[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini ps implementation(s) for busybox
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| 4 | *
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| 5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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[1770] | 6 | * Fix for SELinux Support:(c)2007 Hiroshi Shinji <shiroshi@my.email.ne.jp>
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| 7 | (c)2007 Yuichi Nakamura <ynakam@hitachisoft.jp>
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[821] | 8 | *
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[1770] | 9 | * Licensed under the GPL version 2, see the file LICENSE in this tarball.
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[821] | 10 | */
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| 11 |
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[1770] | 12 | #include "libbb.h"
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| 13 |
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| 14 | /* Absolute maximum on output line length */
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| 15 | enum { MAX_WIDTH = 2*1024 };
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| 16 |
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| 17 | #if ENABLE_DESKTOP
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| 18 |
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| 19 | /* Print value to buf, max size+1 chars (including trailing '\0') */
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| 20 |
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| 21 | static void func_user(char *buf, int size, const procps_status_t *ps)
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| 22 | {
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| 23 | safe_strncpy(buf, get_cached_username(ps->uid), size+1);
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| 24 | }
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| 25 |
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| 26 | static void func_comm(char *buf, int size, const procps_status_t *ps)
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| 27 | {
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| 28 | safe_strncpy(buf, ps->comm, size+1);
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| 29 | }
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| 30 |
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| 31 | static void func_args(char *buf, int size, const procps_status_t *ps)
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| 32 | {
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| 33 | read_cmdline(buf, size, ps->pid, ps->comm);
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| 34 | }
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| 35 |
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| 36 | static void func_pid(char *buf, int size, const procps_status_t *ps)
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| 37 | {
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| 38 | sprintf(buf, "%*u", size, ps->pid);
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| 39 | }
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| 40 |
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| 41 | static void func_ppid(char *buf, int size, const procps_status_t *ps)
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| 42 | {
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| 43 | sprintf(buf, "%*u", size, ps->ppid);
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| 44 | }
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| 45 |
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| 46 | static void func_pgid(char *buf, int size, const procps_status_t *ps)
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| 47 | {
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| 48 | sprintf(buf, "%*u", size, ps->pgid);
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| 49 | }
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| 50 |
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| 51 | static void put_u(char *buf, int size, unsigned u)
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| 52 | {
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| 53 | char buf5[5];
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| 54 | smart_ulltoa5( ((unsigned long long)u) << 10, buf5);
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| 55 | sprintf(buf, "%.*s", size, buf5);
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| 56 | }
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| 57 |
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| 58 | static void func_vsz(char *buf, int size, const procps_status_t *ps)
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| 59 | {
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| 60 | put_u(buf, size, ps->vsz);
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| 61 | }
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| 62 |
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| 63 | static void func_rss(char *buf, int size, const procps_status_t *ps)
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| 64 | {
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| 65 | put_u(buf, size, ps->rss);
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| 66 | }
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| 67 |
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| 68 | static void func_tty(char *buf, int size, const procps_status_t *ps)
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| 69 | {
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| 70 | buf[0] = '?';
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| 71 | buf[1] = '\0';
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| 72 | if (ps->tty_major) /* tty field of "0" means "no tty" */
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| 73 | snprintf(buf, size+1, "%u,%u", ps->tty_major, ps->tty_minor);
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| 74 | }
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| 75 |
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[821] | 76 | #if ENABLE_SELINUX
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[1770] | 77 | static void func_label(char *buf, int size, const procps_status_t *ps)
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| 78 | {
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| 79 | safe_strncpy(buf, ps->context ? ps->context : "unknown", size+1);
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| 80 | }
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[821] | 81 | #endif
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| 82 |
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[1770] | 83 | /*
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| 84 | static void func_nice(char *buf, int size, const procps_status_t *ps)
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[821] | 85 | {
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[1770] | 86 | ps->???
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| 87 | }
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| 88 |
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| 89 | static void func_etime(char *buf, int size, const procps_status_t *ps)
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| 90 | {
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| 91 | elapled time [[dd-]hh:]mm:ss
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| 92 | }
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| 93 |
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| 94 | static void func_time(char *buf, int size, const procps_status_t *ps)
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| 95 | {
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| 96 | cumulative time [[dd-]hh:]mm:ss
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| 97 | }
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| 98 |
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| 99 | static void func_pcpu(char *buf, int size, const procps_status_t *ps)
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| 100 | {
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| 101 | }
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| 102 | */
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| 103 |
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| 104 | typedef struct {
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| 105 | uint16_t width;
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| 106 | char name[6];
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| 107 | const char *header;
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| 108 | void (*f)(char *buf, int size, const procps_status_t *ps);
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| 109 | int ps_flags;
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| 110 | } ps_out_t;
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| 111 |
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| 112 | static const ps_out_t out_spec[] = {
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| 113 | // Mandated by POSIX:
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| 114 | { 8 , "user" ,"USER" ,func_user ,PSSCAN_UIDGID },
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| 115 | { 16 , "comm" ,"COMMAND",func_comm ,PSSCAN_COMM },
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| 116 | { 256 , "args" ,"COMMAND",func_args ,PSSCAN_COMM },
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| 117 | { 5 , "pid" ,"PID" ,func_pid ,PSSCAN_PID },
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| 118 | { 5 , "ppid" ,"PPID" ,func_ppid ,PSSCAN_PPID },
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| 119 | { 5 , "pgid" ,"PGID" ,func_pgid ,PSSCAN_PGID },
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| 120 | // { sizeof("ELAPSED")-1, "etime" ,"ELAPSED",func_etime ,PSSCAN_ },
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| 121 | // { sizeof("GROUP" )-1, "group" ,"GROUP" ,func_group ,PSSCAN_UIDGID },
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| 122 | // { sizeof("NI" )-1, "nice" ,"NI" ,func_nice ,PSSCAN_ },
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| 123 | // { sizeof("%CPU" )-1, "pcpu" ,"%CPU" ,func_pcpu ,PSSCAN_ },
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| 124 | // { sizeof("RGROUP" )-1, "rgroup","RGROUP" ,func_rgroup,PSSCAN_UIDGID },
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| 125 | // { sizeof("RUSER" )-1, "ruser" ,"RUSER" ,func_ruser ,PSSCAN_UIDGID },
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| 126 | // { sizeof("TIME" )-1, "time" ,"TIME" ,func_time ,PSSCAN_ },
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| 127 | { 6 , "tty" ,"TT" ,func_tty ,PSSCAN_TTY },
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| 128 | { 4 , "vsz" ,"VSZ" ,func_vsz ,PSSCAN_VSZ },
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| 129 | // Not mandated by POSIX, but useful:
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| 130 | { 4 , "rss" ,"RSS" ,func_rss ,PSSCAN_RSS },
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| 131 | #if ENABLE_SELINUX
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| 132 | { 35 , "label" ,"LABEL" ,func_label ,PSSCAN_CONTEXT },
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| 133 | #endif
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| 134 | };
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| 135 |
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| 136 | #if ENABLE_SELINUX
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| 137 | #define SELINIX_O_PREFIX "label,"
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| 138 | #define DEFAULT_O_STR SELINIX_O_PREFIX "pid,user" /* TODO: ,vsz,stat */ ",args"
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| 139 | #else
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| 140 | #define DEFAULT_O_STR "pid,user" /* TODO: ,vsz,stat */ ",args"
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| 141 | #endif
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| 142 |
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| 143 | struct globals {
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| 144 | ps_out_t* out;
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| 145 | int out_cnt;
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| 146 | int print_header;
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| 147 | int need_flags;
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| 148 | char *buffer;
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| 149 | unsigned terminal_width;
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| 150 | char default_o[sizeof(DEFAULT_O_STR)];
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| 151 | };
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| 152 | #define G (*(struct globals*)&bb_common_bufsiz1)
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| 153 | #define out (G.out )
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| 154 | #define out_cnt (G.out_cnt )
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| 155 | #define print_header (G.print_header )
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| 156 | #define need_flags (G.need_flags )
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| 157 | #define buffer (G.buffer )
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| 158 | #define terminal_width (G.terminal_width)
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| 159 | #define default_o (G.default_o )
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| 160 |
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| 161 | static ps_out_t* new_out_t(void)
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| 162 | {
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| 163 | int i = out_cnt++;
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| 164 | out = xrealloc(out, out_cnt * sizeof(*out));
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| 165 | return &out[i];
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| 166 | }
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| 167 |
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| 168 | static const ps_out_t* find_out_spec(const char *name)
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| 169 | {
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| 170 | int i;
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| 171 | for (i = 0; i < ARRAY_SIZE(out_spec); i++) {
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| 172 | if (!strcmp(name, out_spec[i].name))
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| 173 | return &out_spec[i];
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| 174 | }
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| 175 | bb_error_msg_and_die("bad -o argument '%s'", name);
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| 176 | }
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| 177 |
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| 178 | static void parse_o(char* opt)
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| 179 | {
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| 180 | ps_out_t* new;
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| 181 | // POSIX: "-o is blank- or comma-separated list" (FIXME)
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| 182 | char *comma, *equal;
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| 183 | while (1) {
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| 184 | comma = strchr(opt, ',');
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| 185 | equal = strchr(opt, '=');
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| 186 | if (comma && (!equal || equal > comma)) {
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| 187 | *comma = '\0';
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| 188 | *new_out_t() = *find_out_spec(opt);
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| 189 | *comma = ',';
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| 190 | opt = comma + 1;
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| 191 | continue;
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| 192 | }
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| 193 | break;
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| 194 | }
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| 195 | // opt points to last spec in comma separated list.
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| 196 | // This one can have =HEADER part.
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| 197 | new = new_out_t();
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| 198 | if (equal)
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| 199 | *equal = '\0';
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| 200 | *new = *find_out_spec(opt);
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| 201 | if (equal) {
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| 202 | *equal = '=';
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| 203 | new->header = equal + 1;
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| 204 | // POSIX: the field widths shall be ... at least as wide as
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| 205 | // the header text (default or overridden value).
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| 206 | // If the header text is null, such as -o user=,
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| 207 | // the field width shall be at least as wide as the
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| 208 | // default header text
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| 209 | if (new->header[0]) {
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| 210 | new->width = strlen(new->header);
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| 211 | print_header = 1;
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| 212 | }
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| 213 | } else
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| 214 | print_header = 1;
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| 215 | }
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| 216 |
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| 217 | static void post_process(void)
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| 218 | {
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| 219 | int i;
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| 220 | int width = 0;
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| 221 | for (i = 0; i < out_cnt; i++) {
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| 222 | need_flags |= out[i].ps_flags;
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| 223 | if (out[i].header[0]) {
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| 224 | print_header = 1;
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| 225 | }
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| 226 | width += out[i].width + 1; /* "FIELD " */
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| 227 | }
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| 228 | #if ENABLE_SELINUX
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| 229 | if (!is_selinux_enabled())
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| 230 | need_flags &= ~PSSCAN_CONTEXT;
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| 231 | #endif
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| 232 | buffer = xmalloc(width + 1); /* for trailing \0 */
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| 233 | }
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| 234 |
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| 235 | static void format_header(void)
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| 236 | {
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| 237 | int i;
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| 238 | ps_out_t* op;
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| 239 | char *p;
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| 240 |
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| 241 | if (!print_header)
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| 242 | return;
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| 243 | p = buffer;
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| 244 | i = 0;
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| 245 | if (out_cnt) {
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| 246 | while (1) {
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| 247 | op = &out[i];
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| 248 | if (++i == out_cnt) /* do not pad last field */
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| 249 | break;
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| 250 | p += sprintf(p, "%-*s ", op->width, op->header);
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| 251 | }
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| 252 | strcpy(p, op->header);
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| 253 | }
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| 254 | printf("%.*s\n", terminal_width, buffer);
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| 255 | }
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| 256 |
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| 257 | static void format_process(const procps_status_t *ps)
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| 258 | {
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[821] | 259 | int i, len;
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[1770] | 260 | char *p = buffer;
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| 261 | i = 0;
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| 262 | if (out_cnt) while (1) {
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| 263 | out[i].f(p, out[i].width, ps);
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| 264 | // POSIX: Any field need not be meaningful in all
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| 265 | // implementations. In such a case a hyphen ( '-' )
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| 266 | // should be output in place of the field value.
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| 267 | if (!p[0]) {
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| 268 | p[0] = '-';
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| 269 | p[1] = '\0';
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| 270 | }
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| 271 | len = strlen(p);
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| 272 | p += len;
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| 273 | len = out[i].width - len + 1;
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| 274 | if (++i == out_cnt) /* do not pad last field */
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| 275 | break;
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| 276 | p += sprintf(p, "%*s", len, "");
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| 277 | }
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| 278 | printf("%.*s\n", terminal_width, buffer);
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| 279 | }
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[821] | 280 |
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[1770] | 281 | int ps_main(int argc, char **argv);
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| 282 | int ps_main(int argc, char **argv)
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| 283 | {
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| 284 | procps_status_t *p;
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| 285 | llist_t* opt_o = NULL;
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| 286 | USE_SELINUX(int opt;)
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| 287 |
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| 288 | // POSIX:
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| 289 | // -a Write information for all processes associated with terminals
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| 290 | // Implementations may omit session leaders from this list
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| 291 | // -A Write information for all processes
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| 292 | // -d Write information for all processes, except session leaders
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| 293 | // -e Write information for all processes (equivalent to -A.)
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| 294 | // -f Generate a full listing
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| 295 | // -l Generate a long listing
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| 296 | // -o col1,col2,col3=header
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| 297 | // Select which columns to display
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| 298 | /* We allow (and ignore) most of the above. FIXME */
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| 299 | opt_complementary = "o::";
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| 300 | USE_SELINUX(opt =) getopt32(argv, "Zo:aAdefl", &opt_o);
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| 301 | if (opt_o) {
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| 302 | do {
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| 303 | parse_o(opt_o->data);
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| 304 | opt_o = opt_o->link;
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| 305 | } while (opt_o);
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| 306 | } else {
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| 307 | /* Below: parse_o() needs char*, NOT const char*... */
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[821] | 308 | #if ENABLE_SELINUX
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[1770] | 309 | if (!(opt & 1) || !is_selinux_enabled()) {
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| 310 | /* no -Z or no SELinux: do not show LABEL */
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| 311 | strcpy(default_o, DEFAULT_O_STR + sizeof(SELINIX_O_PREFIX)-1);
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| 312 | } else
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[821] | 313 | #endif
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[1770] | 314 | {
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| 315 | strcpy(default_o, DEFAULT_O_STR);
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| 316 | }
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| 317 | parse_o(default_o);
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| 318 | }
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| 319 | post_process();
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[821] | 320 |
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[1770] | 321 | /* Was INT_MAX, but some libc's go belly up with printf("%.*s")
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| 322 | * and such large widths */
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| 323 | terminal_width = MAX_WIDTH;
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| 324 | if (isatty(1)) {
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| 325 | get_terminal_width_height(0, &terminal_width, NULL);
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| 326 | if (--terminal_width > MAX_WIDTH)
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| 327 | terminal_width = MAX_WIDTH;
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| 328 | }
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| 329 | format_header();
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| 330 |
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| 331 | p = NULL;
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| 332 | while ((p = procps_scan(p, need_flags))) {
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| 333 | format_process(p);
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| 334 | }
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| 335 |
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| 336 | return EXIT_SUCCESS;
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| 337 | }
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| 338 |
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| 339 |
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| 340 | #else /* !ENABLE_DESKTOP */
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| 341 |
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| 342 |
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| 343 | int ps_main(int argc, char **argv);
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| 344 | int ps_main(int argc, char **argv)
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| 345 | {
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| 346 | procps_status_t *p = NULL;
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| 347 | int len;
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| 348 | SKIP_SELINUX(const) int use_selinux = 0;
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| 349 | USE_SELINUX(int i;)
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| 350 | #if !ENABLE_FEATURE_PS_WIDE
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| 351 | enum { terminal_width = 79 };
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| 352 | #else
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[821] | 353 | int terminal_width;
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| 354 | int w_count = 0;
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| 355 | #endif
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| 356 |
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| 357 | #if ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX
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| 358 | #if ENABLE_FEATURE_PS_WIDE
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[1770] | 359 | opt_complementary = "-:ww";
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| 360 | USE_SELINUX(i =) getopt32(argv, USE_SELINUX("Z") "w", &w_count);
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[821] | 361 | /* if w is given once, GNU ps sets the width to 132,
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| 362 | * if w is given more than once, it is "unlimited"
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| 363 | */
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[1770] | 364 | if (w_count) {
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| 365 | terminal_width = (w_count==1) ? 132 : MAX_WIDTH;
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[821] | 366 | } else {
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[1770] | 367 | get_terminal_width_height(0, &terminal_width, NULL);
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[821] | 368 | /* Go one less... */
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[1770] | 369 | if (--terminal_width > MAX_WIDTH)
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| 370 | terminal_width = MAX_WIDTH;
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[821] | 371 | }
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[1770] | 372 | #else /* only ENABLE_SELINUX */
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| 373 | i = getopt32(argv, "Z");
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[821] | 374 | #endif
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| 375 | #if ENABLE_SELINUX
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[1770] | 376 | if ((i & 1) && is_selinux_enabled())
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| 377 | use_selinux = PSSCAN_CONTEXT;
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[821] | 378 | #endif
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[1770] | 379 | #endif /* ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX */
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[821] | 380 |
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| 381 | if (use_selinux)
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[1770] | 382 | puts(" PID Context Stat Command");
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[821] | 383 | else
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[1770] | 384 | puts(" PID Uid VSZ Stat Command");
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[821] | 385 |
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[1770] | 386 | while ((p = procps_scan(p, 0
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| 387 | | PSSCAN_PID
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| 388 | | PSSCAN_UIDGID
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| 389 | | PSSCAN_STATE
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| 390 | | PSSCAN_VSZ
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| 391 | | PSSCAN_COMM
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| 392 | | use_selinux
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| 393 | ))) {
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[821] | 394 | #if ENABLE_SELINUX
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[1770] | 395 | if (use_selinux) {
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| 396 | len = printf("%5u %-32s %s ",
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| 397 | p->pid,
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| 398 | p->context ? p->context : "unknown",
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| 399 | p->state);
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| 400 | } else
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| 401 | #endif
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| 402 | {
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| 403 | const char *user = get_cached_username(p->uid);
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| 404 | if (p->vsz == 0)
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| 405 | len = printf("%5u %-8s %s ",
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| 406 | p->pid, user, p->state);
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| 407 | else
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| 408 | len = printf("%5u %-8s %6u %s ",
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| 409 | p->pid, user, p->vsz, p->state);
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[821] | 410 | }
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| 411 |
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[1770] | 412 | {
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| 413 | int sz = terminal_width - len;
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| 414 | char buf[sz + 1];
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| 415 | read_cmdline(buf, sz, p->pid, p->comm);
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| 416 | puts(buf);
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[821] | 417 | }
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| 418 | }
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[1770] | 419 | if (ENABLE_FEATURE_CLEAN_UP)
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| 420 | clear_username_cache();
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[821] | 421 | return EXIT_SUCCESS;
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| 422 | }
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[1770] | 423 |
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| 424 | #endif /* ENABLE_DESKTOP */
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