chrt: add support for SCHED_BATCH

[oweals/busybox.git] / util-linux / fstrim.c

diff --git a/util-linux/fstrim.c b/util-linux/fstrim.c
index 00140b3404b57dfd8f85262816ad2b027688fe5f..205d1e42b8eaaa747fa8ad5479163c790d32a637 100644 (file)
--- a/util-linux/fstrim.c
+++ b/util-linux/fstrim.c
@@ -7,22 +7,31 @@
  *
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
+//config:config FSTRIM
+//config:      bool "fstrim (5.5 kb)"
+//config:      default y
+//config:      select PLATFORM_LINUX
+//config:      help
+//config:      Discard unused blocks on a mounted filesystem.
+
+//applet:IF_FSTRIM(APPLET_NOEXEC(fstrim, fstrim, BB_DIR_SBIN, BB_SUID_DROP, fstrim))
+
+//kbuild:lib-$(CONFIG_FSTRIM) += fstrim.o
 
 //usage:#define fstrim_trivial_usage
-//usage:       "[Options] <mountpoint>"
+//usage:       "[OPTIONS] MOUNTPOINT"
 //usage:#define fstrim_full_usage "\n\n"
-//usage:       "Options:"
 //usage:       IF_LONG_OPTS(
-//usage:     "\n       -o,--offset=offset      offset in bytes to discard from"
-//usage:     "\n       -l,--length=length      length of bytes to discard from the offset"
-//usage:     "\n       -m,--minimum=minimum    minimum extent length to discard"
-//usage:     "\n       -v,--verbose            print number of discarded bytes"
+//usage:       "       -o,--offset OFFSET      Offset in bytes to discard from"
+//usage:     "\n       -l,--length LEN         Bytes to discard"
+//usage:     "\n       -m,--minimum MIN        Minimum extent length"
+//usage:     "\n       -v,--verbose            Print number of discarded bytes"
 //usage:       )
 //usage:       IF_NOT_LONG_OPTS(
-//usage:     "\n       -o offset       offset in bytes to discard from"
-//usage:     "\n       -l length       length of bytes to discard from the offset"
-//usage:     "\n       -m minimum      minimum extent length to discard"
-//usage:     "\n       -v,             print number of discarded bytes"
+//usage:       "       -o OFFSET       Offset in bytes to discard from"
+//usage:     "\n       -l LEN          Bytes to discard"
+//usage:     "\n       -m MIN          Minimum extent length"
+//usage:     "\n       -v              Print number of discarded bytes"
 //usage:       )
 
 #include "libbb.h"
@@ -37,30 +46,11 @@ struct fstrim_range {
 #define FITRIM         _IOWR('X', 121, struct fstrim_range)
 #endif
 
-static const struct suffix_mult fstrim_sfx[] = {
-       { "KiB", 1024 },
-       { "kiB", 1024 },
-       { "K", 1024 },
-       { "k", 1024 },
-       { "MiB", 1048576 },
-       { "miB", 1048576 },
-       { "M", 1048576 },
-       { "m", 1048576 },
-       { "GiB", 1073741824 },
-       { "giB", 1073741824 },
-       { "G", 1073741824 },
-       { "g", 1073741824 },
-       { "KB", 1000 },
-       { "MB", 1000000 },
-       { "GB", 1000000000 },
-       { "", 0 }
-};
-
 int fstrim_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int fstrim_main(int argc UNUSED_PARAM, char **argv)
 {
        struct fstrim_range range;
-       char *arg_o, *arg_l, *arg_m, *bd;
+       char *arg_o, *arg_l, *arg_m, *mp;
        unsigned opts;
        int fd;
 
@@ -72,37 +62,38 @@ int fstrim_main(int argc UNUSED_PARAM, char **argv)
        };
 
 #if ENABLE_LONG_OPTS
-       static const char getopt_longopts[] ALIGN1 =
+       static const char fstrim_longopts[] ALIGN1 =
                "offset\0"    Required_argument    "o"
                "length\0"    Required_argument    "l"
                "minimum\0"   Required_argument    "m"
                "verbose\0"   No_argument          "v"
                ;
-       applet_long_options = getopt_longopts;
 #endif
 
-       opt_complementary = "=1"; /* exactly one non-option arg: the mountpoint */
-       opts = getopt32(argv, "o:l:m:v", &arg_o, &arg_l, &arg_m);
+       opts = getopt32long(argv, "^" "o:l:m:v" "\0" "=1", fstrim_longopts,
+                       &arg_o, &arg_l, &arg_m
+       );
 
        memset(&range, 0, sizeof(range));
        range.len = ULLONG_MAX;
 
        if (opts & OPT_o)
-               range.start = xatoull_sfx(arg_o, fstrim_sfx);
+               range.start = xatoull_sfx(arg_o, kmg_i_suffixes);
        if (opts & OPT_l)
-               range.len = xatoull_sfx(arg_l, fstrim_sfx);
+               range.len = xatoull_sfx(arg_l, kmg_i_suffixes);
        if (opts & OPT_m)
-               range.minlen = xatoull_sfx(arg_m, fstrim_sfx);
+               range.minlen = xatoull_sfx(arg_m, kmg_i_suffixes);
 
-       bd = find_block_device(*(argv += optind));
-       if (bd) {
-               fd = xopen_nonblocking(bd);
+       mp = argv[optind];
+       if (find_block_device(mp)) {
+               fd = xopen_nonblocking(mp);
                xioctl(fd, FITRIM, &range);
                if (ENABLE_FEATURE_CLEAN_UP)
                        close(fd);
 
                if (opts & OPT_v)
-                       printf("%s: %llu bytes were trimmed\n", bd, range.len);
+                       printf("%s: %llu bytes trimmed\n", mp, (unsigned long long)range.len);
+               return EXIT_SUCCESS;
        }
-       return EXIT_SUCCESS;
+       return EXIT_FAILURE;
 }