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| author | mikeh <mikeh@FreeBSD.org> | 2001-07-29 00:52:37 +0000 |
|---|---|---|
| committer | mikeh <mikeh@FreeBSD.org> | 2001-07-29 00:52:37 +0000 |
| commit | b925de092b1a33961fdd0e75d235854989006ed8 (patch) | |
| tree | e6d5842b2c36ce1aaf0b631a9291c734c7cb9d3e /lib/libc/gen/glob.3 | |
| parent | b9208b18d5d6f747062fbda0a70c27212711ab0a (diff) | |
| download | FreeBSD-src-b925de092b1a33961fdd0e75d235854989006ed8.zip FreeBSD-src-b925de092b1a33961fdd0e75d235854989006ed8.tar.gz | |
Rename the GLOB_MAXPATH flag of glob(3) to GLOB_LIMIT to be compatible
with NetBSD and OpenBSD. glob(3) will now return GLOB_NOSPACE with
errno set to 0 instead of GLOB_LIMIT when we match more than `gl_matchc'
patterns. GLOB_MAXPATH has been left as an alias of GLOB_LIMIT to
maintain backwards compatibility.
Reviewed by: sheldonh, assar
Obtained from: NetBSD/OpenBSD
Diffstat (limited to 'lib/libc/gen/glob.3')
| -rw-r--r-- | lib/libc/gen/glob.3 | 33 |
1 files changed, 16 insertions, 17 deletions
diff --git a/lib/libc/gen/glob.3 b/lib/libc/gen/glob.3 index 5c2da21..fcbb90f 100644 --- a/lib/libc/gen/glob.3 +++ b/lib/libc/gen/glob.3 @@ -260,14 +260,15 @@ character, avoiding any special interpretation of the character. Expand patterns that start with .Ql ~ to user name home directories. -.It Dv GLOB_MAXPATH +.It Dv GLOB_LIMIT Limit the total number of returned pathnames to the value provided in -.Fa gl_matchc . -If -.Fn glob -would match more pathnames, -.Dv GLOB_LIMIT -will be returned. +.Fa gl_matchc +(default ARG_MAX). +This option should be set for programs +that can be coerced into a denial of service attack +via patterns that expand to a very large number of matches, +such as a long string of +.Ql */../*/.. . .El .Pp If, during the search, a directory is encountered that cannot be opened @@ -377,21 +378,19 @@ file .Aq Pa glob.h : .Bl -tag -width GLOB_NOCHECK .It Dv GLOB_NOSPACE -An attempt to allocate memory failed. +An attempt to allocate memory failed, or if +.Fa errno +was 0 +.Dv GLOB_LIMIT +was specified in the flags and +.Fa pglob\->gl_matchc +or more patterns were patched. .It Dv GLOB_ABEND The scan was stopped because an error was encountered and either .Dv GLOB_ERR was set or .Fa \*(lp*errfunc\*(rp\*(lp\*(rp returned non-zero. -.It Dv GLOB_LIMIT -The flag -.Dv GLOB_MAXPATH -was provided, and the specified limit passed to -.Fn glob -in -.Fa pglob\->gl_matchc -was reached. .El .Pp The arguments @@ -427,8 +426,8 @@ compatible with the exception that the flags .Dv GLOB_ALTDIRFUNC , .Dv GLOB_BRACE , +.Dv GLOB_LIMIT , .Dv GLOB_MAGCHAR , -.Dv GLOB_MAXPATH , .Dv GLOB_NOMAGIC , .Dv GLOB_QUOTE , and |
