X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/93c6ec104dcd445e39e6bda177b5734198fb3b78..9f3713fc037ca363b514c8d8f7cbb65fdab2e8b1:/apt-pkg/contrib/cdromutl.cc?ds=sidebyside diff --git a/apt-pkg/contrib/cdromutl.cc b/apt-pkg/contrib/cdromutl.cc index b6524a178..187f6bd59 100644 --- a/apt-pkg/contrib/cdromutl.cc +++ b/apt-pkg/contrib/cdromutl.cc @@ -10,24 +10,28 @@ ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ +#include + #include #include #include #include #include +#include -#include - #include -#include #include #include #include #include #include #include + +#include /*}}}*/ +using std::string; + // IsMounted - Returns true if the mount point is mounted /*{{{*/ // --------------------------------------------------------------------- /* This is a simple algorithm that should always work, we stat the mount point @@ -64,41 +68,50 @@ bool UnmountCdrom(string Path) { if (IsMounted(Path) == false) return true; - - int Child = ExecFork(); - // The child - if (Child == 0) + for (int i=0;i<3;i++) { - // Make all the fds /dev/null - for (int I = 0; I != 3; I++) - dup2(open("/dev/null",O_RDWR),I); + + int Child = ExecFork(); - if (_config->Exists("Acquire::cdrom::"+Path+"::UMount") == true) + // The child + if (Child == 0) { - if (system(_config->Find("Acquire::cdrom::"+Path+"::UMount").c_str()) != 0) + // Make all the fds /dev/null + for (int I = 0; I != 3; I++) + dup2(open("/dev/null",O_RDWR),I); + + if (_config->Exists("Acquire::cdrom::"+Path+"::UMount") == true) + { + if (system(_config->Find("Acquire::cdrom::"+Path+"::UMount").c_str()) != 0) + _exit(100); + _exit(0); + } + else + { + const char *Args[10]; + Args[0] = "umount"; + Args[1] = Path.c_str(); + Args[2] = 0; + execvp(Args[0],(char **)Args); _exit(100); - _exit(0); + } } - else - { - const char *Args[10]; - Args[0] = "umount"; - Args[1] = Path.c_str(); - Args[2] = 0; - execvp(Args[0],(char **)Args); - _exit(100); - } + + // if it can not be umounted, give it a bit more time + // this can happen when auto-mount magic or fs/cdrom prober attack + if (ExecWait(Child,"umount",true) == true) + return true; + sleep(1); } - // Wait for mount - return ExecWait(Child,"umount",true); + return false; } /*}}}*/ // MountCdrom - Mount a cdrom /*{{{*/ // --------------------------------------------------------------------- /* We fork mount and drop all messages */ -bool MountCdrom(string Path) +bool MountCdrom(string Path, string DeviceName) { if (IsMounted(Path) == true) return true; @@ -122,8 +135,15 @@ bool MountCdrom(string Path) { const char *Args[10]; Args[0] = "mount"; - Args[1] = Path.c_str(); - Args[2] = 0; + if (DeviceName == "") + { + Args[1] = Path.c_str(); + Args[2] = 0; + } else { + Args[1] = DeviceName.c_str(); + Args[2] = Path.c_str(); + Args[3] = 0; + } execvp(Args[0],(char **)Args); _exit(100); } @@ -140,6 +160,19 @@ bool MountCdrom(string Path) bool IdentCdrom(string CD,string &Res,unsigned int Version) { MD5Summation Hash; + bool writable_media = false; + + // if we are on a writable medium (like a usb-stick) that is just + // used like a cdrom don't use "." as it will constantly change, + // use .disk instead + if (access(CD.c_str(), W_OK) == 0 && DirectoryExists(CD+string("/.disk"))) + { + writable_media = true; + CD = CD.append("/.disk"); + if (_config->FindB("Debug::aptcdrom",false) == true) + std::clog << "Found writable cdrom, using alternative path: " << CD + << std::endl; + } string StartDir = SafeGetCWD(); if (chdir(CD.c_str()) != 0) @@ -176,8 +209,11 @@ bool IdentCdrom(string CD,string &Res,unsigned int Version) Hash.Add(Dir->d_name); }; - if (chdir(StartDir.c_str()) != 0) - return _error->Errno("chdir",_("Unable to change to %s"),StartDir.c_str()); + if (chdir(StartDir.c_str()) != 0) { + _error->Errno("chdir",_("Unable to change to %s"),StartDir.c_str()); + closedir(D); + return false; + } closedir(D); // Some stats from the fsys @@ -186,10 +222,15 @@ bool IdentCdrom(string CD,string &Res,unsigned int Version) struct statvfs Buf; if (statvfs(CD.c_str(),&Buf) != 0) return _error->Errno("statfs",_("Failed to stat the cdrom")); - + // We use a kilobyte block size to advoid overflow - sprintf(S,"%lu %lu",(long)(Buf.f_blocks*(Buf.f_bsize/1024)), - (long)(Buf.f_bfree*(Buf.f_bsize/1024))); + if (writable_media) + { + sprintf(S,"%lu",(long)(Buf.f_blocks*(Buf.f_bsize/1024))); + } else { + sprintf(S,"%lu %lu",(long)(Buf.f_blocks*(Buf.f_bsize/1024)), + (long)(Buf.f_bfree*(Buf.f_bsize/1024))); + } Hash.Add(S); sprintf(S,"-%u",Version); } @@ -200,3 +241,37 @@ bool IdentCdrom(string CD,string &Res,unsigned int Version) return true; } /*}}}*/ + +// FindMountPointForDevice - Find mountpoint for the given device /*{{{*/ +string FindMountPointForDevice(const char *devnode) +{ + char buf[255]; + char *out[10]; + int i=0; + + // this is the order that mount uses as well + const char *mount[] = { "/etc/mtab", + "/proc/mount", + NULL }; + + for (i=0; mount[i] != NULL; i++) { + if (FileExists(mount[i])) { + FILE *f=fopen(mount[i], "r"); + while ( fgets(buf, sizeof(buf), f) != NULL) { + if (strncmp(buf, devnode, strlen(devnode)) == 0) { + if(TokSplitString(' ', buf, out, 10)) + { + fclose(f); + // unescape the \0XXX chars in the path + string mount_point = out[1]; + return DeEscapeString(mount_point); + } + } + } + fclose(f); + } + } + + return string(); +} + /*}}}*/