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Implemented a more reasonable solution for drive truncation with regular files

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This commit is contained in:
Thomas Schmitt
2008-02-21 18:52:52 +00:00
parent c9067f4142
commit 4a27bf19e8
8 changed files with 59 additions and 17 deletions
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19
libisoburn/trunk/xorriso/xorriso.c
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@@ -6524,11 +6524,13 @@ int Xorriso_genisofs(struct XorrisO *xorriso, char *whom,
if(adr[0]) {
if(strncmp(adr, "stdio:", 6)==0 && strncmp(adr, "stdio:/dev/fd/", 14)!=0) {
ret= Sfile_type(adr+6, 1);
if(ret==-1)
if(ret==-1) {
/* ok */;
else if(ret==1) {
/* >>> would prefer to do this later ... or leave it to libburn */;
#ifdef NIX
} else if(ret==1) {
/* <<< is now done in libisoburn by bit4 of Xorriso_option_dev() */
ret= truncate(adr+6, (off_t) 0);
if(ret==-1) {
@@ -6540,6 +6542,8 @@ int Xorriso_genisofs(struct XorrisO *xorriso, char *whom,
sprintf(xorriso->info_text, "-as %s: Truncated existing -o %s",
whom, Text_shellsafe(adr+6, sfe, 0));
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "NOTE", 0);
#endif /* NIX */
} else if(ret==2 || ret==3) {
sprintf(xorriso->info_text,
"-as %s: Cannot accept %s as target: -o %s",
@@ -6548,7 +6552,8 @@ int Xorriso_genisofs(struct XorrisO *xorriso, char *whom,
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
}
}
ret= Xorriso_option_dev(xorriso, adr, 2|8); /* overwriteable as blank */
/* Regard overwriteable as blank, truncate regular files on write start */
ret= Xorriso_option_dev(xorriso, adr, 2|8|16);
if(ret<=0)
goto ex;
}
@@ -7501,10 +7506,12 @@ int Xorriso_option_cut_out(struct XorrisO *xorriso, char *disk_path,
/* Options -dev , -indev, -outdev */
/** @param flag bit0=use as indev
/** @param flag bit0= use as indev
bit1= use as outdev
bit2= do not -reassure
bit3= regard overwriteable media as blank
bit4= if the drive is a regular disk file: truncate it to
the write start address
@return <=0 error , 1 success, 2 revoked by -reassure
*/
int Xorriso_option_dev(struct XorrisO *xorriso, char *in_adr, int flag)
@@ -7564,7 +7571,7 @@ int Xorriso_option_dev(struct XorrisO *xorriso, char *in_adr, int flag)
}
ret= Xorriso_give_up_drive(xorriso, flag&3);
} else
ret= Xorriso_aquire_drive(xorriso, adr, (flag&3)|((flag&8)>>1));
ret= Xorriso_aquire_drive(xorriso, adr, (flag&3)|((flag&(8|16))>>1));
if(ret<=0)
return(ret);
return(1);