Hi!
> The underlying functions by which the AppArmor LSM hooks are implemented.
>
> Signed-off-by: John Johansen <[email protected]>
> Signed-off-by: Andreas Gruenbacher <[email protected]>
> +#include "inline.h"
Select a better name for include?
> +static inline void aa_permerror2result(int perm_result, struct aa_audit *sa)
Betternameoffunction?
> +/**
> + * mangle -- escape special characters in str
> + * @str: string to escape
> + * @buffer: buffer containing str
> + *
> + * Escape special characters in @str, which is contained in @buffer. @str must
> + * be aligned to the end of the buffer, and the space between @buffer and @str
> + * may be used for escaping.
> + *
> + * Returns @str if no escaping was necessary, a pointer to the beginning of the
> + * escaped string, or NULL if there was not enough space in @buffer. When
> + * called with a NULL buffer, the return value tells whether any escaping is
> + * necessary.
> + */
> +static const char *mangle(const char *str, char *buffer)
> +{
> + static const char c_escape[] = {
> + ['\a'] = 'a', ['\b'] = 'b',
> + ['\f'] = 'f', ['\n'] = 'n',
> + ['\r'] = 'r', ['\t'] = 't',
> + ['\v'] = 'v',
> + [' '] = ' ', ['\\'] = '\\',
> + };
> + const char *s;
> + char *t, c;
> +
> +#define mangle_escape(c) \
> + unlikely((unsigned char)(c) < ARRAY_SIZE(c_escape) && \
> + c_escape[(unsigned char)c])
> +
> + for (s = (char *)str; (c = *s) != '\0'; s++)
> + if (mangle_escape(c))
> + goto escape;
> + return str;
> +
> +escape:
> + if (!buffer)
> + return NULL;
> + for (s = str, t = buffer; (c = *s) != '\0'; s++) {
> + if (mangle_escape(c)) {
> + if (t == s)
> + return NULL;
> + *t++ = '\\';
> + *t++ = c_escape[(unsigned char)c];
> + } else
> + *t++ = c;
> + }
> + *t++ = '\0';
> +
> +#undef mangle_escape
> +
> + return buffer;
> +}
I do not think we want this in kernel.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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