25 January

These programs are also in your repository, under notes/0125

syscall.c

• Build it with: make syscall
• Run it with: ./syscall
• Or trace the system calls: strace ./syscall

#include <stdio.h>
int main()
{
    puts("Hello, world!\n");
//    write(1, "Hello, world!\n", 14);
    return 0;
}

mydelete.c

• A sample system program.

#include <stdio.h>
#include <errno.h>
int main()
{
    const char* FILENAME = "junk.txt";
    int r = unlink(FILENAME);
    perror("unlink:");
    //printf("result: %d\n", r);
    //printf("errno: %d\n", errno);
    return 0;
}

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