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Add support for displaying prefixes as well as setting them with prefix builtin

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This commit is contained in:
Stephen Heumann 2015-02-07 11:26:54 -06:00
parent 0d0ec552b5
commit 46abe82986
1 changed files with 71 additions and 18 deletions
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89
shell/hush.c
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@ -112,6 +112,7 @@
#ifdef __GNO__
# include <gsos.h>
# include <orca.h>
# define setpgid setpgid_is_broken_on_gno_206
/* setpgid is broken in GNO 2.0.6: It doesn't actually change the pgrp for
* the process (but it does update the pgrp reference counts, effectively
@ -997,6 +998,9 @@ static const struct built_in_command bltins1[] = {
#endif
#if HUSH_DEBUG
BLTIN("memleak" , builtin_memleak , NULL),
#endif
#ifdef __GNO__
BLTIN("prefix" , builtin_prefix , "Display or set GS/OS prefixes"),
#endif
BLTIN("read" , builtin_read , "Input into variable"),
#if ENABLE_HUSH_FUNCTIONS
@ -1016,9 +1020,6 @@ static const struct built_in_command bltins1[] = {
BLTIN("umask" , builtin_umask , "Set file creation mask"),
BLTIN("unset" , builtin_unset , "Unset variables"),
BLTIN("wait" , builtin_wait , "Wait for process"),
#ifdef __GNO__
BLTIN("prefix" , builtin_prefix , "Set GS/OS prefixes"),
#endif
};
/* For now, echo and test are unconditionally enabled.
* Maybe make it configurable? */
@ -10009,33 +10010,85 @@ static int FAST_FUNC builtin_return(char **argv)
#ifdef __GNO__
static int FAST_FUNC builtin_prefix(char **argv)
{
unsigned prefix;
PrefixRecGS prefixrec;
int prefix = -2, maxprefix = 31; /* -2 means * prefix */
PrefixRecGS prefixrec = {2};
int argc = 0;
if (!argv[1] || !argv[2] || argv[3]) {
while (argv[argc])
argc++;
if (argc > 3) {
bb_error_msg("%s: invalid arguments", argv[0]);
return EXIT_FAILURE;
};
if (argc >= 2) {
errno = 0;
if (strcmp(argv[1], "@") == 0) {
prefix = maxprefix = -1;
} else if (argc == 2 && strcmp(argv[1], "*") == 0) {
prefix = maxprefix = -2;
} else {
prefix = maxprefix = bb_strtoi(argv[1], NULL, 10);
if (errno || prefix > 31 || prefix < 0) {
bb_error_msg("%s: invalid prefix number '%s'", argv[0], argv[1]);
return EXIT_FAILURE;
}
}
}
errno = 0;
prefix = bb_strtou(argv[1], NULL, 10);
if (errno || prefix > 31) {
bb_error_msg("%s: invalid prefix number '%s'", argv[0], argv[1]);
return EXIT_FAILURE;
if (argc == 3) {
/* set a prefix */
prefixrec.prefixNum = prefix;
prefixrec.buffer.setPrefix = __C2GSMALLOC(argv[2]);
if (prefixrec.buffer.setPrefix == NULL) {
bb_error_msg("%s: memory allocation failure", argv[0]);
return EXIT_FAILURE;
}
SetPrefix(&prefixrec);
GIfree(prefixrec.buffer.setPrefix);
return EXIT_SUCCESS;
}
prefixrec.pCount = 2;
prefixrec.prefixNum = prefix;
prefixrec.buffer.setPrefix = __C2GSMALLOC(argv[2]);
if (prefixrec.buffer.setPrefix == NULL) {
/* get one or more prefixes */
prefixrec.buffer.getPrefix = GOinit(8192, NULL);
if (prefixrec.buffer.getPrefix == NULL) {
bb_error_msg("%s: memory allocation failure", argv[0]);
return EXIT_FAILURE;
}
SetPrefix(&prefixrec);
GIfree(prefixrec.buffer.setPrefix);
for (; prefix <= maxprefix; prefix++) {
if (prefix != -2) {
prefixrec.prefixNum = prefix;
GetPrefix(&prefixrec);
} else {
/* Abuse prefixrec as a parameter rec for GetBootVol */
prefixrec.prefixNum = 1; /* pCount */
GetBootVol(&prefixrec.prefixNum);
}
if (toolerror()) continue;
prefixrec.buffer.getPrefix->
bufString.text[prefixrec.buffer.getPrefix->bufString.length] = 0;
if (prefixrec.buffer.getPrefix->bufString.length > 0 || argc == 2) {
if (argc == 1) {
switch(prefix) {
case -2:
printf(" *: ");
break;
case -1:
printf(" @: ");
break;
default:
printf("%2i: ", prefix);
}
}
puts(prefixrec.buffer.getPrefix->bufString.text);
}
}
GOfree(prefixrec.buffer.getPrefix);
return EXIT_SUCCESS;
}
#endif