src/lib-storage/mailbox-uidvalidity.c

bcb4e51a409d94ae670de96afb8483a4f7855294Stephan Bosch/* Copyright (c) 2008-2018 Dovecot authors, see the included COPYING file */
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen#include "lib.h"
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen#include "ioloop.h"
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen#include "str.h"
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen#include "read-full.h"
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen#include "write-full.h"
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen#include "eacces-error.h"
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen#include "mailbox-list.h"
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen#include "mailbox-uidvalidity.h"
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen#include <stdio.h>
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen#include <unistd.h>
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen#include <dirent.h>
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen#include <fcntl.h>
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen#include <sys/stat.h>
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen#define RETRY_COUNT 10
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainenstatic uint32_t mailbox_uidvalidity_next_fallback(void)
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen{
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    static uint32_t uid_validity = 0;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    /* we failed to use the uidvalidity file. don't fail the mailbox
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen       creation because of it though, most of the time it's safe enough
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen       to use the current time as the uidvalidity value. */
0e881a691e6d2d2836d923ef3e92b14aeda60f0dTimo Sirainen    if (uid_validity < (uint32_t)ioloop_time)
0e881a691e6d2d2836d923ef3e92b14aeda60f0dTimo Sirainen        uid_validity = (uint32_t)ioloop_time;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    else
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        uid_validity++;
08d8de8e25e2a130563911fea8378ab24bf8fc9dTimo Sirainen    if (uid_validity == 0)
08d8de8e25e2a130563911fea8378ab24bf8fc9dTimo Sirainen        uid_validity = 1;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    return uid_validity;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen}
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainenstatic void mailbox_uidvalidity_write(struct mailbox_list *list,
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen                      const char *path, uint32_t uid_validity)
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen{
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    char buf[8+1];
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    int fd;
76b91bac787101e6b0075122ab6478dd98c8a884Timo Sirainen    struct mailbox_permissions perm;
76b91bac787101e6b0075122ab6478dd98c8a884Timo Sirainen    mode_t old_mask;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
76b91bac787101e6b0075122ab6478dd98c8a884Timo Sirainen    mailbox_list_get_root_permissions(list, &perm);
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen
76b91bac787101e6b0075122ab6478dd98c8a884Timo Sirainen    old_mask = umask(0666 & ~perm.file_create_mode);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    fd = open(path, O_RDWR | O_CREAT, 0666);
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen    umask(old_mask);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    if (fd == -1) {
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        i_error("open(%s) failed: %m", path);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        return;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    }
76b91bac787101e6b0075122ab6478dd98c8a884Timo Sirainen    if (perm.file_create_gid != (gid_t)-1 &&
76b91bac787101e6b0075122ab6478dd98c8a884Timo Sirainen        fchown(fd, (uid_t)-1, perm.file_create_gid) < 0) {
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen        if (errno == EPERM) {
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen            i_error("%s", eperm_error_get_chgrp("fchown", path,
76b91bac787101e6b0075122ab6478dd98c8a884Timo Sirainen                        perm.file_create_gid,
76b91bac787101e6b0075122ab6478dd98c8a884Timo Sirainen                        perm.file_create_gid_origin));
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen        } else {
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen            i_error("fchown(%s, -1, %ld) failed: %m",
76b91bac787101e6b0075122ab6478dd98c8a884Timo Sirainen                path, (long)perm.file_create_gid);
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen        }
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen    }
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen
e34d170f8f0e084bd94bfbc1a7085ece67e508dfTimo Sirainen    if (i_snprintf(buf, sizeof(buf), "%08x", uid_validity) < 0)
e34d170f8f0e084bd94bfbc1a7085ece67e508dfTimo Sirainen        i_unreached();
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    if (pwrite_full(fd, buf, strlen(buf), 0) < 0)
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        i_error("write(%s) failed: %m", path);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    if (close(fd) < 0)
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        i_error("close(%s) failed: %m", path);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen}
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
3426a5f4c7925cfb76208c7b1abf49b861d273e3Timo Sirainenstatic int
3426a5f4c7925cfb76208c7b1abf49b861d273e3Timo Sirainenmailbox_uidvalidity_rename(const char *path, uint32_t *uid_validity,
3426a5f4c7925cfb76208c7b1abf49b861d273e3Timo Sirainen               bool log_enoent)
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen{
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    string_t *src, *dest;
2ac5f36aa7c2e7a07ba8815d43a6d7483f62e74cTimo Sirainen    unsigned int i;
2ac5f36aa7c2e7a07ba8815d43a6d7483f62e74cTimo Sirainen    size_t prefix_len;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    int ret;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    src = t_str_new(256);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    str_append(src, path);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    dest = t_str_new(256);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    str_append(dest, path);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    prefix_len = str_len(src);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    for (i = 0; i < RETRY_COUNT; i++) {
3426a5f4c7925cfb76208c7b1abf49b861d273e3Timo Sirainen        str_truncate(src, prefix_len);
3426a5f4c7925cfb76208c7b1abf49b861d273e3Timo Sirainen        str_truncate(dest, prefix_len);
3426a5f4c7925cfb76208c7b1abf49b861d273e3Timo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        str_printfa(src, ".%08x", *uid_validity);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        *uid_validity += 1;
08d8de8e25e2a130563911fea8378ab24bf8fc9dTimo Sirainen        if (*uid_validity == 0)
08d8de8e25e2a130563911fea8378ab24bf8fc9dTimo Sirainen            *uid_validity += 1;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        str_printfa(dest, ".%08x", *uid_validity);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        if ((ret = rename(str_c(src), str_c(dest))) == 0 ||
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen            errno != ENOENT)
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen            break;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        /* possibly a race condition. try the next value. */
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    }
3426a5f4c7925cfb76208c7b1abf49b861d273e3Timo Sirainen    if (ret < 0 && (errno != ENOENT || log_enoent))
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        i_error("rename(%s, %s) failed: %m", str_c(src), str_c(dest));
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    return ret;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen}
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainenstatic uint32_t
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainenmailbox_uidvalidity_next_rescan(struct mailbox_list *list, const char *path)
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen{
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    DIR *d;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    struct dirent *dp;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    const char *fname, *dir, *prefix, *tmp;
2ac5f36aa7c2e7a07ba8815d43a6d7483f62e74cTimo Sirainen    unsigned int i;
2ac5f36aa7c2e7a07ba8815d43a6d7483f62e74cTimo Sirainen    size_t prefix_len;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    uint32_t cur_value, min_value, max_value;
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen    mode_t old_mask;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    int fd;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    fname = strrchr(path, '/');
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    if (fname == NULL) {
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        dir = ".";
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        fname = path;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    } else {
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        dir = t_strdup_until(path, fname);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        fname++;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    }
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    d = opendir(dir);
8cadc80b21c1087b6dd1b48a6522dcc52a081eacTimo Sirainen    if (d == NULL && errno == ENOENT) {
8cadc80b21c1087b6dd1b48a6522dcc52a081eacTimo Sirainen        /* FIXME: the PATH_TYPE_CONTROL should come as a parameter, but
8cadc80b21c1087b6dd1b48a6522dcc52a081eacTimo Sirainen           that's an API change, do it in v2.3. it's not really a
8cadc80b21c1087b6dd1b48a6522dcc52a081eacTimo Sirainen           problem though, since currently all backends use control
8cadc80b21c1087b6dd1b48a6522dcc52a081eacTimo Sirainen           dirs for the uidvalidity file. */
8cadc80b21c1087b6dd1b48a6522dcc52a081eacTimo Sirainen        (void)mailbox_list_mkdir_root(list, dir, MAILBOX_LIST_PATH_TYPE_CONTROL);
8cadc80b21c1087b6dd1b48a6522dcc52a081eacTimo Sirainen        d = opendir(dir);
8cadc80b21c1087b6dd1b48a6522dcc52a081eacTimo Sirainen    }
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    if (d == NULL) {
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        i_error("opendir(%s) failed: %m", dir);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        return mailbox_uidvalidity_next_fallback();
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    }
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    prefix = t_strconcat(fname, ".", NULL);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    prefix_len = strlen(prefix);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    /* just in case there happens to be multiple matching uidvalidity
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen       files, track the min/max values. use the max value and delete the
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen       min value file. */
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    max_value = 0; min_value = (uint32_t)-1;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    while ((dp = readdir(d)) != NULL) {
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        if (strncmp(dp->d_name, prefix, prefix_len) == 0) {
e48f289d2e5b2546a2c5dcc90f7ab624cc58cca2Stephan Bosch            if (str_to_uint32_hex(dp->d_name + prefix_len, &cur_value) >= 0) {
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen                if (min_value > cur_value)
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen                    min_value = cur_value;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen                if (max_value < cur_value)
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen                    max_value = cur_value;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen            }
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        }
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    }
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    if (closedir(d) < 0)
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        i_error("closedir(%s) failed: %m", dir);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    if (max_value == 0) {
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        /* no uidvalidity files. create one. */
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        for (i = 0; i < RETRY_COUNT; i++) {
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen            cur_value = mailbox_uidvalidity_next_fallback();
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen            tmp = t_strdup_printf("%s.%08x", path, cur_value);
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen            /* the file is empty, don't bother with permissions */
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen            old_mask = umask(0);
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen            fd = open(tmp, O_RDWR | O_CREAT | O_EXCL, 0444);
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen            umask(old_mask);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen            if (fd != -1 || errno != EEXIST)
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen                break;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen            /* already exists. although it's quite unlikely we'll
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen               hit this race condition. more likely we'll create
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen               a duplicate file.. */
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        }
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        if (fd == -1) {
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen            i_error("creat(%s) failed: %m", tmp);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen            return cur_value;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        }
4307c886579381dbb1897ea1388ae6978c96f560Timo Sirainen        i_close_fd(&fd);
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen        mailbox_uidvalidity_write(list, path, cur_value);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        return cur_value;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    }
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    if (min_value != max_value) {
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        /* duplicate uidvalidity files, delete the oldest */
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        tmp = t_strdup_printf("%s.%08x", path, min_value);
46b823ac3bce2c0f9f0fc73911e48d3a77b04fbeTimo Sirainen        i_unlink_if_exists(tmp);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    }
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    cur_value = max_value;
3426a5f4c7925cfb76208c7b1abf49b861d273e3Timo Sirainen    if (mailbox_uidvalidity_rename(path, &cur_value, TRUE) < 0)
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        return mailbox_uidvalidity_next_fallback();
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen    mailbox_uidvalidity_write(list, path, cur_value);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    return cur_value;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen}
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainenuint32_t mailbox_uidvalidity_next(struct mailbox_list *list, const char *path)
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen{
e48f289d2e5b2546a2c5dcc90f7ab624cc58cca2Stephan Bosch    char buf[8+1];
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    uint32_t cur_value;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    int fd, ret;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    fd = open(path, O_RDWR);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    if (fd == -1) {
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        if (errno != ENOENT)
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen            i_error("open(%s) failed: %m", path);
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen        return mailbox_uidvalidity_next_rescan(list, path);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    }
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    ret = read_full(fd, buf, sizeof(buf)-1);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    if (ret < 0) {
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        i_error("read(%s) failed: %m", path);
4307c886579381dbb1897ea1388ae6978c96f560Timo Sirainen        i_close_fd(&fd);
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen        return mailbox_uidvalidity_next_rescan(list, path);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    }
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    buf[sizeof(buf)-1] = 0;
08d8de8e25e2a130563911fea8378ab24bf8fc9dTimo Sirainen    if (ret == 0 || str_to_uint32_hex(buf, &cur_value) < 0 ||
08d8de8e25e2a130563911fea8378ab24bf8fc9dTimo Sirainen        cur_value == 0) {
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        /* broken value */
4307c886579381dbb1897ea1388ae6978c96f560Timo Sirainen        i_close_fd(&fd);
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen        return mailbox_uidvalidity_next_rescan(list, path);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    }
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    /* we now have the current uidvalidity value that's hopefully correct */
5e93930ec684cac19d71c44e5e42690acf452a74Timo Sirainen    if (mailbox_uidvalidity_rename(path, &cur_value, FALSE) < 0) {
af8b1248fed8529d26985460acdc4b1e4b7de675Timo Sirainen        i_close_fd(&fd);
a920bbb8580be2446af28a77dac9ecf548f3c6f4Timo Sirainen        return mailbox_uidvalidity_next_rescan(list, path);
af8b1248fed8529d26985460acdc4b1e4b7de675Timo Sirainen    }
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    /* fast path succeeded. write the current value to the main
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen       uidvalidity file. */
e34d170f8f0e084bd94bfbc1a7085ece67e508dfTimo Sirainen    if (i_snprintf(buf, sizeof(buf), "%08x", cur_value) < 0)
e34d170f8f0e084bd94bfbc1a7085ece67e508dfTimo Sirainen        i_unreached();
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    if (pwrite_full(fd, buf, strlen(buf), 0) < 0)
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        i_error("write(%s) failed: %m", path);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    if (close(fd) < 0)
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen        i_error("close(%s) failed: %m", path);
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen    return cur_value;
300baf826ba39003b861e7716c35bae372e6f23eTimo Sirainen}