1 #include <ccan/talloc/talloc.h>
2 #include <ccan/grab_file/grab_file.h>
3 #include <ccan/noerr/noerr.h>
4 #include <ccan/read_write_all/read_write_all.h>
5 #include <ccan/noerr/noerr.h>
19 static char *tmpdir = NULL;
20 static unsigned int count;
23 const unsigned int default_timeout_ms = 10 * 60 * 1000;
25 char *talloc_basename(const void *ctx, const char *dir)
27 char *p = strrchr(dir, '/');
31 return talloc_strdup(ctx, p+1);
34 char *talloc_dirname(const void *ctx, const char *dir)
36 char *p = strrchr(dir, '/');
39 return talloc_strdup(ctx, ".");
40 return talloc_strndup(ctx, dir, p - dir);
43 char *talloc_getcwd(const void *ctx)
48 /* *This* is why people hate C. */
50 cwd = talloc_array(ctx, char, len);
51 while (!getcwd(cwd, len)) {
52 if (errno != ERANGE) {
56 cwd = talloc_realloc(ctx, cwd, char, len *= 2);
61 static void killme(int sig)
63 kill(-getpid(), SIGKILL);
66 char *run_with_timeout(const void *ctx, const char *cmd,
67 bool *ok, unsigned *timeout_ms)
73 struct timeval start, end;
77 return talloc_asprintf(ctx, "Failed to create pipe: %s",
80 gettimeofday(&start, NULL);
85 return talloc_asprintf(ctx, "Failed to fork: %s",
91 struct itimerval itim;
93 if (dup2(p[1], STDOUT_FILENO) != STDOUT_FILENO
94 || dup2(p[1], STDERR_FILENO) != STDERR_FILENO
96 || close(STDIN_FILENO) != 0
97 || open("/dev/null", O_RDONLY) != STDIN_FILENO)
100 signal(SIGALRM, killme);
101 itim.it_interval.tv_sec = itim.it_interval.tv_usec = 0;
102 itim.it_value.tv_sec = *timeout_ms / 1000;
103 itim.it_value.tv_usec = (*timeout_ms % 1000) * 1000;
104 setitimer(ITIMER_REAL, &itim, NULL);
106 status = system(cmd);
107 if (WIFEXITED(status))
108 exit(WEXITSTATUS(status));
109 /* Here's a hint... */
110 exit(128 + WTERMSIG(status));
114 ret = grab_fd(ctx, p[0], NULL);
115 /* This shouldn't fail... */
116 if (waitpid(pid, &status, 0) != pid)
117 err(1, "Failed to wait for child");
119 gettimeofday(&end, NULL);
120 if (end.tv_usec < start.tv_usec) {
121 end.tv_usec += 1000000;
124 ms = (end.tv_sec - start.tv_sec) * 1000
125 + (end.tv_usec - start.tv_usec) / 1000;
126 if (ms > *timeout_ms)
131 *ok = (WIFEXITED(status) && WEXITSTATUS(status) == 0);
135 /* Returns output if command fails. */
136 char *run_command(const void *ctx, unsigned int *time_ms, const char *fmt, ...)
139 char *cmd, *contents;
141 unsigned int default_time = default_timeout_ms;
144 time_ms = &default_time;
145 else if (*time_ms == 0)
146 return talloc_strdup(ctx, "\n== TIMED OUT ==\n");
149 cmd = talloc_vasprintf(ctx, fmt, ap);
152 contents = run_with_timeout(ctx, cmd, &ok, time_ms);
154 talloc_free(contents);
159 err(1, "Problem running child");
161 contents = talloc_asprintf_append(contents,
162 "\n== TIMED OUT ==\n");
166 static int unlink_all(char *dir)
168 char cmd[strlen(dir) + sizeof("rm -rf ")];
169 sprintf(cmd, "rm -rf %s", dir);
170 if (system(cmd) != 0)
171 warn("Could not remove temporary work in %s", dir);
175 char *temp_file(const void *ctx, const char *extension)
177 /* For first call, create dir. */
179 tmpdir = getenv("TMPDIR");
182 tmpdir = talloc_asprintf(talloc_autofree_context(),
183 "%s/ccanlint-%u.%lu",
184 tmpdir, getpid(), random());
185 if (mkdir(tmpdir, 0700) != 0) {
186 if (errno == EEXIST) {
191 err(1, "mkdir %s failed", tmpdir);
193 talloc_set_destructor(tmpdir, unlink_all);
196 return talloc_asprintf(ctx, "%s/%u%s", tmpdir, count++, extension);
199 char *maybe_temp_file(const void *ctx, const char *extension, bool keep,
205 return temp_file(ctx, extension);
207 baselen = strrchr(srcname, '.') - srcname;
208 return talloc_asprintf(ctx, "%.*s%s", baselen, srcname, extension);
211 bool move_file(const char *oldname, const char *newname)
218 /* Simple case: rename works. */
219 if (rename(oldname, newname) == 0)
222 /* Try copy and delete: not atomic! */
223 contents = grab_file(NULL, oldname, &size);
227 fd = open(newname, O_WRONLY|O_CREAT|O_TRUNC, 0666);
233 ret = write_all(fd, contents, size);
243 talloc_free(contents);