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

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