diff options
Diffstat (limited to 'apt-pkg/contrib/cdromutl.cc')
| -rw-r--r-- | apt-pkg/contrib/cdromutl.cc | 69 |
1 files changed, 52 insertions, 17 deletions
diff --git a/apt-pkg/contrib/cdromutl.cc b/apt-pkg/contrib/cdromutl.cc index 47eb3efc2..c24970553 100644 --- a/apt-pkg/contrib/cdromutl.cc +++ b/apt-pkg/contrib/cdromutl.cc @@ -1,6 +1,6 @@ // -*- mode: cpp; mode: fold -*- // Description /*{{{*/ -// $Id: cdromutl.cc,v 1.2 1999/03/28 01:37:26 jgg Exp $ +// $Id: cdromutl.cc,v 1.3 1999/04/03 01:05:24 jgg Exp $ /* ###################################################################### CDROM Utilities - Some functions to manipulate CDROM mounts. @@ -17,6 +17,7 @@ #include <apt-pkg/error.h> #include <apt-pkg/md5.h> #include <apt-pkg/fileutl.h> +#include <apt-pkg/configuration.h> #include <sys/wait.h> #include <sys/errno.h> @@ -28,11 +29,13 @@ #include <stdio.h> /*}}}*/ -// UnmountCdrom - Unmount a cdrom /*{{{*/ +// IsMounted - Returns true if the mount point is mounted /*{{{*/ // --------------------------------------------------------------------- -/* Forking umount works much better than the umount syscall which can - leave /etc/mtab inconsitant. We drop all messages this produces. */ -bool UnmountCdrom(string Path) +/* This is a simple algorithm that should always work, we stat the mount point + and the '..' file in the mount point and see if they are on the same device. + By definition if they are the same then it is not mounted. This should + account for symlinked mount points as well. */ +bool IsMounted(string &Path) { if (Path.empty() == true) return false; @@ -50,6 +53,17 @@ bool UnmountCdrom(string Path) return _error->Errno("stat","Unable to stat the mount point %s",Path.c_str()); if (Buf.st_dev == Buf2.st_dev) + return false; + return true; +} + /*}}}*/ +// UnmountCdrom - Unmount a cdrom /*{{{*/ +// --------------------------------------------------------------------- +/* Forking umount works much better than the umount syscall which can + leave /etc/mtab inconsitant. We drop all messages this produces. */ +bool UnmountCdrom(string Path) +{ + if (IsMounted(Path) == false) return true; int Child = fork(); @@ -65,12 +79,21 @@ bool UnmountCdrom(string Path) for (int I = 0; I != 3; I++) dup2(open("/dev/null",O_RDWR),I); - const char *Args[10]; - Args[0] = "umount"; - Args[1] = Path.c_str(); - Args[2] = 0; - execvp(Args[0],(char **)Args); - exit(100); + 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); + } } // Wait for mount @@ -93,6 +116,9 @@ bool UnmountCdrom(string Path) /* We fork mount and drop all messages */ bool MountCdrom(string Path) { + if (IsMounted(Path) == true) + return true; + int Child = fork(); if (Child < -1) return _error->Errno("fork","Failed to fork"); @@ -106,12 +132,21 @@ bool MountCdrom(string Path) for (int I = 0; I != 3; I++) dup2(open("/dev/null",O_RDWR),I); - const char *Args[10]; - Args[0] = "mount"; - Args[1] = Path.c_str(); - Args[2] = 0; - execvp(Args[0],(char **)Args); - exit(100); + if (_config->Exists("Acquire::cdrom::"+Path+"::Mount") == true) + { + if (system(_config->Find("Acquire::cdrom::"+Path+"::Mount").c_str()) != 0) + _exit(100); + _exit(0); + } + else + { + const char *Args[10]; + Args[0] = "mount"; + Args[1] = Path.c_str(); + Args[2] = 0; + execvp(Args[0],(char **)Args); + _exit(100); + } } // Wait for mount |