1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <unistd.h> 4 #include <fcntl.h> 5 #include <string.h> 6 #include <err.h> 7 #include <stdlib.h> 8 9 int max_error = 3; 10 #include "common.h" 11 12 13 int subtest = -1; 14 15 static void do_test(void) 16 { 17 int fd; 18 char *wbuf, *rbuf; 19 off_t off=0; 20 size_t size; 21 ssize_t nwritten; 22 ssize_t nread; 23 char filename[] = "pwrite_test_XXXXXXX"; 24 int i; 25 26 subtest = 1; 27 28 if ((fd = mkstemp(filename)) < 0) e(1); 29 30 size = 1 + rand() % 4096; 31 off = rand(); 32 33 if((wbuf = malloc(sizeof(char)*size)) == NULL) e(2); 34 35 for(i = 0; i < size; i++) { 36 wbuf[i] = 1 + rand()%127; 37 } 38 39 if ((nwritten = pwrite(fd, wbuf, size, off)) < 0) e(3); 40 if ((rbuf = malloc(sizeof(char)*nwritten)) == NULL) e(4); 41 if ((nread = pread(fd, rbuf, nwritten, off)) < 0) e(5); 42 if (strncmp(rbuf, wbuf, nread) != 0) e(6); 43 44 close(fd); 45 free(wbuf); 46 unlink(filename); 47 } 48 49 50 int main(void) 51 { 52 start(54); 53 do_test(); 54 quit(); 55 return(-1); /* Unreachable */ 56 } 57