SUID bit???

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SUID bit???

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==, al, ant, attributes, bit, bitwise, ca, char, check, clear, code, constant, file, file attributes, filename, form, ge, mask, octal, printf, programming, set, stat, struct, suid, symbolic, \n

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09-28-2001

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SUID bit???

Hi all

I'm getting file info through stat( char *filename, struct stat *buf)

Taking all the file attributes to buf->st_mode,
How can i check the suid bit in there, if suid bit mask is 0004000??

Thank you all

solvman

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09-28-2001

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Use the symbolic name rather than the octal constant. And use a bitwise "and":

Code:

if (buf->stmode & S_ISUID) {
     printf{"suid bit set\n");
} else {
     printf("suid bit clear\n");
}

Some people don't like that form and think this is more clear:
if ((buf->stmode & S_ISUID) == S_ISUID)

Perderabo

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