1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178
|
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
#include "config.h"
#include "e-db3-utils.h"
#include "db.h"
#include <errno.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <libgnome/gnome-util.h>
static char *
get_check_filename (const char *filename)
{
return g_strdup_printf ("%s-upgrading", filename);
}
static char *
get_copy_filename (const char *filename)
{
return g_strdup_printf ("%s-copy", filename);
}
static int
cp_file (const char *src, const char *dest)
{
int i;
int o;
char buffer[1024];
int length;
int place;
i = open (src, O_RDONLY);
if (i == -1)
return -1;
o = creat (dest, S_IREAD | S_IWRITE);
if (o == -1) {
close (i);
return -1;
}
while (1) {
length = read (i, &buffer, sizeof (buffer));
if (length == 0)
break;
if (length == -1) {
if (errno == EINTR)
continue;
else {
close (i);
close (o);
unlink (dest);
return -1;
}
}
place = 0;
while (length != 0) {
int count;
count = write (o, buffer + place, length);
if (count == -1) {
if (errno == EINTR)
continue;
else {
close (i);
close (o);
unlink (dest);
return -1;
}
}
length -= count;
place += count;
}
}
if (close (i))
return -1;
if (close (o))
return -1;
return 0;
}
static int
touch_file (const char *file)
{
int o;
o = creat (file, S_IREAD | S_IWRITE);
if (o == -1)
return -1;
if (close (o) == -1)
return -1;
return 0;
}
static int
resume_upgrade (const char *filename, const char *copy_filename, const char *check_filename)
{
DB *db;
int ret_val;
ret_val = db_create (&db, NULL, 0);
if (ret_val == 0)
ret_val = cp_file (copy_filename, filename);
if (ret_val == 0)
ret_val = db->upgrade (db, filename, 0);
if (ret_val == 0)
ret_val = unlink (check_filename);
if (ret_val == 0)
ret_val = unlink (copy_filename);
db->close (db, 0);
return ret_val;
}
int
e_db3_utils_maybe_recover (const char *filename)
{
int ret_val = 0;
char *copy_filename;
char *check_filename;
copy_filename = get_copy_filename (filename);
check_filename = get_check_filename (filename);
if (g_file_exists (check_filename)) {
ret_val = resume_upgrade(filename, copy_filename, check_filename);
} else if (g_file_exists (copy_filename)) {
unlink (copy_filename);
}
g_free (copy_filename);
g_free (check_filename);
return ret_val;
}
int
e_db3_utils_upgrade_format (const char *filename)
{
char *copy_filename;
char *check_filename;
DB *db;
int ret_val;
ret_val = db_create (&db, NULL, 0);
if (ret_val != 0)
return ret_val;
copy_filename = get_copy_filename (filename);
check_filename = get_check_filename (filename);
ret_val = cp_file (filename, copy_filename);
if (ret_val == 0)
ret_val = touch_file (check_filename);
if (ret_val == 0)
ret_val = db->upgrade (db, filename, 0);
if (ret_val == 0)
ret_val = unlink (check_filename);
if (ret_val == 0)
ret_val = unlink (copy_filename);
db->close (db, 0);
g_free (check_filename);
g_free (copy_filename);
return ret_val;
}
|