Linux文件编程综合（创建打开等）

来源：互联网发布：dede模板下载站源码编辑：程序博客网时间：2024/06/15 09:56
include<sys/types.h>#include<sys/stat.h>#include<fcntl.h>#include<unistd.h>#include<stdio.h>#include<string.h>#include<stdlib.h>#include<errno.h>#define FLAGS O_RDWR#define MODE S_IRUSR|S_IWUSR|S_IXUSR//创建文件函数void write_creat(){const char *pathname;char pn1[20];int fd1;printf("input:");gets(pn1);pathname=pn1;if((fd1=creat(pathname,MODE))==-1){printf("error!\n");exit(1);}printf("OK!\n");printf("fd1=%d\n",fd1);return fd1;}//打开函数void write_open(){const char *pathname;char pn2[20];int fd2;printf("input:");gets(pn2);pathname=pn2;if((fd2=open(pathname,FLAGS,MODE))==-1){printf("error!\n");exit(1);}printf("OK!\n");printf("fd2=%d\n",fd2);return fd2;}//关闭函数void write_close(){const char *pathname;int fd3;char pn3[20];printf("input:");gets(pn3);pathname=pn3;if((fd3=close(pn3))==-1){printf("error!\n");exit(1);}printf("OK!\n");printf("fd3=%d\n",fd3);return fd3;}//读文件函数void write_read(){int fd4;const char *pathname;int count;int SIZE;char read_buf[SIZE];char pn4[20];printf("input:");gets(pn4);pathname=pn4;if((fd4=open(pathname,FLAGS,MODE))==-1){printf("error!\n");exit(1);}printf("OK!\n");printf("began!\n");printf("input size:");gets(SIZE);count=strlen(read_buf);if((fd4=read(fd4,read_buf,count))==-1){printf("error!\n");exit(1);}printf("OK!\n");printf("fd4=%d\n",fd4);return fd4;}//写函数void write_write(){int fd5;const char *pathname;int count;int SIZE;char write_buf[SIZE];char pn5[20];printf("input:");gets(pn5);pathname=pn5;if((fd5=open(pathname,FLAGS,MODE))==-1){printf("error!\n");exit(1);}printf("OK!\n");printf("began!\n");printf("input size:");gets(SIZE);count=strlen(write_buf);if((fd5=write(fd5,write_buf,count))==-1){printf("error!\n");exit(1);}}printf("OK!\n");printf("fd5=%d\n",fd5);return fd5;}//主函数void main(){write_creat();write_open();write_close();write_read();write_write();printf("done!!!");}
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