1. Complete a function convertToUpper(const char* name) to convert every lower case letter in the file into upper case letters. You need to make use of the following system calls in the function implementation:
   1. open()
   2. read()
   3. lseek()
   4. write()
   5. close()

You have to complete the function definition in the attached prog.c file which includes main() calling covertToUpper(data.txt). data.txt file is also attached. Your function should use the buffer size of 10 bytes in reading and writing. If you use the other buffer sizes, you will not get the full credit

prog.c

#define BUFSIZE 10 // you need to complete this function // fd: file descriptor passed by the main function (already opened for you) // name: string for the file name int convertToUpper(int fd, const char* name) { } int main() { int i, cnt, fd, nread; off_t fileSize; char temp[500]; fd = open("data.txt", O_RDWR); fileSize = lseek(fd, (off_t)0, SEEK_END); lseek(fd, (off_t)0, SEEK_SET); cnt = convertToUpper(fd, "data.txt"); lseek(fd, (off_t)0, SEEK_SET); nread = read(fd, temp, 500); for(i=0; i

data.txt

Bottomless vales and boundless floods, And chasms, and caves, and Titan woods, With forms that no man can discover For the tears that drip all over; Mountains toppling evermore Into seas without a shore; Seas that restlessly aspire, Surging, unto skies of fire; Lakes that endlessly outspread Their lone waters lone and dead, Their still waters still and chilly With the snows of the lolling lily.

please write progam in c

return the number of char converted to upper