diff options
| -rw-r--r-- | shell/ash.c | 110 |
1 files changed, 75 insertions, 35 deletions
diff --git a/shell/ash.c b/shell/ash.c index 58527bf..bb930f5 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -11575,26 +11575,31 @@ readcmd(int argc, char **argv) ifs = defifs; #if ENABLE_ASH_READ_NCHARS if (n_flag || silent) { - tcgetattr(0, &tty); - old_tty = tty; - if (n_flag) { - tty.c_lflag &= ~ICANON; - tty.c_cc[VMIN] = nchars; - } - if (silent) { - tty.c_lflag &= ~(ECHO|ECHOK|ECHONL); + if (tcgetattr(0, &tty) != 0) { + /* Not a tty */ + n_flag = 0; + silent = 0; + } else { + old_tty = tty; + if (n_flag) { + tty.c_lflag &= ~ICANON; + tty.c_cc[VMIN] = nchars < 256 ? nchars : 255; + } + if (silent) { + tty.c_lflag &= ~(ECHO | ECHOK | ECHONL); + } + tcsetattr(0, TCSANOW, &tty); } - tcsetattr(0, TCSANOW, &tty); } #endif #if ENABLE_ASH_READ_TIMEOUT if (ts.tv_sec || ts.tv_usec) { -// TODO: replace with poll, it is smaller FD_ZERO(&set); FD_SET(0, &set); - i = select(FD_SETSIZE, &set, NULL, NULL, &ts); - if (!i) { + /* poll-based wait produces bigger code, using select */ + i = select(1, &set, NULL, NULL, &ts); + if (!i) { /* timed out! */ #if ENABLE_ASH_READ_NCHARS if (n_flag) tcsetattr(0, TCSANOW, &old_tty); @@ -11742,48 +11747,81 @@ umaskcmd(int argc, char **argv) */ struct limits { - const char *name; - int cmd; - int factor; /* multiply by to get rlim_{cur,max} values */ + uint8_t cmd; /* RLIMIT_xxx fit into it */ + uint8_t factor_shift; /* shift by to get rlim_{cur,max} values */ char option; }; -static const struct limits limits[] = { +static const struct limits limits_tbl[] = { #ifdef RLIMIT_CPU - { "time(seconds)", RLIMIT_CPU, 1, 't' }, + { RLIMIT_CPU, 0, 't' }, #endif #ifdef RLIMIT_FSIZE - { "file(blocks)", RLIMIT_FSIZE, 512, 'f' }, + { RLIMIT_FSIZE, 9, 'f' }, #endif #ifdef RLIMIT_DATA - { "data(kbytes)", RLIMIT_DATA, 1024, 'd' }, + { RLIMIT_DATA, 10, 'd' }, #endif #ifdef RLIMIT_STACK - { "stack(kbytes)", RLIMIT_STACK, 1024, 's' }, + { RLIMIT_STACK, 10, 's' }, #endif -#ifdef RLIMIT_CORE - { "coredump(blocks)", RLIMIT_CORE, 512, 'c' }, +#ifdef RLIMIT_CORE + { RLIMIT_CORE, 9, 'c' }, #endif #ifdef RLIMIT_RSS - { "memory(kbytes)", RLIMIT_RSS, 1024, 'm' }, + { RLIMIT_RSS, 10, 'm' }, #endif #ifdef RLIMIT_MEMLOCK - { "locked memory(kbytes)", RLIMIT_MEMLOCK, 1024, 'l' }, + { RLIMIT_MEMLOCK, 10, 'l' }, #endif #ifdef RLIMIT_NPROC - { "process", RLIMIT_NPROC, 1, 'p' }, + { RLIMIT_NPROC, 0, 'p' }, #endif #ifdef RLIMIT_NOFILE - { "nofiles", RLIMIT_NOFILE, 1, 'n' }, + { RLIMIT_NOFILE, 0, 'n' }, #endif #ifdef RLIMIT_AS - { "vmemory(kbytes)", RLIMIT_AS, 1024, 'v' }, + { RLIMIT_AS, 10, 'v' }, #endif #ifdef RLIMIT_LOCKS - { "locks", RLIMIT_LOCKS, 1, 'w' }, + { RLIMIT_LOCKS, 0, 'w' }, #endif - { NULL, 0, 0, '\0' } }; +static const char limits_name[] = +#ifdef RLIMIT_CPU + "time(seconds)" "\0" +#endif +#ifdef RLIMIT_FSIZE + "file(blocks)" "\0" +#endif +#ifdef RLIMIT_DATA + "data(kb)" "\0" +#endif +#ifdef RLIMIT_STACK + "stack(kb)" "\0" +#endif +#ifdef RLIMIT_CORE + "coredump(blocks)" "\0" +#endif +#ifdef RLIMIT_RSS + "memory(kb)" "\0" +#endif +#ifdef RLIMIT_MEMLOCK + "locked memory(kb)" "\0" +#endif +#ifdef RLIMIT_NPROC + "process" "\0" +#endif +#ifdef RLIMIT_NOFILE + "nofiles" "\0" +#endif +#ifdef RLIMIT_AS + "vmemory(kb)" "\0" +#endif +#ifdef RLIMIT_LOCKS + "locks" "\0" +#endif +; enum limtype { SOFT = 0x1, HARD = 0x2 }; @@ -11800,7 +11838,7 @@ printlim(enum limtype how, const struct rlimit *limit, if (val == RLIM_INFINITY) out1fmt("unlimited\n"); else { - val /= l->factor; + val >>= l->factor_shift; out1fmt("%lld\n", (long long) val); } } @@ -11866,8 +11904,8 @@ ulimitcmd(int argc, char **argv) what = optc; } - for (l = limits; l->option != what; l++) - ; + for (l = limits_tbl; l->option != what; l++) + continue; set = *argptr ? 1 : 0; if (set) { @@ -11887,13 +11925,15 @@ ulimitcmd(int argc, char **argv) } if (c) ash_msg_and_raise_error("bad number"); - val *= l->factor; + val <<= l->factor_shift; } } if (all) { - for (l = limits; l->name; l++) { + const char *lname = limits_name; + for (l = limits_tbl; l != &limits_tbl[ARRAY_SIZE(limits_tbl)]; l++) { getrlimit(l->cmd, &limit); - out1fmt("%-20s ", l->name); + out1fmt("%-20s ", lname); + lname += strlen(lname) + 1; printlim(how, &limit, l); } return 0; |