What are the proper uses of MAXNAMLEN, NAME_MAX, and FILENAME_MAX?
Do they represent filenames with or without paths? Do they include
the terminating null or not? The source seems inconsistent:
[EMAIL PROTECTED]/usr/src] egrep -R '(MAXNAMLEN|NAME_MAX) ?\+ ?1' .
./bin/csh/file.c: Char name[MAXNAMLEN + 1], extended_name[MAXNAMLEN + 1];
./games/hunt/huntd/conf.c: char nm[MAXNAMLEN + 1];
./gnu/egcs/gcc/config/winnt/dirent.h: char d_name[MAXNAMLEN + 1];
./gnu/usr.bin/cvs/contrib/dirfns.shar:X char d_name[MAXNAMLEN + 1]; /* name
must be no longer than this */
./gnu/usr.bin/cvs/contrib/dirfns.shar:X char d_name[MAXNAMLEN + 1]; /* name
must be no longer than this */
./gnu/usr.bin/cvs/contrib/dirfns.shar:X ((sizeof (struct direct) -
(MAXNAMLEN+1)) + (((dp)->d_namlen+1 + 3) &~ 3))
./gnu/usr.bin/cvs/vms/ndir.h: char d_name[MAXNAMLEN+1]; /* name
of file */
./gnu/usr.bin/cvs/windows-NT/ndir.h: char d_name[MAXNAMLEN + 1]; /*
garentee null termination */
./gnu/usr.bin/gcc/gcc/config/i386/xm-djgpp.h: static char
fixed_path[FILENAME_MAX + 1]; \
./gnu/usr.bin/lynx/WWW/Library/Implementation/HTVMSUtils.c: char
d_name[255+1]; /* name (up to MAXNAMLEN + 1) */
./gnu/usr.bin/lynx/WWW/Library/Implementation/HTVMSUtils.c: * at least
MAXNAMLEN + 1 (more may be added for padding).
./gnu/usr.bin/lynx/WWW/Library/Implementation/HTVMSUtils.c:
(((sizeof(struct dirent) - (MAXNAMLEN+1) + ((dp)->d_namlen+1)) +3) & ~3)
./gnu/usr.bin/perl/doio.c: char newname[FILENAME_MAX+1];
./lib/csu/common.h:char __progname_storage[NAME_MAX+1];
./lib/csu/alpha/crt0.c:char __progname_storage[NAME_MAX+1];
./lib/csu/amd64/crt0.c:char __progname_storage[NAME_MAX+1];
./lib/csu/arm/crt0.c:char __progname_storage[NAME_MAX+1];
./lib/csu/hppa/crt0.c:char __progname_storage[NAME_MAX+1];
./lib/csu/i386/crt0.c:char __progname_storage[NAME_MAX+1];
./lib/csu/powerpc/crt0.c:char __progname_storage[NAME_MAX+1];
./lib/csu/sparc/crt0.c:char __progname_storage[NAME_MAX+1];
./lib/csu/sparc64/crt0.c:char __progname_storage[NAME_MAX+1];
./lib/csu/hppa64/crt0.c:char __progname_storage[NAME_MAX+1];
./lib/libc/gen/authenticate.c: char namebuf[MAXLOGNAME + 1 + NAME_MAX + 1];
./lib/libc/gen/authenticate.c: char namebuf[MAXLOGNAME + 1 + NAME_MAX + 1];
./lib/libc/gen/getcwd.c: if (bup + 3 + MAXNAMLEN + 1 >= eup) {
./lib/libc/sys/getdirentries.2:char d_name[MAXNAMLEN + 1]; /* see below */
./lib/libc/sys/.#getdirentries.2.1.19:char d_name[MAXNAMLEN + 1]; /* see
below */
./lib/libc/time/localtime.c: (2 * (MY_TZNAME_MAX +
1)))];
./lib/libssl/src/crypto/dso/dso_vms.c: char filename[FILENAME_MAX+1];
./lib/libssl/src/crypto/dso/dso_vms.c: char imagename[FILENAME_MAX+1];
./sbin/newfs/mkfs.c: u_char d_name[MAXNAMLEN + 1];
./share/man/man5/dir.5: char d_name[MAXNAMLEN + 1]; /* maximum name length
*/
./sys/compat/ibcs2/ibcs2_dirent.h: char d_name[IBCS2_MAXNAMLEN
+ 1];
./sys/compat/linux/linux_dirent.h: char d_name[LINUX_MAXNAMLEN
+ 1];
./sys/compat/linux/linux_dirent.h: char d_name[LINUX_MAXNAMLEN
+ 1];
./sys/compat/linux/linux_getcwd.c:#define DIRENT_MINSIZE (sizeof(struct dirent)
- (LINUX_MAXNAMLEN+1) + 4)
./sys/compat/netbsd/netbsd_getcwd.c:#define DIRENT_MINSIZE (sizeof(struct
dirent) - (MAXNAMLEN+1) + 4)
./sys/compat/sunos/sunos_dirent.h: char d_name[SUNOS_MAXNAMLEN
+ 1];
./sys/compat/svr4/svr4_dirent.h: char d_name[SVR4_MAXNAMLEN +
1];
./sys/compat/svr4/svr4_dirent.h: char d_name[SVR4_MAXNAMLEN +
1];
./sys/isofs/udf/udf_vnops.c: ((sizeof (struct dirent) - (MAXNAMLEN+1)) +
(((dp)->d_namlen+1 + 3) &~ 3))
./sys/nfs/nfs_vnops.c:#define NFS_DIRHDSIZ (sizeof (struct nfs_dirent) -
(MAXNAMLEN + 1))
./sys/stand/ls.c: if (((DP *)dp)->d_namlen > MAXNAMLEN+1)
{
./sys/sys/dir.h: ((sizeof (struct direct) - (MAXNAMLEN+1)) +
(((dp)->d_namlen+1 + 3) &~ 3))
./sys/sys/dirent.h: char d_name[MAXNAMLEN + 1]; /* name must be no
longer than this */
./sys/sys/dirent.h: ((sizeof (struct dirent) - (MAXNAMLEN+1)) +
(((dp)->d_namlen+1 + 3) &~ 3))
./sys/ufs/ufs/dir.h: char d_name[MAXNAMLEN + 1];/* name with length <=
MAXNAMLEN */
./sys/ufs/ufs/dir.h: ((sizeof(struct direct) - (MAXNAMLEN+1)) +
(((dp)->d_type+1 + 3) &~ 3)) : \
./sys/ufs/ufs/dir.h: ((sizeof(struct direct) - (MAXNAMLEN+1)) +
(((dp)->d_namlen+1 + 3) &~ 3)))
./sys/ufs/ufs/dir.h: ((sizeof(struct direct) - (MAXNAMLEN+1)) +
(((dp)->d_namlen+1 + 3) &~ 3))
./sys/ufs/ufs/dirhash.h:#define DH_NFSTATS (DIRECTSIZ(MAXNAMLEN + 1) /
DIRALIGN)
./sys/xfs/xfs_node-bsd.c: char name[MAXNAMLEN + 1];
./usr.bin/ar/archive.h: char name[MAXNAMLEN + 1]; /* name */
./usr.bin/ctags/tree.c: char nbuf[1+MAXNAMLEN+1];
./usr.bin/less/lsystem.c: char cwd[FILENAME_MAX+1];
./usr.bin/patch/patch.c:static char rejname[NAME_MAX + 1];
./usr.sbin/afs/src/nnpfs/bsd/nnpfs_node-bsd.c: char name[MAXNAMLEN + 1];
./usr.sbin/cron/database.c: char fname[MAXNAMLEN+1],
tabname[MAXNAMLEN];
./usr.sbin/dev_mkdb/dev_mkdb.c: u_char buf[MAXNAMLEN + 1];
./usr.sbin/lpr/common_source/lp.h: char q_name[MAXNAMLEN+1]; /*
control file name */
./usr.sbin/syslogd/syslogd.c: char prog[NAME_MAX+1];
./usr.sbin/syslogd/syslogd.c: char cline[LINE_MAX], prog[NAME_MAX+1], *p;
[EMAIL PROTECTED]/usr/src] egrep -R '(MAXNAMLEN|NAME_MAX)\]' .
./gnu/usr.bin/binutils/gas/config/tc-tic4x.c: char name[TIC4X_NAME_MAX];
/* Mnemonic of instruction. */
./gnu/usr.bin/binutils/gdb/go32-nat.c:static char child_cwd[FILENAME_MAX];
./gnu/usr.bin/binutils/ld/ldgram.y:static char *error_names[ERROR_NAME_MAX];
./gnu/usr.bin/cvs/emx/filesubr.c: char fn1[MAXNAMLEN], fn2[MAXNAMLEN];
./gnu/usr.sbin/mkhybrid/src/files.c: de->d_name[NAME_MAX]=0;
./gnu/usr.sbin/sendmail/sendmail/arpadate.c: static char b[43 + TZNAME_MAX];
./lib/libc/gen/ttyname.c:static char buf[TTY_NAME_MAX];
./lib/libc/time/localtime.c: char fullname[FILENAME_MAX];
./lib/libc/time/strftime.c: char filename[FILENAME_MAX];
./lib/libutil/uucplock.c: char lckname[sizeof(_PATH_UUCPLOCK) +
MAXNAMLEN],
./lib/libutil/uucplock.c: lcktmpname[sizeof(_PATH_UUCPLOCK) +
MAXNAMLEN];
./lib/libutil/uucplock.c: char lckname[sizeof(_PATH_UUCPLOCK) +
MAXNAMLEN];
./lib/libutil/uucplock.c: char tbuf[sizeof(_PATH_UUCPLOCK) + MAXNAMLEN];
./sbin/fsck_ext2fs/utilities.c: if (cp < &namebuf[EXT2FS_MAXNAMLEN])
./sbin/fsck_ffs/utilities.c: if (cp < &namebuf[MAXNAMLEN])
./sbin/isakmpd/ike_auth.c: char filename[FILENAME_MAX];
./sys/isofs/cd9660/cd9660_lookup.c: char altname[NAME_MAX];
./sys/ufs/ext2fs/ext2fs_dir.h: char e2d_name[EXT2FS_MAXNAMLEN];/* name
with length <= EXT2FS_MAXNAMLEN */
./usr.bin/mg/fileio.c: char user[LOGIN_NAME_MAX], path[MAXPATHLEN];
./usr.bin/mixerctl/mixerctl.c: char name[FIELD_NAME_MAX];
./usr.bin/mixerctl/mixerctl.c: char tmp[FIELD_NAME_MAX];
./usr.bin/tip/uucplock.c: char tbuf[sizeof(_PATH_LOCKDIRNAME) +
MAXNAMLEN];
./usr.bin/tip/uucplock.c: char tbuf[sizeof(_PATH_LOCKDIRNAME) +
MAXNAMLEN];
./usr.bin/tip/value.c: char file[FILENAME_MAX];
./usr.bin/wall/ttymsg.c: static char device[MAXNAMLEN] = _PATH_DEV;
./usr.bin/cvs/file.c: char ip_pat[MAXNAMLEN];
./usr.bin/cvs/file.c: char path[MAXPATHLEN], buf[MAXNAMLEN];
./usr.bin/cvs/resp.c: char newname[MAXNAMLEN], *file;
./usr.bin/cvs/status.c: char buf[MAXNAMLEN], fpath[MAXPATHLEN],
rcspath[MAXPATHLEN];
./usr.sbin/cron/database.c: char fname[MAXNAMLEN+1],
tabname[MAXNAMLEN];
./usr.sbin/lpr/common_source/displayq.c:static char current[NAME_MAX]; /*
current file being printed */
./usr.sbin/lpr/common_source/displayq.c:static char file[NAME_MAX]; /*
print file name */
./usr.sbin/lpr/common_source/rmjob.c:static char current[NAME_MAX];
/* active control file name */
./usr.sbin/lpr/lpd/printjob.c:static char jobname[NAME_MAX]; /* job
or file name */
./usr.sbin/lpr/lpd/recvjob.c:static char dfname[NAME_MAX]; /* data
files */
./usr.sbin/lpr/lpd/recvjob.c:static char tfname[NAME_MAX]; /* tmp
copy of cf before linking */
./usr.sbin/mopd/mopd/process.c: char filename[FILENAME_MAX];
./usr.sbin/syslogd/ttymsg.c: static char device[MAXNAMLEN] = _PATH_DEV;
./plusone.grep:./usr.sbin/cron/database.c: char
fname[MAXNAMLEN+1], tabname[MAXNAMLEN];
chdir(2) says:
[ENAMETOOLONG]
A component of a pathname exceeded {NAME_MAX} characters,
or an entire path name exceeded {PATH_MAX} characters.
dir(5) says:
/*
* A directory entry has a struct dirent at the front of it, containing
* its inode number, the length of the entry, and the length of the name
* contained in the entry. These are followed by the name padded to a 4
* byte boundary with null bytes. All names are guaranteed NUL terminated.
* The maximum length of a name in a directory is MAXNAMLEN.
*/
struct dirent {
u_int32_t d_fileno; /* file number of entry */
u_int16_t d_reclen; /* length of this record */
u_int8_t d_type; /* file type, see below */
u_int8_t d_namlen; /* length of string in d_name */
#define MAXNAMLEN 255
char d_name[MAXNAMLEN + 1]; /* maximum name length */
};
Can someone clarify? Thank you.
-Ray-
