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 "pbd/compose.h"
   9 #include "pbd/error.h"
  10
  11 #include "ardour/session_utils.h"
  12 #include "ardour/filename_extensions.h"
  13 #include "ardour/utils.h"
  14
  15 #include "i18n.h"
  16
  17 using namespace std;
  18 using namespace PBD;
  19
  20 int
  21 ARDOUR::find_session (string str, string& path, string& snapshot, bool& isnew)
  22 {
  23         struct stat statbuf;
  24         char buf[PATH_MAX+1];
  25
  26         isnew = false;
  27
  28         if (!realpath (str.c_str(), buf) && (errno != ENOENT && errno != ENOTDIR)) {
  29                 error << string_compose (_("Could not resolve path: %1 (%2)"), buf, strerror(errno)) << endmsg;
  30                 return -1;
  31         }
  32
  33         str = buf;
  34
  35         /* check to see if it exists, and what it is */
  36
  37         if (stat (str.c_str(), &statbuf)) {
  38                 if (errno == ENOENT) {
  39                         isnew = true;
  40                 } else {
  41                         error << string_compose (_("cannot check session path %1 (%2)"), str, strerror (errno))
  42                               << endmsg;
  43                         return -1;
  44                 }
  45         }
  46
  47         if (!isnew) {
  48
  49                 /* it exists, so it must either be the name
  50                    of the directory, or the name of the statefile
  51                    within it.
  52                 */
  53
  54                 if (S_ISDIR (statbuf.st_mode)) {
  55
  56                         string::size_type slash = str.find_last_of ('/');
  57
  58                         if (slash == string::npos) {
  59
  60                                 /* a subdirectory of cwd, so statefile should be ... */
  61
  62                                 string tmp;
  63                                 tmp = str;
  64                                 tmp += '/';
  65                                 tmp += str;
  66                                 tmp += statefile_suffix;
  67
  68                                 /* is it there ? */
  69
  70                                 if (stat (tmp.c_str(), &statbuf)) {
  71                                         error << string_compose (_("cannot check statefile %1 (%2)"), tmp, strerror (errno))
  72                                               << endmsg;
  73                                         return -1;
  74                                 }
  75
  76                                 path = str;
  77                                 snapshot = str;
  78
  79                         } else {
  80
  81                                 /* some directory someplace in the filesystem.
  82                                    the snapshot name is the directory name
  83                                    itself.
  84                                 */
  85
  86                                 path = str;
  87                                 snapshot = str.substr (slash+1);
  88
  89                         }
  90
  91                 } else if (S_ISREG (statbuf.st_mode)) {
  92
  93                         string::size_type slash = str.find_last_of ('/');
  94                         string::size_type suffix;
  95
  96                         /* remove the suffix */
  97
  98                         if (slash != string::npos) {
  99                                 snapshot = str.substr (slash+1);
 100                         } else {
 101                                 snapshot = str;
 102                         }
 103
 104                         suffix = snapshot.find (statefile_suffix);
 105
 106                         if (suffix == string::npos) {
 107                                 error << string_compose (_("%1 is not an Ardour snapshot file"), str) << endmsg;
 108                                 return -1;
 109                         }
 110
 111                         /* remove suffix */
 112
 113                         snapshot = snapshot.substr (0, suffix);
 114
 115                         if (slash == string::npos) {
 116
 117                                 /* we must be in the directory where the
 118                                    statefile lives. get it using cwd().
 119                                 */
 120
 121                                 char cwd[PATH_MAX+1];
 122
 123                                 if (getcwd (cwd, sizeof (cwd)) == 0) {
 124                                         error << string_compose (_("cannot determine current working directory (%1)"), strerror (errno))
 125                                               << endmsg;
 126                                         return -1;
 127                                 }
 128
 129                                 path = cwd;
 130
 131                         } else {
 132
 133                                 /* full path to the statefile */
 134
 135                                 path = str.substr (0, slash);
 136                         }
 137
 138                 } else {
 139
 140                         /* what type of file is it? */
 141                         error << string_compose (_("unknown file type for session %1"), str) << endmsg;
 142                         return -1;
 143                 }
 144
 145         } else {
 146
 147                 /* its the name of a new directory. get the name
 148                    as "dirname" does.
 149                 */
 150
 151                 string::size_type slash = str.find_last_of ('/');
 152
 153                 if (slash == string::npos) {
 154
 155                         /* no slash, just use the name, but clean it up */
 156
 157                         path = legalize_for_path (str);
 158                         snapshot = path;
 159
 160                 } else {
 161
 162                         path = str;
 163                         snapshot = str.substr (slash+1);
 164                 }
 165         }
 166
 167         return 0;
 168 }