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/* Copyright (c) 2011-2018 Dovecot authors, see the included COPYING file */
#define _POSIX_PTHREAD_SEMANTICS /* for Solaris */
#include "lib.h"
#include "ipwd.h"
#include <unistd.h>
#define PWBUF_MIN_SIZE 128
#define GRBUF_MIN_SIZE 128
static void *pwbuf = NULL, *grbuf = NULL;
static size_t pwbuf_size, grbuf_size;
static void pw_init(void)
{
size_t old_pwbuf_size = pwbuf_size;
if (pwbuf == NULL || errno == ERANGE) {
pwbuf_size = nearest_power(old_pwbuf_size + 1);
if (pwbuf_size < PWBUF_MIN_SIZE)
pwbuf_size = PWBUF_MIN_SIZE;
pwbuf = i_realloc(pwbuf, old_pwbuf_size, pwbuf_size);
}
}
static void gr_init(void)
{
size_t old_grbuf_size = grbuf_size;
if (grbuf == NULL || errno == ERANGE) {
grbuf_size = nearest_power(old_grbuf_size + 1);
if (grbuf_size < PWBUF_MIN_SIZE)
grbuf_size = PWBUF_MIN_SIZE;
grbuf = i_realloc(grbuf, old_grbuf_size, grbuf_size);
}
}
void ipwd_deinit(void)
{
i_free_and_null(pwbuf);
i_free_and_null(grbuf);
}
int i_getpwnam(const char *name, struct passwd *pwd_r)
{
struct passwd *result;
errno = 0;
do {
pw_init();
errno = getpwnam_r(name, pwd_r, pwbuf, pwbuf_size, &result);
} while (errno == ERANGE);
if (result != NULL)
return 1;
if (errno == EINVAL) {
/* FreeBSD fails here when name="user@domain" */
return 0;
}
return errno == 0 ? 0 : -1;
}
int i_getpwuid(uid_t uid, struct passwd *pwd_r)
{
struct passwd *result;
errno = 0;
do {
pw_init();
errno = getpwuid_r(uid, pwd_r, pwbuf, pwbuf_size, &result);
} while (errno == ERANGE);
if (result != NULL)
return 1;
return errno == 0 ? 0 : -1;
}
int i_getgrnam(const char *name, struct group *grp_r)
{
struct group *result;
errno = 0;
do {
gr_init();
errno = getgrnam_r(name, grp_r, grbuf, grbuf_size, &result);
} while (errno == ERANGE);
if (result != NULL)
return 1;
return errno == 0 ? 0 : -1;
}
int i_getgrgid(gid_t gid, struct group *grp_r)
{
struct group *result;
errno = 0;
do {
gr_init();
errno = getgrgid_r(gid, grp_r, grbuf, grbuf_size, &result);
} while (errno == ERANGE);
if (result != NULL)
return 1;
return errno == 0 ? 0 : -1;
}
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