Mercurial > hg > octave-lojdl > gnulib-hg
changeset 15314:517a0b73b86b
stat: be robust to PATH_MAX definition
Make this stack-allocation of PATH_MAX bytes more robust.
* lib/stat.c (rpl_stat): Require reasonable PATH_MAX.
* modules/stat (Depends-on): Add verify.
Signed-off-by: Eric Blake <eblake@redhat.com>
| author | Eric Blake <eblake@redhat.com> |
|---|---|
| date | Mon, 20 Jun 2011 16:55:24 -0600 |
| parents | 8dfa469e2ba8 |
| children | 94b3a0b47189 |
| files | ChangeLog lib/stat.c modules/stat |
| diffstat | 3 files changed, 13 insertions(+), 0 deletions(-) [+] |
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--- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,9 @@ 2011-06-22 Eric Blake <eblake@redhat.com> + stat: be robust to PATH_MAX definition + * lib/stat.c (rpl_stat): Require reasonable PATH_MAX. + * modules/stat (Depends-on): Add verify. + link: work around IRIX bug * m4/link.m4 (gl_FUNC_LINK): Expose the bug. * lib/link.c (rpl_link): Work around it.
--- a/lib/stat.c +++ b/lib/stat.c @@ -38,6 +38,7 @@ #include <stdbool.h> #include <string.h> #include "dosname.h" +#include "verify.h" /* Store information about NAME into ST. Work around bugs with trailing slashes. Mingw has other bugs (such as st_ino always @@ -63,6 +64,12 @@ } #endif /* REPLACE_FUNC_STAT_FILE */ #if REPLACE_FUNC_STAT_DIR + /* The only known systems where REPLACE_FUNC_STAT_DIR is needed also + have a constant PATH_MAX. */ +# ifndef PATH_MAX +# error "Please port this replacement to your platform" +# endif + if (result == -1 && errno == ENOENT) { /* Due to mingw's oddities, there are some directories (like @@ -77,6 +84,7 @@ char fixed_name[PATH_MAX + 1] = {0}; size_t len = strlen (name); bool check_dir = false; + verify (PATH_MAX <= 4096); if (PATH_MAX <= len) errno = ENAMETOOLONG; else if (len)