Promote the old installer/livecd specific tools to normal tools under /sys/src/cmd. Where similar common tools already existed, I kept them.

1 files changed, 133 insertions, 0 deletions

diff --git a/sys/src/cmd/aux/cdsh.c b/sys/src/cmd/aux/cdsh.c
new file mode 100644
index 000000000..2162350bf
--- /dev/null
+++ b/sys/src/cmd/aux/cdsh.c
@@ -0,0 +1,133 @@
+/*
+ * The `cd' shell.  
+ * Just has cd and lc.
+ */
+
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+
+char *pwd;
+char *root = "/";
+
+void
+usage(void)
+{
+	fprint(2, "usage: cdsh [-r root]\n");
+	exits("usage");
+}
+
+int
+system(char *cmd)
+{
+	int pid;
+	if((pid = fork()) < 0)
+		return -1;
+
+	if(pid == 0) {
+		dup(2, 1);
+		execl("/bin/rc", "rc", "-c", cmd, nil);
+		exits("exec");
+	}
+	waitpid();
+	return 0;
+}
+
+int
+cd(char *s)
+{
+	char *newpwd;
+	int l;
+
+	if(s[0] == '/') {
+		cleanname(s);
+		newpwd = strdup(s);
+	} else {
+		l = strlen(pwd)+1+strlen(s)+1+50;	/* 50 = crud for unicode mistakes */
+		newpwd = malloc(l);
+		snprint(newpwd, l, "%s/%s", pwd, s);
+		cleanname(newpwd);
+		assert(newpwd[0] == '/');
+	}
+
+	if(chdir(root) < 0 || (newpwd[1] != '\0' && chdir(newpwd+1) < 0)) {
+		chdir(root);
+		chdir(pwd+1);
+		free(newpwd);
+		return -1;
+	} else {
+		free(pwd);
+		pwd = newpwd;
+		return 0;
+	}
+}
+
+void
+main(int argc, char **argv)
+{
+	char *p;
+	Biobuf bin;
+	char *f[2];
+	int nf;
+
+	ARGBEGIN{
+	case 'r':
+		root = ARGF();
+		if(root == nil)
+			usage();
+		if(root[0] != '/') {
+			fprint(2, "root must be rooted\n");
+			exits("root");
+		}
+		break;
+	default:
+		usage();
+	}ARGEND;
+
+	if(argc != 0)
+		usage();
+
+	cleanname(root);
+	if(cd("/") < 0) {
+		fprint(2, "cannot cd %s: %r\n", root);
+		exits("root");
+	}
+
+	Binit(&bin, 0, OREAD);
+	while(fprint(2, "%s%% ", pwd), (p = Brdline(&bin, '\n'))) {
+		p[Blinelen(&bin)-1] = '\0';
+		nf = tokenize(p, f, nelem(f));
+		if(nf < 1)
+			continue;
+		if(strcmp(f[0], "exit") == 0)
+			break;
+		if(strcmp(f[0], "lc") == 0) {
+			if(nf == 1) {
+				if(system("/bin/lc") < 0)
+					fprint(2, "lc: %r\n");
+			} else if(nf == 2) {
+				if(strpbrk(p, "'`{}^@$#&()|\\;><"))
+					fprint(2, "no shell characters allowed\n");
+				else {
+					p = f[1];
+					*--p = ' ';
+					*--p = 'c';
+					*--p = 'l';
+					if(system(p) < 0)
+						fprint(2, "lc: %r\n");
+				}
+			}
+			continue;
+		}
+		if(strcmp(f[0], "cd") == 0) {
+			if(nf < 2)
+				fprint(2, "usage: cd dir\n");
+			else if(cd(f[1]) < 0)
+				fprint(2, "cd: %r\n");
+			continue;
+		}
+		fprint(2, "commands are cd, lc, and exit\n");
+	}
+
+	print("%s\n", pwd);
+}