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annotate rvinterf/include/ffslimits.h @ 433:2d8ab1b0df8d

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rvinterf/doc/tfc139.usage: written doc/Compal-unlock: typo fix
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Sun, 22 Jun 2014 00:17:44 +0000
parents 3dd74b16df82
children
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3dd74b16df82 fc-fsio: pathname recursion handling revamped
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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1 /*
3dd74b16df82 fc-fsio: pathname recursion handling revamped
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2 * Limits on FFS filenames and pathnames
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3 *
3dd74b16df82 fc-fsio: pathname recursion handling revamped
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4 * The deepest pathname allowed is one of the form /1/2/3/4/5/6, where the
3dd74b16df82 fc-fsio: pathname recursion handling revamped
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5 * last component may be a file, a directory or a symlink; if this last
3dd74b16df82 fc-fsio: pathname recursion handling revamped
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6 * component is a directory, it has to be empty, because any child of
3dd74b16df82 fc-fsio: pathname recursion handling revamped
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7 * that directory would violate the depth limit.
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8 *
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9 * The proper FFS pathname form begins with a slash (all pathnames must
3dd74b16df82 fc-fsio: pathname recursion handling revamped
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10 * be absolute, no Unix processes in the fw means no current directories),
3dd74b16df82 fc-fsio: pathname recursion handling revamped
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11 * has exactly one slash in each separating place (no double slashes),
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12 * and no trailing slash except in the special case of the root directory,
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13 * whose full pathname is "/".
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14 *
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15 * Each component name is [1,20] characters long; combining this limit
3dd74b16df82 fc-fsio: pathname recursion handling revamped
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16 * with the maximum depth of 6 puts the maximum length of a properly-formed
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17 * full pathname at 126 characters.
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18 */
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19
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20 #define MAX_FN_COMPONENT 20
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21 #define MAX_NAME_DEPTH 6
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22 #define MAX_FULL_PATHNAME ((MAX_FN_COMPONENT+1) * MAX_NAME_DEPTH)