how to read or write the picture and sound file in unix

sgs

sorry:
   i want to read or write the picture and sound file in unix,for example the '.jpeg' file.
   this my done:
.....
   int fd1=open("/load/picture1.jpg",O_RDONLY);
.....
  
    but fd1 is -1,why?
    thanks!!

seeLnd

Hi,
I suggest checking the return value of open(),
if it isn't 0, output the error message.
Try call the function [void perror(const char *s)] and it will tell you the reason why.

Like this:

if (fd1 < 0)
   perror("open";

mike_chen

核对一下文件的位置和权限,如果没问题,最好象楼主说的那样用perror打印出出错信息.

sgs

thanks!
    now is ok,i find i make a mistake,the file name is picuture1.jpg not picture1.jpg!
    thanks!

sgs

seeLand and mike_chen:
   thanks very much!you are very friendly!i make a simple and fool mistake!