commit b80be88

rc: Implement umask missing from 9front's version

  1@@ -0,0 +1,100 @@
  2+From 5f3ce26ce56378ff2bfd7662627a02c1be8da6ce Mon Sep 17 00:00:00 2001
  3+From: Michael Forney <mforney@mforney.org>
  4+Date: Sun, 19 Apr 2026 14:11:15 -0700
  5+Subject: [PATCH] implement umask builtin on unix
  6+
  7+---
  8+ exec.h |  2 +-
  9+ unix.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 10+ 2 files changed, 47 insertions(+), 1 deletion(-)
 11+
 12+diff --git a/exec.h b/exec.h
 13+index 69b1004..ee8edab 100644
 14+--- a/exec.h
 15++++ b/exec.h
 16+@@ -77,7 +77,7 @@ extern void (*builtinfunc(char *name))(void);
 17+ void execcd(void), execwhatis(void), execeval(void), execexec(void);
 18+ int execforkexec(void);
 19+ void execexit(void), execshift(void);
 20+-void execwait(void), execumask(void), execdot(void), execflag(void);
 21++void execwait(void), execdot(void), execflag(void);
 22+ void execfunc(var*), execcmds(io*, char*, var*, redir*);
 23+ void startfunc(var*, word*, var*, redir*);
 24+ 
 25+diff --git a/unix.c b/unix.c
 26+index 05d883c..cbb2054 100644
 27+--- a/unix.c
 28++++ b/unix.c
 29+@@ -12,9 +12,12 @@
 30+ #include <errno.h>
 31+ #include <fcntl.h>
 32+ #include <dirent.h>
 33++#include <limits.h>
 34++#include <sys/stat.h>
 35+ #include <sys/wait.h>
 36+ 
 37+ static void execfinit(void);
 38++static void execumask(void);
 39+ 
 40+ builtin Builtin[] = {
 41+ 	"cd",		execcd,
 42+@@ -24,6 +27,7 @@ builtin Builtin[] = {
 43+ 	"exit",		execexit,
 44+ 	"shift",	execshift,
 45+ 	"wait",		execwait,
 46++	"umask",	execumask,
 47+ 	".",		execdot,
 48+ 	"flag",		execflag,
 49+ 	"finit",	execfinit,
 50+@@ -81,6 +85,48 @@ execfinit(void)
 51+ 	start(rdfns, 2, runq->local, runq->redir);
 52+ }
 53+ 
 54++static int
 55++octal(char *s)
 56++{
 57++	int n = 0;
 58++
 59++	while(n<INT_MAX/8 && '0'<=*s && *s<='7')
 60++		n = n*8+*s++-'0';
 61++	return *s=='\0' ? n : -1;
 62++}
 63++
 64++static void
 65++execumask(void)
 66++{
 67++	int m;
 68++	struct io *out;
 69++	char *e;
 70++
 71++	switch(count(runq->argv->words)){
 72++	case 2:
 73++		m = octal(runq->argv->words->next->word);
 74++		if(m>=0 && m<=07777) {
 75++			umask(m);
 76++			break;
 77++		}
 78++		/* fallthrough */
 79++	default:
 80++		pfmt(err, "Usage: umask [umask]\n");
 81++		setstatus("umask usage");
 82++		poplist();
 83++		return;
 84++	case 1:
 85++		umask(m = umask(0));
 86++		out = openiofd(mapfd(1));
 87++		pfmt(out, "%o\n", m);
 88++		flushio(out);
 89++		free(closeiostr(out));
 90++		break;
 91++	}
 92++	setstatus("");
 93++	poplist();
 94++}
 95++
 96+ static int
 97+ cmpenv(const void *aa, const void *ab)
 98+ {
 99+-- 
100+2.49.0
101+

1@@ -1 +1 @@
2-7c49b6bc9d r0
3+3e907e648d r1