xref: /minix3/minix/tests/test78.c (revision 433d6423c39e34ec4b79c950597bb2d236f886be)
1 /* Test for getdents().
2  * Just tests whatever FS the test is executed from.
3  *
4  * This test creates lots of nodes of various types, verifies that readdir()
5  * (and so getdents()) returns all of them exactly once, and nothing else
6  * (except for "." and ".."), and verifies the struct dirents are correct.
7  */
8 
9 #include <sys/types.h>
10 #include <sys/stat.h>
11 
12 #include <stdlib.h>
13 #include <stdio.h>
14 #include <string.h>
15 #include <dirent.h>
16 #include <fcntl.h>
17 #include <unistd.h>
18 
19 #include "common.h"
20 
21 #define FILETYPES	6
22 
23 #define LOOPS	30
24 
25 struct filetype {
26 	char *fnbase;	/* type-unique base name */
27 	int dt;		/* dirent type that getdents() should return */
28 	mode_t modebit;	/* mode bit unique to this type */
29 } filetypes[FILETYPES] = {
30 	{ "fifo",	DT_FIFO, S_IFIFO },
31 	{ "chr",	DT_CHR,  S_IFCHR },
32 	{ "dir",	DT_DIR,  S_IFDIR },
33 	{ "blk",	DT_BLK,	 S_IFBLK },
34 	{ "reg",	DT_REG,  S_IFREG },
35 	{ "lnk",	DT_LNK,  S_IFLNK },
36 };
37 
38 int seen[FILETYPES][LOOPS];
39 
40 /* create a node named 'f' using code 'call'. check it doesn't exist
41  * before hand, and does exist afterwards, and has the expected modebit.
42  */
43 
44 #define CR(f, call, modebit) do { 			\
45 	struct stat sb;					\
46 	if(lstat(f, &sb) >= 0) { e(1); }		\
47 	if((call) < 0) { e(2); } 			\
48 	if(lstat(f, &sb) < 0) { e(3); }			\
49 	if(!(sb.st_mode & (modebit))) { e(4); }		\
50 } while(0)
51 
52 int
main(int argc,char ** argv)53 main(int argc, char **argv)
54 {
55 	int i, t;
56 	DIR *dir;
57 	struct dirent *de;
58 
59 	start(78);
60 
61 	/* create contents */
62 
63 	for(i = 0; i < LOOPS; i++) {
64 		for(t = 0; t < FILETYPES; t++) {
65 			int c;
66 			char fn[2000];
67 			mode_t m = filetypes[t].modebit;
68 
69 			/* think of a filename; do varying lengths to check
70 			 * dirent record length alignment issues
71 			 */
72 
73 			snprintf(fn, sizeof(fn), "%d.%d.%d.", t, filetypes[t].dt, i);
74 			for(c = 0; c < i; c++) strcat(fn, "x");
75 
76 			/* create the right type */
77 
78 			switch(filetypes[t].dt) {
79 			  case DT_FIFO: CR(fn, mknod(fn, 0600|S_IFIFO, 0), m); break;
80 			  case DT_CHR:  CR(fn, mknod(fn, 0600|S_IFCHR, 0), m); break;
81 			  case DT_BLK:  CR(fn, mknod(fn, 0600|S_IFBLK, 0), m); break;
82 			  case DT_REG:  CR(fn, mknod(fn, 0600|S_IFREG, 0), m); break;
83 			  case DT_DIR:  CR(fn, mkdir(fn, 0600), m); break;
84 			  case DT_LNK:  CR(fn, symlink("dest", fn), m); break;
85 			  default: e(10); break;
86 			}
87 		}
88 	}
89 
90 	/* Verify that readdir() returns dirent structs with reasonable contents */
91 
92 	if(!(dir = opendir("."))) { e(20); return 1; }
93 
94 	while((de = readdir(dir))) {
95 		int dt;
96 		struct stat sb;
97 
98 		if(!strcmp(de->d_name, ".")) continue;
99 		if(!strcmp(de->d_name, "..")) continue;
100 
101 		if(sscanf(de->d_name, "%d.%d.%d", &t, &dt, &i) != 3) {
102 			e(30);
103 			continue;
104 		}
105 
106 		/* sanity check on filename numbers */
107 
108 		if(t < 0 || dt < 0 || i < 0) { e(31); continue; }
109 		if(t >= FILETYPES || i >= LOOPS) { e(32); continue; }
110 		if(seen[t][i]) { e(33); continue; }
111 		seen[t][i] = 1;
112 		if(filetypes[t].dt != dt) { e(34); continue; }
113 		if(lstat(de->d_name, &sb) < 0) { e(35); continue; }
114 		if(!(sb.st_mode & filetypes[t].modebit)) { e(36); continue; }
115 
116 		/* Now we know this file is ours and has the expected type;
117 		 * now we can verify the contents of the dirent struct. d_name
118 		 * is OK because sscanf and stat worked on it.
119 		 */
120 
121 		if(de->d_type != dt) { e(37); }
122 		if(de->d_fileno != sb.st_ino) { e(38); }
123 		if(de->d_namlen != strlen(de->d_name)) { e(39); }
124 		if(de->d_reclen != _DIRENT_RECLEN(de, de->d_namlen)) { e(40); }
125 	}
126 
127 	if(closedir(dir) < 0) e(50);
128 
129 	/* Verify that we have seen all files we expected to see. */
130 
131 	for(i = 0; i < LOOPS; i++) {
132 		for(t = 0; t < FILETYPES; t++) {
133 			if(!seen[t][i]) { e(60); break; }
134 		}
135 	}
136 
137 	quit();
138 }
139