Sat Aug 6 00:40:06 2011

Asterisk developer's documentation


term.c File Reference

Terminal Routines. More...

#include "asterisk.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <signal.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "asterisk/term.h"
#include "asterisk/options.h"
#include "asterisk/lock.h"
#include "asterisk/utils.h"

Go to the source code of this file.

Functions

int ast_term_init (void)
static short convshort (char *s)
char * term_color (char *outbuf, const char *inbuf, int fgcolor, int bgcolor, int maxout)
char * term_color_code (char *outbuf, int fgcolor, int bgcolor, int maxout)
char * term_end (void)
void term_filter_escapes (char *line)
char * term_prep (void)
char * term_prompt (char *outbuf, const char *inbuf, int maxout)
char * term_quit (void)
char * term_strip (char *outbuf, char *inbuf, int maxout)

Variables

static char enddata [80] = ""
static char prepdata [80] = ""
static char quitdata [80] = ""
static const char * termpath []
static int vt100compat


Detailed Description

Terminal Routines.

Author:
Mark Spencer <markster@digium.com>

Definition in file term.c.


Function Documentation

int ast_term_init ( void   ) 

Provided by term.c

Definition at line 75 of file term.c.

References ast_opt_console, ast_opt_no_color, ATTR_BRIGHT, ATTR_RESET, COLOR_BLACK, COLOR_BROWN, COLOR_WHITE, convshort(), and ESC.

Referenced by main().

00076 {
00077    char *term = getenv("TERM");
00078    char termfile[256] = "";
00079    char buffer[512] = "";
00080    int termfd = -1, parseokay = 0, i;
00081 
00082    if (ast_opt_no_color) {
00083       return 0;
00084    }
00085 
00086    if (!ast_opt_console) {
00087       /* If any remote console is not compatible, we'll strip the color codes at that point */
00088       vt100compat = 1;
00089       goto end;
00090    }
00091 
00092    if (!term) {
00093       return 0;
00094    }
00095 
00096    for (i = 0;; i++) {
00097       if (termpath[i] == NULL) {
00098          break;
00099       }
00100       snprintf(termfile, sizeof(termfile), "%s/%c/%s", termpath[i], *term, term);
00101       termfd = open(termfile, O_RDONLY);
00102       if (termfd > -1) {
00103          break;
00104       }
00105    }
00106    if (termfd > -1) {
00107       int actsize = read(termfd, buffer, sizeof(buffer) - 1);
00108       short sz_names = convshort(buffer + 2);
00109       short sz_bools = convshort(buffer + 4);
00110       short n_nums   = convshort(buffer + 6);
00111 
00112       /* if ((sz_names + sz_bools) & 1)
00113          sz_bools++; */
00114 
00115       if (sz_names + sz_bools + n_nums < actsize) {
00116          /* Offset 13 is defined in /usr/include/term.h, though we do not
00117           * include it here, as it conflicts with include/asterisk/term.h */
00118          short max_colors = convshort(buffer + 12 + sz_names + sz_bools + 13 * 2);
00119          if (max_colors > 0) {
00120             vt100compat = 1;
00121          }
00122          parseokay = 1;
00123       }
00124       close(termfd);
00125    }
00126 
00127    if (!parseokay) {
00128       /* These comparisons should not be substrings nor case-insensitive, as
00129        * terminal types are very particular about how they treat suffixes and
00130        * capitalization.  For example, terminal type 'linux-m' does NOT
00131        * support color, while 'linux' does.  Not even all vt100* terminals
00132        * support color, either (e.g. 'vt100+fnkeys'). */
00133       if (!strcmp(term, "linux")) {
00134          vt100compat = 1;
00135       } else if (!strcmp(term, "xterm")) {
00136          vt100compat = 1;
00137       } else if (!strcmp(term, "xterm-color")) {
00138          vt100compat = 1;
00139       } else if (!strncmp(term, "Eterm", 5)) {
00140          /* Both entries which start with Eterm support color */
00141          vt100compat = 1;
00142       } else if (!strcmp(term, "vt100")) {
00143          vt100compat = 1;
00144       } else if (!strncmp(term, "crt", 3)) {
00145          /* Both crt terminals support color */
00146          vt100compat = 1;
00147       }
00148    }
00149 
00150 end:
00151    if (vt100compat) {
00152       /* Make commands show up in nice colors */
00153       snprintf(prepdata, sizeof(prepdata), "%c[%d;%d;%dm", ESC, ATTR_BRIGHT, COLOR_BROWN, COLOR_BLACK + 10);
00154       snprintf(enddata, sizeof(enddata), "%c[%d;%d;%dm", ESC, ATTR_RESET, COLOR_WHITE, COLOR_BLACK + 10);
00155       snprintf(quitdata, sizeof(quitdata), "%c[0m", ESC);
00156    }
00157    return 0;
00158 }

static short convshort ( char *  s  )  [static]

Definition at line 60 of file term.c.

Referenced by ast_term_init().

00061 {
00062    register int a,b;
00063 
00064    a = (int) s[0] & 0377;
00065    b = (int) s[1] & 0377;
00066 
00067    if (a == 0377 && b == 0377)
00068       return -1;
00069    if (a == 0376 && b == 0377)
00070       return -2;
00071 
00072    return a + b * 256;
00073 }

char* term_color ( char *  outbuf,
const char *  inbuf,
int  fgcolor,
int  bgcolor,
int  maxout 
)

Definition at line 160 of file term.c.

References ast_copy_string(), ATTR_BRIGHT, COLOR_BLACK, COLOR_WHITE, and ESC.

Referenced by __ast_register_translator(), ast_frame_dump(), ast_log(), ast_register_application(), ast_unregister_translator(), fix_header(), handle_dahdi_show_cadences(), handle_show_application(), handle_show_application_deprecated(), handle_show_function(), handle_show_function_deprecated(), load_resource(), main(), pbx_extension_helper(), realtime_exec(), and show_config_description().

00161 {
00162    int attr=0;
00163    char tmp[40];
00164    if (!vt100compat) {
00165       ast_copy_string(outbuf, inbuf, maxout);
00166       return outbuf;
00167    }
00168    if (!fgcolor && !bgcolor) {
00169       ast_copy_string(outbuf, inbuf, maxout);
00170       return outbuf;
00171    }
00172    if ((fgcolor & 128) && (bgcolor & 128)) {
00173       /* Can't both be highlighted */
00174       ast_copy_string(outbuf, inbuf, maxout);
00175       return outbuf;
00176    }
00177    if (!bgcolor)
00178       bgcolor = COLOR_BLACK;
00179 
00180    if (bgcolor) {
00181       bgcolor &= ~128;
00182       bgcolor += 10;
00183    }
00184    if (fgcolor & 128) {
00185       attr = ATTR_BRIGHT;
00186       fgcolor &= ~128;
00187    }
00188    if (fgcolor && bgcolor) {
00189       snprintf(tmp, sizeof(tmp), "%d;%d", fgcolor, bgcolor);
00190    } else if (bgcolor) {
00191       snprintf(tmp, sizeof(tmp), "%d", bgcolor);
00192    } else if (fgcolor) {
00193       snprintf(tmp, sizeof(tmp), "%d", fgcolor);
00194    }
00195    if (attr) {
00196       snprintf(outbuf, maxout, "%c[%d;%sm%s%c[0;%d;%dm", ESC, attr, tmp, inbuf, ESC, COLOR_WHITE, COLOR_BLACK + 10);
00197    } else {
00198       snprintf(outbuf, maxout, "%c[%sm%s%c[0;%d;%dm", ESC, tmp, inbuf, ESC, COLOR_WHITE, COLOR_BLACK + 10);
00199    }
00200    return outbuf;
00201 }

char* term_color_code ( char *  outbuf,
int  fgcolor,
int  bgcolor,
int  maxout 
)

Definition at line 203 of file term.c.

References ATTR_BRIGHT, COLOR_BLACK, and ESC.

Referenced by cli_prompt().

00204 {
00205    int attr=0;
00206    char tmp[40];
00207    if ((!vt100compat) || (!fgcolor && !bgcolor)) {
00208       *outbuf = '\0';
00209       return outbuf;
00210    }
00211    if ((fgcolor & 128) && (bgcolor & 128)) {
00212       /* Can't both be highlighted */
00213       *outbuf = '\0';
00214       return outbuf;
00215    }
00216    if (!bgcolor)
00217       bgcolor = COLOR_BLACK;
00218 
00219    if (bgcolor) {
00220       bgcolor &= ~128;
00221       bgcolor += 10;
00222    }
00223    if (fgcolor & 128) {
00224       attr = ATTR_BRIGHT;
00225       fgcolor &= ~128;
00226    }
00227    if (fgcolor && bgcolor) {
00228       snprintf(tmp, sizeof(tmp), "%d;%d", fgcolor, bgcolor);
00229    } else if (bgcolor) {
00230       snprintf(tmp, sizeof(tmp), "%d", bgcolor);
00231    } else if (fgcolor) {
00232       snprintf(tmp, sizeof(tmp), "%d", fgcolor);
00233    }
00234    if (attr) {
00235       snprintf(outbuf, maxout, "%c[%d;%sm", ESC, attr, tmp);
00236    } else {
00237       snprintf(outbuf, maxout, "%c[%sm", ESC, tmp);
00238    }
00239    return outbuf;
00240 }

char* term_end ( void   ) 

Definition at line 305 of file term.c.

Referenced by consolehandler(), and main().

00306 {
00307    return enddata;
00308 }

void term_filter_escapes ( char *  line  ) 

Definition at line 278 of file term.c.

References ESC, and len().

Referenced by ast_log(), and ast_verbose().

00279 {
00280    int i;
00281    int len = strlen(line);
00282 
00283    for (i = 0; i < len; i++) {
00284       if (line[i] != ESC)
00285          continue;
00286       if ((i < (len - 2)) &&
00287           (line[i + 1] == 0x5B)) {
00288          switch (line[i + 2]) {
00289          case 0x30:
00290          case 0x31:
00291          case 0x33:
00292             continue;
00293          }
00294       }
00295       /* replace ESC with a space */
00296       line[i] = ' ';
00297    }
00298 }

char* term_prep ( void   ) 

Definition at line 300 of file term.c.

00301 {
00302    return prepdata;
00303 }

char* term_prompt ( char *  outbuf,
const char *  inbuf,
int  maxout 
)

Definition at line 263 of file term.c.

References ast_copy_string(), ATTR_BRIGHT, COLOR_BLACK, COLOR_BLUE, COLOR_WHITE, and ESC.

00264 {
00265    if (!vt100compat) {
00266       ast_copy_string(outbuf, inbuf, maxout);
00267       return outbuf;
00268    }
00269    snprintf(outbuf, maxout, "%c[%d;%d;%dm%c%c[%d;%d;%dm%s",
00270       ESC, ATTR_BRIGHT, COLOR_BLUE, COLOR_BLACK + 10,
00271       inbuf[0],
00272       ESC, 0, COLOR_WHITE, COLOR_BLACK + 10,
00273       inbuf + 1);
00274    return outbuf;
00275 }

char* term_quit ( void   ) 

Definition at line 310 of file term.c.

Referenced by ast_el_read_char(), main(), and quit_handler().

00311 {
00312    return quitdata;
00313 }

char* term_strip ( char *  outbuf,
char *  inbuf,
int  maxout 
)

Definition at line 242 of file term.c.

References ESC.

Referenced by __verboser(), action_command(), ast_log(), and ast_log_vsyslog().

00243 {
00244    char *outbuf_ptr = outbuf, *inbuf_ptr = inbuf;
00245 
00246    while (outbuf_ptr < outbuf + maxout) {
00247       switch (*inbuf_ptr) {
00248          case ESC:
00249             while (*inbuf_ptr && (*inbuf_ptr != 'm'))
00250                inbuf_ptr++;
00251             break;
00252          default:
00253             *outbuf_ptr = *inbuf_ptr;
00254             outbuf_ptr++;
00255       }
00256       if (! *inbuf_ptr)
00257          break;
00258       inbuf_ptr++;
00259    }
00260    return outbuf;
00261 }


Variable Documentation

char enddata[80] = "" [static]

Definition at line 49 of file term.c.

char prepdata[80] = "" [static]

Definition at line 48 of file term.c.

char quitdata[80] = "" [static]

Definition at line 50 of file term.c.

const char* termpath[] [static]

Definition at line 52 of file term.c.

int vt100compat [static]

Definition at line 46 of file term.c.


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