/*
* sys V fileio.c
*/
#include "def.h"
static FILE *ffp;
extern char *getenv();
char *adjustname();
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/dir.h>
/*
* Open a file for reading.
*/
ffropen(fn, bp) char *fn; BUFFER *bp; {
struct stat statbuf;
if ((ffp=fopen(fn, "r")) == NULL)
return (FIOFNF);
if (bp && fstat(fileno(ffp), &statbuf) == 0) {
/* set highorder bit to make sure this isn't all zero */
bp->b_fi.fi_mode = statbuf.st_mode | 0x8000;
bp->b_fi.fi_uid = statbuf.st_uid;
bp->b_fi.fi_gid = statbuf.st_gid;
}
return (FIOSUC);
}
/*
* Open a file for writing.
* Return TRUE if all is well, and
* FALSE on error (cannot create).
*/
ffwopen(fn, bp) char *fn; BUFFER *bp; {
if ((ffp=fopen(fn, "w")) == NULL) {
ewprintf("Cannot open file for writing");
return (FIOERR);
}
/*
* If we have file information, use it. We don't bother
* to check for errors, because there's no a lot we can do
* about it. Certainly trying to change ownership will fail
* if we aren' root. That's probably OK. If we don't have
* info, no need to get it, since any future writes will do
* the same thing.
*/
if (bp && bp->b_fi.fi_mode) {
chmod(fn, bp->b_fi.fi_mode & 07777);
chown(fn, bp->b_fi.fi_uid, bp->b_fi.fi_gid);
}
return (FIOSUC);
}
/*
* Close a file.
* Should look at the status.
*/
ffclose() {
(VOID) fclose(ffp);
return (FIOSUC);
}
/*
* Write a buffer to the already
* opened file. bp points to the
* buffer. Return the status.
* Check only at the newline and
* end of buffer.
*/
ffputbuf(bp)
BUFFER *bp;
{
register char *cp;
register char *cpend;
register LINE *lp;
register LINE *lpend;
lpend = bp->b_linep;
lp = lforw(lpend);
do {
cp = <ext(lp)[0]; /* begining of line */
cpend = &cp[llength(lp)]; /* end of line */
while(cp != cpend) {
putc(*cp, ffp);
cp++; /* putc may evalualte arguments more than once */
}
lp = lforw(lp);
if(lp == lpend) break; /* no implied newline on last line */
putc('\n', ffp);
} while(!ferror(ffp));
if(ferror(ffp)) {
ewprintf("Write I/O error");
return FIOERR;
}
return FIOSUC;
}
/*
* Read a line from a file, and store the bytes
* in the supplied buffer. Stop on end of file or end of
* line. When FIOEOF is returned, there is a valid line
* of data without the normally implied \n.
*/
ffgetline(buf, nbuf, nbytes)
register char *buf;
register int nbuf;
register int *nbytes;
{
register int c;
register int i;
i = 0;
while((c = getc(ffp))!=EOF && c!='\n') {
buf[i++] = c;
if (i >= nbuf) return FIOLONG;
}
if (c == EOF && ferror(ffp) != FALSE) {
ewprintf("File read error");
return FIOERR;
}
*nbytes = i;
return c==EOF ? FIOEOF : FIOSUC;
}
#ifndef NO_BACKUP
/*
* Rename the file "fname" into a backup
* copy. On Unix the backup has the same name as the
* original file, with a "~" on the end; this seems to
* be newest of the new-speak. The error handling is
* all in "file.c". The "unlink" is perhaps not the
* right thing here; I don't care that much as
* I don't enable backups myself.
*/
fbackupfile(fn) char *fn; {
register char *nname;
char *malloc(), *strrchr();
int i;
char *lastpart;
if ((nname=malloc((unsigned)(strlen(fn)+1+1))) == NULL) {
ewprintf("Can't get %d bytes", strlen(fn) + 1);
return (ABORT);
}
(void) strcpy(nname, fn);
/*
* with BSD, just strcat the ~. But SV has a max file name of 14, so
* we have to check.
*/
lastpart = strrchr(nname, '/');
if (lastpart)
lastpart++;
else
lastpart = nname;
i = strlen(lastpart);
if (i > 13)
if (lastpart[13] == '~') { /* already a backup name */
free(nname);
return(FALSE);
}
else
lastpart[13] = '~';
else {
lastpart[i] = '~';
lastpart[i+1] = 0;
}
(void) unlink(nname); /* Ignore errors. */
if (link(fn, nname) != 0 || unlink(fn) != 0) {
free(nname);
return (FALSE);
}
free(nname);
return (TRUE);
}
#endif
/*
* The string "fn" is a file name.
* Perform any required appending of directory name or case adjustments.
* If NO_DIR is not defined, the same file should be refered to even if the
* working directory changes.
*/
#ifdef SYMBLINK
#include <sys/types.h>
#include <sys/stat.h>
#ifndef MAXLINK
#define MAXLINK 8 /* maximum symbolic links to follow */
#endif
#endif
#include <pwd.h>
#ifndef NO_DIR
extern char *wdir;
#endif
char *adjustname(fn)
register char *fn;
{
register char *cp;
static char fnb[NFILEN];
extern struct passwd *getpwnam();
struct passwd *pwent;
#ifdef SYMBLINK
struct stat statbuf;
int i, j;
char linkbuf[NFILEN];
#endif
switch(*fn) {
case '/':
cp = fnb;
*cp++ = *fn++;
break;
case '~':
fn++;
if(*fn == '/' || *fn == '\0') {
(VOID) strcpy(fnb, getenv("HOME"));
cp = fnb + strlen(fnb);
if(*fn) fn++;
break;
} else {
cp = fnb;
while(*fn && *fn != '/') *cp++ = *fn++;
*cp = '\0';
if((pwent = getpwnam(fnb)) != NULL) {
(VOID) strcpy(fnb, pwent->pw_dir);
cp = fnb + strlen(fnb);
break;
} else {
fn -= strlen(fnb) + 1;
/* can't find ~user, continue to default case */
}
}
default:
#ifndef NODIR
strcpy(fnb, wdir);
cp = fnb + strlen(fnb);
break;
#else
return fn; /* punt */
#endif
}
if(cp != fnb && cp[-1] != '/') *cp++ = '/';
while(*fn) {
switch(*fn) {
case '.':
switch(fn[1]) {
case '\0':
*--cp = '\0';
return fnb;
case '/':
fn += 2;
continue;
case '.':
if(fn[2]=='/' || fn[2] == '\0') {
#ifdef SYMBLINK
cp[-1] = '\0';
for(j = MAXLINK; j-- &&
lstat(fnb, &statbuf) != -1 &&
(statbuf.st_mode&S_IFMT) == S_IFLNK &&
(i = readlink(fnb, linkbuf, sizeof linkbuf))
!= -1 ;) {
if(linkbuf[0] != '/') {
--cp;
while(cp > fnb && *--cp != '/') {}
++cp;
(VOID) strncpy(cp, linkbuf, i);
cp += i;
} else {
(VOID) strncpy(fnb, linkbuf, i);
cp = fnb + i;
}
if(cp[-1]!='/') *cp++ = '\0';
else cp[-1] = '\0';
}
cp[-1] = '/';
#endif
--cp;
while(cp > fnb && *--cp != '/') {}
++cp;
if(fn[2]=='\0') {
*--cp = '\0';
return fnb;
}
fn += 3;
continue;
}
break;
default:
break;
}
break;
case '/':
fn++;
continue;
default:
break;
}
while(*fn && (*cp++ = *fn++) != '/') {}
}
if(cp[-1]=='/') --cp;
*cp = '\0';
return fnb;
}
#ifndef NO_STARTUP
#include <sys/file.h>
#define F_OK 04 /* for stupid Sys V */
/*
* Find a startup file for the user and return its name. As a service
* to other pieces of code that may want to find a startup file (like
* the terminal driver in particular), accepts a suffix to be appended
* to the startup file name.
*/
char *
startupfile(suffix)
char *suffix;
{
register char *file;
static char home[NFILEN];
char *getenv();
if ((file = getenv("HOME")) == NULL) goto notfound;
if (strlen(file)+7 >= NFILEN - 1) goto notfound;
(VOID) strcpy(home, file);
(VOID) strcat(home, "/.mg");
if (suffix != NULL) {
(VOID) strcat(home, "-");
(VOID) strcat(home, suffix);
}
if (access(home, F_OK) == 0) return home;
notfound:
#ifdef STARTUPFILE
file = STARTUPFILE;
if (suffix != NULL) {
(VOID) strcpy(home, file);
(VOID) strcat(home, "-");
(VOID) strcat(home, suffix);
file = home;
}
if (access(file, F_OK ) == 0) return file;
#endif
return NULL;
}
#endif
#ifndef NO_DIRED
#include "kbd.h"
/*
* It's sort of gross to call system commands in a subfork. However
* that's by far the easiest way. These things are used only in
* dired, so they are not performance-critical. The cp program is
* almost certainly faster at copying files than any stupid code that
* we would write. In fact there is no other way to do unlinkdir.
* You don't want to do a simple unlink. To do the whole thing in
* a general way requires root, and rmdir is setuid. We don't really
* want microemacs to have to run setuid. rename is easy to do with
* unlink, link, unlink. However that code will fail if the destination
* is on a different file system. mv will copy in that case. It seems
* easier to let mv worry about this stuff.
*/
copy(frname, toname)
char *frname, *toname;
{
int pid;
int status;
if(pid = fork()) {
if(pid == -1) return -1;
execl("/bin/cp", "cp", frname, toname, (char *)NULL);
_exit(1); /* shouldn't happen */
}
while(wait(&status) != pid)
;
return status == 0;
}
BUFFER *dired_(dirname)
char *dirname;
{
register BUFFER *bp;
char line[256];
BUFFER *findbuffer();
FILE *dirpipe;
FILE *popen();
char *strncpy();
if((dirname = adjustname(dirname)) == NULL) {
ewprintf("Bad directory name");
return NULL;
}
if((bp = findbuffer(dirname)) == NULL) {
ewprintf("Could not create buffer");
return NULL;
}
if(bclear(bp) != TRUE) return FALSE;
(VOID) strcpy(line, "ls -al ");
(VOID) strcpy(&line[7], dirname);
if((dirpipe = popen(line, "r")) == NULL) {
ewprintf("Problem opening pipe to ls");
return NULL;
}
line[0] = line[1] = ' ';
while(fgets(&line[2], 254, dirpipe) != NULL) {
line[strlen(line) - 1] = '\0'; /* remove ^J */
(VOID) addline(bp, line);
}
if(pclose(dirpipe) == -1) {
ewprintf("Problem closing pipe to ls");
return NULL;
}
bp->b_dotp = lforw(bp->b_linep); /* go to first line */
(VOID) strncpy(bp->b_fname, dirname, NFILEN);
if((bp->b_modes[0] = name_mode("dired")) == NULL) {
bp->b_modes[0] = &map_table[0];
ewprintf("Could not find mode dired");
return NULL;
}
bp->b_nmodes = 0;
return bp;
}
d_makename(lp, fn)
register LINE *lp;
register char *fn;
{
register char *cp;
if(llength(lp) <= 56) return ABORT;
(VOID) strcpy(fn, curbp->b_fname);
cp = fn + strlen(fn);
bcopy(&lp->l_text[56], cp, llength(lp) - 56);
cp[llength(lp) - 56] = '\0';
return lgetc(lp, 2) == 'd';
}
/*
* I, a System V novice, could only figure out how to do unlinkdir()
* and rename() as exec's of the appropriate functions. So sue me.
* --Stephen Walton, December 1987
*/
unlinkdir(f)
char *f;
{
int status, pid, wpid;
if ((pid = fork()) == 0)
execl("/bin/rmdir", "rmdir", f, (char *)NULL);
else if (pid > 0)
while ((wpid = wait(&status)) && wpid != pid)
;
else
return FALSE;
return status == 0;
}
Xrename(f1, f2)
char *f1, *f2;
{
int status, pid, wpid;
if ((pid = fork()) == 0)
execl("/bin/mv", "mv", f1, f2, (char *)NULL);
else if (pid > 0)
while ((wpid = wait(&status)) && wpid != pid)
;
else
return FALSE;
return status == 0;
}
#endif NO_DIRED
struct filelist {
LIST fl_l;
char fl_name[NFILEN+2];
};
/* these things had better be contiguous, because we're going
* to refer to the end of dirbuf + 1 byte */
struct direct dirbuf;
char dirdummy;
/*
* return list of file names that match the name in buf.
* System V version. listing is a flag indicating whether the
* list is being used for printing a listing rather than
* completion. In that case, trailing * and / are put on
* for executables and directories. The list is not sorted.
*/
LIST *make_file_list(buf,listing)
char *buf;
int listing;
{
char *dir,*file,*cp;
int len,i,preflen;
int fp;
LIST *last,*l1,*l2;
struct filelist *current;
char prefixx[NFILEN+1];
extern int errno;
struct stat statbuf;
char statname[NFILEN+2];
/* We need three different strings:
* dir - the name of the directory containing what the user typed.
* Must be a real unix file name, e.g. no ~user, etc.. Must
* not end in /.
* prefix - the portion of what the user typed that is before
* the names we are going to find in the directory. Must have
* a trailing / if the user typed it.
* names from the directory.
* we open dir, and return prefix concatenated with names.
*/
/* first we get a directory name we can look up */
/* names ending in . are potentially odd, because adjustname
* will treat foo/.. as a reference to another directory,
* whereas we are interested in names starting with ..
*/
len = strlen(buf);
if (buf[len-1] == '.') {
buf[len-1] = 'x';
dir = adjustname(buf);
buf[len-1] = '.';
}
else
dir = adjustname(buf);
/*
* if the user typed a trailing / or the empty string
* he wants us to use his file spec as a directory name
*/
if (buf[0] && buf[strlen(buf)-1] != '/') {
file = strrchr(dir, '/');
if (file) {
*file = 0;
if (*dir == 0)
dir = "/";
}
else {
return(NULL);
}
}
/* now we get the prefix of the name the user typed */
strcpy(prefixx,buf);
cp = strrchr(prefixx, '/');
if (cp == NULL)
prefixx[0] = 0;
else
cp[1] = 0;
preflen = strlen(prefixx);
/* cp is the tail of buf that really needs to be compared */
cp = buf + preflen;
len = strlen(cp);
/*
* Now make sure that file names will fit in the buffers allocated.
* SV files are fairly short. For BSD, something more general
* would be required.
*/
if ((preflen + DIRSIZ) > NFILEN)
return(NULL);
if ((strlen(dir) + DIRSIZ) > NFILEN)
listing = 0;
/* loop over the specified directory, making up the list of files */
/*
* Note that it is worth our time to filter out names that don't
* match, even though our caller is going to do so again, and to
* avoid doing the stat if completion is being done, because stat'ing
* every file in the directory is relatively expensive.
*/
fp = open(dir,0);
if (fp < 0) {
return(NULL);
}
last = NULL;
/* clear entry after last so we can treat d_name as ASCIZ */
dirbuf.d_name[DIRSIZ] = 0;
while (1) {
if (read(fp, &dirbuf, sizeof(struct direct)) <= 0) {
break;
}
if (dirbuf.d_ino == 0) /* entry not allocated */
continue;
for (i=0; i<len; ++i) {
if (cp[i] != dirbuf.d_name[i])
break;
}
if (i < len)
continue;
current = (struct filelist *)malloc(sizeof(struct filelist));
current->fl_l.l_next = last;
current->fl_l.l_name = current->fl_name;
last = (LIST *)current;
strcpy(current->fl_name,prefixx);
strcat(current->fl_name,dirbuf.d_name);
if (listing) {
statbuf.st_mode = 0;
strcpy(statname,dir);
strcat(statname,"/");
strcat(statname,dirbuf.d_name);
stat(statname,&statbuf);
if (statbuf.st_mode & 040000)
strcat(current->fl_name,"/");
else if (statbuf.st_mode & 0100)
strcat(current->fl_name,"*");
}
}
close(fp);
return (last);
}