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authorGravatar Eric Andersen <andersen@codepoet.org>2001-07-31 21:38:23 +0000
committerGravatar Eric Andersen <andersen@codepoet.org>2001-07-31 21:38:23 +0000
commitfa1c5aac51c5e4f880f72ffc66d409d61706ad8a (patch)
tree3b707d1edbcaa0b6eb69e8b568976f75601ac498 /shell
parent73f6a1b058e994a44820b3ee987b04d14f05051d (diff)
downloadbusybox-fa1c5aac51c5e4f880f72ffc66d409d61706ad8a.tar.gz
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Fix the let builtin (so we can close bug #1196) and remove the
nonstandard exp builtin. -Erik
Diffstat (limited to 'shell')
-rw-r--r--shell/ash.c76
1 files changed, 28 insertions, 48 deletions
diff --git a/shell/ash.c b/shell/ash.c
index 9a5435e8b..15e1adb7c 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -1593,9 +1593,6 @@ __lookupalias(const char *name) {
#define ARITH_BNOT 281
static void expari (int);
-/* From arith.y */
-static long ash_arith(const char *p);
-static int expcmd (int , char **);
#endif
static char *trap[NSIG]; /* trap handler commands */
@@ -1647,7 +1644,7 @@ static int waitcmd (int, char **);
static int ulimitcmd (int, char **);
static int timescmd (int, char **);
#ifdef ASH_MATH_SUPPORT
-static int expcmd (int, char **);
+static int letcmd (int, char **);
#endif
static int typecmd (int, char **);
#ifdef ASH_GETOPTS
@@ -1706,9 +1703,6 @@ static const struct builtincmd builtincmds[] = {
{ BUILTIN_SPECIAL "eval", evalcmd },
{ BUILTIN_SPECIAL "exec", execcmd },
{ BUILTIN_SPECIAL "exit", exitcmd },
-#ifdef ASH_MATH_SUPPORT
- { BUILTIN_NOSPEC "exp", expcmd },
-#endif
{ BUILTIN_SPEC_ASSG "export", exportcmd },
{ BUILTIN_REGULAR "false", false_main },
{ BUILTIN_REGULAR "fc", histcmd },
@@ -1725,7 +1719,7 @@ static const struct builtincmd builtincmds[] = {
{ BUILTIN_REGULAR "kill", killcmd },
#endif
#ifdef ASH_MATH_SUPPORT
- { BUILTIN_NOSPEC "let", expcmd },
+ { BUILTIN_REGULAR "let", letcmd },
#endif
{ BUILTIN_ASSIGN "local", localcmd },
#ifndef BB_PWD
@@ -4883,7 +4877,9 @@ expari(int flag)
removerecordregions(begoff);
if (quotes)
rmescapes(p+2);
- result = ash_arith(p+2);
+ result = arith(p+2);
+ if (result < 0)
+ error("arith: syntax error: \"%s\"\n", p+2);
snprintf(p, 12, "%d", result);
while (*p++)
@@ -12878,7 +12874,7 @@ findvar(struct var **vpp, const char *name)
/*
* Copyright (c) 1999 Herbert Xu <herbert@debian.org>
* This file contains code for the times builtin.
- * $Id: ash.c,v 1.14 2001/07/30 21:41:37 andersen Exp $
+ * $Id: ash.c,v 1.15 2001/07/31 21:38:23 andersen Exp $
*/
static int timescmd (int argc, char **argv)
{
@@ -12900,45 +12896,29 @@ static int timescmd (int argc, char **argv)
#ifdef ASH_MATH_SUPPORT
-/* The exp(1) builtin. */
-int expcmd(int argc, char **argv)
-{
- const char *p;
- char *concat;
- char **ap;
- long i;
-
- if (argc > 1) {
- p = argv[1];
- if (argc > 2) {
- /* concatenate arguments */
- STARTSTACKSTR(concat);
- ap = argv + 2;
- for (;;) {
- while (*p)
- STPUTC(*p++, concat);
- if ((p = *ap++) == NULL)
- break;
- STPUTC(' ', concat);
- }
- STPUTC('\0', concat);
- p = grabstackstr(concat);
+/* The let builtin. */
+int letcmd(int argc, char **argv)
+{
+ long result=0;
+ if (argc == 2) {
+ char *tmp, *expression, p[13];
+ expression = strchr(argv[1], '=');
+ if (!expression) {
+ out2fmt("sh: let: syntax error: \"%s\"\n", argv[1]);
+ return 0;
}
- } else
- p = "";
-
- i = ash_arith(p);
-
- printf("%ld\n", i);
- return (! i);
-}
-
-static long ash_arith(const char *p)
-{
- long i = arith(p);
- if (i <0)
- error("arith: syntax error: \"%s\"\n", p);
- return i;
+ *expression = '\0';
+ tmp = ++expression;
+ result = arith(tmp);
+ if (result < 0) {
+ out2fmt("sh: let: syntax error: \"%s=%s\"\n", argv[1], expression);
+ return 0;
+ }
+ snprintf(p, 12, "%ld", result);
+ setvar(argv[1], savestr(p), 0);
+ } else if (argc >= 3)
+ synerror("invalid operand");
+ return !result;
}
#endif