dany/u-boot-megous
1
0
Fork 0
mirror of https://xff.cz/git/u-boot/ synced 2025-09-01 16:52:14 +02:00
Code Issues Packages Projects Releases Wiki Activity

common: command: Add support for $ auto-completion

Browse Source 
Add the dollar_complete() function to auto-complete arguments starting
with a '$' and use it in the cmd_auto_complete() path such that all
args starting with a $ can be auto-completed based on the available env
vars.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
[trini: Fix some linking problems]
Signed-off-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Boris Brezillon
2018-12-05 09:26:50 +01:00
committed by Tom Rini
parent 31a2cf1ca4
commit 03dcf17dba
4 changed files with 77 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
env/common.c vendored
View File

@@ -240,32 +240,76 @@ void env_relocate(void)
}
}
#if defined(CONFIG_AUTO_COMPLETE) && !defined(CONFIG_SPL_BUILD)
int env_complete(char *var, int maxv, char *cmdv[], int bufsz, char *buf)
#ifdef CONFIG_AUTO_COMPLETE
int env_complete(char *var, int maxv, char *cmdv[], int bufsz, char *buf,
bool dollar_comp)
{
ENTRY *match;
int found, idx;
if (dollar_comp) {
/*
* When doing $ completion, the first character should
* obviously be a '$'.
*/
if (var[0] != '$')
return 0;
var++;
/*
* The second one, if present, should be a '{', as some
* configuration of the u-boot shell expand ${var} but not
* $var.
*/
if (var[0] == '{')
var++;
else if (var[0] != '\0')
return 0;
}
idx = 0;
found = 0;
cmdv[0] = NULL;
while ((idx = hmatch_r(var, idx, &match, &env_htab))) {
int vallen = strlen(match->key) + 1;
if (found >= maxv - 2 || bufsz < vallen)
if (found >= maxv - 2 ||
bufsz < vallen + (dollar_comp ? 3 : 0))
break;
cmdv[found++] = buf;
/* Add the '${' prefix to each var when doing $ completion. */
if (dollar_comp) {
strcpy(buf, "${");
buf += 2;
bufsz -= 3;
}
memcpy(buf, match->key, vallen);
buf += vallen;
bufsz -= vallen;
if (dollar_comp) {
/*
* This one is a bit odd: vallen already contains the
* '\0' character but we need to add the '}' suffix,
* hence the buf - 1 here. strcpy() will add the '\0'
* character just after '}'. buf is then incremented
* to account for the extra '}' we just added.
*/
strcpy(buf - 1, "}");
buf++;
}
}
qsort(cmdv, found, sizeof(cmdv[0]), strcmp_compar);
if (idx)
cmdv[found++] = "...";
cmdv[found++] = dollar_comp ? "${...}" : "...";
cmdv[found] = NULL;
return found;