Plugson/src/Core/ventoy_util_linux.c

   1 /******************************************************************************
   2  * ventoy_util_linux.c  ---- ventoy util
   3  * Copyright (c) 2021, longpanda <admin@ventoy.net>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 3 of the
   8  * License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <stdint.h>
  22 #include <string.h>
  23 #include <stdarg.h>
  24 #include <errno.h>
  25 #include <time.h>
  26 #include <unistd.h>
  27 #include <fcntl.h>
  28 #include <sys/types.h>
  29 #include <sys/ioctl.h>
  30 #include <sys/stat.h>
  31 #include <sys/types.h>
  32 #include <sys/mount.h>
  33 #include <linux/fs.h>
  34 #include <dirent.h>
  35 #include <time.h>
  36 #include <ventoy_define.h>
  37 #include <ventoy_util.h>
  38
  39 void ventoy_gen_preudo_uuid(void *uuid)
  40 {
  41     int i;
  42     int fd;
  43
  44     fd = open("/dev/urandom", O_RDONLY | O_BINARY);
  45     if (fd < 0)
  46     {
  47         srand(time(NULL));
  48         for (i = 0; i < 8; i++)
  49         {
  50             *((uint16_t *)uuid + i) = (uint16_t)(rand() & 0xFFFF);
  51         }
  52     }
  53     else
  54     {
  55         read(fd, uuid, 16);
  56         close(fd);
  57     }
  58 }
  59
  60 int ventoy_get_sys_file_line(char *buffer, int buflen, const char *fmt, ...)
  61 {
  62     int len;
  63     char c;
  64     char path[256];
  65     va_list arg;
  66
  67     va_start(arg, fmt);
  68     vsnprintf(path, 256, fmt, arg);
  69     va_end(arg);
  70
  71     if (access(path, F_OK) >= 0)
  72     {
  73         FILE *fp = fopen(path, "r");
  74         memset(buffer, 0, buflen);
  75         len = (int)fread(buffer, 1, buflen - 1, fp);
  76         fclose(fp);
  77
  78         while (len > 0)
  79         {
  80             c = buffer[len - 1];
  81             if (c == '\r' || c == '\n' || c == ' ' || c == '\t')
  82             {
  83                 buffer[len - 1] = 0;
  84                 len--;
  85             }
  86             else
  87             {
  88                 break;
  89             }
  90         }
  91
  92         return 0;
  93     }
  94     else
  95     {
  96         vdebug("%s not exist \n", path);
  97         return 1;
  98     }
  99 }
 100
 101 int ventoy_is_disk_mounted(const char *devpath)
 102 {
 103     int len;
 104     int mount = 0;
 105     char line[512];
 106     FILE *fp = NULL;
 107
 108     fp = fopen("/proc/mounts", "r");
 109     if (!fp)
 110     {
 111         return 0;
 112     }
 113
 114     len = (int)strlen(devpath);
 115     while (fgets(line, sizeof(line), fp))
 116     {
 117         if (strncmp(line, devpath, len) == 0)
 118         {
 119             mount = 1;
 120             vdebug("%s mounted <%s>\n", devpath, line);
 121             goto end;
 122         }
 123     }
 124
 125 end:
 126     fclose(fp);
 127     return mount;
 128 }
 129
 130 const char * ventoy_get_os_language(void)
 131 {
 132     const char *env = getenv("LANG");
 133
 134     if (env && strncasecmp(env, "zh_CN", 5) == 0)
 135     {
 136         return "cn";
 137     }
 138     else
 139     {
 140         return "en";
 141     }
 142 }
 143
 144 int ventoy_is_file_exist(const char *fmt, ...)
 145 {
 146     va_list ap;
 147     struct stat sb;
 148     char fullpath[MAX_PATH];
 149
 150     va_start (ap, fmt);
 151     vsnprintf(fullpath, MAX_PATH, fmt, ap);
 152     va_end (ap);
 153
 154     if (stat(fullpath, &sb))
 155     {
 156         return 0;
 157     }
 158
 159     if (S_ISREG(sb.st_mode))
 160     {
 161         return 1;
 162     }
 163
 164     return 0;
 165 }
 166
 167 int ventoy_is_directory_exist(const char *fmt, ...)
 168 {
 169     va_list ap;
 170     struct stat sb;
 171     char fullpath[MAX_PATH];
 172
 173     va_start (ap, fmt);
 174     vsnprintf(fullpath, MAX_PATH, fmt, ap);
 175     va_end (ap);
 176
 177     if (stat(fullpath, &sb))
 178     {
 179         return 0;
 180     }
 181
 182     if (S_ISDIR(sb.st_mode))
 183     {
 184         return 1;
 185     }
 186
 187     return 0;
 188 }
 189
 190 int ventoy_get_file_size(const char *file)
 191 {
 192         int Size = -1;
 193     struct stat stStat;
 194
 195         if (stat(file, &stStat) >= 0)
 196     {
 197         Size = (int)(stStat.st_size);
 198     }
 199
 200         return Size;
 201 }
 202
 203
 204 int ventoy_write_buf_to_file(const char *FileName, void *Bufer, int BufLen)
 205 {
 206     int fd;
 207     int rc;
 208     ssize_t size;
 209
 210     fd = open(FileName, O_CREAT | O_RDWR | O_TRUNC, 0755);
 211     if (fd < 0)
 212     {
 213         vlog("Failed to open file %s %d\n", FileName, errno);
 214         return 1;
 215     }
 216
 217     rc = fchmod(fd, 0755);
 218     if (rc)
 219     {
 220         vlog("Failed to chmod <%s> %d\n", FileName, errno);
 221     }
 222
 223     size = write(fd, Bufer, BufLen);
 224     if ((int)size != BufLen)
 225     {
 226         close(fd);
 227         vlog("write file %s failed %d err:%d\n", FileName, (int)size, errno);
 228         return 1;
 229     }
 230
 231     fsync(fd);
 232     close(fd);
 233
 234     return 0;
 235 }
 236
 237
 238 static volatile int g_thread_stop = 0;
 239 static pthread_t g_writeback_thread;
 240 static pthread_mutex_t g_writeback_mutex;
 241 static pthread_cond_t g_writeback_cond;
 242 static void * ventoy_local_thread_run(void* data)
 243 {
 244     ventoy_http_writeback_pf callback = (ventoy_http_writeback_pf)data;
 245
 246     while (1)
 247     {
 248         pthread_mutex_lock(&g_writeback_mutex);
 249         pthread_cond_wait(&g_writeback_cond, &g_writeback_mutex);
 250
 251         if (g_thread_stop)
 252         {
 253             pthread_mutex_unlock(&g_writeback_mutex);
 254             break;
 255         }
 256         else
 257         {
 258             callback();
 259             pthread_mutex_unlock(&g_writeback_mutex);
 260         }
 261     }
 262
 263     return NULL;
 264 }
 265
 266 void ventoy_set_writeback_event(void)
 267 {
 268     pthread_cond_signal(&g_writeback_cond);
 269 }
 270
 271 int ventoy_start_writeback_thread(ventoy_http_writeback_pf callback)
 272 {
 273     g_thread_stop = 0;
 274     pthread_mutex_init(&g_writeback_mutex, NULL);
 275     pthread_cond_init(&g_writeback_cond, NULL);
 276
 277     pthread_create(&g_writeback_thread, NULL, ventoy_local_thread_run, callback);
 278
 279     return 0;
 280 }
 281
 282 void ventoy_stop_writeback_thread(void)
 283 {
 284     g_thread_stop = 1;
 285     pthread_cond_signal(&g_writeback_cond);
 286
 287     pthread_join(g_writeback_thread, NULL);
 288
 289
 290     pthread_cond_destroy(&g_writeback_cond);
 291     pthread_mutex_destroy(&g_writeback_mutex);
 292 }
 293
 294
 295 int ventoy_copy_file(const char *a, const char *b)
 296 {
 297     int len = 0;
 298     char *buf = NULL;
 299
 300     if (0 == ventoy_read_file_to_buf(a, 0, (void **)&buf, &len))
 301     {
 302         ventoy_write_buf_to_file(b, buf, len);
 303         free(buf);
 304     }
 305
 306     return 0;
 307 }
 308