68404f13d4
function old new delta procps_scan 1265 1298 +33 aliascmd 278 283 +5 parse_file_cmd 116 120 +4 dname_enc 373 377 +4 setcmd 90 93 +3 execcmd 57 60 +3 count_lines 72 74 +2 process_command_subs 340 339 -1 test_main 409 407 -2 mknod_main 179 177 -2 handle_incoming_and_exit 2653 2651 -2 argstr 1312 1310 -2 shiftcmd 131 128 -3 exitcmd 46 43 -3 dotcmd 297 294 -3 breakcmd 86 83 -3 evalpipe 353 349 -4 evalcommand 1180 1176 -4 evalcmd 109 105 -4 send_tree 374 369 -5 mkfifo_main 82 77 -5 evalsubshell 152 147 -5 typecmd 75 69 -6 letcmd 61 55 -6 add_cmd 1190 1183 -7 main 891 883 -8 ash_main 1415 1407 -8 parse_stream 1377 1367 -10 alloc_procps_scan 55 - -55 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 7/21 up/down: 54/-148) Total: -94 bytes text data bss dec hex filename 797195 658 7428 805281 c49a1 busybox_old 797101 658 7428 805187 c4943 busybox_unstripped
76 lines
2.1 KiB
C
76 lines
2.1 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini watch implementation for busybox
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*
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* Copyright (C) 2001 by Michael Habermann <mhabermann@gmx.de>
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* Copyrigjt (C) Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/* BB_AUDIT SUSv3 N/A */
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/* BB_AUDIT GNU defects -- only option -n is supported. */
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#include "libbb.h"
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// procps 2.0.18:
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// watch [-d] [-n seconds]
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// [--differences[=cumulative]] [--interval=seconds] command
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//
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// procps-3.2.3:
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// watch [-dt] [-n seconds]
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// [--differences[=cumulative]] [--interval=seconds] [--no-title] command
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//
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// (procps 3.x and procps 2.x are forks, not newer/older versions of the same)
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int watch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int watch_main(int argc ATTRIBUTE_UNUSED, char **argv)
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{
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unsigned opt;
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unsigned period = 2;
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int width, new_width;
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char *header;
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char *cmd;
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opt_complementary = "-1:n+"; // at least one param; -n NUM
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// "+": stop at first non-option (procps 3.x only)
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opt = getopt32(argv, "+dtn:", &period);
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argv += optind;
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// watch from both procps 2.x and 3.x does concatenation. Example:
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// watch ls -l "a /tmp" "2>&1" -- ls won't see "a /tmp" as one param
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cmd = *argv;
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while (*++argv)
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cmd = xasprintf("%s %s", cmd, *argv); // leaks cmd
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width = -1; // make sure first time new_width != width
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header = NULL;
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while (1) {
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printf("\033[H\033[J");
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if (!(opt & 0x2)) { // no -t
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const int time_len = sizeof("1234-67-90 23:56:89");
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time_t t;
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get_terminal_width_height(STDIN_FILENO, &new_width, NULL);
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if (new_width != width) {
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width = new_width;
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free(header);
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header = xasprintf("Every %us: %-*s", period, width, cmd);
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}
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time(&t);
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if (time_len < width)
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strftime(header + width - time_len, time_len,
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"%Y-%m-%d %H:%M:%S", localtime(&t));
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puts(header);
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}
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fflush(stdout);
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// TODO: 'real' watch pipes cmd's output to itself
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// and does not allow it to overflow the screen
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// (taking into account linewrap!)
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system(cmd);
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sleep(period);
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}
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return 0; // gcc thinks we can reach this :)
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}
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