S_IRGRP | S_IWGRP);
if (fd < 0) {
PERROR("open lock file %s", filepath);
- ret = -1;
+ fd = -1;
goto error;
}
goto error;
}
- flags = O_WRONLY | O_CREAT | O_TRUNC;
+ /*
+ * With the session rotation feature on the relay, we might need to seek
+ * and truncate a tracefile, so we need read and write access.
+ */
+ flags = O_RDWR | O_CREAT | O_TRUNC;
/* Open with 660 mode */
mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;
return ret;
}
+/**
+ * Parse a string that represents a time in human readable format. It
+ * supports decimal integers suffixed by 's', 'u', 'm', 'us', and 'ms'.
+ *
+ * The suffix multiply the integer by:
+ * 'u'/'us': 1
+ * 'm'/'ms': 1000
+ * 's': 1000000
+ *
+ * Note that unit-less numbers are assumed to be microseconds.
+ *
+ * @param str The string to parse, assumed to be NULL-terminated.
+ * @param time_us Pointer to a uint64_t that will be filled with the
+ * resulting time in microseconds.
+ *
+ * @return 0 on success, -1 on failure.
+ */
+LTTNG_HIDDEN
+int utils_parse_time_suffix(char const * const str, uint64_t * const time_us)
+{
+ int ret;
+ uint64_t base_time;
+ long multiplier = 1;
+ const char *str_end;
+ char *num_end;
+
+ if (!str) {
+ DBG("utils_parse_time_suffix: received a NULL string.");
+ ret = -1;
+ goto end;
+ }
+
+ /* strtoull will accept a negative number, but we don't want to. */
+ if (strchr(str, '-') != NULL) {
+ DBG("utils_parse_time_suffix: invalid time string, should not contain '-'.");
+ ret = -1;
+ goto end;
+ }
+
+ /* str_end will point to the \0 */
+ str_end = str + strlen(str);
+ errno = 0;
+ base_time = strtoull(str, &num_end, 10);
+ if (errno != 0) {
+ PERROR("utils_parse_time_suffix strtoull on string \"%s\"", str);
+ ret = -1;
+ goto end;
+ }
+
+ if (num_end == str) {
+ /* strtoull parsed nothing, not good. */
+ DBG("utils_parse_time_suffix: strtoull had nothing good to parse.");
+ ret = -1;
+ goto end;
+ }
+
+ /* Check if a prefix is present. */
+ switch (*num_end) {
+ case 'u':
+ multiplier = 1;
+ /* Skip another letter in the 'us' case. */
+ num_end += (*(num_end + 1) == 's') ? 2 : 1;
+ break;
+ case 'm':
+ multiplier = 1000;
+ /* Skip another letter in the 'ms' case. */
+ num_end += (*(num_end + 1) == 's') ? 2 : 1;
+ break;
+ case 's':
+ multiplier = 1000000;
+ num_end++;
+ break;
+ case '\0':
+ break;
+ default:
+ DBG("utils_parse_time_suffix: invalid suffix.");
+ ret = -1;
+ goto end;
+ }
+
+ /* Check for garbage after the valid input. */
+ if (num_end != str_end) {
+ DBG("utils_parse_time_suffix: Garbage after time string.");
+ ret = -1;
+ goto end;
+ }
+
+ *time_us = base_time * multiplier;
+
+ /* Check for overflow */
+ if ((*time_us / multiplier) != base_time) {
+ DBG("utils_parse_time_suffix: oops, overflow detected.");
+ ret = -1;
+ goto end;
+ }
+
+ ret = 0;
+end:
+ return ret;
+}
+
/*
* fls: returns the position of the most significant bit.
* Returns 0 if no bit is set, else returns the position of the most
return home_dir;
}
-/*
- * Obtain the value of LTTNG_KMOD_PROBES environment variable, if exists.
- * Otherwise returns NULL.
- */
-LTTNG_HIDDEN
-char *utils_get_kmod_probes_list(void)
-{
- return lttng_secure_getenv(DEFAULT_LTTNG_KMOD_PROBES);
-}
-
-/*
- * Obtain the value of LTTNG_EXTRA_KMOD_PROBES environment variable, if
- * exists. Otherwise returns NULL.
- */
-LTTNG_HIDDEN
-char *utils_get_extra_kmod_probes_list(void)
-{
- return lttng_secure_getenv(DEFAULT_LTTNG_EXTRA_KMOD_PROBES);
-}
-
/*
* With the given format, fill dst with the time of len maximum siz.
*
int utils_truncate_stream_file(int fd, off_t length)
{
int ret;
+ off_t lseek_ret;
ret = ftruncate(fd, length);
if (ret < 0) {
PERROR("ftruncate");
goto end;
}
- ret = lseek(fd, length, SEEK_SET);
- if (ret < 0) {
+ lseek_ret = lseek(fd, length, SEEK_SET);
+ if (lseek_ret < 0) {
PERROR("lseek");
+ ret = -1;
goto end;
}
end:
}
LTTNG_HIDDEN
-int utils_show_man_page(int section, const char *page_name)
+int utils_show_help(int section, const char *page_name,
+ const char *help_msg)
{
char section_string[8];
const char *man_bin_path = get_man_bin_path();
- int ret;
+ int ret = 0;
+
+ if (help_msg) {
+ printf("%s", help_msg);
+ goto end;
+ }
/* Section integer -> section string */
ret = sprintf(section_string, "%d", section);
*/
ret = execlp(man_bin_path, "man", "-M", MANPATH,
section_string, page_name, NULL);
+
+end:
return ret;
}