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Add new user mode option -ignore-environment

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An empty environment is sometimes useful in user mode.
The new option provides it for linux-user and bsd-user
(darwin-user still has no environment related options).

The patch also adds the documentation for other
environment related options.

Signed-off-by: Stefan Weil <weil@mail.berlios.de>
This commit is contained in:
Stefan Weil 2010-07-15 22:28:02 +02:00 committed by Anthony Liguori
parent 999fa40e43
commit f66724c99a
3 changed files with 26 additions and 0 deletions
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6
bsd-user/main.c
View file

@ -795,6 +795,12 @@ int main(int argc, char **argv)
r = argv[optind++];
if (envlist_setenv(envlist, r) != 0)
usage();
} else if (!strcmp(r, "ignore-environment")) {
envlist_free(envlist);
if ((envlist = envlist_create()) == NULL) {
(void) fprintf(stderr, "Unable to allocate envlist\n");
exit(1);
}
} else if (!strcmp(r, "U")) {
r = argv[optind++];
if (envlist_unsetenv(envlist, r) != 0)

6
linux-user/main.c
View file

@ -2790,6 +2790,12 @@ int main(int argc, char **argv, char **envp)
r = argv[optind++];
if (envlist_setenv(envlist, r) != 0)
usage();
} else if (!strcmp(r, "ignore-environment")) {
envlist_free(envlist);
if ((envlist = envlist_create()) == NULL) {
(void) fprintf(stderr, "Unable to allocate envlist\n");
exit(1);
}
} else if (!strcmp(r, "U")) {
r = argv[optind++];
if (envlist_unsetenv(envlist, r) != 0)

14
qemu-doc.texi
View file

@ -2186,6 +2186,13 @@ Set the x86 elf interpreter prefix (default=/usr/local/qemu-i386)
Set the x86 stack size in bytes (default=524288)
@item -cpu model
Select CPU model (-cpu ? for list and additional feature selection)
@item -ignore-environment
Start with an empty environment. Without this option,
the inital environment is a copy of the caller's environment.
@item -E @var{var}=@var{value}
Set environment @var{var} to @var{value}.
@item -U @var{var}
Remove @var{var} from the environment.
@item -B offset
Offset guest address by the specified number of bytes. This is useful when
the address region required by guest applications is reserved on the host.
@ -2409,6 +2416,13 @@ Print the help
Set the library root path (default=/)
@item -s size
Set the stack size in bytes (default=524288)
@item -ignore-environment
Start with an empty environment. Without this option,
the inital environment is a copy of the caller's environment.
@item -E @var{var}=@var{value}
Set environment @var{var} to @var{value}.
@item -U @var{var}
Remove @var{var} from the environment.
@item -bsd type
Set the type of the emulated BSD Operating system. Valid values are
FreeBSD, NetBSD and OpenBSD (default).