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#include "config.h"
#include <assert.h>
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <libgen.h>
#include <limits.h>
#include <pwd.h>
#define TEST_PASSWD "test/test.passwd"
static char pwfile[] = BASEDIR "/" TEST_PASSWD;
#define ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask))
#define ALIGN(x, a) ALIGN_MASK(x, (typeof(x))(a) - 1)
static int test_getpwent_r(FILE *file, struct passwd *pwd, char *buf,
size_t buflen, struct passwd **result)
{
char *str, *line;
int index = 0;
*result = NULL;
line = fgets(buf, buflen, file);
if (!line) {
return 0;
}
while ((str = strtok(line, ":"))) {
switch (index++) {
case 0:
pwd->pw_name = str;
break;
case 1:
pwd->pw_passwd = str;
break;
case 2:
errno = 0;
pwd->pw_uid = strtol(str, NULL, 10);
if (errno)
return -1;
break;
case 3:
errno = 0;
pwd->pw_gid = strtol(str, NULL, 10);
if (errno)
return -1;
break;
case 4:
pwd->pw_gecos = str;
break;
case 5:
pwd->pw_dir = str;
break;
case 6:
pwd->pw_shell = str;
break;
}
line = NULL;
}
*result = pwd;
return 0;
}
static int test_getpw_match(struct passwd *pwd, char *buf, size_t buflen,
struct passwd **result,
int (*match)(const struct passwd *, const void *),
const void *data)
{
FILE *file;
struct passwd *_result;
*result = NULL;
file = fopen(pwfile, "r");
if (!file) {
fprintf(stderr, "Failed to open %s\n", pwfile);
errno = EBADF;
return -1;
}
errno = 0;
while (!test_getpwent_r(file, pwd, buf, buflen, &_result)) {
if (!_result)
break;
else if (match(pwd, data)) {
*result = pwd;
break;
}
}
fclose(file);
if (!errno && !*result)
errno = ENOENT;
if (errno)
return -1;
return 0;
}
static int match_name(const struct passwd *pwd, const void *data)
{
const char *name = data;
return !strcmp(pwd->pw_name, name);
}
EXPORT
int getpwnam_r(const char *name, struct passwd *pwd, char *buf, size_t buflen,
struct passwd **result)
{
static size_t last_buflen = -1;
assert(last_buflen == -1 || buflen > last_buflen);
if (buflen < 170000) {
last_buflen = buflen;
*result = NULL;
return ERANGE;
}
last_buflen =- 1;
return test_getpw_match(pwd, buf, buflen, result, match_name, name);
}
EXPORT
struct passwd *getpwnam(const char *name)
{
static char buf[16384];
static struct passwd pwd;
struct passwd *result;
(void) getpwnam_r(name, &pwd, buf, sizeof(buf), &result);
return result;
}
static int match_uid(const struct passwd *pwd, const void *data)
{
uid_t uid = *(uid_t *)data;
return pwd->pw_uid == uid;
}
EXPORT
int getpwuid_r(uid_t uid, struct passwd *pwd, char *buf, size_t buflen,
struct passwd **result)
{
return test_getpw_match(pwd, buf, buflen, result, match_uid, &uid);
}
EXPORT
struct passwd *getpwuid(uid_t uid)
{
static char buf[16384];
static struct passwd pwd;
struct passwd *result;
(void) getpwuid_r(uid, &pwd, buf, sizeof(buf), &result);
return result;
}
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