2 * Copyright (c) 2011 David Goulet <david.goulet@polymtl.ca>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2 only,
6 * as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #include <sys/types.h>
24 #include <sys/socket.h>
26 #include <netinet/in.h>
27 #include <arpa/inet.h>
29 #include <common/error.h>
30 #include <common/utils.h>
36 static const char *str_kernel
= "Kernel";
37 static const char *str_ust
= "UST";
38 static const char *str_jul
= "JUL";
41 char *_get_session_name(int quiet
)
43 char *path
, *session_name
= NULL
;
45 /* Get path to config file */
46 path
= utils_get_home_dir();
51 /* Get session name from config */
52 session_name
= quiet
? config_read_session_name_quiet(path
) :
53 config_read_session_name(path
);
54 if (session_name
== NULL
) {
58 DBG2("Config file path found: %s", path
);
59 DBG("Session name found: %s", session_name
);
69 * Return allocated string with the session name found in the config
72 char *get_session_name(void)
74 return _get_session_name(0);
78 * get_session_name_quiet (no warnings/errors emitted)
80 * Return allocated string with the session name found in the config
83 char *get_session_name_quiet(void)
85 return _get_session_name(1);
91 * List commands line by line. This is mostly for bash auto completion and to
92 * avoid difficult parsing.
94 void list_commands(struct cmd_struct
*commands
, FILE *ofp
)
97 struct cmd_struct
*cmd
= NULL
;
100 while (cmd
->name
!= NULL
) {
101 fprintf(ofp
, "%s\n", cmd
->name
);
110 * Prints a simple list of the options available to a command. This is intended
111 * to be easily parsed for bash completion.
113 void list_cmd_options(FILE *ofp
, struct poptOption
*options
)
116 struct poptOption
*option
= NULL
;
118 for (i
= 0; options
[i
].longName
!= NULL
; i
++) {
119 option
= &options
[i
];
121 fprintf(ofp
, "--%s\n", option
->longName
);
123 if (isprint(option
->shortName
)) {
124 fprintf(ofp
, "-%c\n", option
->shortName
);
130 * fls: returns the position of the most significant bit.
131 * Returns 0 if no bit is set, else returns the position of the most
132 * significant bit (from 1 to 32 on 32-bit, from 1 to 64 on 64-bit).
134 #if defined(__i386) || defined(__x86_64)
136 unsigned int fls_u32(uint32_t x
)
144 : "=r" (r
) : "rm" (x
));
150 #if defined(__x86_64)
152 unsigned int fls_u64(uint64_t x
)
160 : "=r" (r
) : "rm" (x
));
167 static __attribute__((unused
))
168 unsigned int fls_u64(uint64_t x
)
175 if (!(x
& 0xFFFFFFFF00000000ULL
)) {
179 if (!(x
& 0xFFFF000000000000ULL
)) {
183 if (!(x
& 0xFF00000000000000ULL
)) {
187 if (!(x
& 0xF000000000000000ULL
)) {
191 if (!(x
& 0xC000000000000000ULL
)) {
195 if (!(x
& 0x8000000000000000ULL
)) {
204 static __attribute__((unused
))
205 unsigned int fls_u32(uint32_t x
)
211 if (!(x
& 0xFFFF0000U
)) {
215 if (!(x
& 0xFF000000U
)) {
219 if (!(x
& 0xF0000000U
)) {
223 if (!(x
& 0xC0000000U
)) {
227 if (!(x
& 0x80000000U
)) {
236 unsigned int fls_ulong(unsigned long x
)
238 #if (CAA_BITS_PER_LONG == 32)
246 * Return the minimum order for which x <= (1UL << order).
247 * Return -1 if x is 0.
249 int get_count_order_u32(uint32_t x
)
254 return fls_u32(x
- 1);
258 * Return the minimum order for which x <= (1UL << order).
259 * Return -1 if x is 0.
261 int get_count_order_u64(uint64_t x
)
266 return fls_u64(x
- 1);
270 * Return the minimum order for which x <= (1UL << order).
271 * Return -1 if x is 0.
273 int get_count_order_ulong(unsigned long x
)
278 return fls_ulong(x
- 1);
281 const char *get_domain_str(enum lttng_domain_type domain
)
286 case LTTNG_DOMAIN_KERNEL
:
287 str_dom
= str_kernel
;
289 case LTTNG_DOMAIN_UST
:
292 case LTTNG_DOMAIN_JUL
:
296 /* Should not have an unknown domain or else define it. */
304 * Spawn a lttng relayd daemon by forking and execv.
306 int spawn_relayd(const char *pathname
, int port
)
313 port
= DEFAULT_NETWORK_VIEWER_PORT
;
316 ret
= snprintf(url
, sizeof(url
), "tcp://localhost:%d", port
);
321 MSG("Spawning a relayd daemon");
325 * Spawn session daemon and tell
326 * it to signal us when ready.
328 execlp(pathname
, "lttng-relayd", "-L", url
, NULL
);
329 /* execlp only returns if error happened */
330 if (errno
== ENOENT
) {
331 ERR("No relayd found. Use --relayd-path.");
335 kill(getppid(), SIGTERM
); /* wake parent */
337 } else if (pid
> 0) {
350 * Check if relayd is alive.
352 * Return 1 if found else 0 if NOT found. Negative value on error.
354 int check_relayd(void)
357 struct sockaddr_in sin
;
359 fd
= socket(AF_INET
, SOCK_STREAM
, 0);
361 perror("socket check relayd");
366 sin
.sin_family
= AF_INET
;
367 sin
.sin_port
= htons(DEFAULT_NETWORK_VIEWER_PORT
);
368 ret
= inet_pton(sin
.sin_family
, "127.0.0.1", &sin
.sin_addr
);
370 perror("inet_pton check relayd");
376 * A successful connect means the relayd exists thus returning 0 else a
377 * negative value means it does NOT exists.
379 ret
= connect(fd
, &sin
, sizeof(sin
));
384 /* Already spawned. */
390 perror("close relayd fd");