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ash: implement "exec -a ARGV0 CMD ARGV1..."

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function                                             old     new   delta
execcmd                                               71     112     +41
shellexec                                            221     224      +3
evalcommand                                         1158    1161      +3
localcmd                                             364     366      +2
unaliascmd                                           163     154      -9
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(add/remove: 0/0 grow/shrink: 4/1 up/down: 49/-9)              Total: 40 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2017-04-12 21:31:32 +02:00
parent e139ae307e
commit 6c149f4d9a
1 changed files with 15 additions and 7 deletions
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22
shell/ash.c
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@ -3345,11 +3345,9 @@ unaliascmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
int i;
while ((i = nextopt("a")) != '\0') {
if (i == 'a') {
rmaliases();
return 0;
}
while (nextopt("a") != '\0') {
rmaliases();
return 0;
}
for (i = 0; *argptr; argptr++) {
if (unalias(*argptr)) {
@ -9354,7 +9352,14 @@ truecmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
static int FAST_FUNC
execcmd(int argc UNUSED_PARAM, char **argv)
{
if (argv[1]) {
optionarg = NULL;
while (nextopt("a:") != '\0')
/* nextopt() sets optionarg to "-a ARGV0" */;
argv = argptr;
if (argv[0]) {
char *prog;
iflag = 0; /* exit on error */
mflag = 0;
optschanged();
@ -9370,7 +9375,10 @@ execcmd(int argc UNUSED_PARAM, char **argv)
/*setsignal(SIGTSTP); - unnecessary because of mflag=0 */
/*setsignal(SIGTTOU); - unnecessary because of mflag=0 */
shellexec(argv[1], argv + 1, pathval(), 0);
prog = argv[0];
if (optionarg)
argv[0] = optionarg;
shellexec(prog, argv, pathval(), 0);
/* NOTREACHED */
}
return 0;