*/
#define _GNU_SOURCE
+#define _LGPL_SOURCE
+#include <assert.h>
#include <stdlib.h>
#include <ctype.h>
#include <limits.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <signal.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
#include <common/error.h>
+#include <common/utils.h>
#include "conf.h"
#include "utils.h"
+#include "command.h"
-/*
- * Return the realpath(3) of the path even if the last directory token does not
- * exist. For example, with /tmp/test1/test2, if test2/ does not exist but the
- * /tmp/test1 does, the real path is returned. In normal time, realpath(3)
- * fails if the end point directory does not exist.
- */
-char *expand_full_path(const char *path)
-{
- const char *end_path = path;
- char *next, *cut_path, *expanded_path;
-
- /* Find last token delimited by '/' */
- while ((next = strpbrk(end_path + 1, "/"))) {
- end_path = next;
- }
+static const char *str_kernel = "Kernel";
+static const char *str_ust = "UST";
+static const char *str_jul = "JUL";
+static const char *str_log4j = "LOG4J";
+static const char *str_python = "Python";
- /* Cut last token from original path */
- cut_path = strndup(path, end_path - path);
+static
+char *_get_session_name(int quiet)
+{
+ char *path, *session_name = NULL;
- expanded_path = malloc(PATH_MAX);
- if (expanded_path == NULL) {
+ /* Get path to config file */
+ path = utils_get_home_dir();
+ if (path == NULL) {
goto error;
}
- expanded_path = realpath((char *)cut_path, expanded_path);
- if (expanded_path == NULL) {
- switch (errno) {
- case ENOENT:
- ERR("%s: No such file or directory", cut_path);
- break;
- default:
- perror("realpath");
- break;
- }
+ /* Get session name from config */
+ session_name = quiet ? config_read_session_name_quiet(path) :
+ config_read_session_name(path);
+ if (session_name == NULL) {
goto error;
}
- /* Add end part to expanded path */
- strcat(expanded_path, end_path);
-
- free(cut_path);
- return expanded_path;
+ DBG2("Config file path found: %s", path);
+ DBG("Session name found: %s", session_name);
+ return session_name;
error:
- free(cut_path);
return NULL;
}
*/
char *get_session_name(void)
{
- char *path, *session_name = NULL;
-
- /* Get path to config file */
- path = config_get_default_path();
- if (path == NULL) {
- goto error;
- }
+ return _get_session_name(0);
+}
- /* Get session name from config */
- session_name = config_read_session_name(path);
- if (session_name == NULL) {
- goto error;
- }
+/*
+ * get_session_name_quiet (no warnings/errors emitted)
+ *
+ * Return allocated string with the session name found in the config
+ * directory.
+ */
+char *get_session_name_quiet(void)
+{
+ return _get_session_name(1);
+}
- DBG2("Config file path found: %s", path);
- DBG("Session name found: %s", session_name);
- return session_name;
+/*
+ * list_commands
+ *
+ * List commands line by line. This is mostly for bash auto completion and to
+ * avoid difficult parsing.
+ */
+void list_commands(struct cmd_struct *commands, FILE *ofp)
+{
+ int i = 0;
+ struct cmd_struct *cmd = NULL;
-error:
- return NULL;
+ cmd = &commands[i];
+ while (cmd->name != NULL) {
+ fprintf(ofp, "%s\n", cmd->name);
+ i++;
+ cmd = &commands[i];
+ }
}
-
/*
* list_cmd_options
*
}
}
}
+
+/*
+ * fls: returns the position of the most significant bit.
+ * Returns 0 if no bit is set, else returns the position of the most
+ * significant bit (from 1 to 32 on 32-bit, from 1 to 64 on 64-bit).
+ */
+#if defined(__i386) || defined(__x86_64)
+static inline
+unsigned int fls_u32(uint32_t x)
+{
+ int r;
+
+ asm("bsrl %1,%0\n\t"
+ "jnz 1f\n\t"
+ "movl $-1,%0\n\t"
+ "1:\n\t"
+ : "=r" (r) : "rm" (x));
+ return r + 1;
+}
+#define HAS_FLS_U32
+#endif
+
+#if defined(__x86_64)
+static inline
+unsigned int fls_u64(uint64_t x)
+{
+ long r;
+
+ asm("bsrq %1,%0\n\t"
+ "jnz 1f\n\t"
+ "movq $-1,%0\n\t"
+ "1:\n\t"
+ : "=r" (r) : "rm" (x));
+ return r + 1;
+}
+#define HAS_FLS_U64
+#endif
+
+#ifndef HAS_FLS_U64
+static __attribute__((unused))
+unsigned int fls_u64(uint64_t x)
+{
+ unsigned int r = 64;
+
+ if (!x)
+ return 0;
+
+ if (!(x & 0xFFFFFFFF00000000ULL)) {
+ x <<= 32;
+ r -= 32;
+ }
+ if (!(x & 0xFFFF000000000000ULL)) {
+ x <<= 16;
+ r -= 16;
+ }
+ if (!(x & 0xFF00000000000000ULL)) {
+ x <<= 8;
+ r -= 8;
+ }
+ if (!(x & 0xF000000000000000ULL)) {
+ x <<= 4;
+ r -= 4;
+ }
+ if (!(x & 0xC000000000000000ULL)) {
+ x <<= 2;
+ r -= 2;
+ }
+ if (!(x & 0x8000000000000000ULL)) {
+ x <<= 1;
+ r -= 1;
+ }
+ return r;
+}
+#endif
+
+#ifndef HAS_FLS_U32
+static __attribute__((unused))
+unsigned int fls_u32(uint32_t x)
+{
+ unsigned int r = 32;
+
+ if (!x)
+ return 0;
+ if (!(x & 0xFFFF0000U)) {
+ x <<= 16;
+ r -= 16;
+ }
+ if (!(x & 0xFF000000U)) {
+ x <<= 8;
+ r -= 8;
+ }
+ if (!(x & 0xF0000000U)) {
+ x <<= 4;
+ r -= 4;
+ }
+ if (!(x & 0xC0000000U)) {
+ x <<= 2;
+ r -= 2;
+ }
+ if (!(x & 0x80000000U)) {
+ x <<= 1;
+ r -= 1;
+ }
+ return r;
+}
+#endif
+
+static
+unsigned int fls_ulong(unsigned long x)
+{
+#if (CAA_BITS_PER_LONG == 32)
+ return fls_u32(x);
+#else
+ return fls_u64(x);
+#endif
+}
+
+/*
+ * Return the minimum order for which x <= (1UL << order).
+ * Return -1 if x is 0.
+ */
+int get_count_order_u32(uint32_t x)
+{
+ if (!x)
+ return -1;
+
+ return fls_u32(x - 1);
+}
+
+/*
+ * Return the minimum order for which x <= (1UL << order).
+ * Return -1 if x is 0.
+ */
+int get_count_order_u64(uint64_t x)
+{
+ if (!x)
+ return -1;
+
+ return fls_u64(x - 1);
+}
+
+/*
+ * Return the minimum order for which x <= (1UL << order).
+ * Return -1 if x is 0.
+ */
+int get_count_order_ulong(unsigned long x)
+{
+ if (!x)
+ return -1;
+
+ return fls_ulong(x - 1);
+}
+
+const char *get_domain_str(enum lttng_domain_type domain)
+{
+ const char *str_dom;
+
+ switch (domain) {
+ case LTTNG_DOMAIN_KERNEL:
+ str_dom = str_kernel;
+ break;
+ case LTTNG_DOMAIN_UST:
+ str_dom = str_ust;
+ break;
+ case LTTNG_DOMAIN_JUL:
+ str_dom = str_jul;
+ break;
+ case LTTNG_DOMAIN_LOG4J:
+ str_dom = str_log4j;
+ break;
+ case LTTNG_DOMAIN_PYTHON:
+ str_dom = str_python;
+ break;
+ default:
+ /* Should not have an unknown domain or else define it. */
+ assert(0);
+ }
+
+ return str_dom;
+}
+
+/*
+ * Spawn a lttng relayd daemon by forking and execv.
+ */
+int spawn_relayd(const char *pathname, int port)
+{
+ int ret = 0;
+ pid_t pid;
+ char url[255];
+
+ if (!port) {
+ port = DEFAULT_NETWORK_VIEWER_PORT;
+ }
+
+ ret = snprintf(url, sizeof(url), "tcp://localhost:%d", port);
+ if (ret < 0) {
+ goto end;
+ }
+
+ MSG("Spawning a relayd daemon");
+ pid = fork();
+ if (pid == 0) {
+ /*
+ * Spawn session daemon and tell
+ * it to signal us when ready.
+ */
+ execlp(pathname, "lttng-relayd", "-L", url, NULL);
+ /* execlp only returns if error happened */
+ if (errno == ENOENT) {
+ ERR("No relayd found. Use --relayd-path.");
+ } else {
+ PERROR("execlp");
+ }
+ kill(getppid(), SIGTERM); /* wake parent */
+ exit(EXIT_FAILURE);
+ } else if (pid > 0) {
+ goto end;
+ } else {
+ PERROR("fork");
+ ret = -1;
+ goto end;
+ }
+
+end:
+ return ret;
+}
+
+/*
+ * Check if relayd is alive.
+ *
+ * Return 1 if found else 0 if NOT found. Negative value on error.
+ */
+int check_relayd(void)
+{
+ int ret, fd;
+ struct sockaddr_in sin;
+
+ fd = socket(AF_INET, SOCK_STREAM, 0);
+ if (fd < 0) {
+ PERROR("socket check relayd");
+ ret = -1;
+ goto error_socket;
+ }
+
+ sin.sin_family = AF_INET;
+ sin.sin_port = htons(DEFAULT_NETWORK_VIEWER_PORT);
+ ret = inet_pton(sin.sin_family, "127.0.0.1", &sin.sin_addr);
+ if (ret < 1) {
+ PERROR("inet_pton check relayd");
+ ret = -1;
+ goto error;
+ }
+
+ /*
+ * A successful connect means the relayd exists thus returning 0 else a
+ * negative value means it does NOT exists.
+ */
+ ret = connect(fd, &sin, sizeof(sin));
+ if (ret < 0) {
+ /* Not found. */
+ ret = 0;
+ } else {
+ /* Already spawned. */
+ ret = 1;
+ }
+
+error:
+ if (close(fd) < 0) {
+ PERROR("close relayd fd");
+ }
+error_socket:
+ return ret;
+}
+
+int print_missing_or_multiple_domains(unsigned int sum)
+{
+ int ret = 0;
+
+ if (sum == 0) {
+ ERR("Please specify a domain (-k/-u/-j).");
+ ret = -1;
+ } else if (sum > 1) {
+ ERR("Multiple domains specified.");
+ ret = -1;
+ }
+
+ return ret;
+}
projects / lttng-tools.git / blobdiff