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  1. 19 2月, 2014 8 次提交
    • S
      cmd_test: evaluate to false without any arguments · 2453de99
      由 Stephen Warren 提交于 
      This emulates bash:
$ if test; then echo yes; else echo no; fi
no

Currently, the code sets expr = -1 in this case, which gets mapped to
0 (true) at the end of do_test() by the logical -> shell exit code
conversion.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
      2453de99
    • S
      cmd_test: implement ! on sub-expressions · d9b651ce
      由 Stephen Warren 提交于 
      Currently, ! can only be parsed as the first operator in an expression.
This prevents the following from working:

$ if test ! ! 1 -eq 1; then echo yes; else echo no; fi
yes
$ if test ! 1 -eq 2 -a ! 3 -eq 4; then echo yes; else echo no; fi
yes

Fix this by parsing ! like any other operator, and and handling it
similarly to -a and -o.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
      d9b651ce
    • S
      cmd_test: check for binary operators before unary · 4c80f29e
      由 Stephen Warren 提交于 
      This better mirrors the behaviour of bash, for example:

$ if test -z = -z; then echo yes; else echo no; fi
yes

This is parsed as a string comparison of "-z" and "-z", since the check
for the binary "=" operator occurs first. Without this change, the
command would be parsed as a -z test of "-", followed by a syntax error;
a trailing -z without and operand.

This is a behavioural change, but I believe any commands affected were
previously invalid or bizarely formed.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
      4c80f29e
    • S
      cmd_test: use table lookup for parsing · 490ba833
      由 Stephen Warren 提交于 
      do_test() currently uses strcmp() twice to determine which operator is
present; once to determine how many arguments the operator needs, then
a second time to actually decode the operator and implement it.

Rewrite the code so that a table lookup is used to translate the operator
string to an integer, and use a more efficient switch statement to decode
and execute the operator.

This approach also acts as enablement for the following patches.

This patch should introduce no behavioural change.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
      490ba833
    • S
      fs: don't pass NULL dev_desc to most filesystems · 377202b5
      由 Stephen Warren 提交于 
      FAT and ext4 expect that the passed in block device descriptor not be
NULL. This causes problems on sandbox, where get_device_and_partition()
succeeds for the "host" device, yet passes back a NULL device descriptor.
Add special handling for this situation, so that the generic filesystem
commands operate as expected on sandbox.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
      377202b5
    • S
      fs: implement infrastructure for an 'exists' function · 6152916a
      由 Stephen Warren 提交于 
      This could be used in scripts such as:

if test -e mmc 0:1 /boot/boot.scr; then
    load mmc 0:1 ${scriptaddr} /boot/boot.scr
    source ${scriptaddr}
fi

rather than:

if load mmc 0:1 ${scriptaddr} /boot/boot.scr; then
    source ${scriptaddr}
fi

This prevents errors being printed by attempts to load non-existent
files, which can be important when checking for a large set of files,
such as /boot/boot.scr.uimg, /boot/boot.scr, /boot/extlinux.conf,
/boot.scr.uimg, /boot.scr, /extlinux.conf.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NSimon Glass <sjg@chromium.org>
      6152916a
    • S
      fs: fix generic save command implementation · bd6fb31f
      由 Stephen Warren 提交于 
      Fix a few issues with the generic "save" shell command, and fs_write()
function.

1) fstypes[].write wasn't filled in for some file-systems, and isn't
   checked when used, which could cause crashes/... if executing save
   on e.g. fat/ext filesystems.

2) fs_write() requires the length argument to be non-zero, since it needs
   to know exactly how many bytes to write. Adjust the comments and code
   according to this.

3) fs_write() wasn't prototyped in <fs.h> like other generic functions;
   other code should be able to call this directly rather than invoking
   the "save" shell command.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NSimon Glass <sjg@chromium.org>
      bd6fb31f
    • S
      README: document CONFIG_CMD_FS_GENERIC · 16f4d933
      由 Stephen Warren 提交于 
      This enables generic filesystem commands such as load and ls, which
automatically work with multiple filesystem types, without having to
be told which is present, unlike e.g. ext2load, fatls.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
      16f4d933
  3. 18 2月, 2014 3 次提交
  5. 14 2月, 2014 2 次提交
  7. 13 2月, 2014 13 次提交
  9. 11 2月, 2014 2 次提交
  11. 10 2月, 2014 2 次提交
  13. 08 2月, 2014 9 次提交
  15. 07 2月, 2014 1 次提交