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setserial: code shrink, better --help text

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function                                             old     new   delta
packed_usage                                       31747   31749      +2
setserial_main                                      1152    1132     -20

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2017-08-06 17:59:37 +02:00
parent 2262746e2b
commit 08e66a8149
1 changed files with 45 additions and 44 deletions
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83
miscutils/setserial.c
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@ -210,35 +210,35 @@ struct serial_struct {
#endif
//usage:#define setserial_trivial_usage
//usage: "[-gabGvzV] DEVICE [PARAMETER [ARG]]..."
//usage: "[-abGvz] { DEVICE [PARAMETER [ARG]]... | -g DEVICE... }"
//usage:#define setserial_full_usage "\n\n"
//usage: "Request or set Linux serial port information\n"
//usage: "Print or set serial port parameters"
//usage: "\n"
//usage: " -g Interpret parameters as list of devices for reporting\n"
//usage: " -a Print all available information\n"
//usage: " -b Print summary information\n"
//usage: " -G Print in form which can be fed back\n"
//usage: " to setserial as command line parameters\n"
//usage: " -z Zero out serial flags before setting\n"
//usage: " -v Verbose\n"
//usage: "\n"" -a Print all"
//usage: "\n"" -b Print summary"
//usage: "\n"" -G Print as setserial PARAMETERs"
//usage: "\n"" -v Verbose"
//usage: "\n"" -z Zero out serial flags before setting"
//usage: "\n"" -g All args are device names"
//usage: "\n"
//usage: "Parameters: (* = takes an argument, ^ = can be turned off by preceding ^)\n"
//usage: " *port, *irq, *divisor, *uart, *baud_base, *close_delay, *closing_wait,\n"
//usage: " ^fourport, ^auto_irq, ^skip_test, ^sak, ^session_lockout, ^pgrp_lockout,\n"
//usage: " ^callout_nohup, ^split_termios, ^hup_notify, ^low_latency, autoconfig,\n"
//usage: " spd_normal, spd_hi, spd_vhi, spd_shi, spd_warp, spd_cust\n"
//usage: "\n"
//usage: "UART types:\n"
//usage: " unknown, 8250, 16450, 16550, 16550A, Cirrus, 16650, 16650V2, 16750,\n"
//usage: " 16950, 16954, 16654, 16850, RSA, NS16550A, XSCALE, RM9000, OCTEON, AR7,\n"
//usage: " U6_16550A"
//usage: "\n""PARAMETERs: (* = takes ARG, ^ = can be turned off by preceding ^)"
//usage: "\n"" *port, *irq, *divisor, *uart, *baud_base, *close_delay, *closing_wait,"
//usage: "\n"" ^fourport, ^auto_irq, ^skip_test, ^sak, ^session_lockout, ^pgrp_lockout,"
//usage: "\n"" ^callout_nohup, ^split_termios, ^hup_notify, ^low_latency, autoconfig,"
//usage: "\n"" spd_normal, spd_hi, spd_vhi, spd_shi, spd_warp, spd_cust"
//usage: "\n""ARG for uart:"
//usage: "\n"" unknown, 8250, 16450, 16550, 16550A, Cirrus, 16650, 16650V2, 16750,"
//usage: "\n"" 16950, 16954, 16654, 16850, RSA, NS16550A, XSCALE, RM9000, OCTEON, AR7,"
//usage: "\n"" U6_16550A"
// option string is "bGavzgq". "q" is accepted but ignored.
#define OPT_PRINT_SUMMARY (1 << 0)
#define OPT_PRINT_FEDBACK (1 << 1)
#define OPT_PRINT_ALL (1 << 2)
#define OPT_VERBOSE (1 << 3)
#define OPT_ZERO (1 << 4)
#define OPT_GET (1 << 5)
#define OPT_LIST_OF_DEVS (1 << 5)
/*#define OPT_QUIET (1 << 6)*/
#define OPT_MODE_MASK \
(OPT_PRINT_ALL | OPT_PRINT_SUMMARY | OPT_PRINT_FEDBACK)
@ -362,7 +362,7 @@ static bool cmd_is_flag(int cmd)
return (cmd >= CMD_FLAG_FIRST && cmd <= CMD_FLAG_LAST);
}
static bool cmd_need_arg(int cmd)
static bool cmd_needs_arg(int cmd)
{
return (cmd >= CMD_PORT && cmd <= CMD_WAIT);
}
@ -652,11 +652,9 @@ static int find_cmd(const char *cmd)
static void serial_set(char **arg, int opts)
{
struct serial_struct serinfo;
int cmd;
const char *word;
int fd;
fd = serial_open(*arg++, /*quiet:*/ false);
fd = serial_open(*arg, /*quiet:*/ false);
if (fd < 0)
exit(201);
@ -665,16 +663,19 @@ static void serial_set(char **arg, int opts)
if (opts & OPT_ZERO)
serinfo.flags = 0;
while (*arg) {
while (*++arg) {
const char *word;
int invert;
int cmd;
word = *arg++;
invert = (*word == '^');
word = *arg;
invert = (word[0] == '^');
word += invert;
cmd = find_cmd(word);
if (*arg == NULL && cmd_need_arg(cmd))
if (cmd_needs_arg(cmd))
if (*++arg == NULL)
bb_error_msg_and_die(bb_msg_requires_arg, word);
if (invert && !cmd_is_flag(cmd))
@ -705,25 +706,25 @@ static void serial_set(char **arg, int opts)
serinfo.flags |= setbits[cmd];
break;
case CMD_PORT:
serinfo.port = get_numeric(*arg++);
serinfo.port = get_numeric(*arg);
break;
case CMD_IRQ:
serinfo.irq = get_numeric(*arg++);
serinfo.irq = get_numeric(*arg);
break;
case CMD_DIVISOR:
serinfo.custom_divisor = get_numeric(*arg++);
serinfo.custom_divisor = get_numeric(*arg);
break;
case CMD_UART:
serinfo.type = get_uart(*arg++);
serinfo.type = get_uart(*arg);
break;
case CMD_BASE:
serinfo.baud_base = get_numeric(*arg++);
serinfo.baud_base = get_numeric(*arg);
break;
case CMD_DELAY:
serinfo.close_delay = get_numeric(*arg++);
serinfo.close_delay = get_numeric(*arg);
break;
case CMD_WAIT:
serinfo.closing_wait = get_wait(*arg++);
serinfo.closing_wait = get_wait(*arg);
break;
case CMD_AUTOCONFIG:
serial_ctl(fd, CTL_SET | CTL_CONFIG | CTL_GET, &serinfo);
@ -742,21 +743,21 @@ int setserial_main(int argc UNUSED_PARAM, char **argv)
int opts;
opt_complementary = "-1:b-aG:G-ab:a-bG";
opts = getopt32(argv, "bGavzg");
opts = getopt32(argv, "bGavzgq");
argv += optind;
if (!argv[1]) /* one arg only? */
opts |= OPT_GET;
opts |= OPT_LIST_OF_DEVS;
if (!(opts & OPT_GET)) {
if (!(opts & OPT_LIST_OF_DEVS)) {
serial_set(argv, opts);
argv[1] = NULL;
}
if (opts & (OPT_VERBOSE | OPT_GET)) {
if (opts & (OPT_VERBOSE | OPT_LIST_OF_DEVS)) {
do {
serial_get(*argv++, opts & OPT_MODE_MASK);
} while (*argv);
serial_get(*argv, opts & OPT_MODE_MASK);
} while (*++argv);
}
return EXIT_SUCCESS;