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mkdir: Fix created directory permissions

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Previously, with -p, the specified directory and all of its parents
would be 0777&~filemask (regardless of the -m flag). POSIX says parent
directories must created as (0300|~filemask)&0777, and of course if -m
is set, the specified directory should be created with those
permissions.

Additionally, POSIX says that for symbolic_mode strings, + and - should
be interpretted relative to a default mode of 0777 (not 0).

Without -p, previously the directory would be created first with
0777&~filemask (before a chmod), but POSIX says that the directory shall
at no point in time have permissions less restrictive than the -m mode
argument.

Rather than dealing with mkdir removing the filemask bits by calling
chmod afterward, just clear the umask and remove the bits manually.
This commit is contained in:
Michael Forney 2016-12-14 19:40:06 -08:00 committed by Anselm R Garbe
parent 6ac5f01cc9
commit 529e50a7ad
4 changed files with 13 additions and 16 deletions
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6
libutil/mkdirp.c
View File

@ -7,7 +7,7 @@
#include "../util.h"
int
mkdirp(const char *path)
mkdirp(const char *path, mode_t mode, mode_t pmode)
{
char tmp[PATH_MAX], *p;
struct stat st;
@ -25,13 +25,13 @@ mkdirp(const char *path)
if (*p != '/')
continue;
*p = '\0';
if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST) {
if (mkdir(tmp, pmode) < 0 && errno != EEXIST) {
weprintf("mkdir %s:", tmp);
return -1;
}
*p = '/';
}
if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST) {
if (mkdir(tmp, mode) < 0 && errno != EEXIST) {
weprintf("mkdir %s:", tmp);
return -1;
}

19
mkdir.c
View File

@ -15,17 +15,18 @@ usage(void)
int
main(int argc, char *argv[])
{
mode_t mode = 0, mask;
int pflag = 0, mflag = 0, ret = 0;
mode_t mode, mask;
int pflag = 0, ret = 0;
mask = umask(0);
mode = 0777 & ~mask;
ARGBEGIN {
case 'p':
pflag = 1;
break;
case 'm':
mflag = 1;
mask = getumask();
mode = parsemode(EARGF(usage()), mode, mask);
mode = parsemode(EARGF(usage()), 0777, mask);
break;
default:
usage();
@ -36,16 +37,12 @@ main(int argc, char *argv[])
for (; *argv; argc--, argv++) {
if (pflag) {
if (mkdirp(*argv) < 0)
if (mkdirp(*argv, mode, 0777 & (~mask | 0300)) < 0)
ret = 1;
} else if (mkdir(*argv, S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
} else if (mkdir(*argv, mode) < 0) {
weprintf("mkdir %s:", *argv);
ret = 1;
}
if (mflag && chmod(*argv, mode) < 0) {
weprintf("chmod %s:", *argv);
ret = 1;
}
}
return ret;

2
tar.c
View File

@ -262,7 +262,7 @@ unarchive(char *fname, ssize_t l, char b[BLKSIZ])
weprintf("remove %s:", fname);
tmp = estrdup(fname);
mkdirp(dirname(tmp));
mkdirp(dirname(tmp), 0777, 0777);
free(tmp);
switch (h->type) {

2
util.h
View File

@ -75,6 +75,6 @@ long long strtonum(const char *, long long, long long, const char **);
long long enstrtonum(int, const char *, long long, long long);
long long estrtonum(const char *, long long, long long);
size_t unescape(char *);
int mkdirp(const char *);
int mkdirp(const char *, mode_t, mode_t);
#undef memmem
void *memmem(const void *, size_t, const void *, size_t);