mdw@git.distorted.org.uk Git - sgt/putty/blob - psftp.h

   1 /*
   2  * psftp.h: interface between psftp.c / scp.c and each
   3  * platform-specific SFTP module.
   4  */
   5
   6 #include "int64.h"
   7
   8 #ifndef PUTTY_PSFTP_H
   9 #define PUTTY_PSFTP_H
  10
  11 /*
  12  * psftp_getcwd returns the local current directory. The returned
  13  * string must be freed by the caller.
  14  */
  15 char *psftp_getcwd(void);
  16
  17 /*
  18  * psftp_lcd changes the local current directory. The return value
  19  * is NULL on success, or else an error message which must be freed
  20  * by the caller.
  21  */
  22 char *psftp_lcd(char *newdir);
  23
  24 /*
  25  * Retrieve file times on a local file. Must return two unsigned
  26  * longs in POSIX time_t format.
  27  */
  28 void get_file_times(char *filename, unsigned long *mtime,
  29                     unsigned long *atime);
  30
  31 /*
  32  * One iteration of the PSFTP event loop: wait for network data and
  33  * process it, once.
  34  */
  35 int ssh_sftp_loop_iteration(void);
  36
  37 /*
  38  * Read a command line for PSFTP from standard input. Caller must
  39  * free.
  40  *
  41  * If `backend_required' is TRUE, should also listen for activity
  42  * at the backend (rekeys, clientalives, unexpected closures etc)
  43  * and respond as necessary, and if the backend closes it should
  44  * treat this as a failure condition. If `backend_required' is
  45  * FALSE, a back end is not (intentionally) active at all (e.g.
  46  * psftp before an `open' command).
  47  */
  48 char *ssh_sftp_get_cmdline(char *prompt, int backend_required);
  49
  50 /*
  51  * The main program in psftp.c. Called from main() in the platform-
  52  * specific code, after doing any platform-specific initialisation.
  53  */
  54 int psftp_main(int argc, char *argv[]);
  55
  56 /*
  57  * These functions are used by PSCP to transmit progress updates
  58  * and error information to a GUI window managing it. This will
  59  * probably only ever be supported on Windows, so these functions
  60  * can safely be stubs on all other platforms.
  61  */
  62 void gui_update_stats(char *name, unsigned long size,
  63                       int percentage, unsigned long elapsed,
  64                       unsigned long done, unsigned long eta,
  65                       unsigned long ratebs);
  66 void gui_send_errcount(int list, int errs);
  67 void gui_send_char(int is_stderr, int c);
  68 void gui_enable(char *arg);
  69
  70 /*
  71  * It's likely that a given platform's implementation of file
  72  * transfer utilities is going to want to do things with them that
  73  * aren't present in stdio. Hence we supply an alternative
  74  * abstraction for file access functions.
  75  *
  76  * This abstraction tells you the size and access times when you
  77  * open an existing file (platforms may choose the meaning of the
  78  * file times if it's not clear; whatever they choose will be what
  79  * PSCP sends to the server as mtime and atime), and lets you set
  80  * the times when saving a new file.
  81  *
  82  * On the other hand, the abstraction is pretty simple: it supports
  83  * only opening a file and reading it, or creating a file and writing
  84  * it. None of this read-and-write, seeking-back-and-forth stuff.
  85  */
  86 typedef struct RFile RFile;
  87 typedef struct WFile WFile;
  88 /* Output params size, perms, mtime and atime can all be NULL if
  89  * desired. perms will be -1 if the OS does not support POSIX permissions. */
  90 RFile *open_existing_file(char *name, uint64 *size,
  91                           unsigned long *mtime, unsigned long *atime,
  92                           long *perms);
  93 WFile *open_existing_wfile(char *name, uint64 *size);
  94 /* Returns <0 on error, 0 on eof, or number of bytes read, as usual */
  95 int read_from_file(RFile *f, void *buffer, int length);
  96 /* Closes and frees the RFile */
  97 void close_rfile(RFile *f);
  98 WFile *open_new_file(char *name, long perms);
  99 /* Returns <0 on error, 0 on eof, or number of bytes written, as usual */
 100 int write_to_file(WFile *f, void *buffer, int length);
 101 void set_file_times(WFile *f, unsigned long mtime, unsigned long atime);
 102 /* Closes and frees the WFile */
 103 void close_wfile(WFile *f);
 104 /* Seek offset bytes through file */
 105 enum { FROM_START, FROM_CURRENT, FROM_END };
 106 int seek_file(WFile *f, uint64 offset, int whence);
 107 /* Get file position */
 108 uint64 get_file_posn(WFile *f);
 109 /*
 110  * Determine the type of a file: nonexistent, file, directory or
 111  * weird. `weird' covers anything else - named pipes, Unix sockets,
 112  * device files, fish, badgers, you name it. Things marked `weird'
 113  * will be skipped over in recursive file transfers, so the only
 114  * real reason for not lumping them in with `nonexistent' is that
 115  * it allows a slightly more sane error message.
 116  */
 117 enum {
 118     FILE_TYPE_NONEXISTENT, FILE_TYPE_FILE, FILE_TYPE_DIRECTORY, FILE_TYPE_WEIRD
 119 };
 120 int file_type(char *name);
 121
 122 /*
 123  * Read all the file names out of a directory.
 124  */
 125 typedef struct DirHandle DirHandle;
 126 DirHandle *open_directory(char *name);
 127 /* The string returned from this will need freeing if not NULL */
 128 char *read_filename(DirHandle *dir);
 129 void close_directory(DirHandle *dir);
 130
 131 /*
 132  * Test a filespec to see whether it's a local wildcard or not.
 133  * Return values:
 134  *
 135  *  - WCTYPE_WILDCARD (this is a wildcard).
 136  *  - WCTYPE_FILENAME (this is a single file name).
 137  *  - WCTYPE_NONEXISTENT (whichever it was, nothing of that name exists).
 138  *
 139  * Some platforms may choose not to support local wildcards when
 140  * they come from the command line; in this case they simply never
 141  * return WCTYPE_WILDCARD, but still test the file's existence.
 142  * (However, all platforms will probably want to support wildcards
 143  * inside the PSFTP CLI.)
 144  */
 145 enum {
 146     WCTYPE_NONEXISTENT, WCTYPE_FILENAME, WCTYPE_WILDCARD
 147 };
 148 int test_wildcard(char *name, int cmdline);
 149
 150 /*
 151  * Actually return matching file names for a local wildcard.
 152  */
 153 typedef struct WildcardMatcher WildcardMatcher;
 154 WildcardMatcher *begin_wildcard_matching(char *name);
 155 /* The string returned from this will need freeing if not NULL */
 156 char *wildcard_get_filename(WildcardMatcher *dir);
 157 void finish_wildcard_matching(WildcardMatcher *dir);
 158
 159 /*
 160  * Vet a filename returned from the remote host, to ensure it isn't
 161  * in some way malicious. The idea is that this function is applied
 162  * to filenames returned from FXP_READDIR, which means we can panic
 163  * if we see _anything_ resembling a directory separator.
 164  *
 165  * Returns TRUE if the filename is kosher, FALSE if dangerous.
 166  */
 167 int vet_filename(char *name);
 168
 169 /*
 170  * Create a directory. Returns 0 on error, !=0 on success.
 171  */
 172 int create_directory(char *name);
 173
 174 /*
 175  * Concatenate a directory name and a file name. The way this is
 176  * done will depend on the OS.
 177  */
 178 char *dir_file_cat(char *dir, char *file);
 179
 180 #endif /* PUTTY_PSFTP_H */