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legacy/libisoburn/branches/ZeroSixTwo/xorriso/sfile.c

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/* xorriso - creates, loads, manipulates and burns ISO 9660 filesystem images.
Copyright 2007-2010 Thomas Schmitt, <scdbackup@gmx.net>
Provided under GPL version 2 or later.
This file contains the implementation of functions around files and strings.
*/
#ifdef HAVE_CONFIG_H
#include "../config.h"
#endif
#include <ctype.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <time.h>
#include <pwd.h>
#include <grp.h>
#include "sfile.h"
/* @param flag bit0= do not clip off carriage return at line end
*/
char *Sfile_fgets_n(char *line, int maxl, FILE *fp, int flag)
{
int l;
char *ret;
ret= fgets(line,maxl,fp);
if(ret==NULL)
return(NULL);
l= strlen(line);
if(l > 0 && !(flag & 1)) if(line[l-1] == '\r') line[--l]= 0;
if(l > 0) if(line[l-1] == '\n') line[--l]= 0;
if(l > 0 && !(flag & 1)) if(line[l-1] == '\r') line[--l]= 0;
return(ret);
}
int Sfile_count_components(char *path, int flag)
/*
bit0= do not ignore trailing slash
bit1= do not ignore empty components (other than the empty root name)
*/
{
int l,count= 0;
char *cpt;
l= strlen(path);
if(l==0)
return(0);
count= 1;
for(cpt= path+l-1;cpt>=path;cpt--) {
if(*cpt=='/') {
if(*(cpt+1)==0 && !(flag&1))
continue;
if(*(cpt+1)=='/' && !(flag&2))
continue;
count++;
}
}
return(count);
}
int Sfile_component_pointer(char *path, char **sourcept, int idx, int flag)
/*
bit0= do not ignore trailing slash
bit1= do not ignore empty components (other than the empty root name)
bit2= accept 0 as '/'
*/
{
int count= 0;
char *spt;
for(spt= path;*spt!=0 || (flag&4);spt++) {
if(count>=idx) {
*sourcept= spt;
return(1);
}
if(*spt=='/' || *spt==0) {
if(*(spt+1)=='/' && !(flag&2))
continue;
if(*(spt+1)==0 && !(flag&1))
continue;
count++;
}
}
if((flag&1) && count>=idx)
return(1);
return(0);
}
int Sfile_leafname(char *path, char leafname[SfileadrL], int flag)
{
int count, ret;
char *lpt;
leafname[0]= 0;
count= Sfile_count_components(path, 0);
if(count==0)
return(0);
ret= Sfile_component_pointer(path, &lpt, count-1, 0);
if(ret<=0)
return(ret);
if(Sfile_str(leafname, lpt, 0)<=0)
return(0);
lpt= strchr(leafname, '/');
if(lpt!=NULL)
*lpt= 0;
return(1);
}
int Sfile_add_to_path(char path[SfileadrL], char *addon, int flag)
{
int l;
l= strlen(path);
if(l+1>=SfileadrL)
return(0);
if(l==0) {
strcpy(path,"/");
l= 1;
} else if(path[l-1]!='/') {
path[l++]= '/';
path[l]= 0;
}
if(l+strlen(addon)>=SfileadrL)
return(0);
if(addon[0]=='/')
strcpy(path+l,addon+1);
else
strcpy(path+l,addon);
return(1);
}
int Sfile_prepend_path(char *prefix, char path[SfileadrL], int flag)
{
int l, i;
l= strlen(path)+strlen(prefix)+1;
if(l>=SfileadrL) {
#ifdef Not_yeT
/* >>> ??? how to transport messages to xorriso ? */
sprintf(xorriso->info_text,
"Combination of wd and relative address too long (%d > %d)",
l,SfileadrL-1);
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
#endif
return(-1);
}
l-= strlen(path);
for(i= strlen(path)+1; i>=0; i--)
path[i+l]= path[i];
strcpy(path,prefix);
path[l-1]= '/';
return(1);
}
int Sfile_being_group_member(struct stat *stbuf, int flag)
{
int i, suppl_groups;
gid_t *suppl_glist;
if (getegid()==stbuf->st_gid)
return(1);
suppl_groups= getgroups(0, NULL);
suppl_glist= (gid_t *) malloc((suppl_groups + 1) * sizeof(gid_t));
if (suppl_glist==NULL)
return(-1);
suppl_groups= getgroups(suppl_groups+1,suppl_glist);
for (i= 0; i<suppl_groups; i++) {
if (suppl_glist[i]==stbuf->st_gid) {
free((char *) suppl_glist);
return(1);
}
}
free((char *) suppl_glist);
return(0);
}
int Sfile_type(char *filename, int flag)
/*
bit0= return -1 if file is missing
bit1= return a hardlink with siblings as type 5
bit2= evaluate eventual link target rather than the link object itself
bit3= return a socket or a char device as types 7 or 8 rather than 0
*/
/*
return:
0=unknown
1=regular
2=directory
3=symbolic link
4=named pipe
5=multiple hardlink (with bit1)
6=block device
7=socket (with bit3)
8=character device (with bit3)
*/
{
struct stat stbuf;
if(flag&4) {
if(stat(filename,&stbuf)==-1) {
if(flag&1) return(-1);
else return(0);
}
} else {
if(lstat(filename,&stbuf)==-1) {
if(flag&1) return(-1);
else return(0);
}
}
if(S_ISREG(stbuf.st_mode)) {
if(flag&2)
if(stbuf.st_nlink>1)
return(5);
return(1);
}
if(S_ISDIR(stbuf.st_mode))
return(2);
if((stbuf.st_mode&S_IFMT)==S_IFLNK)
return(3);
if(S_ISFIFO(stbuf.st_mode))
return(4);
if(S_ISBLK(stbuf.st_mode))
return(6);
if(flag&8)
if((stbuf.st_mode&S_IFMT)==S_IFSOCK)
return(7);
if(flag&8)
if(S_ISCHR(stbuf.st_mode))
return(8);
return(0);
}
char *Sfile_datestr(time_t tim, short int flag)
/*
bit0=with hours+minutes
bit1=with seconds
bit8= local time rather than UTC
*/
{
static char zeitcode[80]={"000000"};
char puff[80];
struct tm *azt;
if(flag&256)
azt = localtime(&tim);
else
azt = gmtime(&tim);
if(azt->tm_year>99)
sprintf(zeitcode,"%c%1.1d%2.2d%2.2d",
'A'+(azt->tm_year-100)/10,azt->tm_year%10,
azt->tm_mon+1,azt->tm_mday);
else
sprintf(zeitcode,"%2.2d%2.2d%2.2d",
azt->tm_year,azt->tm_mon+1,azt->tm_mday);
if(flag&1){
sprintf(puff,".%2.2d%2.2d",azt->tm_hour,azt->tm_min);
strcat(zeitcode,puff);
}
if(flag&2){
sprintf(puff,"%2.2d",azt->tm_sec);
strcat(zeitcode,puff);
}
return(zeitcode);
}
int Sfile_scale(double value, char *result, int siz, double thresh, int flag)
/*
bit0= eventually ommit 'b'
bit1= make text as short as possible
bit2= no fraction (if it would fit at all)
*/
{
char scale_c,scales[7],form[80], *negpt= NULL, *cpt;
int i,dec_siz= 0,avail_siz= 1;
if(value<0) {
value= -value;
siz--;
result[0]= '-';
negpt= result;
result++;
}
strcpy(scales,"bkmgtp");
scale_c= scales[0];
for(i=1;scales[i]!=0;i++) {
if(value<thresh-0.5)
break;
value/= 1024.0;
scale_c= scales[i];
}
if(scale_c!='b' && !(flag&4)) { /* is there room for fractional part ? */
avail_siz= siz-1;
sprintf(form,"%%.f");
sprintf(result,"%.f",value);
if(strlen(result)<=avail_siz-2)
dec_siz= 1; /* we are very modest */
}
if(scale_c=='b' && (flag&1)) {
if(flag&2)
sprintf(form,"%%.f");
else
sprintf(form,"%%%d.f",siz);
sprintf(result,form,value);
} else {
if(flag&2)
sprintf(form,"%%.f%%c");
else if(dec_siz>0)
sprintf(form,"%%%d.%df%%c",avail_siz,dec_siz);
else
sprintf(form,"%%%d.f%%c",siz-1);
sprintf(result,form,value,scale_c);
}
if(negpt != NULL) {
for(cpt= result; *cpt==' '; cpt++);
if(cpt > result) {
*negpt= ' ';
*(cpt - 1)= '-';
}
}
return(1);
}
int Sfile_off_t_text(char text[80], off_t num, int flag)
{
char *tpt;
off_t hnum, scale= 1;
int digits= 0, d, i;
tpt= text;
hnum= num;
if(hnum<0) {
*(tpt++)= '-';
hnum= -num;
}
if(hnum<0) { /* it can stay nastily persistent */
strcpy(text, "_overflow_");
return(0);
}
for(i= 0; i<23; i++) { /* good for up to 70 bit = 10 exp 21.07... */
if(hnum==0)
break;
hnum/= 10;
if(hnum)
scale*= 10;
}
if(i==0) {
strcpy(text, "0");
return(1);
}
if(i==23) {
strcpy(text, "_overflow_");
return(0);
}
digits= i;
hnum= num;
for(; i>0; i--) {
d= hnum/scale;
tpt[digits-i]= '0'+d;
hnum= hnum%scale;
scale/= 10;
}
tpt[digits]= 0;
return(1);
}
/* Converts backslash codes into single characters:
\a BEL 7 , \b BS 8 , \e ESC 27 , \f FF 12 , \n LF 10 , \r CR 13 ,
\t HT 9 , \v VT 11 , \\ \ 92
\[0-9][0-9][0-9] octal code , \x[0-9a-f][0-9a-f] hex code ,
\cX control-x (ascii(X)-64)
@param upto maximum number of characters to examine for backslash.
The scope of a backslash (0 to 3 characters) is not affected.
@param eaten returns the difference in length between input and output
@param flag bit0= only determine *eaten, do not convert
bit1= allow to convert \000 to binary 0
*/
int Sfile_bsl_interpreter(char *text, int upto, int *eaten, int flag)
{
char *rpt, *wpt, num_text[8], wdummy[8];
unsigned int num= 0;
*eaten= 0;
wpt= text;
for(rpt= text; *rpt != 0 && rpt - text < upto; rpt++) {
if(flag & 1)
wpt= wdummy;
if(*rpt == '\\') {
rpt++;
(*eaten)++;
if(*rpt == 'a') {
*(wpt++)= 7;
} else if(*rpt == 'b') {
*(wpt++)= 8;
} else if(*rpt == 'e') {
*(wpt++)= 27;
} else if(*rpt == 'f') {
*(wpt++)= 12;
} else if(*rpt == 'n') {
*(wpt++)= 10;
} else if(*rpt == 'r') {
*(wpt++)= 13;
} else if(*rpt == 't') {
*(wpt++)= 9;
} else if(*rpt == 'v') {
*(wpt++)= 11;
} else if(*rpt == '\\') {
*(wpt++)= '\\';
} else if(rpt[0] >= '0' && rpt[0] <= '7' &&
rpt[1] >= '0' && rpt[1] <= '7' &&
rpt[2] >= '0' && rpt[2] <= '7') {
num_text[0]= '0';
num_text[1]= *(rpt + 0);
num_text[2]= *(rpt + 1);
num_text[3]= *(rpt + 2);
num_text[4]= 0;
sscanf(num_text, "%o", &num);
if((num > 0 || (flag & 2)) && num <= 255) {
rpt+= 2;
(*eaten)+= 2;
*(wpt++)= num;
} else
goto not_a_code;
} else if(rpt[0] == 'x' &&
((rpt[1] >= '0' && rpt[1] <= '9') ||
(rpt[1] >= 'A' && rpt[1] <= 'F') ||
(rpt[1] >= 'a' && rpt[1] <= 'f'))
&&
((rpt[2] >= '0' && rpt[2] <= '9') ||
(rpt[2] >= 'A' && rpt[2] <= 'F') ||
(rpt[2] >= 'a' && rpt[2] <= 'f'))
) {
num_text[0]= *(rpt + 1);
num_text[1]= *(rpt + 2);
num_text[2]= 0;
sscanf(num_text, "%x", &num);
if(num > 0 && num <= 255) {
rpt+= 2;
(*eaten)+= 2;
*(wpt++)= num;
} else
goto not_a_code;
} else if(*rpt == 'c') {
if(rpt[1] > 64 && rpt[1] < 96) {
*(wpt++)= rpt[1] - 64;
rpt++;
(*eaten)++;
} else
goto not_a_code;
} else {
not_a_code:;
*(wpt++)= '\\';
rpt--;
(*eaten)--;
}
} else
*(wpt++)= *rpt;
}
*wpt= *rpt;
return(1);
}
int Sfile_argv_bsl(int argc, char ***argv, int flag)
{
int i, ret, eaten;
char **new_argv= NULL;
if(argc <= 0)
return(0);
new_argv= (char **) Smem_malloC(argc * sizeof(char *));
if(new_argv == NULL)
return(-1);
for(i= 0; i < argc; i++) {
new_argv[i]= strdup((*argv)[i]);
if(new_argv[i] == NULL)
{ret= -1; goto ex;}
ret= Sfile_bsl_interpreter(new_argv[i], strlen(new_argv[i]), &eaten, 0);
if(ret <= 0)
goto ex;
}
ret= 1;
ex:;
if(ret <= 0) {
if(new_argv != NULL)
free((char *) new_argv);
} else
*argv= new_argv;
return(ret);
}
/* @param flag bit0= only encode inside quotes
bit1= encode < 32 outside quotes except 7, 8, 9, 10, 12, 13
bit2= encode in any case above 126
bit3= encode in any case shellsafe and name-value-safe:
<=42 , 59, 60, 61, 62, 63, 92, 94, 96, >=123
*/
int Sfile_bsl_encoder(char **result, char *text, size_t text_len, int flag)
{
char *rpt, *wpt;
int count, sq_open= 0, dq_open= 0;
count= 0;
for(rpt= text; rpt - text < text_len; rpt++) {
count++;
if(flag & 8) {
if(!(*rpt <= 42 || (*rpt >= 59 && *rpt <= 63) ||
*rpt == 92 || *rpt == 94 || *rpt == 96 || *rpt >= 123))
continue;
} else if(*rpt >= 32 && *rpt <= 126 && *rpt != '\\')
continue;
if(((*rpt >= 7 && *rpt <= 13) || *rpt == 27 || *rpt == '\\') && !(flag & 8))
count++;
else
count+= 3;
}
(*result)= wpt= calloc(count + 1, 1);
if(wpt == NULL)
return(-1);
for(rpt= text; rpt - text < text_len; rpt++) {
if(*rpt == '\'')
sq_open= !(sq_open || dq_open);
if(*rpt == '"')
dq_open= !(sq_open || dq_open);
if(flag & 8) {
if(!(*rpt <= 42 || (*rpt >= 59 && *rpt <= 63) ||
*rpt == 92 || *rpt == 94 || *rpt == 96 || *rpt >= 123)) {
*(wpt++)= *rpt;
continue;
}
} else if(*rpt >= 32 && *rpt <= 126 && *rpt != '\\') {
*(wpt++)= *rpt;
continue;
} else if( ((flag & 1) && !(sq_open || dq_open)) &&
!((flag & 2) && (*rpt >= 1 && * rpt <= 31 &&
!(*rpt == 7 || *rpt == 8 || *rpt == 9 || *rpt == 10 ||
*rpt == 12 || *rpt == 13))) &&
!((flag & 4) && (*rpt > 126 || *rpt < 0)) &&
!((flag & 6) && *rpt == '\\')) {
*(wpt++)= *rpt;
continue;
}
*(wpt++)= '\\';
if(((*rpt >= 7 && *rpt <= 13) || *rpt == 27 || *rpt == '\\') && !(flag&8)) {
if(*rpt == 7)
*(wpt++)= 'a';
else if(*rpt == 8)
*(wpt++)= 'b';
else if(*rpt == 9)
*(wpt++)= 't';
else if(*rpt == 10) {
*(wpt++)= 'n';
} else if(*rpt == 11)
*(wpt++)= 'v';
else if(*rpt == 12)
*(wpt++)= 'f';
else if(*rpt == 13)
*(wpt++)= 'c';
else if(*rpt == 27)
*(wpt++)= 'e';
else if(*rpt == '\\')
*(wpt++)= '\\';
} else {
sprintf(wpt, "%-3.3o", (unsigned int) *((unsigned char *) rpt));
wpt+= 3;
}
}
*wpt= 0;
return(1);
}
int Sfile_destroy_argv(int *argc, char ***argv, int flag)
{
int i;
if(*argc>0 && *argv!=NULL){
for(i=0;i<*argc;i++){
if((*argv)[i]!=NULL)
Smem_freE((*argv)[i]);
}
Smem_freE((char *) *argv);
}
*argc= 0;
*argv= NULL;
return(1);
}
int Sfile_make_argv(char *progname, char *line, int *argc, char ***argv,
int flag)
/*
bit0= read progname as first argument from line
bit1= just release argument list argv and return
bit2= abort with return(0) if incomplete quotes are found
bit3= eventually prepend missing '-' to first argument read from line
bit4= like bit2 but only check quote completeness, do not allocate memory
bit5+6= interpretation of backslashes:
0= no interpretation, leave unchanged
1= only inside double quotes
2= outside single quotes
3= everywhere
bit7= append a NULL element to argv
*/
{
int i,pass,maxl=0,l,argzaehl=0,bufl,line_start_argc, bsl_mode, ret= 0, eaten;
char *cpt,*start;
char *buf= NULL;
Sfile_destroy_argv(argc,argv,0);
if(flag&2)
{ret= 1; goto ex;}
if(flag & 16)
flag|= 4;
bsl_mode= (flag >> 5) & 3;
buf= calloc(strlen(line) + SfileadrL, 1);
if(buf == NULL)
{ret= -1; goto ex;}
for(pass=0;pass<2;pass++) {
cpt= line-1;
if(!(flag&1)){
argzaehl= line_start_argc= 1;
if(pass==0)
maxl= strlen(progname);
else
strcpy((*argv)[0],progname);
} else {
argzaehl= line_start_argc= 0;
if(pass==0) maxl= 0;
}
while(*(++cpt)!=0){
if(isspace(*cpt)) continue;
start= cpt;
buf[0]= 0;
cpt--;
while(*(++cpt)!=0) {
if(isspace(*cpt)) break;
if(*cpt=='"'){
l= cpt-start; bufl= strlen(buf);
if(l>0) {
strncpy(buf + bufl, start, l); buf[bufl + l]= 0;
if(bsl_mode >= 3) {
ret= Sfile_bsl_interpreter(buf, l, &eaten, 0);
if(ret <= 0)
goto ex;
}
}
l= strlen(buf);
start= cpt+1;
while(*(++cpt)!=0) if(*cpt=='"') break;
if((flag&4) && *cpt==0)
{ret= 0; goto ex;}
l= cpt-start; bufl= strlen(buf);
if(l>0) {
strncpy(buf + bufl, start, l);
buf[bufl + l]= 0;
if(bsl_mode >= 1) {
ret= Sfile_bsl_interpreter(buf + bufl, l, &eaten, 0);
if(ret <= 0)
goto ex;
}
}
start= cpt+1;
}else if(*cpt=='\''){
l= cpt-start; bufl= strlen(buf);
if(l>0) {
strncpy(buf + bufl, start, l); buf[bufl + l]= 0;
if(bsl_mode >= 3) {
ret= Sfile_bsl_interpreter(buf, l, &eaten, 0);
if(ret <= 0)
goto ex;
}
}
l= strlen(buf);
start= cpt+1;
while(*(++cpt)!=0) if(*cpt=='\'') break;
if((flag&4) && *cpt==0)
{ret= 0; goto ex;}
l= cpt-start; bufl= strlen(buf);
if(l>0) {
strncat(buf,start,l);buf[bufl+l]= 0;
if(bsl_mode >= 2) {
ret= Sfile_bsl_interpreter(buf + bufl, l, &eaten, 0);
if(ret <= 0)
goto ex;
}
}
start= cpt+1;
}
if(*cpt==0) break;
}
l= cpt-start;
bufl= strlen(buf);
if(l>0) {
strncpy(buf + bufl, start, l); buf[bufl + l]= 0;
if(bsl_mode >= 3) {
ret= Sfile_bsl_interpreter(buf, l, &eaten, 0);
if(ret <= 0)
goto ex;
}
}
l= strlen(buf);
if(pass==0){
if(argzaehl==line_start_argc && (flag&8))
if(buf[0]!='-' && buf[0]!=0 && buf[0]!='#')
l++;
if(l>maxl) maxl= l;
}else{
strcpy((*argv)[argzaehl],buf);
if(argzaehl==line_start_argc && (flag&8))
if(buf[0]!='-' && buf[0]!=0 && buf[0]!='#')
sprintf((*argv)[argzaehl],"-%s", buf);
}
argzaehl++;
if(*cpt==0) break;
}
if(pass==0){
if(flag & 16)
{ret= 1; goto ex;}
*argc= argzaehl;
if(argzaehl>0 || (flag & 128)) {
*argv= (char **) Smem_malloC((argzaehl + !!(flag & 128))
* sizeof(char *));
if(*argv==NULL)
{ret= -1; goto ex;}
}
for(i=0;i<*argc;i++) {
(*argv)[i]= (char *) Smem_malloC((maxl+1));
if((*argv)[i]==NULL)
{ret= -1; goto ex;}
}
if(flag & 128)
(*argv)[*argc]= NULL;
}
}
ret= 1;
ex:
if(buf != NULL)
free(buf);
return(ret);
}
/* @param flag bit0= append */
int Sfile_str(char target[SfileadrL], char *source, int flag)
{
int l;
l= strlen(source);
if(flag&1)
l+= strlen(target);
if(l>=SfileadrL) {
fprintf(stderr, "--- Path string overflow (%d > %d). Malicious input ?\n",
l,SfileadrL-1);
return(0);
}
if(flag&1)
strcat(target, source);
else
strcpy(target, source);
return(1);
}
/** Combine environment variable HOME with given filename
@param filename Address relative to $HOME
@param fileadr Resulting combined address
@param fa_size Size of array fileadr
@param flag Unused yet
@return 1=ok , 0=no HOME variable , -1=result address too long
*/
int Sfile_home_adr_s(char *filename, char *fileadr, int fa_size, int flag)
{
char *home;
strcpy(fileadr,filename);
home= getenv("HOME");
if(home==NULL)
return(0);
if(strlen(home)+strlen(filename)+1>=fa_size)
return(-1);
strcpy(fileadr,home);
if(filename[0]!=0){
strcat(fileadr,"/");
strcat(fileadr,filename);
}
return(1);
}
/** Return a double representing seconds and microseconds since 1 Jan 1970 */
double Sfile_microtime(int flag)
{
struct timeval tv;
struct timezone tz;
gettimeofday(&tv,&tz);
return((double) (tv.tv_sec+1.0e-6*tv.tv_usec));
}
int Sfile_decode_datestr(struct tm *reply, char *text, int flag)
/* YYMMDD[.hhmm[ss]] */
{
int i,l;
time_t current_time;
struct tm *now;
current_time= time(0);
now= localtime(&current_time);
for(i=0;i<sizeof(struct tm);i++)
((char *) reply)[i]= ((char *) now)[i];
if(text[0]<'0'|| (text[0]>'9' && text[0]<'A') || text[0]>'Z')
return(0);
l= strlen(text);
for(i=1;i<l;i++)
if(text[i]<'0'||text[i]>'9')
break;
if(i!=6)
return(0);
if(text[i]==0)
goto decode;
if(text[i]!='.' || (l!=11 && l!=13))
return(0);
for(i++;i<l;i++)
if(text[i]<'0'||text[i]>'9')
break;
if(i!=l)
return(0);
decode:;
reply->tm_hour= 0;
reply->tm_min= 0;
reply->tm_sec= 0;
i= 0;
if(text[0]>='A')
reply->tm_year= 100+(text[i]-'A')*10+text[1]-'0';
else
reply->tm_year= 10*(text[0]-'0')+text[1]-'0';
reply->tm_mon= 10*(text[2]-'0')+text[3]-'0'-1;
reply->tm_mday= 10*(text[4]-'0')+text[5]-'0';
if(l==6)
return(1);
reply->tm_hour= 10*(text[7]-'0')+text[8]-'0';
reply->tm_min= 10*(text[9]-'0')+text[10]-'0';
if(l==11)
return(1);
reply->tm_sec= 10*(text[11]-'0')+text[12]-'0';
return(1);
}
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