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// This is a test for access_extended(), one of the more ridiculous syscalls
// ever devised. For bug 200760. See the comments on the wrapper in
// syswrap-darwin.c to understand what is going on here.
#include <sys/syscall.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(void)
{
char* name1 = "access_extended.c";
char* name2 = "no_such_file";
// Space for three descriptors and the two strings (and NUL chars for them).
size_t entries_szB =
sizeof(struct accessx_descriptor) * 3 +
strlen(name1) + 1 +
strlen(name2) + 1;
struct accessx_descriptor* entries = malloc(entries_szB);
char* string1 = (char*)&entries[3];
char* string2 = string1 + strlen(name1) + 1;
int results[3];
int retval;
entries[0].ad_name_offset = string1 - (char*)entries;
entries[1].ad_name_offset = 0; // reuse the previous entry's string
entries[2].ad_name_offset = string2 - (char*)entries;
entries[0].ad_flags = F_OK; // succeeds
entries[1].ad_flags = X_OK; // fails
entries[2].ad_flags = F_OK; // fails
strcpy(string1, name1);
strcpy(string2, name2);
retval = syscall(SYS_access_extended, entries, entries_szB, results,
/*uid--unused?*/0);
fprintf(stderr, "retval = %d\n", retval);
fprintf(stderr, "%s(F_OK) = %d (%s)\n",
name1, results[0], strerror(results[0]));
fprintf(stderr, "%s(X_OK) = %d (%s)\n",
name1, results[1], strerror(results[1]));
fprintf(stderr, "%s(F_OK) = %d (%s)\n",
name2, results[2], strerror(results[2]));
return 0;
}
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