1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
18 const char usage_fmt[] = "Usage: %s <mountpoint>\n";
19 #define INAME_LEN (PATH_MAX + 1)
21 #define CHECK_IT(exp, pstr) \
23 fprintf(stderr, "%s: at %s:%d: ", progname, __FILE__, __LINE__); \
28 #define CHECK_SNPRINTF(rc, len) \
29 CHECK_IT((rc) > 0 && (rc) <= (len), "snprintf() failed")
31 static char *get_iname(char *fname, const char *mtpt)
37 iname = malloc(INAME_LEN);
38 CHECK_IT(iname, "malloc() failed");
40 fd = open(fname, O_CREAT, 0644);
41 if (fd < 0 && errno != EISDIR) {
42 fprintf(stderr, "%s:%d: open(%s) failed: %s\n", __FILE__,
43 __LINE__, fname, strerror(errno));
50 rc = stat(fname, &buf);
52 fprintf(stderr, "%s:%d: stat(%s) failed: %s\n", __FILE__,
53 __LINE__, fname, strerror(errno));
57 rc = snprintf(iname, INAME_LEN,
58 "%s/__iopen__/%lu", mtpt, (unsigned long)buf.st_ino);
59 CHECK_SNPRINTF(rc, INAME_LEN);
64 int main(int argc, char *argv[])
66 char *fname, *mtpt, *pname;
67 char *fname_iname, *dir;
68 char *dir_iname = NULL, *foo = NULL, *bar = NULL;
69 int rc, fd, i, thread = 0;
72 pname = strdup(argv[0]);
73 progname = basename(argv[0]);
76 fprintf(stderr, usage_fmt, progname);
80 for (i = 1; i <= 10; i++) {
83 fprintf(stderr, "error: %s: #%d - %s\n", argv[0], i,
84 strerror(rc = errno));
90 printf("%s: thread #%d (PID %d) started\n", argv[0], i, rc);
97 fname = malloc(INAME_LEN);
98 CHECK_IT(fname, "malloc() failed");
100 rc = snprintf(fname, INAME_LEN,
101 "%s/%d", mtpt, getpid());
102 CHECK_SNPRINTF(rc, INAME_LEN);
104 rc = mkdir(fname, 0644);
106 fprintf(stderr, "%s:%d: mkdir(%s) failed: %s\n",
107 __FILE__, __LINE__, fname, strerror(errno));
111 fname_iname = get_iname(fname, mtpt);
113 dir = malloc(INAME_LEN);
114 CHECK_IT(dir, "malloc() failed");
116 rc = snprintf(dir, INAME_LEN, "%s/dir", fname_iname);
117 CHECK_SNPRINTF(rc, INAME_LEN);
119 foo = malloc(INAME_LEN);
120 CHECK_IT(foo, "malloc() failed");
122 bar = malloc(INAME_LEN);
123 CHECK_IT(bar, "malloc() failed");
125 for (i = 0; i < 1000; i++) {
126 rc = mkdir(dir, 0644);
128 fprintf(stderr, "%s:%d: mkdir(%s) failed: %s\n",
129 __FILE__, __LINE__, dir,
134 dir_iname = get_iname(dir, mtpt);
136 rc = snprintf(foo, INAME_LEN, "%s/bar", dir_iname);
137 CHECK_SNPRINTF(rc, INAME_LEN);
139 rc = snprintf(bar, INAME_LEN, "%s/bar", dir_iname);
140 CHECK_SNPRINTF(rc, INAME_LEN);
142 fd = open(foo, O_CREAT, 0644);
144 fprintf(stderr, "%s:%d: open(%s) failed: %s\n",
145 __FILE__, __LINE__, foo,
151 fprintf(stderr, "%s:%d: close() failed: %s\n",
152 __FILE__, __LINE__, strerror(errno));
156 rc = rename(foo, bar);
158 fprintf(stderr, "%s:%d: rename(%s, %s) failed: "
159 "%s\n", __FILE__, __LINE__, foo, bar,
166 fprintf(stderr, "%s:%d: unlink(%s) failed: "
167 "%s\n", __FILE__, __LINE__, bar,
173 fprintf(stderr, "%s:%d: rmdir(%s) failed: %s\n",
174 __FILE__, __LINE__, dir,
182 for ( i=0; i<10; i++)
183 waitpid(pidlist[i], NULL, 0);