recurse.c - sbase - suckless unix tools | |
git clone git://git.suckless.org/sbase | |
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recurse.c (2454B) | |
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1 /* See LICENSE file for copyright and license details. */ | |
2 #include <dirent.h> | |
3 #include <errno.h> | |
4 #include <fcntl.h> | |
5 #include <limits.h> | |
6 #include <stdio.h> | |
7 #include <stdlib.h> | |
8 #include <string.h> | |
9 #include <sys/stat.h> | |
10 #include <sys/types.h> | |
11 #include <unistd.h> | |
12 | |
13 #include "../fs.h" | |
14 #include "../util.h" | |
15 | |
16 int recurse_status = 0; | |
17 | |
18 void | |
19 recurse(int dirfd, const char *name, void *data, struct recursor *r) | |
20 { | |
21 struct dirent *d; | |
22 struct history *new, *h; | |
23 struct stat st, dst; | |
24 DIR *dp; | |
25 int flags = 0, fd; | |
26 size_t pathlen = r->pathlen; | |
27 | |
28 if (dirfd == AT_FDCWD) | |
29 pathlen = estrlcpy(r->path, name, sizeof(r->path)); | |
30 | |
31 if (r->follow == 'P' || (r->follow == 'H' && r->depth)) | |
32 flags |= AT_SYMLINK_NOFOLLOW; | |
33 | |
34 if (fstatat(dirfd, name, &st, flags) < 0) { | |
35 if (!(r->flags & SILENT)) { | |
36 weprintf("stat %s:", r->path); | |
37 recurse_status = 1; | |
38 } | |
39 return; | |
40 } | |
41 if (!S_ISDIR(st.st_mode)) { | |
42 r->fn(dirfd, name, &st, data, r); | |
43 return; | |
44 } | |
45 | |
46 new = emalloc(sizeof(struct history)); | |
47 new->prev = r->hist; | |
48 r->hist = new; | |
49 new->dev = st.st_dev; | |
50 new->ino = st.st_ino; | |
51 | |
52 for (h = new->prev; h; h = h->prev) | |
53 if (h->ino == st.st_ino && h->dev == st.st_dev) | |
54 return; | |
55 | |
56 if (!r->depth && (r->flags & DIRFIRST)) | |
57 r->fn(dirfd, name, &st, data, r); | |
58 | |
59 if (!r->maxdepth || r->depth + 1 < r->maxdepth) { | |
60 fd = openat(dirfd, name, O_RDONLY | O_CLOEXEC | O_DIRECT… | |
61 if (fd < 0) { | |
62 weprintf("open %s:", r->path); | |
63 recurse_status = 1; | |
64 } | |
65 if (!(dp = fdopendir(fd))) { | |
66 if (!(r->flags & SILENT)) { | |
67 weprintf("fdopendir:"); | |
68 recurse_status = 1; | |
69 } | |
70 return; | |
71 } | |
72 if (r->path[pathlen - 1] != '/') | |
73 r->path[pathlen++] = '/'; | |
74 if (r->follow == 'H') | |
75 flags |= AT_SYMLINK_NOFOLLOW; | |
76 while ((d = readdir(dp))) { | |
77 if (!strcmp(d->d_name, ".") || !strcmp(d->d_name… | |
78 continue; | |
79 r->pathlen = pathlen + estrlcpy(r->path + pathle… | |
80 if (fstatat(fd, d->d_name, &dst, flags) < 0) { | |
81 if (!(r->flags & SILENT)) { | |
82 weprintf("stat %s:", r->path); | |
83 recurse_status = 1; | |
84 } | |
85 } else if ((r->flags & SAMEDEV) && dst.st_dev !=… | |
86 continue; | |
87 } else { | |
88 r->depth++; | |
89 r->fn(fd, d->d_name, &dst, data, r); | |
90 r->depth--; | |
91 } | |
92 } | |
93 r->path[pathlen - 1] = '\0'; | |
94 r->pathlen = pathlen - 1; | |
95 closedir(dp); | |
96 } | |
97 | |
98 if (!r->depth) { | |
99 if (!(r->flags & DIRFIRST)) | |
100 r->fn(dirfd, name, &st, data, r); | |
101 | |
102 while (r->hist) { | |
103 h = r->hist; | |
104 r->hist = r->hist->prev; | |
105 free(h); | |
106 } | |
107 } | |
108 } |