The following code exits cleanly (exit status 0) on i386, but on macppc exits 4:
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
int main() {
int n;
int fd;
char *s;
struct stat st;
fd = open("./blah",O_RDONLY | O_NDELAY);
if (fd == -1) {
exit(1);
}
if (fstat(fd,&st) == -1) { close(fd); exit(2); }
s = (char *) malloc(st.st_size);
if (!s) { close(fd); exit(3); }
n = read(fd, (char *) s, st.st_size);
if (n == -1) {
fprintf(stderr,"errno: %d\n", errno);
} else {
fprintf(stdout,"bytes: %d\n", n);
}
close(fd);
if (n != st.st_size) { free(s); exit(4); }
free(s);
exit(0);
}
$ gcc -o blah blah.c
i386:
$ ./blah; echo $?
bytes: 6843
0
macppc:
$ ./blah; echo $?
errno: 14
4
According to intro(2) errno 14 is:
14 EFAULT Bad address. The system detected an invalid address in at-
tempting to use an argument of a call.
Is there something wrong with the .c program?
