Attachment 1216 Details for Bug 2697 – This is sample program,

This is sample program,

cifscrash.cpp (text/plain), 1.83 KB, created by Ilya A. Volynets on 2005-05-10 15:11:44 UTC

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Creator: Ilya A. Volynets

Created: 2005-05-10 15:11:44 UTC

Size: 1.83 KB

patch

obsolete

>#include <iostream>
>#include <fcntl.h>
>#include <sys/types.h>
>#include <dirent.h>
>#include <stdio.h>
>#include <sys/file.h>
>
>int try_lock(const char* path,const char* name)
>{
>    struct flock fl;
>    fl.l_type=F_RDLCK;
>    fl.l_whence=SEEK_SET;
>    fl.l_start=0;
>    fl.l_len=1;
>    std::string p(path);
>    p+=name;
>    int fd=open(p.c_str(),O_RDONLY);
>    if(fd<0) {
>	std::cerr<<"Error opening file: "<<p<<": "<<strerror(errno)<<std::endl;
>	return -1;
>    }
>    //if(fcntl(fd,F_SETLK,&fl)<0){
>    if(flock(fd,LOCK_EX|LOCK_NB)<0){
>	std::cerr<<"Error locking file: "<<p<<": "<<strerror(errno)<<std::endl;
>	close(fd);
>	return -1;
>    }
>    return fd;
>}
>void unlock(int fd)
>{
>    struct flock fl;
>    fl.l_type=F_UNLCK;
>    fl.l_whence=SEEK_SET;
>    fl.l_start=0;
>    fl.l_len=1;
>    //fcntl(fd,F_SETLK,&fl);
>    flock(fd,LOCK_UN);
>    close(fd);
>}
>
>int main(int arg, char** argv)
>{
>    const char *path=argv[1];
>    char name[20];
>    while(true)
>    {
>	std::cout<<"Openning dir "<<path<<std::endl;
>	DIR* d=opendir(path);
>	if(!d)
>	    std::cout<<"Error openning "<<path<<": "<<strerror(errno)<<std::endl;
>	else
>	    std::cout<<"Open dir "<<path<<"\n";
>	struct dirent *de;
>	while(true){
>	    de=readdir(d);
>	    if(!de){
>		//std::cout<<"Error reading "<<path<<": "<<strerror(errno)<<std::endl;
>		break;
>	    } else {
>		std::cout<<"Got dentry: "<<de->d_name<<std::endl;
>	    }
>	    if(de->d_name[0]=='.')
>		continue;
>	    strcpy(name,de->d_name);
>	    int fd=try_lock(path,name);
>	    if(fd>=0){
>		std::cout<<"Locked "<<path<<name<<std::endl;
>		if(strlen(de->d_name)>=sizeof(name)-1)
>		    strcpy(name,"1");
>		else
>		    strncat(name,"1",sizeof(name)-1);
>		if(rename(de->d_name,name)<0)
>		    std::cout<<"Error renaming: "<<strerror(errno)<<std::endl;
>		unlock(fd);
>	    } else {
>		std::cout<<"Couldn't lock "<<path<<name<<std::endl;
>	    }
>	}
>	closedir(d);
>    }
>    return 0;
>}
>

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Attachments on bug 2697: 1216