_RDONLY))) { log_it(error, "Unable to openin command FIFO %s", g_command_fifo); return(1); }
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140 | // log_it(info, "Awaiting commands from FIFO");
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141 | for(;;)
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142 | {
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143 | len=read(fd, incoming+pos, 1);
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144 | if (len==0) { usleep(1000); continue; }
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145 | pos+=len;
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146 | incoming[pos]='\0';
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147 | if (incoming[pos-1]=='\n' || pos>=MAX_STR_LEN)
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148 | {
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149 | incoming[pos-1]='\0';
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150 | len=pos=0;
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151 | res=process_incoming_command(incoming);
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152 | if (res)
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153 | {
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154 | log_it(error, "%s <-- errors occurred during processing", incoming);
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155 | }
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156 | else
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157 | {
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158 | log_it(info, "%s <-- command received OK", incoming);
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159 | }
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160 | }
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161 | } // forever
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162 | return(0);
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163 | }
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164 |
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165 |
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166 | /*-----------------------------------------------------------*/
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167 |
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168 |
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169 |
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170 | int get_bkgd_prog_result(pthread_t *thread)
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171 | /*
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172 | Purpose:Wait for external binary (running in background) to terminate.
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173 | Discover how it ended (w/success or w/failure?).
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174 | Params: thread - thread running in background
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175 | Return: result (0=success, nonzero=failure)
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176 | NB: Binary was executed by call_program_in_background(). This
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177 | subroutine should be called sometime after that call.
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178 | */
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179 | {
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180 | void* vp;
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181 | // void**pvp;
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182 | int res;
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183 | // char *p, result_str[MAX_STR_LEN+1];
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184 |
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185 | /* pvp=&vp;
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186 | vp=(void*)result_str;
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187 | strcpy(result_str, "(uninitialized)");
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188 | log_it(debug, "Waiting for bkgd prog to finish, so that we can get its result");
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189 | if (pthread_join(*thread, pvp)) { log_it(fatal, "pthread_join failed"); }
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190 | p = result_str;
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191 | p = (char*)vp;
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192 | res = atoi(p);
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193 | log_it(debug, "pthread res = %d ('%s')", res, p);
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194 | */
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195 | log_it(debug, "Waiting for bkgd prog to finish, so that we can get its result");
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196 | if ((res = pthread_join(*thread, &vp)) != 0)
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197 | {
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198 | log_it(fatal, "pthread_join failed with error %s",
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199 | ((res==ESRCH) ? "ESRCH - No thread could be found corresponding to that specified by 'thread'" :
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200 | ((res==EINVAL) ? "EINVAL - The thread has been detached OR Another thread is already waiting on termination of it." :
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201 | ((res==EDEADLK) ? "EDEADLK - The 'tread' argument refers to the calling thread." :
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202 | "UNSPECIFIED"))));
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203 | }
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204 | *thread = 0;
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205 | res = (int) vp;
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206 | log_it(debug, "pthread res = %d ('%s')", res, (res>256 || res<-256) ? (char*)vp : "");
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207 | return(res);
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208 | }
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209 |
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210 |
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211 |
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212 | /*-----------------------------------------------------------*/
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213 |
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214 |
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215 |
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216 | void log_it_SUB(char *logfile, t_loglevel level, char *sz_message)
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217 | /*
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218 | Purpose:Log event and its level of severity.
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219 | Params: level - level of severity (debug/info/warn/error/fatal)
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220 | sz_message - message/event [string]
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221 | Return: None
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222 | */
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223 | {
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224 | char *sz_level = "";
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225 | time_t time_rec;
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226 | struct tm tm;
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227 | FILE*fout;
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228 |
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229 | time(&time_rec);
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230 | localtime_r(&time_rec, &tm);
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231 | switch(level)
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232 | {
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233 | case debug: sz_level = "DEBUG"; break;
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234 | case info: sz_level = "INFO "; break;
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235 | case warn: sz_level = "WARN "; break;
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236 | case error: sz_level = "ERROR"; break;
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237 | case fatal: sz_level = "FATAL"; break;
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238 | default: sz_level = "UNKWN"; break;
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239 | }
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240 | if ((int)level >= LOG_THESE_AND_HIGHER)
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241 | {
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242 | while (!(fout=fopen(logfile,"a")))
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243 | { usleep((int)(random()%32768)); }
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244 | fprintf(fout, "%02d:%02d:%02d %s: %s\n", tm.tm_hour, tm.tm_min, tm.tm_sec, sz_level, sz_message);
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245 | fclose(fout);
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246 | }
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247 | if (level==fatal)
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248 | {
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249 | fprintf(stderr, "Aborting now. See %s for more information.\n", logfile);
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250 | terminate_daemon(0);
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251 | exit(1);
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252 | }
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253 | }
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254 |
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255 |
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256 |
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257 | /*-----------------------------------------------------------*/
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258 |
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259 |
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260 |
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261 | void logToFile(char *logfile, t_loglevel level, char *filename, char *lineno, char *funcname, char *sz_message, ...)
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262 | /*
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263 | Purpose: Log <sz_message> and its <level> of severity to <logfile>
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264 | Params: logfile name of logfile
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265 | level level of severity (debug/info/warn/error/fatal)
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266 | sz_message message/event [string]
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267 | for <level>==debug the location of the event is specified by:
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268 | filename name of the file, where <sz_message> was created
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269 | lineno number of the line [string], where <sz_message> was created
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270 | funcname name of the function, that created the event
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271 | Return: None
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272 | */
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273 | {
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274 | char *sz_level = "";
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275 | time_t time_rec;
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276 | struct tm tm;
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277 | FILE *fout;
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278 | va_list ap;
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279 |
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280 |
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281 | time(&time_rec);
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282 | va_start(ap, sz_message); // initialize the variable arguments
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283 | localtime_r(&time_rec, &tm);
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284 | switch(level)
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285 | {
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286 | case debug:
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287 | {
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288 | // sz_level = "DEBUG"; break;
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289 | // at debug level we add filename, lineno and functionname instead of "DEBUG"
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290 | // i.e. "file.c:123, subfunction()"
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291 | char *fmt = "%s:%s, %s()";
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292 | // calculate length of resulting string:
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293 | size_t size = strlen(fmt) -(3*2) + 1 // length of fmt-string minus 3x 2 chars ("%s") plus 1 for terminating \0'
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294 | + strlen(filename) // plus length of filename
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295 | + strlen(lineno) // plus length of linenumber
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296 | + strlen(funcname); // plus length of functionname
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297 | sz_level = alloca(size); // memory is automatically free'd when this function returns
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298 | snprintf(sz_level, size, "%s:%s, %s()", filename, lineno, funcname);
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299 | } break;
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300 | case info: sz_level = "INFO "; break;
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301 | case warn: sz_level = "WARN "; break;
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302 | case error: sz_level = "ERROR"; break;
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303 | case fatal: sz_level = "FATAL"; break;
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304 | default: sz_level = "UNKWN"; break;
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305 | }
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306 | if ((int)level >= LOG_THESE_AND_HIGHER)
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307 | {
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308 | while (!(fout=fopen(logfile,"a")))
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309 | { usleep((int)(random()%32768)); }
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310 | fprintf(fout, "%02d:%02d:%02d %s: ", tm.tm_hour, tm.tm_min, tm.tm_sec, sz_level); // print time and level
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311 | vfprintf(fout, sz_message, ap); // print message (and further args)
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312 | fprintf(fout, "\n");
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313 | fclose(fout);
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314 | }
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315 | va_end(ap); // finalize the variable arguments
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316 | if (level==fatal)
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317 | {
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318 | fprintf(stderr, "Aborting now. See %s for more information.\n", logfile);
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319 | terminate_daemon(0);
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320 | exit(1);
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321 | }
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322 | }
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323 |
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324 |
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325 |
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326 | /*-----------------------------------------------------------*/
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327 |
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328 |
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329 |
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330 | bool program_still_running(char*command)
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331 | {
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332 | char comm_sub[MAX_STR_LEN+1],
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333 | tmp[MAX_STR_LEN+1];
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334 | strncpy(comm_sub, command, 40);
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335 | comm_sub[40] = '\0';
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336 | sprintf(tmp, "ps ax | grep \"%s\" | grep -v \"ps ax\" | grep -v \"grep \"", comm_sub);
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337 | if (call_program_and_log_output(tmp))
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338 | { return(false); }
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339 | else
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340 | { return(true); }
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341 | }
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342 |
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343 |
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344 |
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345 | /*-----------------------------------------------------------*/
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346 |
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347 |
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348 |
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349 | int read_block_from_fd(int socket_fd, char*buf, int len_to_read)
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350 | /*
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351 | Purpose:Read N bytes from socket, into buffer
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352 | Params: socket_fd - socket to be read from
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353 | buf - buffer where incoming data will be stored
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354 | len_to_read - bytes to be read from socket
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355 | Return: bytes read
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356 | NB: if bytes read < len_to_read then there is
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357 | probably something wrong (e.g. EOF of pipe)
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358 | */
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359 | {
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360 | int length, noof_tries, i=0;
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361 | char tmp[MAX_STR_LEN+1];
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362 |
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363 | // log_it(debug, "Reading from pipe");
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364 | for(length=noof_tries=0; length<len_to_read && noof_tries<10; length+=i)
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365 | {
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366 | i = read(socket_fd, buf+length, len_to_read-length);
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367 | if (i==0) { noof_tries++; }
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368 | if (i<0) { log_it(error, "Error while reading from fd"); return(-1); }
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369 | }
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370 | if (length != len_to_read) { log_it(error, "Unable to continue reading from fd"); }
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371 | sprintf(tmp, "%d of %d bytes read from fd", length, len_to_read);
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372 | return(length);
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373 | }
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374 |
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375 |
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376 |
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377 | /*-----------------------------------------------------------*/
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378 |
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379 |
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380 |
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381 | int receive_file_from_socket(FILE*fout, int socket_fd)
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382 | /*
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383 | Purpose:Receive file from socket and save to disk / stream.
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384 | Params: socket_fd - file descriptor of socket
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385 | fout - file descriptor of output file
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386 | Return: result (0=success, nonzero=failure)
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387 | NB: socket_fd was created with open() but
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388 | fopen was created with fopen(). Different, see? Nyah.
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389 | */
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390 | {
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391 | int res=0, length, rotor=0, incoming_len;
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392 | char tmp[MAX_STR_LEN+1], buf[XFER_BUF_SIZE];
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393 | bool done;
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394 | long long total_length=0;
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395 |
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396 | signal(SIGPIPE, SIG_IGN);
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397 |
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398 | length=99999;
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399 | // sleep(1);
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400 | for(done=false; !done; )
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401 | {
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402 | // usleep(1000);
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403 | length = read_block_from_fd(socket_fd, buf, 3);
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404 | if (length<3) { log_it(debug, "Failed to read header block from fd"); res++; done=true; continue; }
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405 | rotor=(rotor%127)+1;
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406 | sprintf(tmp, "Rotor is %d (I was expecting %d)", buf[0], rotor);
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407 | if (buf[0]==0 && buf[1]==0x7B && buf[2]==0x21) { log_it(debug, "OK, end of stream. Cool."); done=true; continue; }
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408 | // log_it(debug, tmp);
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409 | if (buf[0]!=rotor) { log_it(debug, "Rotors do not match"); res++; break; }
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410 | incoming_len = buf[2];
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411 | if (incoming_len < 0) { incoming_len += 256; }
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412 | incoming_len += buf[1] * 256;
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413 | // memcpy((char*)&incoming_len, buf+1, 2);
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414 | sprintf(tmp, "Expecting %d bytes in block #%d", incoming_len, rotor);
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415 | // log_it(debug, tmp);
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416 | length = read_block_from_fd(socket_fd, buf, incoming_len);
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417 | /*
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418 | for(length=0,i=0; length<incoming_len; length+=i)
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419 | {
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420 | i = read(socket_fd, buf+length, incoming_len-length);
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421 | if (length<0) { log_it(debug, "Unable to read block in from socket_fd"); done=true; }
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422 | else if (length==0) { log_it(debug, "Zero-length block arrived from socket"); }
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423 | sprintf(tmp, "Read %d bytes from socket", i);
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424 | // log_it(debug, tmp);
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425 | }
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426 | */
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427 | if (length != incoming_len) { log_it(debug, "Error reading from socket"); res++; }
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428 | if (fwrite(buf, 1, length, fout)!=length) { log_it(debug, "Error writing data to output file"); res++; }
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429 | sprintf(tmp, "Written %d bytes to output stream", length);
|
---|
430 | total_length += length;
|
---|
431 | // log_it(debug, tmp);
|
---|
432 | }
|
---|
433 | if (total_length==0) { res++; log_it(debug, "Zero-length file received. Silly. I say that's an error."); }
|
---|
434 |
|
---|
435 | signal(SIGPIPE, terminate_daemon);
|
---|
436 |
|
---|
437 | return(res);
|
---|
438 | }
|
---|
439 |
|
---|
440 |
|
---|
441 |
|
---|
442 |
|
---|
443 | /*-----------------------------------------------------------*/
|
---|
444 |
|
---|
445 |
|
---|
446 |
|
---|
447 | void register_pid(pid_t pid, char*name_str)
|
---|
448 | /*
|
---|
449 | Purpose:Register executable's PID in /var/run/monitas-[name_str].pid;
|
---|
450 | store [pid] in data file
|
---|
451 | Params: pid - process ID to be stored in data file
|
---|
452 | name_str - name (e.g. "client" or "server") to be included
|
---|
453 | in the data file name of the PID locking file
|
---|
454 | Return: None
|
---|
455 | NB: Use pid=0 to delete the lock file and unregister the PID
|
---|
456 | */
|
---|
457 | {
|
---|
458 | char tmp[MAX_STR_LEN+1], lockfile_fname[MAX_STR_LEN+1];
|
---|
459 | int res;
|
---|
460 | FILE*fin;
|
---|
461 |
|
---|
462 | sprintf(lockfile_fname, "/var/run/monitas-%s.pid", name_str);
|
---|
463 | if (!pid)
|
---|
464 | {
|
---|
465 | log_it(debug, "Unregistering PID");
|
---|
466 | if (unlink(lockfile_fname)) { log_it(error, "Error unregistering PID"); }
|
---|
467 | return;
|
---|
468 | }
|
---|
469 | if (does_file_exist(lockfile_fname))
|
---|
470 | {
|
---|
471 | tmp[0]='\0';
|
---|
472 | if ((fin=fopen(lockfile_fname,"r"))) { fgets(tmp, MAX_STR_LEN, fin); fclose(fin); }
|
---|
473 | pid = atol(tmp);
|
---|
474 | sprintf(tmp, "ps %ld", (long int)pid);
|
---|
475 | res = call_program_and_log_output(tmp);
|
---|
476 | if (!res)
|
---|
477 | {
|
---|
478 | sprintf(tmp, "I believe the daemon is already running. If it isn't, please delete %s and try again.", lockfile_fname);
|
---|
479 | log_it(fatal, tmp);
|
---|
480 | }
|
---|
481 | }
|
---|
482 | sprintf(tmp, "echo %ld > %s", (long int)getpid(), lockfile_fname);
|
---|
483 | if (system(tmp)) { log_it(fatal, "Cannot register PID"); }
|
---|
484 | }
|
---|
485 |
|
---|
486 |
|
---|
487 |
|
---|
488 | /*-----------------------------------------------------------*/
|
---|
489 |
|
---|
490 |
|
---|
491 |
|
---|
492 | void set_signals(bool on)
|
---|
493 | /*
|
---|
494 | Purpose:Turn on/off signal-trapping
|
---|
495 | Params: on - turn on or off (true=on, false=off)
|
---|
496 | Return: None
|
---|
497 | */
|
---|
498 | {
|
---|
499 | int signals[]= { SIGKILL, SIGPIPE, SIGTERM, SIGHUP, SIGTRAP, SIGABRT, SIGINT, SIGSTOP, 0 };
|
---|
500 | int i;
|
---|
501 | for (i=0; signals[i]; i++)
|
---|
502 | {
|
---|
503 | if (on)
|
---|
504 | { signal(signals[i], terminate_daemon); }
|
---|
505 | else
|
---|
506 | { signal(signals[i], termination_in_progress); }
|
---|
507 | }
|
---|
508 | }
|
---|
509 |
|
---|
510 |
|
---|
511 |
|
---|
512 | /*-----------------------------------------------------------*/
|
---|
513 |
|
---|
514 |
|
---|
515 |
|
---|
516 | void termination_in_progress(int sig)
|
---|
517 | {
|
---|
518 | log_it(debug, "Termination in progress");
|
---|
519 | usleep(1000);
|
---|
520 | pthread_exit(NULL);
|
---|
521 | }
|
---|
522 |
|
---|
523 |
|
---|
524 |
|
---|
525 | /*-----------------------------------------------------------*/
|
---|
526 |
|
---|
527 |
|
---|
528 |
|
---|
529 | char *tmsg_to_string(t_msg msg_type)
|
---|
530 | /*
|
---|
531 | Purpose:turn msg_type struct variable into a string
|
---|
532 | Params: msg_type - type of message
|
---|
533 | Return: pointer to static string containing text version of msg_type
|
---|
534 | */
|
---|
535 | {
|
---|
536 | static char sz_msg[MAX_STR_LEN];
|
---|
537 | switch(msg_type)
|
---|
538 | {
|
---|
539 | case unused : strcpy(sz_msg, "unused"); break;
|
---|
540 | case login : strcpy(sz_msg, "login"); break;
|
---|
541 | case logout : strcpy(sz_msg, "logout"); break;
|
---|
542 | case login_ok:strcpy(sz_msg, "login_ok"); break;
|
---|
543 | case logout_ok:strcpy(sz_msg, "logout_ok"); break;
|
---|
544 | case ping : strcpy(sz_msg, "ping"); break;
|
---|
545 | case pong : strcpy(sz_msg, "pong"); break;
|
---|
546 | case login_fail : strcpy(sz_msg, "login_fail"); break;
|
---|
547 | case logout_fail: strcpy(sz_msg, "logout_fail"); break;
|
---|
548 | case trigger_backup: strcpy(sz_msg, "trigger_backup"); break;
|
---|
549 | case trigger_compare:strcpy(sz_msg, "trigger_compare"); break;
|
---|
550 | case trigger_restore:strcpy(sz_msg, "trigger_restore"); break;
|
---|
551 | case begin_stream: strcpy(sz_msg, "begin_stream"); break;
|
---|
552 | case end_stream: strcpy(sz_msg, "end_stream"); break;
|
---|
553 | case backup_ok: strcpy(sz_msg, "backup_ok"); break;
|
---|
554 | case backup_fail: strcpy(sz_msg, "backup_fail"); break;
|
---|
555 | case compare_ok: strcpy(sz_msg, "compare_ok"); break;
|
---|
556 | case compare_fail: strcpy(sz_msg, "compare_fail"); break;
|
---|
557 | case restore_ok: strcpy(sz_msg, "restore_ok"); break;
|
---|
558 | case restore_fail: strcpy(sz_msg, "restore_fail"); break;
|
---|
559 | case user_req: strcpy(sz_msg, "user_req"); break;
|
---|
560 | case progress_rpt: strcpy(sz_msg, "progress_rpt"); break;
|
---|
561 | default: strcpy(sz_msg, "(Fix tmsg_to_string please)"); break;
|
---|
562 | }
|
---|
563 | return(sz_msg);
|
---|
564 | }
|
---|
565 |
|
---|
566 |
|
---|
567 |
|
---|
568 | /*-----------------------------------------------------------*/
|
---|
569 |
|
---|
570 |
|
---|
571 |
|
---|
572 | int transmit_file_to_socket(FILE*fin, int socket_fd)
|
---|
573 | /*
|
---|
574 | Purpose:Transmit file to socket, from disk / stream.
|
---|
575 | Params: socket_fd - file descriptor of socket
|
---|
576 | fin - file descriptor of input file
|
---|
577 | Return: result (0=success, nonzero=failure)
|
---|
578 | NB: socket_fd was created with open() but
|
---|
579 | fopen was created with fopen(). Different, see? Nyah.
|
---|
580 | */
|
---|
581 | {
|
---|
582 | char tmp[MAX_STR_LEN+1], buf[XFER_BUF_SIZE];
|
---|
583 | int length, retval=0, rotor=0;
|
---|
584 | bool done;
|
---|
585 |
|
---|
586 | signal(SIGPIPE, SIG_IGN);
|
---|
587 | for(done=false; !done; )
|
---|
588 | {
|
---|
589 | if (feof(fin))
|
---|
590 | {
|
---|
591 | log_it(debug, "eof(fin) - OK, stopped reading from mondoarchive");
|
---|
592 | done=true;
|
---|
593 | continue;
|
---|
594 | }
|
---|
595 | // log_it(debug, "Reading from mondoarchive");
|
---|
596 | length = fread(buf, 1, XFER_BUF_SIZE, fin); /* read from fifo (i.e. mondoarchive) */
|
---|
597 | // sprintf(tmp, "%d bytes read from mondoarchive", length); log_it(debug, tmp);
|
---|
598 | if (length > 0)
|
---|
599 | {
|
---|
600 | tmp[0] = (char)(rotor=(rotor%127)+1);
|
---|
601 | tmp[1] = (char)(length / 256);
|
---|
602 | tmp[2] = (char)(length % 256);
|
---|
603 | if (write(socket_fd, tmp, 3)!=3) { log_it(debug, "Failed to write rotor and block_len to socket"); retval++; done=true; continue; }
|
---|
604 | // else { log_it(debug, "rotor and block_len written to socket"); }
|
---|
605 | if (write(socket_fd, buf, length)!=length) { log_it(debug, "Failed to write block read from mondoarchive to socket"); retval++; done=true; continue; }
|
---|
606 | else
|
---|
607 | {
|
---|
608 | sprintf(tmp, "Block #%d (%d bytes) written to socket", rotor, length);
|
---|
609 | // log_it(debug, tmp);
|
---|
610 | }
|
---|
611 | }
|
---|
612 | else if (length < 0)
|
---|
613 | { log_it(warn, "I had trouble reading from FIFO while calling mondoarchive"); }
|
---|
614 | }
|
---|
615 | if (retval==0)
|
---|
616 | {
|
---|
617 | // log_it(debug, "Writing final rotor (the 'end of stream' one) to socket");
|
---|
618 | tmp[0]=0;
|
---|
619 | tmp[1]=0x7B;
|
---|
620 | tmp[2]=0x21;
|
---|
621 | if (write(socket_fd, tmp, 3)!=3) { log_it(debug, "Failed to write end-of-stream rotor to socket"); retval++; }
|
---|
622 | }
|
---|
623 | log_it(debug, "Closed fopen() to tempdev");
|
---|
624 | // fclose(fin);
|
---|
625 | signal(SIGPIPE, terminate_daemon);
|
---|
626 | return(retval);
|
---|
627 | }
|
---|
628 |
|
---|
629 |
|
---|
630 |
|
---|
631 | /*-----------------------------------------------------------*/
|
---|
632 |
|
---|
633 |
|
---|
634 | /*
|
---|
635 | Purpose: strip directory from filenames
|
---|
636 | Params: path like: "dir1/dir2/file"
|
---|
637 | Return: result pointer to the first character behind the last '/'
|
---|
638 | */
|
---|
639 | char *my_basename(char *path)
|
---|
640 | {
|
---|
641 | char *name;
|
---|
642 | if (path == NULL)
|
---|
643 | return (NULL);
|
---|
644 | name = strrchr(path, '/');
|
---|
645 | if (name == NULL)
|
---|
646 | return (path); /* only a filename was given */
|
---|
647 | else
|
---|
648 | return (++name); /* skip the '/' and return pointer to next char */
|
---|
649 | }
|
---|
650 |
|
---|
651 |
|
---|
652 |
|
---|
653 |
|
---|
654 | /*-----------------------------------------------------------*/
|
---|
655 |
|
---|
656 |
|
---|
657 | /*
|
---|
658 | Purpose: analyse command line arguments and write them to global struct
|
---|
659 | Params: argc number of arguments
|
---|
660 | argv arguments as array of strings
|
---|
661 | Return: result (0=success, nonzero=failure)
|
---|
662 | */
|
---|
663 | int parse_options(int argc, char *argv[])
|
---|
664 | {
|
---|
665 | // initialize the global data structure
|
---|
666 | memset( g, 0, sizeof(struct s_globaldata));
|
---|
667 |
|
---|
668 | // we use malloc() here for default strings, as we wanna use free() later
|
---|
669 | // when changing the value. free()ing mem in the text segment would be a
|
---|
670 | // bad idea...
|
---|
671 |
|
---|
672 | /* Initialize default values */
|
---|
673 | #define INIT_DEFAULT_STRING(var, string) \
|
---|
674 | if ( ((var) = (char*) malloc(strlen(string)+1)) != NULL ) \
|
---|
675 | strcpy((var), string)
|
---|
676 |
|
---|
677 | INIT_DEFAULT_STRING( g->client_rcfile, CLIENT_RCFILE );
|
---|
678 | INIT_DEFAULT_STRING( g->client_comdev, CLIENT_COMDEV );
|
---|
679 | INIT_DEFAULT_STRING( g->server_comdev, SERVER_COMDEV );
|
---|
680 | INIT_DEFAULT_STRING( g->server_status_file, SERVER_STATUS_FILE );
|
---|
681 |
|
---|
682 | g->loglevel = LOG_THESE_AND_HIGHER; // log messages with level >= loglevel to logfile
|
---|
683 |
|
---|
684 | // evaluate if we're server or client:
|
---|
685 | // We decide it by looking at the name of the running program
|
---|
686 | if (strstr(my_basename(argv[0]), "server") != NULL)
|
---|
687 | { // the server may be named 'server', 'monitos-server', 'monserver_start', ...
|
---|
688 | INIT_DEFAULT_STRING( g->logfile, SERVER_LOGFILE );
|
---|
689 | }
|
---|
690 | else if (strstr(my_basename(argv[0]), "client") != NULL)
|
---|
691 | { // the client may be named 'client', 'monitos-client', 'monclient_start', ...
|
---|
692 | INIT_DEFAULT_STRING( g->logfile, CLIENT_LOGFILE );
|
---|
693 | }
|
---|
694 | else /* this should never happen */
|
---|
695 | {
|
---|
696 | fprintf(stderr, "Don't know if we're running as server or client, when started as %s", my_basename(argv[0]));
|
---|
697 | INIT_DEFAULT_STRING( g->logfile, "/var/log/monitas.log" );
|
---|
698 | }
|
---|
699 |
|
---|
700 | #undef INIT_DEFAULT_STRING
|
---|
701 | return 0;
|
---|
702 | }
|
---|
703 |
|
---|
704 |
|
---|
705 |
|
---|
706 |
|
---|
707 |
|
---|
708 |
|
---|
709 |
|
---|