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#include <stddef.h>
#include <string.h>
#include <errno.h>
#include <pwd.h>
#include "pthread.h"
static pthread_mutex_t getpw_mutex = PTHREAD_MUTEX_INITIALIZER;
static int
convert (struct passwd *ret, struct passwd *result,
char *buf, int buflen)
{
int len;
if (!buf) return -1;
*result = *ret;
result->pw_name = (char *) buf;
/* This is the size. */
len = strlen (ret->pw_name) + 1;
if (len > buflen) return -1;
buflen -= len;
buf += len;
strcpy (result->pw_name, ret->pw_name);
result->pw_passwd = (char *) buf;
/* This is the size. */
len = strlen (ret->pw_passwd) + 1;
if (len > buflen) return -1;
buflen -= len;
buf += len;
strcpy (result->pw_passwd, ret->pw_passwd);
result->pw_gecos = (char *) buf;
/* This is the size. */
len = strlen (ret->pw_gecos) + 1;
if (len > buflen) return -1;
buflen -= len;
buf += len;
strcpy (result->pw_gecos, ret->pw_gecos);
result->pw_dir = (char *) buf;
/* This is the size. */
len = strlen (ret->pw_dir) + 1;
if (len > buflen) return -1;
buflen -= len;
buf += len;
strcpy (result->pw_dir, ret->pw_dir);
result->pw_shell = (char *) buf;
/* This is the size. */
len = strlen (ret->pw_shell) + 1;
if (len > buflen) return -1;
buflen -= len;
buf += len;
strcpy (result->pw_shell, ret->pw_shell);
return 0;
}
int getpwnam_r (const char *name, struct passwd *result,
char *buffer, size_t buflen,
struct passwd ** resptr)
{
struct passwd * p;
int retval;
pthread_mutex_lock (&getpw_mutex);
p = getpwnam (name);
if (p == NULL) {
*resptr = NULL;
retval = ESRCH;
} else
if (convert (p, result, buffer, buflen) != 0) {
*resptr = NULL;
retval = ERANGE;
} else {
*resptr = result;
retval = 0;
}
pthread_mutex_unlock (&getpw_mutex);
return retval;
}
int getpwuid_r (uid_t uid, struct passwd *result,
char *buffer, size_t buflen,
struct passwd ** resptr)
{
struct passwd * p;
int retval;
pthread_mutex_lock (&getpw_mutex);
p = getpwuid (uid);
if (p == NULL) {
*resptr = NULL;
retval = ESRCH;
} else
if (convert (p, result, buffer, buflen) != 0) {
*resptr = NULL;
retval = ERANGE;
} else {
*resptr = result;
retval = 0;
}
pthread_mutex_unlock (&getpw_mutex);
return retval;
}
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