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/*
* Compile: "gcc testlab2.c"
* Run: "./a.out"
*/
#include <string.h>
#include <assert.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#define __LIBRARY__
#include <unistd.h>
_syscall2(int, whoami,char*,name,unsigned int,size);
_syscall1(int, iam, const char*, name);
#define MAX_NAME_LEN 23
#define NAMEBUF_SIZE (MAX_NAME_LEN + 1)
/* truncate a long name to SHORT_NAME_LEN for display */
#define SHORT_NAME_LEN (MAX_NAME_LEN + 2)
/* name score */
#define TEST_CASE { \
{"x", 10, 1, NAMEBUF_SIZE, 1},\
{"sunner", 10, 6, NAMEBUF_SIZE, 6},\
{"Twenty-three characters", 5, 23, NAMEBUF_SIZE, 23},\
{"123456789009876543211234", 5, -1, 0, -1},\
{"abcdefghijklmnopqrstuvwxyz", 5, -1, 0, -1},\
{"Linus Torvalds", 5, 14, NAMEBUF_SIZE, 14},\
{"", 5, 0, NAMEBUF_SIZE, 0},\
{"whoami(0xbalabala, 10)", 5, 22, 10, -1},\
{NULL, 0, 0, 0, 0} /* End of cases */ \
}
/*改动一：增加size,和rval2*/
int test(const char* name, int max_score, int expected_rval1, int size, int expected_rval2);
void print_message(const char* msgfmt, const char* name);
struct test_case
{
char *name;
int score;
int rval1; /* return value of iam() */
/*改动2：增加size,和rval2定义*/
int size; /*Patch for whoami,2009.11.2*/
int rval2; /* return value of whoami() */
};
int main(void)
{
struct test_case cases[] = TEST_CASE;
int total_score=0, i=0;
while (cases[i].score != 0)
{
int score;
printf("Test case %d:", i+1);
/*改动3：增加size,和rval2的参数阿*/
score = test( cases[i].name,
cases[i].score,
cases[i].rval1,
cases[i].size,
cases[i].rval2 );
total_score += score;
i++;
}
printf("Final result: %d%%\n", total_score);
return 0;
}
/*改动4：增加size,和rval2的声明*/
int test(const char* name, int max_score, int expected_rval1, int size, int expected_rval2)
{
int rval;
int len;
char * gotname;
int score=-1;
assert(name != NULL);
print_message("name = \"%s\", length = %d...", name);
/*Test iam()*/
len = strlen(name);
rval = iam(name);
/* printf("Return value = %d\n", rval);*/
/*改动5：增加的expected_rval1*/
if (rval == expected_rval1)
{
if (rval == -1 && errno == EINVAL) /*The system call can detect bad name*/
{
/* print_message("Long name, %s(%d), detected.\n", name);*/
printf("PASS\n");
score = max_score;
}
else if (rval == -1 && errno != EINVAL)
{
printf("\nERROR iam(): Bad errno %d. It should be %d(EINVAL).\n", errno, EINVAL);
score = 0;
}
/* iam() is good. Test whoami() next. */
}
else
{
printf("\nERROR iam(): Return value is %d. It should be %d.\n", rval, expected_rval1);
score = 0;
}
if (score != -1)
return score;
/*Test whoami()*/
gotname = (char*)malloc(len+1);
if (gotname == NULL)
exit(-1);
memset(gotname, 0, len+1);
/* printf("Get: buffer length = %d.\n", len+1); */
rval = whoami(gotname, size);
/* printf("Return value = %d\n", rval); */
/*改动6：增加的expected_rval2*/
/*改动＋＋：比较多 ，但还是顺序的改改*/
if(rval == expected_rval2)
{
if(rval == -1)
{
printf("PASS\n");
score = max_score;
}
else
{
if (strcmp(gotname, name) == 0)
{
/* print_message("Great! We got %s(%d) finally!\n", gotname); */
printf("PASS\n");
score = max_score;
}
else
{
print_message("\nERROR whoami(): we got %s(%d). ", gotname);
print_message("It should be %s(%d).\n", name);
score = 0;
}
}
}
else if (rval == -1)
{
printf("\nERROR whoami(): Return value is -1 and errno is %d. Why?\n", errno);
score = 0;
}
else
{
printf("\nERROR whoami(): Return value should be %d, not %d.\n", expected_rval2, rval);
score = 0;
}
free(gotname);
assert(score != -1);
return score;
}
void print_message(const char* msgfmt, const char* name)
{
char short_name[SHORT_NAME_LEN + 4] = {0};
int len;
len = strlen(name);
if (len == 0)
{
strcpy(short_name, "NULL");
}
else if (len <= SHORT_NAME_LEN)
{
strcpy(short_name, name);
}
else
{
memset(short_name, '.', SHORT_NAME_LEN+3);
memcpy(short_name, name, SHORT_NAME_LEN);
}
printf(msgfmt, short_name, len);
}
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