tdisable some programs, enable others. - plan9port - [fork] Plan 9 from user space
HTML git clone git://src.adamsgaard.dk/plan9port
DIR Log
DIR Files
DIR Refs
DIR README
DIR LICENSE
---
DIR commit 25b866dd062964c3260175b62f83fba374dfcdba
DIR parent 49c26cf71c21daf897b371b54230149c02896599
HTML Author: rsc <devnull@localhost>
Date: Thu, 4 Dec 2003 17:31:08 +0000
disable some programs, enable others.
Diffstat:
A src/cmd/mc.c | 244 +++++++++++++++++++++++++++++++
A src/cmd/vac/README | 3 +++
A src/cmd/venti/README | 3 +++
3 files changed, 250 insertions(+), 0 deletions(-)
---
DIR diff --git a/src/cmd/mc.c b/src/cmd/mc.c
t@@ -0,0 +1,244 @@
+/*
+ * mc - columnate
+ *
+ * mc[-][-LINEWIDTH][-t][file...]
+ * - causes break on colon
+ * -LINEWIDTH sets width of line in which to columnate(default 80)
+ * -t suppresses expanding multiple blanks into tabs
+ *
+ */
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <bio.h>
+#include <sys/ioctl.h>
+
+#define WIDTH 80
+#define TAB 4
+#define WORD_ALLOC_QUANTA 1024
+#define ALLOC_QUANTA 4096
+
+int linewidth=WIDTH;
+int colonflag=0;
+int tabflag=0; /* -t flag turned off forever */
+Rune *cbuf, *cbufp;
+Rune **word;
+int maxwidth=0;
+int nalloc=ALLOC_QUANTA;
+int nwalloc=WORD_ALLOC_QUANTA;
+int nchars=0;
+int nwords=0;
+Biobuf bin;
+Biobuf bout;
+
+void getwidth(void), readbuf(int), error(char *);
+void scanwords(void), columnate(void), morechars(void);
+
+void
+main(int argc, char *argv[])
+{
+ int i;
+ int lineset;
+ int ifd;
+
+ lineset = 0;
+ Binit(&bout, 1, OWRITE);
+ while(argc > 1 && argv[1][0] == '-'){
+ --argc; argv++;
+ switch(argv[0][1]){
+ case '\0':
+ colonflag = 1;
+ break;
+ case 't':
+ tabflag = 0;
+ break;
+ default:
+ linewidth = atoi(&argv[0][1]);
+ if(linewidth <= 1)
+ linewidth = WIDTH;
+ lineset = 1;
+ break;
+ }
+ }
+ if(lineset == 0)
+ getwidth();
+ cbuf = cbufp = malloc(ALLOC_QUANTA*(sizeof *cbuf));
+ word = malloc(WORD_ALLOC_QUANTA*(sizeof *word));
+ if(word == 0 || cbuf == 0)
+ error("out of memory");
+ if(argc == 1)
+ readbuf(0);
+ else{
+ for(i = 1; i < argc; i++){
+ if((ifd = open(*++argv, OREAD)) == -1)
+ fprint(2, "mc: can't open %s (%r)\n", *argv);
+ else{
+ readbuf(ifd);
+ Bflush(&bin);
+ close(ifd);
+ }
+ }
+ }
+ columnate();
+ exits(0);
+}
+void
+error(char *s)
+{
+ fprint(2, "mc: %s\n", s);
+ exits(s);
+}
+void
+readbuf(int fd)
+{
+ int lastwascolon = 0;
+ long c;
+ int linesiz = 0;
+
+ Binit(&bin, fd, OREAD);
+ do{
+ if(nchars++ >= nalloc)
+ morechars();
+ *cbufp++ = c = Bgetrune(&bin);
+ linesiz++;
+ if(c == '\t') {
+ cbufp[-1] = L' ';
+ while(linesiz%TAB != 0) {
+ if(nchars++ >= nalloc)
+ morechars();
+ *cbufp++ = L' ';
+ linesiz++;
+ }
+ }
+ if(colonflag && c == ':')
+ lastwascolon++;
+ else if(lastwascolon){
+ if(c == '\n'){
+ --nchars; /* skip newline */
+ *cbufp = L'\0';
+ while(nchars > 0 && cbuf[--nchars] != '\n')
+ ;
+ if(nchars)
+ nchars++;
+ columnate();
+ if (nchars)
+ Bputc(&bout, '\n');
+ Bprint(&bout, "%S", cbuf+nchars);
+ nchars = 0;
+ cbufp = cbuf;
+ }
+ lastwascolon = 0;
+ }
+ if(c == '\n')
+ linesiz = 0;
+ }while(c >= 0);
+}
+void
+scanwords(void)
+{
+ Rune *p, *q;
+ int i;
+
+ nwords=0;
+ maxwidth=0;
+ for(p = q = cbuf, i = 0; i < nchars; i++){
+ if(*p++ == L'\n'){
+ if(nwords >= nwalloc){
+ nwalloc += WORD_ALLOC_QUANTA;
+ if((word = realloc(word, nwalloc*sizeof(*word)))==0)
+ error("out of memory");
+ }
+ word[nwords++] = q;
+ p[-1] = L'\0';
+ if(p-q > maxwidth)
+ maxwidth = p-q;
+ q = p;
+ }
+ }
+}
+
+void
+columnate(void)
+{
+ int i, j;
+ int words_per_line;
+ int nlines;
+ int col;
+ int endcol;
+
+
+ scanwords();
+ if(nwords==0)
+ return;
+ words_per_line = linewidth/maxwidth;
+ if(words_per_line <= 0)
+ words_per_line = 1;
+ nlines=(nwords+words_per_line-1)/words_per_line;
+ for(i = 0; i < nlines; i++){
+ col = endcol = 0;
+ for(j = i; j < nwords; j += nlines){
+ endcol += maxwidth;
+ Bprint(&bout, "%S", word[j]);
+ col += word[j+1]-word[j]-1;
+ if(j+nlines < nwords){
+ if(tabflag) {
+ int tabcol = (col|(TAB-1))+1;
+ while(tabcol <= endcol){
+ Bputc(&bout, '\t');
+ col = tabcol;
+ tabcol += TAB;
+ }
+ }
+ while(col < endcol){
+ Bputc(&bout, ' ');
+ col++;
+ }
+ }
+ }
+ Bputc(&bout, '\n');
+ }
+}
+
+void
+morechars(void)
+{
+ nalloc += ALLOC_QUANTA;
+ if((cbuf = realloc(cbuf, nalloc*sizeof(*cbuf))) == 0)
+ error("out of memory");
+ cbufp = cbuf+nchars-1;
+}
+
+/*
+ * These routines discover the width of the display.
+ * It takes some work. If we do the easy calls to the
+ * draw library, the screen flashes due to repainting
+ * when mc exits.
+ */
+
+int
+windowrect(struct winsize *ws)
+{
+ int tty;
+
+ if((tty = open("/dev/tty", OWRITE)) < 0)
+ tty = 1;
+
+ if(ioctl(tty, TIOCGWINSZ, ws) < 0){
+ if(tty != 1)
+ close(tty);
+ return -1;
+ }
+ if(tty != 1)
+ close(tty);
+ return 0;
+}
+
+void
+getwidth(void)
+{
+ struct winsize ws;
+
+ if(windowrect(&ws) < 0)
+ return;
+ linewidth = ws.ws_col;
+}
DIR diff --git a/src/cmd/vac/README b/src/cmd/vac/README
t@@ -0,0 +1,3 @@
+This is very buggered.
+Just here for reference for now.
+
DIR diff --git a/src/cmd/venti/README b/src/cmd/venti/README
t@@ -0,0 +1,3 @@
+This is very untested.
+It runs on FreeBSD but that's about all I've checked.
+