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shell/ulimit: code shrink

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2019-10-21 16:47:09 +02:00
parent fb1103595f
commit 3ef513e787
1 changed files with 59 additions and 18 deletions
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77
shell/shell_common.c
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@ -322,52 +322,91 @@ shell_builtin_read(struct builtin_read_params *params)
struct limits {
uint8_t cmd; /* RLIMIT_xxx fit into it */
uint8_t factor_shift; /* shift by to get rlim_{cur,max} values */
const char *name;
};
static const struct limits limits_tbl[] = {
{ RLIMIT_CORE, 9, "core file size (blocks)" }, // -c
{ RLIMIT_DATA, 10, "data seg size (kb)" }, // -d
{ RLIMIT_NICE, 0, "scheduling priority" }, // -e
{ RLIMIT_FSIZE, 9, "file size (blocks)" }, // -f
{ RLIMIT_CORE, 9, }, // -c
{ RLIMIT_DATA, 10, }, // -d
{ RLIMIT_NICE, 0, }, // -e
{ RLIMIT_FSIZE, 9, }, // -f
#define LIMIT_F_IDX 3
#ifdef RLIMIT_SIGPENDING
{ RLIMIT_SIGPENDING, 0, "pending signals" }, // -i
{ RLIMIT_SIGPENDING, 0, }, // -i
#endif
#ifdef RLIMIT_MEMLOCK
{ RLIMIT_MEMLOCK, 10, "max locked memory (kb)" }, // -l
{ RLIMIT_MEMLOCK, 10, }, // -l
#endif
#ifdef RLIMIT_RSS
{ RLIMIT_RSS, 10, "max memory size (kb)" }, // -m
{ RLIMIT_RSS, 10, }, // -m
#endif
#ifdef RLIMIT_NOFILE
{ RLIMIT_NOFILE, 0, "open files" }, // -n
{ RLIMIT_NOFILE, 0, }, // -n
#endif
#ifdef RLIMIT_MSGQUEUE
{ RLIMIT_MSGQUEUE, 0, "POSIX message queues (bytes)" }, // -q
{ RLIMIT_MSGQUEUE, 0, }, // -q
#endif
#ifdef RLIMIT_RTPRIO
{ RLIMIT_RTPRIO, 0, "real-time priority" }, // -r
{ RLIMIT_RTPRIO, 0, }, // -r
#endif
#ifdef RLIMIT_STACK
{ RLIMIT_STACK, 10, "stack size (kb)" }, // -s
{ RLIMIT_STACK, 10, }, // -s
#endif
#ifdef RLIMIT_CPU
{ RLIMIT_CPU, 0, "cpu time (seconds)" }, // -t
{ RLIMIT_CPU, 0, }, // -t
#endif
#ifdef RLIMIT_NPROC
{ RLIMIT_NPROC, 0, "max user processes" }, // -u
{ RLIMIT_NPROC, 0, }, // -u
#endif
#ifdef RLIMIT_AS
{ RLIMIT_AS, 10, "virtual memory (kb)" }, // -v
{ RLIMIT_AS, 10, }, // -v
#endif
#ifdef RLIMIT_LOCKS
{ RLIMIT_LOCKS, 0, "file locks" }, // -x
{ RLIMIT_LOCKS, 0, }, // -x
#endif
};
// bash also shows:
//pipe size (512 bytes, -p) 8
static const char limits_help[] ALIGN1 =
"core file size (blocks)" // -c
"\0""data seg size (kb)" // -d
"\0""scheduling priority" // -e
"\0""file size (blocks)" // -f
#ifdef RLIMIT_SIGPENDING
"\0""pending signals" // -i
#endif
#ifdef RLIMIT_MEMLOCK
"\0""max locked memory (kb)" // -l
#endif
#ifdef RLIMIT_RSS
"\0""max memory size (kb)" // -m
#endif
#ifdef RLIMIT_NOFILE
"\0""open files" // -n
#endif
#ifdef RLIMIT_MSGQUEUE
"\0""POSIX message queues (bytes)" // -q
#endif
#ifdef RLIMIT_RTPRIO
"\0""real-time priority" // -r
#endif
#ifdef RLIMIT_STACK
"\0""stack size (kb)" // -s
#endif
#ifdef RLIMIT_CPU
"\0""cpu time (seconds)" // -t
#endif
#ifdef RLIMIT_NPROC
"\0""max user processes" // -u
#endif
#ifdef RLIMIT_AS
"\0""virtual memory (kb)" // -v
#endif
#ifdef RLIMIT_LOCKS
"\0""file locks" // -x
#endif
;
static const char limit_chars[] ALIGN1 =
"c"
"d"
@ -558,10 +597,12 @@ shell_builtin_ulimit(char **argv)
if (!(opts & (OPT_hard | OPT_soft)))
opts |= (OPT_hard | OPT_soft);
if (opts & OPT_all) {
const char *help = limits_help;
for (i = 0; i < ARRAY_SIZE(limits_tbl); i++) {
getrlimit(limits_tbl[i].cmd, &limit);
printf("%-32s(-%c) ", limits_tbl[i].name, limit_chars[i]);
printf("%-32s(-%c) ", help, limit_chars[i]);
printlim(opts, &limit, &limits_tbl[i]);
help += strlen(help) + 1;
}
return EXIT_SUCCESS;
}
@ -592,7 +633,7 @@ shell_builtin_ulimit(char **argv)
getrlimit(limits_tbl[i].cmd, &limit);
if (!val_str) {
if (opt_cnt > 1)
printf("%-32s(-%c) ", limits_tbl[i].name, limit_chars[i]);
printf("%-32s(-%c) ", nth_string(limits_help, i), limit_chars[i]);
printlim(opts, &limit, &limits_tbl[i]);
} else {
rlim_t val = RLIM_INFINITY;