git.distorted.org.uk Git - u/mdw/putty/blob - unix/uxsftp.c

   1 /*
   2  * uxsftp.c: the Unix-specific parts of PSFTP and PSCP.
   3  */
   4
   5 #include <sys/time.h>
   6 #include <sys/types.h>
   7 #include <sys/stat.h>
   8 #include <stdlib.h>
   9 #include <fcntl.h>
  10 #include <dirent.h>
  11 #include <unistd.h>
  12 #include <utime.h>
  13 #include <errno.h>
  14 #include <assert.h>
  15
  16 #include "putty.h"
  17 #include "psftp.h"
  18
  19 /*
  20  * In PSFTP our selects are synchronous, so these functions are
  21  * empty stubs.
  22  */
  23 int uxsel_input_add(int fd, int rwx) { return 0; }
  24 void uxsel_input_remove(int id) { }
  25
  26 char *x_get_default(const char *key)
  27 {
  28     return NULL;                       /* this is a stub */
  29 }
  30
  31 void platform_get_x11_auth(char *display, int *protocol,
  32                            unsigned char *data, int *datalen)
  33 {
  34     /* Do nothing, therefore no auth. */
  35 }
  36
  37 const char platform_x11_best_transport[] = "unix";
  38
  39 /*
  40  * Default settings that are specific to PSFTP.
  41  */
  42 char *platform_default_s(const char *name)
  43 {
  44     return NULL;
  45 }
  46
  47 int platform_default_i(const char *name, int def)
  48 {
  49     return def;
  50 }
  51
  52 FontSpec platform_default_fontspec(const char *name)
  53 {
  54     FontSpec ret;
  55     *ret.name = '\0';
  56     return ret;
  57 }
  58
  59 Filename platform_default_filename(const char *name)
  60 {
  61     Filename ret;
  62     if (!strcmp(name, "LogFileName"))
  63         strcpy(ret.path, "putty.log");
  64     else
  65         *ret.path = '\0';
  66     return ret;
  67 }
  68
  69 /*
  70  * Stubs for the GUI feedback mechanism in Windows PSCP.
  71  */
  72 void gui_update_stats(char *name, unsigned long size,
  73                       int percentage, unsigned long elapsed,
  74                       unsigned long done, unsigned long eta,
  75                       unsigned long ratebs) {}
  76 void gui_send_errcount(int list, int errs) {}
  77 void gui_send_char(int is_stderr, int c) {}
  78 void gui_enable(char *arg) {}
  79
  80
  81 /*
  82  * Set local current directory. Returns NULL on success, or else an
  83  * error message which must be freed after printing.
  84  */
  85 char *psftp_lcd(char *dir)
  86 {
  87     if (chdir(dir) < 0)
  88         return dupprintf("%s: chdir: %s", dir, strerror(errno));
  89     else
  90         return NULL;
  91 }
  92
  93 /*
  94  * Get local current directory. Returns a string which must be
  95  * freed.
  96  */
  97 char *psftp_getcwd(void)
  98 {
  99     char *buffer, *ret;
 100     int size = 256;
 101
 102     buffer = snewn(size, char);
 103     while (1) {
 104         ret = getcwd(buffer, size);
 105         if (ret != NULL)
 106             return ret;
 107         if (errno != ERANGE) {
 108             sfree(buffer);
 109             return dupprintf("[cwd unavailable: %s]", strerror(errno));
 110         }
 111         /*
 112          * Otherwise, ERANGE was returned, meaning the buffer
 113          * wasn't big enough.
 114          */
 115         size = size * 3 / 2;
 116         buffer = sresize(buffer, size, char);
 117     }
 118 }
 119
 120 struct RFile {
 121     int fd;
 122 };
 123
 124 RFile *open_existing_file(char *name, unsigned long *size,
 125                           unsigned long *mtime, unsigned long *atime)
 126 {
 127     int fd;
 128     RFile *ret;
 129
 130     fd = open(name, O_RDONLY);
 131     if (fd < 0)
 132         return NULL;
 133
 134     ret = snew(RFile);
 135     ret->fd = fd;
 136
 137     if (size || mtime || atime) {
 138         struct stat statbuf;
 139         if (fstat(fd, &statbuf) < 0) {
 140             fprintf(stderr, "%s: stat: %s\n", name, strerror(errno));
 141             memset(&statbuf, 0, sizeof(statbuf));
 142         }
 143
 144         if (size)
 145             *size = statbuf.st_size;
 146
 147         if (mtime)
 148             *mtime = statbuf.st_mtime;
 149
 150         if (atime)
 151             *atime = statbuf.st_atime;
 152     }
 153
 154     return ret;
 155 }
 156
 157 int read_from_file(RFile *f, void *buffer, int length)
 158 {
 159     return read(f->fd, buffer, length);
 160 }
 161
 162 void close_rfile(RFile *f)
 163 {
 164     close(f->fd);
 165     sfree(f);
 166 }
 167
 168 struct WFile {
 169     int fd;
 170     char *name;
 171 };
 172
 173 WFile *open_new_file(char *name)
 174 {
 175     int fd;
 176     WFile *ret;
 177
 178     fd = open(name, O_CREAT | O_TRUNC | O_WRONLY, 0666);
 179     if (fd < 0)
 180         return NULL;
 181
 182     ret = snew(WFile);
 183     ret->fd = fd;
 184     ret->name = dupstr(name);
 185
 186     return ret;
 187 }
 188
 189 int write_to_file(WFile *f, void *buffer, int length)
 190 {
 191     char *p = (char *)buffer;
 192     int so_far = 0;
 193
 194     /* Keep trying until we've really written as much as we can. */
 195     while (length > 0) {
 196         int ret = write(f->fd, p, length);
 197
 198         if (ret < 0)
 199             return ret;
 200
 201         if (ret == 0)
 202             break;
 203
 204         p += ret;
 205         length -= ret;
 206         so_far += ret;
 207     }
 208
 209     return so_far;
 210 }
 211
 212 void set_file_times(WFile *f, unsigned long mtime, unsigned long atime)
 213 {
 214     struct utimbuf ut;
 215
 216     ut.actime = atime;
 217     ut.modtime = mtime;
 218
 219     utime(f->name, &ut);
 220 }
 221
 222 /* Closes and frees the WFile */
 223 void close_wfile(WFile *f)
 224 {
 225     close(f->fd);
 226     sfree(f->name);
 227     sfree(f);
 228 }
 229
 230 int file_type(char *name)
 231 {
 232     struct stat statbuf;
 233
 234     if (stat(name, &statbuf) < 0) {
 235         if (errno != ENOENT)
 236             fprintf(stderr, "%s: stat: %s\n", name, strerror(errno));
 237         return FILE_TYPE_NONEXISTENT;
 238     }
 239
 240     if (S_ISREG(statbuf.st_mode))
 241         return FILE_TYPE_FILE;
 242
 243     if (S_ISDIR(statbuf.st_mode))
 244         return FILE_TYPE_DIRECTORY;
 245
 246     return FILE_TYPE_WEIRD;
 247 }
 248
 249 struct DirHandle {
 250     DIR *dir;
 251 };
 252
 253 DirHandle *open_directory(char *name)
 254 {
 255     DIR *dir;
 256     DirHandle *ret;
 257
 258     dir = opendir(name);
 259     if (!dir)
 260         return NULL;
 261
 262     ret = snew(DirHandle);
 263     ret->dir = dir;
 264     return ret;
 265 }
 266
 267 char *read_filename(DirHandle *dir)
 268 {
 269     struct dirent *de;
 270
 271     do {
 272         de = readdir(dir->dir);
 273         if (de == NULL)
 274             return NULL;
 275     } while ((de->d_name[0] == '.' &&
 276               (de->d_name[1] == '\0' ||
 277                (de->d_name[1] == '.' && de->d_name[2] == '\0'))));
 278
 279     return dupstr(de->d_name);
 280 }
 281
 282 void close_directory(DirHandle *dir)
 283 {
 284     closedir(dir->dir);
 285     sfree(dir);
 286 }
 287
 288 int test_wildcard(char *name, int cmdline)
 289 {
 290     /*
 291      * On Unix, we currently don't support local wildcards at all.
 292      * We will have to do so (FIXME) once PSFTP starts implementing
 293      * mput, but until then we can assume `cmdline' is always set.
 294      */
 295     struct stat statbuf;
 296
 297     assert(cmdline);
 298     if (stat(name, &statbuf) < 0)
 299         return WCTYPE_NONEXISTENT;
 300     else
 301         return WCTYPE_FILENAME;
 302 }
 303
 304 /*
 305  * Actually return matching file names for a local wildcard. FIXME:
 306  * we currently don't support this at all.
 307  */
 308 struct WildcardMatcher {
 309     int x;
 310 };
 311 WildcardMatcher *begin_wildcard_matching(char *name) { return NULL; }
 312 char *wildcard_get_filename(WildcardMatcher *dir) { return NULL; }
 313 void finish_wildcard_matching(WildcardMatcher *dir) {}
 314
 315 int create_directory(char *name)
 316 {
 317     return mkdir(name, 0777) == 0;
 318 }
 319
 320 char *dir_file_cat(char *dir, char *file)
 321 {
 322     return dupcat(dir, "/", file, NULL);
 323 }
 324
 325 /*
 326  * Wait for some network data and process it.
 327  */
 328 int ssh_sftp_loop_iteration(void)
 329 {
 330     fd_set rset, wset, xset;
 331     int i, fdcount, fdsize, *fdlist;
 332     int fd, fdstate, rwx, ret, maxfd;
 333
 334     fdlist = NULL;
 335     fdcount = fdsize = 0;
 336
 337     /* Count the currently active fds. */
 338     i = 0;
 339     for (fd = first_fd(&fdstate, &rwx); fd >= 0;
 340          fd = next_fd(&fdstate, &rwx)) i++;
 341
 342     if (i < 1)
 343         return -1;                     /* doom */
 344
 345     /* Expand the fdlist buffer if necessary. */
 346     if (i > fdsize) {
 347         fdsize = i + 16;
 348         fdlist = sresize(fdlist, fdsize, int);
 349     }
 350
 351     FD_ZERO(&rset);
 352     FD_ZERO(&wset);
 353     FD_ZERO(&xset);
 354     maxfd = 0;
 355
 356     /*
 357      * Add all currently open fds to the select sets, and store
 358      * them in fdlist as well.
 359      */
 360     fdcount = 0;
 361     for (fd = first_fd(&fdstate, &rwx); fd >= 0;
 362          fd = next_fd(&fdstate, &rwx)) {
 363         fdlist[fdcount++] = fd;
 364         if (rwx & 1)
 365             FD_SET_MAX(fd, maxfd, rset);
 366         if (rwx & 2)
 367             FD_SET_MAX(fd, maxfd, wset);
 368         if (rwx & 4)
 369             FD_SET_MAX(fd, maxfd, xset);
 370     }
 371
 372     do {
 373         ret = select(maxfd, &rset, &wset, &xset, NULL);
 374     } while (ret < 0 && errno == EINTR);
 375
 376     if (ret < 0) {
 377         perror("select");
 378         exit(1);
 379     }
 380
 381     for (i = 0; i < fdcount; i++) {
 382         fd = fdlist[i];
 383         /*
 384          * We must process exceptional notifications before
 385          * ordinary readability ones, or we may go straight
 386          * past the urgent marker.
 387          */
 388         if (FD_ISSET(fd, &xset))
 389             select_result(fd, 4);
 390         if (FD_ISSET(fd, &rset))
 391             select_result(fd, 1);
 392         if (FD_ISSET(fd, &wset))
 393             select_result(fd, 2);
 394     }
 395
 396     sfree(fdlist);
 397
 398     return 0;
 399 }
 400
 401 /*
 402  * Main program: do platform-specific initialisation and then call
 403  * psftp_main().
 404  */
 405 int main(int argc, char *argv[])
 406 {
 407     uxsel_init();
 408     return psftp_main(argc, argv);
 409 }