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pgmkdirp.c File Reference
#include "c.h"
#include <sys/stat.h>
Include dependency graph for pgmkdirp.c:

Go to the source code of this file.

Functions

int pg_mkdir_p (char *path, int omode)
 

Function Documentation

◆ pg_mkdir_p()

int pg_mkdir_p ( char *  path,
int  omode 
)

Definition at line 57 of file pgmkdirp.c.

58{
59 struct stat sb;
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 = strstr(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);
104 numask = oumask & ~(S_IWUSR | S_IXUSR);
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')
112 last = 1;
113 else if (p[0] != '/')
114 continue;
115 *p = '\0';
116 if (!last && p[1] == '\0')
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 {
125 if (!S_ISDIR(sb.st_mode))
126 {
127 if (last)
128 errno = EEXIST;
129 else
130 errno = ENOTDIR;
131 retval = -1;
132 break;
133 }
134 }
135 else if (mkdir(path, last ? omode : S_IRWXU | S_IRWXG | S_IRWXO) < 0)
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}
#define stat
Definition: win32_port.h:274
#define S_IRWXG
Definition: win32_port.h:300
#define S_IRWXO
Definition: win32_port.h:312
#define S_ISDIR(m)
Definition: win32_port.h:315
#define mkdir(a, b)
Definition: win32_port.h:80
#define S_IWUSR
Definition: win32_port.h:282
#define S_IXUSR
Definition: win32_port.h:285
#define S_IRWXU
Definition: win32_port.h:288

References mkdir, S_IRWXG, S_IRWXO, S_IRWXU, S_ISDIR, S_IWUSR, S_IXUSR, stat::st_mode, and stat.

Referenced by create_data_directory(), create_fullpage_directory(), create_output_directory(), create_xlog_or_symlink(), main(), recovery_create_dbdir(), StartLogStreamer(), TablespaceCreateDbspace(), and verify_dir_is_empty_or_create().