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我遇到了一些问题，并且找不到解决方案：/我需要在我的保险丝文件系统中打开文本文件。在调试一切正常，但在发布系统崩溃。我用这个做了一个简单的例子。有人可以告诉这个代码有什么问题吗？FUSE文件系统在打开文件时崩溃（仅在发布模式下）
/*
FUSE: Filesystem in Userspace
Copyright (C) 2001-2007 Miklos Szeredi <[email protected]>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
gcc -Wall `pkg-config fuse --cflags --libs` hello.c -o hello
*/
# define FUSE_USE_VERSION 26
#include <fuse.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
void stripnl(char *str) {
while(strlen(str) && ((str[strlen(str) - 1] == 13) ||
(str[strlen(str) - 1] == 10))) {
str[strlen(str) - 1] = 0;
}
}
static const char *hello_str = "Hello World!\n";
static const char *hello_path = "/hello";
static int hello_getattr(const char *path, struct stat *stbuf)
{
int res = 0;
memset(stbuf, 0, sizeof(struct stat));
if (strcmp(path, "/") == 0) {
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 2;
} else if (strcmp(path, hello_path) == 0) {
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
stbuf->st_size = strlen(hello_str);
} else
res = -ENOENT;
return res;
}
static int hello_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
off_t offset, struct fuse_file_info *fi)
{
(void) offset;
(void) fi;
if (strcmp(path, "/") != 0)
return -ENOENT;
filler(buf, ".", NULL, 0);
filler(buf, "..", NULL, 0);
filler(buf, hello_path + 1, NULL, 0);
FILE *infile;
char fname[40];
char line[100];
int lcount;
/* We need to get rid of the newline char. */
stripnl(fname);
/* Open the file. If NULL is returned there was an error */
if((infile = fopen("ex.txt", "r")) == NULL) {
printf("Error Opening File.\n");
}
while(fgets(line, sizeof(line), infile) != NULL) {
/* Get each line from the infile */
lcount++;
/* print the line number and data */
printf("Line %d: %s", lcount, line);
filler(buf, line, NULL, 0);
}
fclose(infile); /* Close the file */
return 0;
}
static int hello_open(const char *path, struct fuse_file_info *fi)
{
if (strcmp(path, hello_path) != 0)
return -ENOENT;
if ((fi->flags & 3) != O_RDONLY)
return -EACCES;
return 0;
}
static int hello_read(const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi)
{
size_t len;
(void) fi;
if(strcmp(path, hello_path) != 0)
return -ENOENT;
len = strlen(hello_str);
if (offset < len) {
if (offset + size > len)
size = len - offset;
memcpy(buf, hello_str + offset, size);
} else
size = 0;
return size;
}
static struct fuse_operations hello_oper = {
.getattr = hello_getattr,
.readdir = hello_readdir,
.open = hello_open,
.read = hello_read,
};
int main(int argc, char *argv[])
{
return fuse_main(argc, argv, &hello_oper, NULL);
}
更新
好吧，我已经找到了解决办法，路径必须是绝对文件路径（不知道是这是正确的句子），但这里是示例代码，这是在发行工作作为以及在调试中：
/*
FUSE: Filesystem in Userspace
Copyright (C) 2001-2007 Miklos Szeredi <[email protected]>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
gcc -Wall `pkg-config fuse --cflags --libs` hello.c -o hello
*/
# define FUSE_USE_VERSION 26
#include <fuse.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
void stripnl(char *str) {
while(strlen(str) && ((str[strlen(str) - 1] == 13) ||
(str[strlen(str) - 1] == 10))) {
str[strlen(str) - 1] = 0;
}
}
static const char *hello_str = "Hello World!\n";
static const char *hello_path = "/hello";
static int hello_getattr(const char *path, struct stat *stbuf)
{
int res = 0;
memset(stbuf, 0, sizeof(struct stat));
if (strcmp(path, "/") == 0) {
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 2;
} else if (strcmp(path, hello_path) == 0) {
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
stbuf->st_size = strlen(hello_str);
} else
res = -ENOENT;
return res;
}
static int hello_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
off_t offset, struct fuse_file_info *fi)
{
(void) offset;
(void) fi;
if (strcmp(path, "/") != 0)
return -ENOENT;
filler(buf, ".", NULL, 0);
filler(buf, "..", NULL, 0);
filler(buf, hello_path + 1, NULL, 0);
FILE *infile;
char line[100];
if((infile = fopen("/root/Desktop/fexamples/ex.txt", "rb")) == NULL)
{
return -1;
}
while(fgets(line, sizeof(line), infile) != NULL)
{
filler(buf, line, NULL, 0);
}
fclose(infile); /* Close the file */
return 0;
}
static int hello_open(const char *path, struct fuse_file_info *fi)
{
if (strcmp(path, hello_path) != 0)
return -ENOENT;
if ((fi->flags & 3) != O_RDONLY)
return -EACCES;
return 0;
}
static int hello_read(const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi)
{
size_t len;
(void) fi;
if(strcmp(path, hello_path) != 0)
return -ENOENT;
len = strlen(hello_str);
if (offset < len) {
if (offset + size > len)
size = len - offset;
memcpy(buf, hello_str + offset, size);
} else
size = 0;
return size;
}
static struct fuse_operations hello_oper = {
.getattr = hello_getattr,
.readdir = hello_readdir,
.open = hello_open,
.read = hello_read,
};
int main(int argc, char *argv[])
{
return fuse_main(argc, argv, &hello_oper, NULL);
}
下次为自己节省一些麻烦，并使用编辑器中的“{}”按钮来设置代码的格式。 – Mat 2011-04-01 10:06:04
好的，对不起，下次我会这样做。 – krzysztof 2011-04-01 10:31:04
你能更具体地了解这次事故吗？给回溯？将它失败的区域拧紧？ – Mat 2011-04-01 11:00:47