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The second adds the LEGACY_PTY config option. Without it, with late 2.6 kernels
/dev/ptyxx won't work. In fact, with those kernels, root_fs_toms does not
work, because it's "unable to allocate TTY pair". And removes the dead option
"UNIX98_PTY_COUNT" (just commented out for now).
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
---
uml-linux-2.6.7-paolo/arch/um/Kconfig_char | 57 ++++++++++++++++++++++++++---
1 files changed, 53 insertions(+), 4 deletions(-)
diff -puN arch/um/Kconfig_char~LegacyTerminalSupport arch/um/Kconfig_char
--- uml-linux-2.6.7/arch/um/Kconfig_char~LegacyTerminalSupport 2004-06-29 21:03:01.420421432 +0200
+++ uml-linux-2.6.7-paolo/arch/um/Kconfig_char 2004-06-29 21:03:01.423420976 +0200
@@ -108,11 +108,60 @@ config SSL_CHAN
config UNIX98_PTYS
bool "Unix98 PTY support"
-
-config UNIX98_PTY_COUNT
- int "Maximum number of Unix98 PTYs in use (0-2048)"
- depends on UNIX98_PTYS
+ ---help---
+ A pseudo terminal (PTY) is a software device consisting of two
+ halves: a master and a slave. The slave device behaves identical to
+ a physical terminal; the master device is used by a process to
+ read data from and write data to the slave, thereby emulating a
+ terminal. Typical programs for the master side are telnet servers
+ and xterms.
+
+ Linux has traditionally used the BSD-like names /dev/ptyxx for
+ masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
+ has a number of problems. The GNU C library glibc 2.1 and later,
+ however, supports the Unix98 naming standard: in order to acquire a
+ pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
+ terminal is then made available to the process and the pseudo
+ terminal slave can be accessed as /dev/pts/<number>. What was
+ traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
+
+ All modern Linux systems use the Unix98 ptys. Say Y unless
+ you're on an embedded system and want to conserve memory.
+
+config LEGACY_PTYS
+ bool "Legacy (BSD) PTY support"
+ default y
+ ---help---
+ A pseudo terminal (PTY) is a software device consisting of two
+ halves: a master and a slave. The slave device behaves identical to
+ a physical terminal; the master device is used by a process to
+ read data from and write data to the slave, thereby emulating a
+ terminal. Typical programs for the master side are telnet servers
+ and xterms.
+
+ Linux has traditionally used the BSD-like names /dev/ptyxx
+ for masters and /dev/ttyxx for slaves of pseudo
+ terminals. This scheme has a number of problems, including
+ security. This option enables these legacy devices; on most
+ systems, it is safe to say N.
+
+
+config LEGACY_PTY_COUNT
+ int "Maximum number of legacy PTY in use"
+ depends on LEGACY_PTYS
default "256"
+ ---help---
+ The maximum number of legacy PTYs that can be used at any one time.
+ The default is 256, and should be more than enough. Embedded
+ systems may want to reduce this to save memory.
+
+ When not in use, each legacy PTY occupies 12 bytes on 32-bit
+ architectures and 24 bytes on 64-bit architectures.
+
+#config UNIX98_PTY_COUNT
+# int "Maximum number of Unix98 PTYs in use (0-2048)"
+# depends on UNIX98_PTYS
+# default "256"
config WATCHDOG
bool "Watchdog Timer Support"
_
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