如何在Unix下写入包含C语句的完整目录的文件？

本文介绍了如何在Unix下写入包含C语句的完整目录的文件？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

亲爱的： 我正在尝试写一个文件，其中包含完整的目录名和文件名 指定（./outdir/mytestout.txt其中。是当前目录） in C编程语言和Unix下，但是出现了错误的错误 打开文件./outdir /mytestout.txt。以下是代码： #include< stdio.h> int main（无效） { FILE * fp; char fname [30]; char pathname [30]; strcpy（fname，" ./ outdir /mytestout.txt"）; fp = fopen（fname，" w"）; if（fp == NULL） { printf（无法打开文件％s \ n，fname）; } 其他 { fprintf（fp，这只是一个测试）; } fclose（fp）; 返回0; } 我也尝试用.\outdir \ mytestout.txt"，或者，.// outdir // mytestout.txt或，，。\\outdir \ \ mytestout.txt"，甚至，。/ / outdir /// mytestout.txt等等，我还是还是 试图用当前目录指定整个目录。 （点）替换为真实目录名，但都失败了。我在互联网上搜索了 ，只找到一个相关的说明用完整路径指定 文件名，但是如何在 $ b下指定C中的完整路径$ b Unix？ 请帮帮我。 感谢您的帮助。 Hongyu

Dear all: I am trying to write to a file with full directory name and file name specified (./outdir/mytestout.txt where . is the current directory) in C programming language and under Unix, but got errors of Failed to open file ./outdir/mytestout.txt. Below is the code: #include <stdio.h> int main(void) { FILE *fp; char fname[30]; char pathname[30]; strcpy(fname,"./outdir/mytestout.txt"); fp=fopen(fname, "w"); if (fp == NULL) { printf("Failed to open file %s\n", fname); } else { fprintf(fp, "This is just a test only"); } fclose(fp); return 0; } I also try to write filename and directory with ,".\outdir \mytestout.txt", or ,".//outdir//mytestout.txt" or ",".\\outdir\ \mytestout.txt", or even ,".///outdir///mytestout.txt" etc, and I also tried to specify the whole directory with the current directory . (dot) replaced by the real directory name, but all failed. I searched on the internet and only found one relevant that said to specify filename with full path, but how to specify full path in C under Unix? Please help me. Thanks for the help in advance. Hongyu

推荐答案

Hongyu< ho ******* @ yahoowrites： Hongyu <ho*******@yahoowrites: > I我正在尝试写入一个文件，其中包含指定的完整目录名和文件名（./outdir/mytestout.txt，其中。是当前目录） >I am trying to write to a file with full directory name and file namespecified (./outdir/mytestout.txt where . is the current directory)

目录./outdir是否已经存在？ 如果没有，你需要先创建目录 - 使用mkdir（）; 准备被传送到comp.sys.linux.programmer - Chris。

Does the directory ./outdir already exist? If not, you''ll need to create the directory first - use mkdir(); Prepare to be teleported to comp.sys.linux.programmer -- Chris.

On 8月12日，凌晨1点51分，Hongyu< hongyu ... @ yahoowrote： On Aug 12, 1:51 am, Hongyu <hongyu...@yahoowrote: 亲爱的： 我正在尝试写一个文件，其中包含完整的目录名和文件名 指定（./outdir/mytestout.txt其中。是当前目录） in C编程语言和Unix下，但是出现了错误的错误 打开文件./outdir/mytestout 。文本。下面是代码： Dear all: I am trying to write to a file with full directory name and file name specified (./outdir/mytestout.txt where . is the current directory) in C programming language and under Unix, but got errors of Failed to open file ./outdir/mytestout.txt. Below is the code:

然后你想要comp.unix.programmer，而不是comp.lang.c（虽然你的代码 是topical ）

Then you want comp.unix.programmer, not comp.lang.c (though your code is topical)

#include< stdio.h> int main（无效） { FILE * fp; char fname [30]; char pathname [30]; strcpy（fname，" ./ outdir / mytestout.txt"）; fp = fopen（fname，" w"）; if（fp == NULL） { printf（无法打开文件％s \ n，fname）; } 其他 { fprintf（fp，这只是一个测试）; } fclose（fp）; #include <stdio.h> int main(void) { FILE *fp; char fname[30]; char pathname[30]; strcpy(fname,"./outdir/mytestout.txt"); fp=fopen(fname, "w"); if (fp == NULL) { printf("Failed to open file %s\n", fname); } else { fprintf(fp, "This is just a test only"); } fclose(fp);

fclose调用应该在else子句中。 fclose（NULL）不是由ISO C定义的。（不要与free（NULL）混淆，_is_ 定义并且什么都不做）

The fclose call should be in the else clause. fclose(NULL) is not defined by ISO C. (not to be confused with free(NULL) which _is_ defined and does nothing)

> 返回0; } > return 0; }

2008年8月11日22:51，Hongyu写道： On 11 Aug 2008 at 22:51, Hongyu wrote: 我正在尝试写入一个完整目录名和文件名 指定（./outdir/mytestout.txt，其中。是当前目录） C编程语言并在Unix下，但是出现了错误的错误 打开文件./outdir/mytestout.txt。下面是代码： I am trying to write to a file with full directory name and file name specified (./outdir/mytestout.txt where . is the current directory) in C programming language and under Unix, but got errors of Failed to open file ./outdir/mytestout.txt. Below is the code:

猜猜：outdir存在吗？是否正确设置了权限 能够写出你想要写的文件吗？ 无需猜测即可找到...

Guesses: does outdir exist? Are the permissions set correctly for you to be able to write the file you want to write? To find out without guessing...

printf（无法打开文件％s \ n，fname）; printf("Failed to open file %s\n", fname);

....将此行更改为 perror（" fopen"）; 并查看您收到的错误消息。

....change this line to perror("fopen"); and see what error message you get.