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059ec3d9 PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
0a49a7a4 | 5 | /* Copyright (c) University of Cambridge 1995 - 2009 */ |
f9ba5e22 | 6 | /* Copyright (c) The Exim Maintainers 2010 - 2018 */ |
059ec3d9 PH |
7 | /* See the file NOTICE for conditions of use and distribution. */ |
8 | ||
9 | #include "exim.h" | |
10 | ||
11 | ||
12 | /************************************************* | |
13 | * Attempt to create a directory * | |
14 | *************************************************/ | |
15 | ||
16 | /* All the directories that Exim ever creates for itself are within the spool | |
17 | directory as defined by spool_directory. We are prepared to create as many as | |
18 | necessary from that directory downwards, inclusive. However, directory creation | |
19 | can also be required in appendfile and sieve filters. The making function | |
20 | therefore has a parent argument, below which the new directories are to go. It | |
21 | can be NULL if the name is absolute. | |
22 | ||
23 | If a non-root uid has been specified for exim, and we are currently running as | |
24 | root, ensure the directory is owned by the non-root id if the parent is the | |
25 | spool directory. | |
26 | ||
27 | Arguments: | |
28 | parent parent directory name; if NULL the name must be absolute | |
29 | name directory name within the parent that we want | |
30 | mode mode for the new directory | |
31 | panic if TRUE, panic on failure | |
32 | ||
33 | Returns: panic on failure if panic is set; otherwise return FALSE; | |
34 | TRUE on success. | |
35 | */ | |
36 | ||
37 | BOOL | |
1ba28e2b PP |
38 | directory_make(const uschar *parent, const uschar *name, |
39 | int mode, BOOL panic) | |
059ec3d9 PH |
40 | { |
41 | BOOL use_chown = parent == spool_directory && geteuid() == root_uid; | |
424fa2f3 JH |
42 | uschar * p; |
43 | uschar c = 1; | |
059ec3d9 | 44 | struct stat statbuf; |
424fa2f3 | 45 | uschar * path; |
059ec3d9 | 46 | |
424fa2f3 | 47 | if (parent) |
059ec3d9 | 48 | { |
424fa2f3 JH |
49 | path = string_sprintf("%s%s%s", parent, US"/", name); |
50 | p = path + Ustrlen(parent); | |
059ec3d9 PH |
51 | } |
52 | else | |
53 | { | |
424fa2f3 JH |
54 | path = string_copy(name); |
55 | p = path + 1; | |
059ec3d9 PH |
56 | } |
57 | ||
424fa2f3 | 58 | /* Walk the path creating any missing directories */ |
059ec3d9 | 59 | |
424fa2f3 | 60 | while (c && *p) |
059ec3d9 | 61 | { |
424fa2f3 | 62 | while (*p && *p != '/') p++; |
059ec3d9 | 63 | c = *p; |
424fa2f3 JH |
64 | *p = '\0'; |
65 | if (Ustat(path, &statbuf) != 0) | |
059ec3d9 | 66 | { |
424fa2f3 JH |
67 | if (mkdir(CS path, mode) < 0 && errno != EEXIST) |
68 | { p = US"create"; goto bad; } | |
059ec3d9 PH |
69 | |
70 | /* Set the ownership if necessary. */ | |
71 | ||
b66fecb4 | 72 | if (use_chown && exim_chown(path, exim_uid, exim_gid)) |
424fa2f3 | 73 | { p = US"set owner on"; goto bad; } |
059ec3d9 PH |
74 | |
75 | /* It appears that any mode bits greater than 0777 are ignored by | |
76 | mkdir(), at least on some operating systems. Therefore, if the mode | |
77 | contains any such bits, do an explicit mode setting. */ | |
78 | ||
424fa2f3 | 79 | if (mode & 0777000) (void) Uchmod(path, mode); |
059ec3d9 PH |
80 | } |
81 | *p++ = c; | |
82 | } | |
83 | ||
84 | return TRUE; | |
424fa2f3 JH |
85 | |
86 | bad: | |
87 | if (panic) log_write(0, LOG_MAIN|LOG_PANIC_DIE, | |
88 | "Failed to %s directory \"%s\": %s\n", p, path, strerror(errno)); | |
89 | return FALSE; | |
059ec3d9 PH |
90 | } |
91 | ||
92 | /* End of directory.c */ |