Re: writing struct to disk with write()

["Arsalan Zaidi" <arsalan_zaidi@xxxxxxxxxxxxx>]

Forget about this, solved this just a sec ago. It's amazing what a little
sleep can do... I was forgetting the flags in the open.



>
> Hi.
>
> It's nearly 1:30 am and I'm not getting this... When I run this prog,
> perror() tells me write() won't write because of a Bad File Descriptor.
> open() however succeeds. What am I doing wrong?
>
> --Arsalan.
>
>
>
>
> #include <sys/types.h>
> #include <sys/socket.h>
> #include <sys/stat.h>
> #include <netinet/in.h>
> #include <time.h>
> #include <syslog.h>
> #include <unistd.h>
> #include <stdlib.h>
> #include <stdio.h>
> #include <string.h>
> #include <fcntl.h>
> #include <errno.h>
>
> struct file_info_struct
> {
>   char username[8];
>   char password[10];
>   char filename[256];
>   long filesize;
>   time_t timestamp;
> };
>
> main()
> {
> struct file_info_struct file_info;
> int fd,  ret;
> char *msg = "azaidi password file.txt 1024";
> memset(&file_info,0,sizeof(file_info));
>
> sscanf(msg, "%s %s %s %d", file_info.username, file_info.password,
> file_info.filename, &file_info.filesize);
>
> fd = open("aaa.info", O_APPEND);
> printf("error 1 = %d\n", errno);
>
> perror ("after open");
> file://fd = open("/dev/pts/0",0);
> printf("fd = %d\n",fd);
>
> ret = write(fd, &file_info, sizeof(file_info));
>
> printf("write = %d\n",ret);
> printf("error 2 = %d\n", errno);
> perror("write error");
> close(fd);
>
> printf("sizeof = %d\n", sizeof(file_info));
> printf("%s %s %s %d", file_info.username, file_info.password,
> file_info.filename,file_info.filesize);
>
> }
>
>
>
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