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addattr: Fix some deficiencies.

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The addattr didn't quite match its help text, wrt the kinds of values one can
use for type codes. Aside from the list of named types (which isn't actually
quite complete compared to the choices in the source) the help said one can
enter "numeric values", and gives both hex and decimal examples.

However, trying a hex value didn't work -- only decimal numbers were accepted.
This turned out to be because the sscanf format option is "%u" (actually
B_SCNu32) which only handles decimal. It has to be B_SCNi32 (which means it
would be allowed to enter a negative value -- just not very sensible...) The
other example entry given is " 'ABCD' ", which apparently is meant to indicate
that one can enter 'FourCC' direct type-code representations, but of course
that wouldn't work as shown because the shell strips off the quotes. Escaping
the quotes -- \'ABCD\' -- or adding a second layer -- "'ABCD'" -- does work
but is not obvious. (I can't think of any other command line that requires
such a convention.)

I have added another option: "-c ABCD". The current way can
still work, but the new option should be fairly evident to anyone.

Signed-off-by: Augustin Cavalier <waddlesplash@gmail.com>
Fixes #12562.
This commit is contained in:
Pete Goodeve 2016-01-27 19:38:09 -05:00 committed by Augustin Cavalier
parent a83b9383fa
commit 7beac31fbc
1 changed files with 46 additions and 19 deletions
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57
src/bin/addattr/main.cpp
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@ -90,12 +90,14 @@ typeForString(const char* string, type_code* _result)
}
}
// type didn't show up - in this case, we parse the string
// as number and use it directly as type code
// type didn't show up - in this case, we try to parse
// the string as number and use it directly as type code
if (sscanf(string, "%" B_SCNu32, _result) == 1)
if (sscanf(string, "%" B_SCNi32, _result) == 1)
return B_OK;
// if that didn't work, try the string as a char-type-code
// enclosed in single quotes
uchar type[4];
if (sscanf(string, "'%c%c%c%c'", &type[0], &type[1], &type[2], &type[3]) == 4) {
*_result = (type[0] << 24) | (type[1] << 16) | (type[2] << 8) | type[3];
@ -109,13 +111,17 @@ typeForString(const char* string, type_code* _result)
void
usage(int returnValue)
{
fprintf(stderr, "usage: %s [-t type] [ -P ] attr value file1 [file2...]\n"
" or: %s [-f value-from-file] [-t type] [ -P ] attr file1 [file2...]\n\n"
fprintf(stderr, "usage: %s [-t type|-c code] [ -P ] attr value file1 [file2...]\n"
" or: %s [-f value-from-file] [-t type|-c code] [ -P ] attr file1 [file2...]\n\n"
"\t-P : Don't resolve links\n"
"\tType is one of:\n"
"\t\tstring, mime, int, llong, float, double, bool, time, icon, raw\n"
"\t\tor a numeric value (ie. 0x1234, 42, 'ABCD', ...)\n"
"\tThe default is \"string\"\n", kProgramName, kProgramName);
"\tThe '-t' and '-c' options are alternatives; use one or the other.\n"
"\ttype is one of:\n"
"\t\tstring, mime, int, int32, uint32, llong, int64, uint64,\n"
"\t\tfloat, double, bool, icon, time, raw\n"
"\t\tor a numeric value (ie. 0x1234, 42, ...),\n"
"\t\tor an escape-quoted type code, eg. \\'MICN\\'\n"
"\tThe default is \"string\"\n"
"\tcode is a four-char type ID (eg. MICN)\n", kProgramName, kProgramName);
exit(returnValue);
}
@ -126,9 +132,21 @@ invalidAttrType(const char* attrTypeName)
{
fprintf(stderr, "%s: attribute type \"%s\" is not valid\n", kProgramName,
attrTypeName);
fprintf(stderr, "\tTry one of: string, mime, int, llong, float, double,\n");
fprintf(stderr, "\t\tbool, time, icon, raw, or a numeric value (ie. 0x1234, 42, 'ABCD'"
", ...)\n");
fprintf(stderr, "\tTry one of: string, mime, int, llong, float, double,\n"
"\t\tbool, icon, time, raw, or a numeric value (ie. 0x1234, 42, ...),\n"
"\t\tor a quoted type code, eg.: \\'MICN\\'\n"
"\t\tOr enter the actual type code with the '-c' option\n");
exit(1);
}
void
invalidTypeCode(const char* attrTypeName)
{
fprintf(stderr, "%s: attribute type code \"%s\" is not valid\n", kProgramName,
attrTypeName);
fprintf(stderr, "\tIt must be exactly four characters\n");
exit(1);
}
@ -139,8 +157,8 @@ invalidBoolValue(const char* value)
{
fprintf(stderr, "%s: attribute value \"%s\" is not valid\n", kProgramName,
value);
fprintf(stderr, "\tBool accepts: 0, f, false, disabled, off,\n");
fprintf(stderr, "\t\t1, t, true, enabled, on\n");
fprintf(stderr, "\tBool accepts: 0, f, false, disabled, off,\n"
"\t\t1, t, true, enabled, on\n");
exit(1);
}
@ -155,7 +173,7 @@ main(int argc, char* argv[])
bool resolveLinks = true;
int c;
while ((c = getopt_long(argc, argv, "hf:t:P", kLongOptions, NULL)) != -1) {
while ((c = getopt_long(argc, argv, "hf:t:c:P", kLongOptions, NULL)) != -1) {
switch (c) {
case 0:
break;
@ -202,6 +220,15 @@ main(int argc, char* argv[])
if (typeForString(optarg, &attrType) != B_OK)
invalidAttrType(optarg);
break;
case 'c':
if (strlen(optarg) == 4) {
// Get the type code directly
char code[] = "' '";
strncpy(code + 1, optarg, 4);
if (typeForString(code, &attrType) == B_OK)
break;
}
invalidTypeCode(optarg);
case 'P':
resolveLinks = false;
break;