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/*
* Copyright (c) 1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND CARNEGIE MELLON UNIVERSITY
* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT
* SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Users of this software agree to return to Carnegie Mellon any
* improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* Export of this software is permitted only after complying with the
* regulations of the U.S. Deptartment of Commerce relating to the
* Export of Technical Data.
*/
/* wantwrite -- attempt to open file for output
*
* Usage: i = wantwrite (path,file,fullname,prompt,warn);
* int i,warn;
* char *path,*file,*fullname,*prompt;
*
* Wantwrite will attempt to open "file" for output somewhere in
* the pathlist "path". If no such file can be created, the user
* is given an oportuity to enter a new file name (after the
* prompt is printed). The new file will then be sought using
* the same path.
* If the path is the null string, the file will be created with
* no prefix to the file name. If the file name is null, the
* user will be prompted for a file name immediately. The user
* can always abort wantwrite by typing just a carriage return
* to the prompt.
* Wantwrite will put the name of the successfully created file
* into the "fullname" string (which must therefore be long enough to
* hold a complete file name), and return its file descriptor;
* if no file is created, -1 will be returned.
* Wantwrite examines each entry in the path, to see if the
* desired file can be created there. If "warn" is true,
* wantwrite will first check to ensure that no such file
* already exists (if it does, the user is allowed to keep it).
* If no such file exists (or the user wants to delete it), then
* wantwrite attempts to create the file. If it is unsuccessful,
* the next entry in the pathlist is examined in the same way.
*
* HISTORY
* $Log: wantwrite.c,v $
* Revision 1.2 90/12/11 18:01:02 mja
* Add copyright/disclaimer for distribution.
*
* 30-Apr-85 Steven Shafer (sas) at Carnegie-Mellon University
* Adapted for 4.2 BSD UNIX: New open call, output moved to stderr.
*
* 21-Oct-81 Fil Alleva (faa) at Carnegie-Mellon University
* Fixed bug which caused an infinite loop when getstr() got
* an EOT error and returned NULL. The error return was ignored
* and the value of "answer" was not changed which caused the loop.
*
* 20-Nov-79 Steven Shafer (sas) at Carnegie-Mellon University
* Rewritten for VAX.
*
*/
#include <stdio.h>
#include <sys/file.h>
int strcmp();
int creat();
int searchp();
char *getstr();
static int warnflag;
static int fildes;
static int func (fnam)
char *fnam;
{ /* attempt to create fnam */
register int goahead;
goahead = 1;
if (warnflag) {
fildes = open (fnam,O_WRONLY,0);
if (fildes >= 0) {
close (fildes);
fprintf (stderr,"%s already exists! ",fnam);
goahead = getbool ("Delete old file?",0);
}
}
if (goahead) {
fildes = open (fnam,(O_WRONLY|O_CREAT|O_TRUNC),0644);
if (fildes < 0) {
goahead = 0;
}
}
return (!goahead);
}
int wantwrite (path,file,fullname,prompt,warn)
char *path,*file,*fullname,*prompt;
int warn;
{
register int i;
char myfile [2000], *retval;
fflush (stdout);
if (*file == '\0') {
getstr (prompt,"no file",myfile);
if (strcmp(myfile,"no file") == 0) return (-1);
}
else strcpy (myfile,file);
warnflag = warn;
do {
i = searchp (path,myfile,fullname,func);
if (i < 0) {
if (*path && (*myfile != '/')) {
fprintf (stderr,"%s in path \"%s\": Can't create.\n",myfile,path);
}
else {
perror (myfile);
}
retval = getstr (prompt,"no file",myfile);
if ((strcmp(myfile,"no file") == 0) || retval == NULL)
return (-1);
}
}
while (i < 0);
return (fildes);
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.