58{
60 mode_t numask,
61 oumask;
62 int last,
63 retval;
64 char *p;
65
66 retval = 0;
67 p = path;
68
69#ifdef WIN32
70 /* skip network and drive specifiers for win32 */
71 if (strlen(p) >= 2)
72 {
73 if (p[0] == '/' && p[1] == '/')
74 {
75 /* network drive */
76 p = strchr(p + 2, '/');
77 if (p == NULL)
78 {
79 errno = EINVAL;
80 return -1;
81 }
82 }
83 else if (p[1] == ':' &&
84 ((p[0] >= 'a' && p[0] <= 'z') ||
85 (p[0] >= 'A' && p[0] <= 'Z')))
86 {
87 /* local drive */
88 p += 2;
89 }
90 }
91#endif
92
93 /*
94 * POSIX 1003.2: For each dir operand that does not name an existing
95 * directory, effects equivalent to those caused by the following command
96 * shall occur:
97 *
98 * mkdir -p -m $(umask -S),u+wx $(dirname dir) && mkdir [-m mode] dir
99 *
100 * We change the user's umask and then restore it, instead of doing
101 * chmod's. Note we assume umask() can't change errno.
102 */
103 oumask = umask(0);
105 (void) umask(numask);
106
107 if (p[0] == '/') /* Skip leading '/'. */
108 ++p;
109 for (last = 0; !last; ++p)
110 {
111 if (p[0] == '0円')
112 last = 1;
113 else if (p[0] != '/')
114 continue;
115 *p = '0円';
116 if (!last && p[1] == '0円')
117 last = 1;
118
119 if (last)
120 (void) umask(oumask);
121
122 /* check for pre-existing directory */
123 if (
stat(path, &sb) == 0)
124 {
126 {
127 if (last)
128 errno = EEXIST;
129 else
130 errno = ENOTDIR;
131 retval = -1;
132 break;
133 }
134 }
136 {
137 retval = -1;
138 break;
139 }
140 if (!last)
141 *p = '/';
142 }
143
144 /* ensure we restored umask */
145 (void) umask(oumask);
146
147 return retval;
148}