#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <termios.h>
#include <string.h>
#include <sys/ioctl.h>
#include "asterisk.h"
#include "asterisk/io.h"
#include "asterisk/logger.h"
Go to the source code of this file.
Data Structures | |
struct | io_context |
struct | io_rec |
Defines | |
#define | DEBUG(a) |
#define | GROW_SHRINK_SIZE 512 |
Functions | |
int | ast_get_termcols (int fd) |
int | ast_hide_password (int fd) |
int * | ast_io_add (struct io_context *ioc, int fd, ast_io_cb callback, short events, void *data) |
int * | ast_io_change (struct io_context *ioc, int *id, int fd, ast_io_cb callback, short events, void *data) |
void | ast_io_dump (struct io_context *ioc) |
int | ast_io_remove (struct io_context *ioc, int *_id) |
int | ast_io_wait (struct io_context *ioc, int howlong) |
int | ast_restore_tty (int fd, int oldstate) |
io_context * | io_context_create (void) |
void | io_context_destroy (struct io_context *ioc) |
static int | io_grow (struct io_context *ioc) |
static int | io_shrink (struct io_context *ioc) |
Definition in file io.c.
|
Definition at line 42 of file io.c. Referenced by ast_io_add(), ast_io_wait(), ast_sched_add_variable(), ast_sched_del(), ast_sched_runq(), ast_sched_wait(), ast_sched_when(), and io_grow(). |
|
Definition at line 61 of file io.c. Referenced by io_context_create(), and io_grow(). |
|
Definition at line 358 of file io.c. Referenced by ast_cli_display_match_list(). 00359 { 00360 struct winsize win; 00361 int cols = 0; 00362 00363 if (!isatty(fd)) 00364 return -1; 00365 00366 if ( ioctl(fd, TIOCGWINSZ, &win) != -1 ) { 00367 if ( !cols && win.ws_col > 0 ) 00368 cols = (int) win.ws_col; 00369 } else { 00370 /* assume 80 characters if the ioctl fails for some reason */ 00371 cols = 80; 00372 } 00373 00374 return cols; 00375 }
|
|
Set fd into non-echoing mode (if fd is a tty) Definition at line 322 of file io.c. References ECHO. Referenced by pw_cb(). 00323 { 00324 struct termios tios; 00325 int res; 00326 int old; 00327 if (!isatty(fd)) 00328 return -1; 00329 res = tcgetattr(fd, &tios); 00330 if (res < 0) 00331 return -1; 00332 old = tios.c_lflag & (ECHO | ECHONL); 00333 tios.c_lflag &= ~ECHO; 00334 tios.c_lflag |= ECHONL; 00335 res = tcsetattr(fd, TCSAFLUSH, &tios); 00336 if (res < 0) 00337 return -1; 00338 return old; 00339 }
|
|
Definition at line 154 of file io.c. References ast_log(), io_rec::callback, io_rec::data, DEBUG, pollfd::events, pollfd::fd, io_context::fdcnt, io_context::fds, io_rec::id, io_grow(), io_context::ior, LOG_DEBUG, malloc, io_context::maxfdcnt, and pollfd::revents. Referenced by ast_netsock_bindaddr(), do_monitor(), and network_thread(). 00155 { 00156 /* 00157 * Add a new I/O entry for this file descriptor 00158 * with the given event mask, to call callback with 00159 * data as an argument. Returns NULL on failure. 00160 */ 00161 int *ret; 00162 DEBUG(ast_log(LOG_DEBUG, "ast_io_add()\n")); 00163 if (ioc->fdcnt >= ioc->maxfdcnt) { 00164 /* 00165 * We don't have enough space for this entry. We need to 00166 * reallocate maxfdcnt poll fd's and io_rec's, or back out now. 00167 */ 00168 if (io_grow(ioc)) 00169 return NULL; 00170 } 00171 00172 /* 00173 * At this point, we've got sufficiently large arrays going 00174 * and we can make an entry for it in the pollfd and io_r 00175 * structures. 00176 */ 00177 ioc->fds[ioc->fdcnt].fd = fd; 00178 ioc->fds[ioc->fdcnt].events = events; 00179 ioc->fds[ioc->fdcnt].revents = 0; 00180 ioc->ior[ioc->fdcnt].callback = callback; 00181 ioc->ior[ioc->fdcnt].data = data; 00182 ioc->ior[ioc->fdcnt].id = (int *)malloc(sizeof(int)); 00183 /* Bonk if we couldn't allocate an int */ 00184 if (!ioc->ior[ioc->fdcnt].id) 00185 return NULL; 00186 *(ioc->ior[ioc->fdcnt].id) = ioc->fdcnt; 00187 ret = ioc->ior[ioc->fdcnt].id; 00188 ioc->fdcnt++; 00189 return ret; 00190 }
|
|
Definition at line 192 of file io.c. References io_rec::callback, io_rec::data, pollfd::events, pollfd::fd, io_context::fds, and io_context::ior. Referenced by do_monitor(). 00193 { 00194 if (*id < ioc->fdcnt) { 00195 if (fd > -1) 00196 ioc->fds[*id].fd = fd; 00197 if (callback) 00198 ioc->ior[*id].callback = callback; 00199 if (events) 00200 ioc->fds[*id].events = events; 00201 if (data) 00202 ioc->ior[*id].data = data; 00203 return id; 00204 } 00205 return NULL; 00206 }
|
|
Dumps the IO array Definition at line 298 of file io.c. References ast_log(), io_rec::callback, io_rec::data, pollfd::events, pollfd::fd, io_context::fdcnt, io_context::fds, io_rec::id, io_context::ior, LOG_DEBUG, and io_context::maxfdcnt. 00299 { 00300 /* 00301 * Print some debugging information via 00302 * the logger interface 00303 */ 00304 int x; 00305 ast_log(LOG_DEBUG, "Asterisk IO Dump: %d entries, %d max entries\n", ioc->fdcnt, ioc->maxfdcnt); 00306 ast_log(LOG_DEBUG, "================================================\n"); 00307 ast_log(LOG_DEBUG, "| ID FD Callback Data Events |\n"); 00308 ast_log(LOG_DEBUG, "+------+------+-----------+-----------+--------+\n"); 00309 for (x = 0; x < ioc->fdcnt; x++) { 00310 ast_log(LOG_DEBUG, "| %.4d | %.4d | %p | %p | %.6x |\n", 00311 *ioc->ior[x].id, 00312 ioc->fds[x].fd, 00313 ioc->ior[x].callback, 00314 ioc->ior[x].data, 00315 ioc->fds[x].events); 00316 } 00317 ast_log(LOG_DEBUG, "================================================\n"); 00318 }
|
|
Definition at line 235 of file io.c. References ast_log(), io_context::current_ioc, pollfd::events, io_context::fdcnt, io_context::fds, free, io_rec::id, io_shrink(), io_context::ior, LOG_WARNING, io_context::needshrink, and pollfd::revents. Referenced by ast_io_wait(), ast_netsock_destroy(), ast_rtp_destroy(), and reload_config(). 00236 { 00237 int x; 00238 if (!_id) { 00239 ast_log(LOG_WARNING, "Asked to remove NULL?\n"); 00240 return -1; 00241 } 00242 for (x = 0; x < ioc->fdcnt; x++) { 00243 if (ioc->ior[x].id == _id) { 00244 /* Free the int immediately and set to NULL so we know it's unused now */ 00245 free(ioc->ior[x].id); 00246 ioc->ior[x].id = NULL; 00247 ioc->fds[x].events = 0; 00248 ioc->fds[x].revents = 0; 00249 ioc->needshrink = 1; 00250 if (ioc->current_ioc == -1) 00251 io_shrink(ioc); 00252 return 0; 00253 } 00254 } 00255 00256 ast_log(LOG_NOTICE, "Unable to remove unknown id %p\n", _id); 00257 return -1; 00258 }
|
|
Definition at line 260 of file io.c. References ast_io_remove(), ast_log(), io_rec::callback, io_context::current_ioc, io_rec::data, DEBUG, pollfd::fd, io_context::fdcnt, io_context::fds, io_rec::id, io_context::ior, LOG_DEBUG, poll(), and pollfd::revents. Referenced by do_monitor(), network_thread(), and reload_config(). 00261 { 00262 /* 00263 * Make the poll call, and call 00264 * the callbacks for anything that needs 00265 * to be handled 00266 */ 00267 int res; 00268 int x; 00269 int origcnt; 00270 DEBUG(ast_log(LOG_DEBUG, "ast_io_wait()\n")); 00271 res = poll(ioc->fds, ioc->fdcnt, howlong); 00272 if (res > 0) { 00273 /* 00274 * At least one event 00275 */ 00276 origcnt = ioc->fdcnt; 00277 for(x = 0; x < origcnt; x++) { 00278 /* Yes, it is possible for an entry to be deleted and still have an 00279 event waiting if it occurs after the original calling id */ 00280 if (ioc->fds[x].revents && ioc->ior[x].id) { 00281 /* There's an event waiting */ 00282 ioc->current_ioc = *ioc->ior[x].id; 00283 if (ioc->ior[x].callback) { 00284 if (!ioc->ior[x].callback(ioc->ior[x].id, ioc->fds[x].fd, ioc->fds[x].revents, ioc->ior[x].data)) { 00285 /* Time to delete them since they returned a 0 */ 00286 ast_io_remove(ioc, ioc->ior[x].id); 00287 } 00288 } 00289 ioc->current_ioc = -1; 00290 } 00291 } 00292 if (ioc->needshrink) 00293 io_shrink(ioc); 00294 } 00295 return res; 00296 }
|
|
Restores TTY mode Definition at line 341 of file io.c. References ECHO. Referenced by pw_cb(). 00342 { 00343 int res; 00344 struct termios tios; 00345 if (oldstate < 0) 00346 return 0; 00347 res = tcgetattr(fd, &tios); 00348 if (res < 0) 00349 return -1; 00350 tios.c_lflag &= ~(ECHO | ECHONL); 00351 tios.c_lflag |= oldstate; 00352 res = tcsetattr(fd, TCSAFLUSH, &tios); 00353 if (res < 0) 00354 return -1; 00355 return 0; 00356 }
|
|
Create a context for I/O operations Basically mallocs an IO structure and sets up some default values. Returns an allocated io_context structure Definition at line 80 of file io.c. References io_context::current_ioc, io_context::fdcnt, io_context::fds, free, GROW_SHRINK_SIZE, io_context::ior, malloc, io_context::maxfdcnt, and io_context::needshrink. Referenced by load_module(). 00081 { 00082 /* Create an I/O context */ 00083 struct io_context *tmp; 00084 tmp = malloc(sizeof(struct io_context)); 00085 if (tmp) { 00086 tmp->needshrink = 0; 00087 tmp->fdcnt = 0; 00088 tmp->maxfdcnt = GROW_SHRINK_SIZE/2; 00089 tmp->current_ioc = -1; 00090 tmp->fds = malloc((GROW_SHRINK_SIZE/2) * sizeof(struct pollfd)); 00091 if (!tmp->fds) { 00092 free(tmp); 00093 tmp = NULL; 00094 } else { 00095 memset(tmp->fds, 0, (GROW_SHRINK_SIZE / 2) * sizeof(struct pollfd)); 00096 tmp->ior = malloc((GROW_SHRINK_SIZE / 2) * sizeof(struct io_rec)); 00097 if (!tmp->ior) { 00098 free(tmp->fds); 00099 free(tmp); 00100 tmp = NULL; 00101 } else { 00102 memset(tmp->ior, 0, (GROW_SHRINK_SIZE / 2) * sizeof(struct io_rec)); 00103 } 00104 } 00105 } 00106 return tmp; 00107 }
|
|
Destroys a context Definition at line 109 of file io.c. References io_context::fds, free, and io_context::ior. Referenced by unload_module(). 00110 { 00111 /* Free associated memory with an I/O context */ 00112 if (ioc->fds) 00113 free(ioc->fds); 00114 if (ioc->ior) 00115 free(ioc->ior); 00116 free(ioc); 00117 }
|
|
Definition at line 119 of file io.c. References ast_log(), DEBUG, io_context::fds, GROW_SHRINK_SIZE, io_context::ior, LOG_DEBUG, io_context::maxfdcnt, and realloc. Referenced by ast_io_add(). 00120 { 00121 /* 00122 * Grow the size of our arrays. Return 0 on success or 00123 * -1 on failure 00124 */ 00125 void *tmp; 00126 DEBUG(ast_log(LOG_DEBUG, "io_grow()\n")); 00127 ioc->maxfdcnt += GROW_SHRINK_SIZE; 00128 tmp = realloc(ioc->ior, (ioc->maxfdcnt + 1) * sizeof(struct io_rec)); 00129 if (tmp) { 00130 ioc->ior = (struct io_rec *)tmp; 00131 tmp = realloc(ioc->fds, (ioc->maxfdcnt + 1) * sizeof(struct pollfd)); 00132 if (tmp) { 00133 ioc->fds = tmp; 00134 } else { 00135 /* 00136 * Not enough memory for the pollfd. Not really any need 00137 * to shrink back the iorec's as we'll probably want to 00138 * grow them again soon when more memory is available, and 00139 * then they'll already be the right size 00140 */ 00141 ioc->maxfdcnt -= GROW_SHRINK_SIZE; 00142 return -1; 00143 } 00144 } else { 00145 /* 00146 * Out of memory. We return to the old size, and return a failure 00147 */ 00148 ioc->maxfdcnt -= GROW_SHRINK_SIZE; 00149 return -1; 00150 } 00151 return 0; 00152 }
|
|
Definition at line 208 of file io.c. References io_context::fdcnt, io_context::fds, io_rec::id, and io_context::ior. Referenced by ast_io_remove(). 00209 { 00210 int getfrom; 00211 int putto = 0; 00212 /* 00213 * Bring the fields from the very last entry to cover over 00214 * the entry we are removing, then decrease the size of the 00215 * arrays by one. 00216 */ 00217 for (getfrom = 0; getfrom < ioc->fdcnt; getfrom++) { 00218 if (ioc->ior[getfrom].id) { 00219 /* In use, save it */ 00220 if (getfrom != putto) { 00221 ioc->fds[putto] = ioc->fds[getfrom]; 00222 ioc->ior[putto] = ioc->ior[getfrom]; 00223 *(ioc->ior[putto].id) = putto; 00224 } 00225 putto++; 00226 } 00227 } 00228 ioc->fdcnt = putto; 00229 ioc->needshrink = 0; 00230 /* FIXME: We should free some memory if we have lots of unused 00231 io structs */ 00232 return 0; 00233 }
|