libs/ardour/find_session.cc

   1 #include <unistd.h>
   2 #include <sys/stat.h>
   3
   4 #include <cstring>
   5 #include <climits>
   6 #include <cerrno>
   7
   8 #include <glibmm/miscutils.h>
   9
  10 #include "pbd/compose.h"
  11 #include "pbd/error.h"
  12
  13 #include "ardour/session_utils.h"
  14 #include "ardour/filename_extensions.h"
  15 #include "ardour/utils.h"
  16
  17 #include "i18n.h"
  18
  19 using namespace std;
  20 using namespace PBD;
  21
  22 int
  23 ARDOUR::find_session (string str, string& path, string& snapshot, bool& isnew)
  24 {
  25         struct stat statbuf;
  26         char buf[PATH_MAX+1];
  27
  28         isnew = false;
  29
  30         if (!realpath (str.c_str(), buf) && (errno != ENOENT && errno != ENOTDIR)) {
  31                 error << string_compose (_("Could not resolve path: %1 (%2)"), buf, strerror(errno)) << endmsg;
  32                 return -1;
  33         }
  34
  35         str = buf;
  36
  37         /* check to see if it exists, and what it is */
  38
  39         if (stat (str.c_str(), &statbuf)) {
  40                 if (errno == ENOENT) {
  41                         isnew = true;
  42                 } else {
  43                         error << string_compose (_("cannot check session path %1 (%2)"), str, strerror (errno))
  44                               << endmsg;
  45                         return -1;
  46                 }
  47         }
  48
  49         if (!isnew) {
  50
  51                 /* it exists, so it must either be the name
  52                    of the directory, or the name of the statefile
  53                    within it.
  54                 */
  55
  56                 if (S_ISDIR (statbuf.st_mode)) {
  57
  58                         string::size_type slash = str.find_last_of (G_DIR_SEPARATOR);
  59
  60                         if (slash == string::npos) {
  61
  62                                 /* a subdirectory of cwd, so statefile should be ... */
  63
  64                                 string tmp = Glib::build_filename (str, str+statefile_suffix);
  65
  66                                 /* is it there ? */
  67
  68                                 if (stat (tmp.c_str(), &statbuf)) {
  69                                         error << string_compose (_("cannot check statefile %1 (%2)"), tmp, strerror (errno))
  70                                               << endmsg;
  71                                         return -1;
  72                                 }
  73
  74                                 path = str;
  75                                 snapshot = str;
  76
  77                         } else {
  78
  79                                 /* some directory someplace in the filesystem.
  80                                    the snapshot name is the directory name
  81                                    itself.
  82                                 */
  83
  84                                 path = str;
  85                                 snapshot = str.substr (slash+1);
  86
  87                         }
  88
  89                 } else if (S_ISREG (statbuf.st_mode)) {
  90
  91                         string::size_type slash = str.find_last_of (G_DIR_SEPARATOR);
  92                         string::size_type suffix;
  93
  94                         /* remove the suffix */
  95
  96                         if (slash != string::npos) {
  97                                 snapshot = str.substr (slash+1);
  98                         } else {
  99                                 snapshot = str;
 100                         }
 101
 102                         suffix = snapshot.find (statefile_suffix);
 103
 104                         if (suffix == string::npos) {
 105                                 error << string_compose (_("%1 is not a snapshot file"), str) << endmsg;
 106                                 return -1;
 107                         }
 108
 109                         /* remove suffix */
 110
 111                         snapshot = snapshot.substr (0, suffix);
 112
 113                         if (slash == string::npos) {
 114
 115                                 /* we must be in the directory where the
 116                                    statefile lives. get it using cwd().
 117                                 */
 118
 119                                 char cwd[PATH_MAX+1];
 120
 121                                 if (getcwd (cwd, sizeof (cwd)) == 0) {
 122                                         error << string_compose (_("cannot determine current working directory (%1)"), strerror (errno))
 123                                               << endmsg;
 124                                         return -1;
 125                                 }
 126
 127                                 path = cwd;
 128
 129                         } else {
 130
 131                                 /* full path to the statefile */
 132
 133                                 path = str.substr (0, slash);
 134                         }
 135
 136                 } else {
 137
 138                         /* what type of file is it? */
 139                         error << string_compose (_("unknown file type for session %1"), str) << endmsg;
 140                         return -1;
 141                 }
 142
 143         } else {
 144
 145                 /* its the name of a new directory. get the name
 146                    as "dirname" does.
 147                 */
 148
 149                 string::size_type slash = str.find_last_of (G_DIR_SEPARATOR);
 150
 151                 if (slash == string::npos) {
 152
 153                         /* no slash, just use the name, but clean it up */
 154
 155                         path = legalize_for_path (str);
 156                         snapshot = path;
 157
 158                 } else {
 159
 160                         path = str;
 161                         snapshot = str.substr (slash+1);
 162                 }
 163         }
 164
 165         return 0;
 166 }