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setarch: list available architectures

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Signed-off-by: Oliver Tappe <zooey@hirschkaefer.de>
This commit is contained in:
David Höppner 2014-03-06 09:27:43 +01:00 committed by Oliver Tappe
parent 0009559ca3
commit fe309ca2a3
1 changed files with 37 additions and 12 deletions
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49
src/bin/setarch.cpp
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@ -23,7 +23,8 @@ const char* kCommandName = __progname;
static const char* kUsage =
"Usage: %s [ <options> ] <architecture> [ <command> ... ]\n"
"Usage: %s [-hl]\n"
" %s [-p] <architecture> [ <command> ... ]\n"
"Executes the given command or, by default, a shell with a PATH\n"
"environment variable modified such that commands for the given\n"
"architecture will be preferred, respectively used exclusively in case of\n"
@ -32,6 +33,8 @@ static const char* kUsage =
"Options:\n"
" -h, --help\n"
" Print this usage info.\n"
" -l, --list-architectures\n"
" List all architectures.\n"
" -p, --print-path\n"
" Only print the modified PATH variable value; don't execute any\n"
" command.\n"
@ -41,8 +44,8 @@ static const char* kUsage =
static void
print_usage_and_exit(bool error)
{
fprintf(error ? stderr : stdout, kUsage, kCommandName);
exit(error ? 1 : 0);
fprintf(error ? stderr : stdout, kUsage, kCommandName, kCommandName);
exit(error ? 1 : 0);
}
@ -136,16 +139,18 @@ int
main(int argc, const char* const* argv)
{
bool printPath = false;
bool listArchitectures = false;
while (true) {
static struct option sLongOptions[] = {
{ "help", no_argument, 0, 'h' },
{ "list-architectures", no_argument, 0, 'l' },
{ "print-path", no_argument, 0, 'p' },
{ 0, 0, 0, 0 }
};
opterr = 0; // don't print errors
int c = getopt_long(argc, (char**)argv, "+hp",
int c = getopt_long(argc, (char**)argv, "+hlp",
sLongOptions, NULL);
if (c == -1)
break;
@ -155,6 +160,10 @@ main(int argc, const char* const* argv)
print_usage_and_exit(false);
break;
case 'l':
listArchitectures = true;
break;
case 'p':
printPath = true;
break;
@ -165,6 +174,30 @@ main(int argc, const char* const* argv)
}
}
// only one of listArchitectures, printPath may be specified
if (listArchitectures && printPath)
print_usage_and_exit(true);
// get architectures
BStringList architectures;
status_t error = get_architectures(architectures);
if (error != B_OK) {
fprintf(stderr, "Error: Failed to get architectures: %s\n",
strerror(error));
exit(1);
}
// list architectures
if (listArchitectures) {
if (optind != argc)
print_usage_and_exit(true);
int32 count = architectures.CountStrings();
for (int32 i = 0; i < count; i++)
printf("%s\n", architectures.StringAt(i).String());
return 0;
}
// The remaining arguments are the architecture and optionally the command
// to execute.
if (optind >= argc)
@ -178,14 +211,6 @@ main(int argc, const char* const* argv)
print_usage_and_exit(true);
// check the architecture
BStringList architectures;
status_t error = get_architectures(architectures);
if (error != B_OK) {
fprintf(stderr, "Error: Failed to get architectures: %s\n",
strerror(error));
exit(1);
}
if (!architectures.HasString(architecture)) {
fprintf(stderr, "Error: Unsupported architecture \"%s\"\n",
architecture);