added debugging and bug on pid suppression corrected
This commit is contained in:
Daniel Tartavel
parent
18d7e878cf
commit
0bb0c7885e
228
main.c
228
main.c
@ -9,16 +9,15 @@
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#include <locale.h>
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#include <libgen.h>
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#include <sys/inotify.h>
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#include <errno.h>
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#define HOSTNAME "localhost"
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#define EVENT_SIZE (sizeof(struct inotify_event))
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#define NONE 0
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#define INFO 1
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#define WARNING 2
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#define WARNING 1
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#define INFO 2
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#define DEBUG 3
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int debug = INFO;
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struct connexion
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{
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int pid;
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@ -46,7 +45,50 @@ struct notify_config
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int wd;
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};
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struct config cfg = {"","","",""};
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int loglevel = DEBUG;
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// return date in localized format
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char * frtime(const time_t timet)
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{
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struct tm *date_tm;
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static char result[40];
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date_tm = localtime(&timet);
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strftime(result, 40, "%c", date_tm);
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return result;
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}
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int printlog(char str[], int level, int errnum)
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{
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FILE * fh = NULL;
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time_t now = 0;
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char tmp[128];
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int retval = EXIT_SUCCESS;
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if ( level <= loglevel )
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{
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if (errnum != 0)
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{
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sprintf( tmp, "%s: %s %s\n", frtime(now), str, strerror(errnum));
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}else
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{
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sprintf( tmp, "%s: %s\n", frtime(now), str);
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}
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if ( (fh = fopen(cfg.logfile, "a")) == NULL)
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{
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perror(cfg.logfile);
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retval = EXIT_FAILURE;
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}
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if ( retval == EXIT_SUCCESS )
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{
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fprintf(fh, "%s", tmp);
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fclose(fh);
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}
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printf("%s", tmp);
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}
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return retval;
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}
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int explode( char * str, char * separator, size_t m, size_t n, char exploded[m][n] )
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{
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@ -56,7 +98,7 @@ int explode( char * str, char * separator, size_t m, size_t n, char exploded[m][
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pch = strtok( str, separator );
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while( pch != NULL )
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{
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if (debug >= 2) printf("%s\n", pch);
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printlog( pch, DEBUG, 0);
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strcpy( exploded[x++], pch) ;
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pch = strtok( NULL , separator );
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}
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@ -72,6 +114,7 @@ int readconfig( struct config * cfg )
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int x;
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int retval=0;
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char str[1024];
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char strlog[128];
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char exploded[2][1024];
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char * homepath;
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char * buff;
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@ -87,12 +130,13 @@ int readconfig( struct config * cfg )
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{
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if ((fh = fopen( path[x], "r")) == NULL)
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{
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if (debug >= 1) perror(path[x]);
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printlog( path[x], WARNING, errno );
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retval = -1;
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}else
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{
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strcpy( cfg->configfile, path[x]);
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if (debug >= 1) printf("Found config file: %s\n", path[x]);
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sprintf(strlog, "Found config file: %s\n", path[x]);
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printlog( strlog, WARNING, 0);
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x = 3;
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retval = 0;
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}
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@ -107,24 +151,27 @@ int readconfig( struct config * cfg )
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if ( (fh1 = fopen(exploded[1],"r")) != NULL)
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{
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strcpy( cfg->commande, exploded[1] );
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if (debug >= 1) printf("Found command: %s\n", cfg->commande);
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sprintf(strlog, "Found command: %s", cfg->commande);
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printlog(strlog, INFO, 0);
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fclose(fh1);
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}else
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{
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if (debug >= 1) perror(exploded[1]);
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printlog( exploded[1], INFO, errno);
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}
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}else if( strcmp( exploded[0], "logfile") == 0)
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{
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if ( (fh1 = fopen(exploded[1], "a")) != NULL )
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{
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strcpy( cfg->logfile, exploded[1] );
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if (debug >= 1) printf("Found logfile: %s\n", cfg->logfile);
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sprintf( strlog, "Found logfile: %s", cfg->logfile);
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printlog(strlog, INFO, 0);
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fclose(fh1);
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}
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}else if( strcmp( exploded[0], "hostname") == 0 )
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{
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strcpy( cfg->hostname, exploded[1] );
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if (debug >= 1 ) printf("Found hostname: %s\n", cfg->hostname);
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sprintf(strlog, "Found hostname: %s", cfg->hostname);
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printlog(strlog, INFO, 0);
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}
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}
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}
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@ -140,7 +187,7 @@ int readconfig( struct config * cfg )
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fclose(fh1);
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}else
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{
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if (debug >= 1) perror(logfilepath);
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printlog( logfilepath, WARNING, errno);
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strcpy(cfg->logfile, "/dev/null");
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retval += 2;
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}
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@ -171,51 +218,48 @@ int readconfig( struct config * cfg )
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int isinarray( int pid, int array[], int n )
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{
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int x;
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char strlog[128];
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for(x=1;x<=n;x++)
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{
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if( pid == array[x])
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{
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if (loglevel >= DEBUG )
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{
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sprintf(strlog, "pid %i is in array", pid);
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printlog(strlog, DEBUG, 0 );
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}
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return x;
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}
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}
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return 0;
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}
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// return date in localized format
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char* frtime(const time_t timet)
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{
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struct tm *date_tm;
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static char result[40];
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date_tm = localtime(&timet);
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strftime(result, 40, "%c", date_tm);
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return result;
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}
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// initialize config file watching
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int init_config_watch( char config_file[], struct notify_config * ncc )
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{
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ncc->fd = inotify_init();
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if ( ncc->fd < 0 )
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{
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perror( "inotify_init" );
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printlog("inotify_init", WARNING, errno );
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return -1;
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}
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ncc->wd = inotify_add_watch( ncc->fd, config_file, IN_MODIFY | IN_DELETE );
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if (ncc->wd == -1)
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{
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perror(config_file);
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printf("%s\n", config_file);
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printlog(config_file, WARNING, errno);
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return -2;
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}
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return 0;
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}
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int notify_config_change(struct notify_config * ncc, char config_file[], struct config * cfg)
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int notify_config_change(struct notify_config * ncc, char config_file[])
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{
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int length=0;
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int i=0;
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int buff_length = (1024 * (EVENT_SIZE + 16));
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char buff[buff_length];
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char strlog[128];
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fd_set rfds;
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struct timeval tv = {1,0};
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int retval;
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@ -225,14 +269,14 @@ int notify_config_change(struct notify_config * ncc, char config_file[], struct
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retval = select(ncc->fd+1, &rfds, NULL, NULL, &tv);
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if (retval == -1)
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{
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if (debug >= 1) perror("select()");
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printlog("select()", WARNING, errno);
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}
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else if (retval)
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{
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length = read(ncc->fd, buff, buff_length);
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if (length < 0)
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{
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if (debug >= 1) perror("reading");
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printlog("reading", WARNING, errno);
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return -1;
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}
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while (i < length)
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@ -240,12 +284,14 @@ int notify_config_change(struct notify_config * ncc, char config_file[], struct
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struct inotify_event *event = (struct inotify_event *) &buff[i];
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if (event->mask & IN_DELETE)
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{
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if (debug >= 2) printf("The file %s was deleted.\n", event->name);
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sprintf(strlog, "The file %s was deleted.", event->name);
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printlog(strlog, INFO, 0);
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init_config_watch( config_file, ncc);
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} else if (event->mask & IN_MODIFY)
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{
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if (debug >= 2) printf("The file %s was modified.\n", event->name);
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readconfig(cfg);
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sprintf(strlog, "The file %s was modified.", event->name);
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printlog(strlog, INFO, 0);
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readconfig(&cfg);
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}
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i += EVENT_SIZE + event->len;
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}
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@ -261,6 +307,7 @@ void getutmp( struct connexion * conn, time_t * time )
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int ipv4;
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int x;
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char str[6];
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char strlog[128];
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conn->host_ip[0]='\0';
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conn->host_ipv6[0]='\0';
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@ -270,8 +317,10 @@ void getutmp( struct connexion * conn, time_t * time )
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if ( utmp->ut_pid == conn->pid )
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{
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sprintf(conn->user, "%s", utmp->ut_user); //got user login
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printlog(conn->user, DEBUG, 0);
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sprintf(conn->hostname, "%s", utmp->ut_host); //got ip of origin
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if((utmp->ut_addr_v6[1] && utmp->ut_addr_v6[2] && utmp->ut_addr_v6[3]) == 0)
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printlog(conn->hostname, DEBUG, 0);
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if((utmp->ut_addr_v6[1] || utmp->ut_addr_v6[2] || utmp->ut_addr_v6[3]) == 0)
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{
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ipv4 = utmp->ut_addr_v6[0] & 0x00000000000000ff;
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sprintf( str, "%d.", ipv4);
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@ -285,6 +334,7 @@ void getutmp( struct connexion * conn, time_t * time )
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ipv4 = (utmp->ut_addr_v6[0] & 0x00000000ff000000) >> 24;
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sprintf( str, "%d", ipv4);
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strcat(conn->host_ip, str);
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printlog(conn->host_ip, DEBUG, 0);
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}else
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{
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for (x=0;x<4;x++)
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@ -303,8 +353,10 @@ void getutmp( struct connexion * conn, time_t * time )
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strcat(conn->host_ipv6, str);
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}
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conn->host_ipv6[strlen(conn->host_ipv6)-1] = '\0';
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printlog(conn->host_ipv6, DEBUG, 0);
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}
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*time = (time_t) utmp->ut_tv.tv_sec; //got connexion time
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sprintf(strlog, "heure de connexion - %s", frtime( *time ) );
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break;
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}
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}
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@ -342,14 +394,16 @@ int getpids(int pid, int exploded[])
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char * pch;
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char path[1024];
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char str[4096];
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char strlog[128];
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char separator[] = " ";
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int x = 0;
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sprintf( path, "/proc/%d/task/%d/children", pid, pid);
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if (debug >= 2) printf("process path: %s\n", path);
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sprintf(strlog, "process path: %s", path);
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printlog(strlog, DEBUG,0);
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if ((fh = fopen( path, "r")) == NULL)
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{
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if (debug >= 1) perror(path);
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printlog(path, WARNING, errno);
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return -1;
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}
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if ( fgets( str, 40, fh ) != NULL )
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@ -357,7 +411,7 @@ int getpids(int pid, int exploded[])
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pch = strtok( str, separator );
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while( pch != NULL )
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{
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if (debug >= 2) printf("%s\n", pch);
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printlog(pch, DEBUG, 0);
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exploded[x++] = atoi( pch );
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pch = strtok( NULL , separator );
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}
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@ -370,6 +424,7 @@ int getpids(int pid, int exploded[])
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}
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}
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// get informations on processus
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int getprocinfo( struct connexion * conn )
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{
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FILE *fh1;
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@ -380,7 +435,7 @@ int getprocinfo( struct connexion * conn )
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int r;
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int level = 0;
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int retval = 0;
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char tab[128];
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//char tab[128];
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time_t timet=0;
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//get connexion time
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@ -398,7 +453,7 @@ int getprocinfo( struct connexion * conn )
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if ( r != -1 )
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{
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level++;
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strcat(tab," ");
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//strcat(tab," ");
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conn->pid = child_pid[0];
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}else
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{
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@ -410,22 +465,24 @@ int getprocinfo( struct connexion * conn )
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sprintf( child_path, "/proc/%d/cmdline", conn->pid );
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if ( (fh1 = fopen( child_path, "r" )) == NULL)
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{
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if (debug >= 1) perror(child_path);
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printlog(child_path, WARNING, errno);
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return 2;
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}
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fgets( str, 1024, fh1);
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null2space( str );
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sprintf(conn->cmdline, "%s", str);
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fclose(fh1);
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printlog(conn->cmdline, DEBUG, 0);
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if ((strstr(conn->cmdline, "pam") || strstr(conn->cmdline, "net") || strstr(conn->cmdline, "accepted")) != 0)
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{
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printlog("comdline is pam or net or accepted", DEBUG, 0);
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retval = -1;
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}
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// get the command name
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sprintf( child_path, "/proc/%d/comm", conn->pid );
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if ( (fh1= fopen(child_path, "r" )) == NULL)
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{
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if (debug >= 1) perror(child_path);
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printlog(child_path, WARNING, errno);
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return 3;
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}
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fscanf( fh1, "%s", conn->cmd );
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@ -441,12 +498,12 @@ int main()
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int n_ssh=10;
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int id;
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int pid;
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int x=0;
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int y=0;
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int r=0;
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int i;
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int j;
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int n;
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int n_pid=0;
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int start=1;
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int childrens[n_ssh];
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int pids[n_ssh];
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@ -458,10 +515,11 @@ int main()
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char date[60];
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time_t now = 0;
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char * language;
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char strlog[128];
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// char * buff;
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struct connexion conn;
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struct connexion connexions[n_ssh];
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struct config cfg = {"","","",""};
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struct notify_config ncc;
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//char * ptr;
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@ -480,13 +538,7 @@ int main()
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time( &now );
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sprintf( date, "%s", frtime(now));
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if ( (fh = fopen(cfg.logfile, "a")) == NULL)
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{
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if (debug >= 1) perror(cfg.logfile);
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return 7;
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}
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fprintf(fh, "%s: Démarrage de sshdetect\n", date);
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fclose(fh);
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printlog("Démarrage de sshdetect", INFO, 0);
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sprintf( str, "%s \"%s - %s: Démarrage de sshdetect\"", cfg.commande, cfg.hostname, date );
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id=fork();
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if(id == 0)
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@ -496,30 +548,32 @@ int main()
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r = system( str );
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}else
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{
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if (debug >= 2) printf("no command defined: no command launched\n");
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printlog("no command defined: no command launched", WARNING, 0);
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}
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exit(r);
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}else if( id<0 )
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{
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if (debug >= 1) printf("erreur de création du fork: %s\n", str);
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sprintf(strlog, "erreur de création du fork: %s", str);
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printlog(strlog, WARNING, 0);
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}
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init_config_watch( cfg.configfile, &ncc);
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while (1)
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{
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memset(&conn, 0, sizeof(conn));
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// get the sshd process ID (PID)
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if ( (fh = fopen("/run/sshd.pid", "r" )) == NULL)
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{
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if (debug >= 1) perror("/run/sshd.pid");
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printlog("/run/sshd.pid", WARNING, errno);
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return 1;
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}
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if ( fscanf(fh, "%i", &pid) == 0)
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{
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if (debug >= 1) printf("erreur fscanf: /run/sshd.pid\n" );
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printlog("erreur fscanf: /run/sshd.pid", WARNING, 0 );
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return 10;
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}
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fclose(fh);
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if (debug >= 1) printf("%i", pid);
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sprintf(strlog, "%i", pid);
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printlog(strlog, DEBUG, 0);
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//get the list of children
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if ( (n=getpids( pid, pids )) != -1)
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@ -527,7 +581,9 @@ int main()
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for ( y=0; y<n; y++)
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{
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pid = pids[y];
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r = isinarray(pid, childrens, x);
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sprintf( strlog, "pid %i", pid);
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printlog(strlog, DEBUG, 0);
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r = isinarray(pid, childrens, n_pid);
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if( r == 0 )
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{
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conn.user[0]='\0';
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@ -542,94 +598,82 @@ int main()
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{
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strcpy(ip,conn.host_ipv6);
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}
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x++;
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childrens[x] = pid;
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flag[x] = 1;
|
||||
connexions[x] = conn;
|
||||
n_pid++;
|
||||
childrens[n_pid] = pid;
|
||||
flag[n_pid] = 1;
|
||||
connexions[n_pid] = conn;
|
||||
// date of connexion
|
||||
if (conn.user[0] == '\0')
|
||||
{
|
||||
sprintf( str, "%s \"%s: tunnel ouvert le %s depuis %s pid: %d avec la commande: %s %s\"", cfg.commande, cfg.hostname, conn.date, ip, conn.pid, conn.cmd, conn.cmdline );
|
||||
sprintf( str, "%s: %s \"%s: tunnel ouvert depuis %s pid: %d avec la commande: %s %s\"", conn.date, cfg.commande, cfg.hostname, ip, conn.pid, conn.cmd, conn.cmdline );
|
||||
}else
|
||||
{
|
||||
sprintf( str, "%s \"%s: %s s'est connecté le %s depuis %s pid: %d avec la commande: %s %s\"", cfg.commande, cfg.hostname, conn.user, conn.date,ip, conn.pid, conn.cmd, conn.cmdline );
|
||||
sprintf( str, "%s: %s \"%s: %s s'est connecté depuis %s pid: %d avec la commande: %s %s\"", conn.date, cfg.commande, cfg.hostname, conn.user, ip, conn.pid, conn.cmd, conn.cmdline );
|
||||
}
|
||||
if ( start != 1 )
|
||||
{
|
||||
id=fork();
|
||||
if(id > 0)
|
||||
{
|
||||
if ( (fh1 = fopen(cfg.logfile, "a")) == NULL)
|
||||
{
|
||||
if (debug >= 1) perror(cfg.logfile);
|
||||
return 7;
|
||||
}
|
||||
fprintf(fh1, "%s: Connexion de %s depuis %s commande: %s %s\n", conn.date, conn.user, ip, conn.cmd, conn.cmdline);
|
||||
fclose(fh1);
|
||||
sprintf(strlog, "%s: Connexion de %s depuis %s commande: %s %s", conn.date, conn.user, ip, conn.cmd, conn.cmdline);
|
||||
}else if (id < 0)
|
||||
{
|
||||
if (debug >= 1) printf("erreur de création du fork: %s\n", str);
|
||||
sprintf(strlog, "erreur de création du fork: %s", str);
|
||||
printlog(strlog, WARNING, 0);
|
||||
}else
|
||||
{
|
||||
if (cfg.commande[0] != 0)
|
||||
{
|
||||
if (debug >= 1) printf("%s\n", str);
|
||||
printlog(str, INFO, 0);
|
||||
r = system( str );
|
||||
}else
|
||||
{
|
||||
if (debug >= 1) printf("no command defined: no command launched\n");
|
||||
printlog("no command defined: no command launched", WARNING, 0);
|
||||
}
|
||||
exit(r);
|
||||
}
|
||||
}else
|
||||
{
|
||||
if ( (fh1 = fopen(cfg.logfile, "a")) == NULL)
|
||||
{
|
||||
if (debug >= 1) perror(cfg.logfile);
|
||||
return 7;
|
||||
}
|
||||
fprintf(fh1, "%s: %s Connecté depuis %s - %s %s\n", conn.date, conn.user, ip, conn.cmd, conn.cmdline);
|
||||
fclose(fh1);
|
||||
sprintf(strlog, "%s: %s Connecté depuis %s - %s %s\n", conn.date, conn.user, ip, conn.cmd, conn.cmdline);
|
||||
printlog(strlog, INFO, 0);
|
||||
}
|
||||
}else if (rinfo == -1)
|
||||
{
|
||||
|
||||
if (debug >= 2) printf("%i => 2 pids : en cours de connexion\n", conn.pid);
|
||||
sprintf(strlog, "%i => 2 pids : en cours de connexion\n", conn.pid);
|
||||
printlog(strlog, INFO, 0);
|
||||
}
|
||||
}else
|
||||
{
|
||||
flag[r] = 1;
|
||||
}
|
||||
}
|
||||
for(i=1;i<=x;i++)
|
||||
}
|
||||
for(i=1;i<=n_pid;i++)
|
||||
{
|
||||
if (flag[i] == 0 )
|
||||
{
|
||||
time( &now );
|
||||
sprintf( date, "%s", frtime(now) );
|
||||
if (debug >= 2) printf( "Session %d de %s terminée le %s\n", connexions[i].pid, connexions[i].user, date );
|
||||
if ( (fh1 = fopen(cfg.logfile, "a")) == NULL)
|
||||
{
|
||||
if (debug >= 1) perror(cfg.logfile);
|
||||
return 7;
|
||||
}
|
||||
fprintf(fh1, "%s: pid %d -Connexion de %s terminée le %s\n", cfg.hostname, connexions[i].pid, connexions[i].user, connexions[i].date);
|
||||
for( j=i; j<x; j++ )
|
||||
sprintf(strlog, "%s: Session %d de %s terminée\n", date, connexions[i].pid, connexions[i].user );
|
||||
printlog(strlog, INFO, 0);
|
||||
sprintf(strlog, "%s: %s - pid %d - Connexion de %s terminée", connexions[i].date, cfg.hostname, connexions[i].pid, connexions[i].user);
|
||||
printlog(strlog, INFO, 0);
|
||||
for( j=i; j<n_pid; j++ )
|
||||
{
|
||||
childrens[j] = childrens[j+1];
|
||||
flag[j] = flag[j+1];
|
||||
}
|
||||
i--;
|
||||
x--;
|
||||
n_pid--;
|
||||
}else
|
||||
{
|
||||
flag[i] = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
waitpid(-1, &status ,WNOHANG);
|
||||
// sleep(1);
|
||||
notify_config_change(&ncc, cfg.configfile, &cfg);
|
||||
notify_config_change(&ncc, cfg.configfile);
|
||||
start = 0;
|
||||
}
|
||||
return 0;
|
||||
|
||||
Reference in New Issue
Block a user