[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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[1765] | 6 | * Fix for SELinux Support:(c)2007 Hiroshi Shinji <shiroshi@my.email.ne.jp>
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[2725] | 7 | * (c)2007 Yuichi Nakamura <ynakam@hitachisoft.jp>
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[821] | 8 | *
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[2725] | 9 | * Licensed under GPLv2, see file LICENSE in this source tree.
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[821] | 10 | */
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| 11 |
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[3232] | 12 | //usage:#if ENABLE_DESKTOP
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| 13 | //usage:
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| 14 | //usage:#define ps_trivial_usage
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| 15 | //usage: "[-o COL1,COL2=HEADER]" IF_FEATURE_SHOW_THREADS(" [-T]")
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| 16 | //usage:#define ps_full_usage "\n\n"
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| 17 | //usage: "Show list of processes\n"
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| 18 | //usage: "\n -o COL1,COL2=HEADER Select columns for display"
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| 19 | //usage: IF_FEATURE_SHOW_THREADS(
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| 20 | //usage: "\n -T Show threads"
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| 21 | //usage: )
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| 22 | //usage:
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| 23 | //usage:#else /* !ENABLE_DESKTOP */
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| 24 | //usage:
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| 25 | //usage:#if !ENABLE_SELINUX && !ENABLE_FEATURE_PS_WIDE
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| 26 | //usage:#define USAGE_PS "\nThis version of ps accepts no options"
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| 27 | //usage:#else
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| 28 | //usage:#define USAGE_PS ""
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| 29 | //usage:#endif
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| 30 | //usage:
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| 31 | //usage:#define ps_trivial_usage
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| 32 | //usage: ""
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| 33 | //usage:#define ps_full_usage "\n\n"
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| 34 | //usage: "Show list of processes\n"
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| 35 | //usage: USAGE_PS
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| 36 | //usage: IF_SELINUX(
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| 37 | //usage: "\n -Z Show selinux context"
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| 38 | //usage: )
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| 39 | //usage: IF_FEATURE_PS_WIDE(
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| 40 | //usage: "\n w Wide output"
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| 41 | //usage: )
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| 42 | //usage: IF_FEATURE_PS_LONG(
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| 43 | //usage: "\n l Long output"
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| 44 | //usage: )
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| 45 | //usage: IF_FEATURE_SHOW_THREADS(
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| 46 | //usage: "\n T Show threads"
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| 47 | //usage: )
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| 48 | //usage:
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| 49 | //usage:#endif /* ENABLE_DESKTOP */
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| 50 | //usage:
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| 51 | //usage:#define ps_example_usage
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| 52 | //usage: "$ ps\n"
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| 53 | //usage: " PID Uid Gid State Command\n"
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| 54 | //usage: " 1 root root S init\n"
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| 55 | //usage: " 2 root root S [kflushd]\n"
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| 56 | //usage: " 3 root root S [kupdate]\n"
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| 57 | //usage: " 4 root root S [kpiod]\n"
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| 58 | //usage: " 5 root root S [kswapd]\n"
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| 59 | //usage: " 742 andersen andersen S [bash]\n"
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| 60 | //usage: " 743 andersen andersen S -bash\n"
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| 61 | //usage: " 745 root root S [getty]\n"
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| 62 | //usage: " 2990 andersen andersen R ps\n"
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| 63 |
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[1765] | 64 | #include "libbb.h"
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[3232] | 65 | #ifdef __linux__
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| 66 | # include <sys/sysinfo.h>
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| 67 | #endif
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[1765] | 68 |
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| 69 | /* Absolute maximum on output line length */
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| 70 | enum { MAX_WIDTH = 2*1024 };
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| 71 |
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[3232] | 72 | #if ENABLE_FEATURE_PS_TIME || ENABLE_FEATURE_PS_LONG
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| 73 | static long get_uptime(void)
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| 74 | {
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| 75 | #ifdef __linux__
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| 76 | struct sysinfo info;
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| 77 | if (sysinfo(&info) < 0)
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| 78 | return 0;
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| 79 | return info.uptime;
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| 80 | #elif 1
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| 81 | char buf[64];
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| 82 | long uptime;
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| 83 | if (open_read_close("/proc/uptime", buf, sizeof(buf)) <= 0)
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| 84 | bb_perror_msg_and_die("can't read %s", "/proc/uptime");
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| 85 | buf[sizeof(buf)-1] = '\0';
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| 86 | sscanf(buf, "%l", &uptime);
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| 87 | return uptime;
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| 88 | #else
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| 89 | struct timespec ts;
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| 90 | if (clock_gettime(CLOCK_MONOTONIC, &ts) < 0)
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| 91 | return 0;
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| 92 | return ts.tv_sec;
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| 93 | #endif
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| 94 | }
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| 95 | #endif
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| 96 |
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[1765] | 97 | #if ENABLE_DESKTOP
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| 98 |
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[2725] | 99 | #include <sys/times.h> /* for times() */
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| 100 | #ifndef AT_CLKTCK
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[3232] | 101 | # define AT_CLKTCK 17
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[2725] | 102 | #endif
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| 103 |
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[3232] | 104 | /* TODO:
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| 105 | * http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ps.html
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| 106 | * specifies (for XSI-conformant systems) following default columns
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| 107 | * (l and f mark columns shown with -l and -f respectively):
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| 108 | * F l Flags (octal and additive) associated with the process (??)
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| 109 | * S l The state of the process
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| 110 | * UID f,l The user ID; the login name is printed with -f
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| 111 | * PID The process ID
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| 112 | * PPID f,l The parent process
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| 113 | * C f,l Processor utilization
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| 114 | * PRI l The priority of the process; higher numbers mean lower priority
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| 115 | * NI l Nice value
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| 116 | * ADDR l The address of the process
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| 117 | * SZ l The size in blocks of the core image of the process
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| 118 | * WCHAN l The event for which the process is waiting or sleeping
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| 119 | * STIME f Starting time of the process
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| 120 | * TTY The controlling terminal for the process
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| 121 | * TIME The cumulative execution time for the process
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| 122 | * CMD The command name; the full command line is shown with -f
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| 123 | */
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[2725] | 124 | typedef struct {
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| 125 | uint16_t width;
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| 126 | char name6[6];
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| 127 | const char *header;
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| 128 | void (*f)(char *buf, int size, const procps_status_t *ps);
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| 129 | int ps_flags;
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| 130 | } ps_out_t;
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| 131 |
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| 132 | struct globals {
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| 133 | ps_out_t* out;
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| 134 | int out_cnt;
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| 135 | int print_header;
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| 136 | int need_flags;
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| 137 | char *buffer;
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| 138 | unsigned terminal_width;
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| 139 | #if ENABLE_FEATURE_PS_TIME
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| 140 | unsigned kernel_HZ;
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| 141 | unsigned long long seconds_since_boot;
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| 142 | #endif
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| 143 | } FIX_ALIASING;
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| 144 | #define G (*(struct globals*)&bb_common_bufsiz1)
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| 145 | #define out (G.out )
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| 146 | #define out_cnt (G.out_cnt )
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| 147 | #define print_header (G.print_header )
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| 148 | #define need_flags (G.need_flags )
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| 149 | #define buffer (G.buffer )
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| 150 | #define terminal_width (G.terminal_width )
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| 151 | #define kernel_HZ (G.kernel_HZ )
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| 152 | #define seconds_since_boot (G.seconds_since_boot)
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| 153 | #define INIT_G() do { } while (0)
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| 154 |
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| 155 | #if ENABLE_FEATURE_PS_TIME
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| 156 | /* for ELF executables, notes are pushed before environment and args */
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| 157 | static ptrdiff_t find_elf_note(ptrdiff_t findme)
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| 158 | {
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| 159 | ptrdiff_t *ep = (ptrdiff_t *) environ;
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| 160 |
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[3232] | 161 | while (*ep++)
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| 162 | continue;
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[2725] | 163 | while (*ep) {
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| 164 | if (ep[0] == findme) {
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| 165 | return ep[1];
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| 166 | }
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| 167 | ep += 2;
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| 168 | }
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| 169 | return -1;
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| 170 | }
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| 171 |
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| 172 | #if ENABLE_FEATURE_PS_UNUSUAL_SYSTEMS
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| 173 | static unsigned get_HZ_by_waiting(void)
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| 174 | {
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| 175 | struct timeval tv1, tv2;
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| 176 | unsigned t1, t2, r, hz;
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| 177 | unsigned cnt = cnt; /* for compiler */
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| 178 | int diff;
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| 179 |
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| 180 | r = 0;
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| 181 |
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| 182 | /* Wait for times() to reach new tick */
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| 183 | t1 = times(NULL);
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| 184 | do {
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| 185 | t2 = times(NULL);
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| 186 | } while (t2 == t1);
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| 187 | gettimeofday(&tv2, NULL);
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| 188 |
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| 189 | do {
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| 190 | t1 = t2;
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| 191 | tv1.tv_usec = tv2.tv_usec;
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| 192 |
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| 193 | /* Wait exactly one times() tick */
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| 194 | do {
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| 195 | t2 = times(NULL);
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| 196 | } while (t2 == t1);
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| 197 | gettimeofday(&tv2, NULL);
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| 198 |
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| 199 | /* Calculate ticks per sec, rounding up to even */
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| 200 | diff = tv2.tv_usec - tv1.tv_usec;
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| 201 | if (diff <= 0) diff += 1000000;
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| 202 | hz = 1000000u / (unsigned)diff;
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| 203 | hz = (hz+1) & ~1;
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| 204 |
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| 205 | /* Count how many same hz values we saw */
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| 206 | if (r != hz) {
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| 207 | r = hz;
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| 208 | cnt = 0;
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| 209 | }
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| 210 | cnt++;
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| 211 | } while (cnt < 3); /* exit if saw 3 same values */
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| 212 |
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| 213 | return r;
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| 214 | }
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| 215 | #else
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| 216 | static inline unsigned get_HZ_by_waiting(void)
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| 217 | {
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| 218 | /* Better method? */
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| 219 | return 100;
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| 220 | }
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| 221 | #endif
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| 222 |
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| 223 | static unsigned get_kernel_HZ(void)
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| 224 | {
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| 225 |
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| 226 | if (kernel_HZ)
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| 227 | return kernel_HZ;
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| 228 |
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| 229 | /* Works for ELF only, Linux 2.4.0+ */
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| 230 | kernel_HZ = find_elf_note(AT_CLKTCK);
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| 231 | if (kernel_HZ == (unsigned)-1)
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| 232 | kernel_HZ = get_HZ_by_waiting();
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| 233 |
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[3232] | 234 | seconds_since_boot = get_uptime();
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[2725] | 235 |
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| 236 | return kernel_HZ;
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| 237 | }
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| 238 | #endif
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| 239 |
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[1765] | 240 | /* Print value to buf, max size+1 chars (including trailing '\0') */
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| 241 |
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| 242 | static void func_user(char *buf, int size, const procps_status_t *ps)
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| 243 | {
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[2725] | 244 | #if 1
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[1765] | 245 | safe_strncpy(buf, get_cached_username(ps->uid), size+1);
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[2725] | 246 | #else
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| 247 | /* "compatible" version, but it's larger */
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| 248 | /* procps 2.18 shows numeric UID if name overflows the field */
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| 249 | /* TODO: get_cached_username() returns numeric string if
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| 250 | * user has no passwd record, we will display it
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| 251 | * left-justified here; too long usernames are shown
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| 252 | * as _right-justified_ IDs. Is it worth fixing? */
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| 253 | const char *user = get_cached_username(ps->uid);
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| 254 | if (strlen(user) <= size)
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| 255 | safe_strncpy(buf, user, size+1);
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| 256 | else
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| 257 | sprintf(buf, "%*u", size, (unsigned)ps->uid);
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| 258 | #endif
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[1765] | 259 | }
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| 260 |
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[2725] | 261 | static void func_group(char *buf, int size, const procps_status_t *ps)
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| 262 | {
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| 263 | safe_strncpy(buf, get_cached_groupname(ps->gid), size+1);
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| 264 | }
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| 265 |
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[1765] | 266 | static void func_comm(char *buf, int size, const procps_status_t *ps)
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| 267 | {
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| 268 | safe_strncpy(buf, ps->comm, size+1);
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| 269 | }
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| 270 |
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[3232] | 271 | static void func_state(char *buf, int size, const procps_status_t *ps)
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| 272 | {
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| 273 | safe_strncpy(buf, ps->state, size+1);
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| 274 | }
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| 275 |
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[1765] | 276 | static void func_args(char *buf, int size, const procps_status_t *ps)
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| 277 | {
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[2725] | 278 | read_cmdline(buf, size+1, ps->pid, ps->comm);
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[1765] | 279 | }
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| 280 |
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| 281 | static void func_pid(char *buf, int size, const procps_status_t *ps)
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| 282 | {
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| 283 | sprintf(buf, "%*u", size, ps->pid);
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| 284 | }
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| 285 |
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| 286 | static void func_ppid(char *buf, int size, const procps_status_t *ps)
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| 287 | {
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| 288 | sprintf(buf, "%*u", size, ps->ppid);
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| 289 | }
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| 290 |
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| 291 | static void func_pgid(char *buf, int size, const procps_status_t *ps)
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| 292 | {
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| 293 | sprintf(buf, "%*u", size, ps->pgid);
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| 294 | }
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| 295 |
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[2725] | 296 | static void put_lu(char *buf, int size, unsigned long u)
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[1765] | 297 | {
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[2725] | 298 | char buf4[5];
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| 299 |
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| 300 | /* see http://en.wikipedia.org/wiki/Tera */
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| 301 | smart_ulltoa4(u, buf4, " mgtpezy");
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| 302 | buf4[4] = '\0';
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| 303 | sprintf(buf, "%.*s", size, buf4);
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[1765] | 304 | }
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| 305 |
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| 306 | static void func_vsz(char *buf, int size, const procps_status_t *ps)
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| 307 | {
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[2725] | 308 | put_lu(buf, size, ps->vsz);
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[1765] | 309 | }
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| 310 |
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| 311 | static void func_rss(char *buf, int size, const procps_status_t *ps)
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| 312 | {
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[2725] | 313 | put_lu(buf, size, ps->rss);
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[1765] | 314 | }
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| 315 |
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| 316 | static void func_tty(char *buf, int size, const procps_status_t *ps)
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| 317 | {
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| 318 | buf[0] = '?';
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| 319 | buf[1] = '\0';
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| 320 | if (ps->tty_major) /* tty field of "0" means "no tty" */
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| 321 | snprintf(buf, size+1, "%u,%u", ps->tty_major, ps->tty_minor);
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| 322 | }
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| 323 |
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[2725] | 324 | #if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
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| 325 |
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| 326 | static void func_rgroup(char *buf, int size, const procps_status_t *ps)
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[1765] | 327 | {
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[2725] | 328 | safe_strncpy(buf, get_cached_groupname(ps->rgid), size+1);
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[1765] | 329 | }
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[821] | 330 |
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[2725] | 331 | static void func_ruser(char *buf, int size, const procps_status_t *ps)
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| 332 | {
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| 333 | safe_strncpy(buf, get_cached_username(ps->ruid), size+1);
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| 334 | }
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| 335 |
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[1765] | 336 | static void func_nice(char *buf, int size, const procps_status_t *ps)
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[821] | 337 | {
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[2725] | 338 | sprintf(buf, "%*d", size, ps->niceness);
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[1765] | 339 | }
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| 340 |
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[2725] | 341 | #endif
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| 342 |
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| 343 | #if ENABLE_FEATURE_PS_TIME
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| 344 |
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[1765] | 345 | static void func_etime(char *buf, int size, const procps_status_t *ps)
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| 346 | {
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[2725] | 347 | /* elapsed time [[dd-]hh:]mm:ss; here only mm:ss */
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| 348 | unsigned long mm;
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| 349 | unsigned ss;
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| 350 |
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| 351 | mm = ps->start_time / get_kernel_HZ();
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| 352 | /* must be after get_kernel_HZ()! */
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| 353 | mm = seconds_since_boot - mm;
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| 354 | ss = mm % 60;
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| 355 | mm /= 60;
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| 356 | snprintf(buf, size+1, "%3lu:%02u", mm, ss);
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[1765] | 357 | }
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| 358 |
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| 359 | static void func_time(char *buf, int size, const procps_status_t *ps)
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| 360 | {
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[2725] | 361 | /* cumulative time [[dd-]hh:]mm:ss; here only mm:ss */
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| 362 | unsigned long mm;
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| 363 | unsigned ss;
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| 364 |
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| 365 | mm = (ps->utime + ps->stime) / get_kernel_HZ();
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| 366 | ss = mm % 60;
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| 367 | mm /= 60;
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| 368 | snprintf(buf, size+1, "%3lu:%02u", mm, ss);
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[1765] | 369 | }
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| 370 |
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[2725] | 371 | #endif
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| 372 |
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| 373 | #if ENABLE_SELINUX
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| 374 | static void func_label(char *buf, int size, const procps_status_t *ps)
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| 375 | {
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| 376 | safe_strncpy(buf, ps->context ? ps->context : "unknown", size+1);
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| 377 | }
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| 378 | #endif
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| 379 |
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| 380 | /*
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| 381 | static void func_nice(char *buf, int size, const procps_status_t *ps)
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| 382 | {
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| 383 | ps->???
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| 384 | }
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| 385 |
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[1765] | 386 | static void func_pcpu(char *buf, int size, const procps_status_t *ps)
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| 387 | {
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| 388 | }
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| 389 | */
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| 390 |
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| 391 | static const ps_out_t out_spec[] = {
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[3232] | 392 | /* Mandated by http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ps.html: */
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[1765] | 393 | { 8 , "user" ,"USER" ,func_user ,PSSCAN_UIDGID },
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[2725] | 394 | { 8 , "group" ,"GROUP" ,func_group ,PSSCAN_UIDGID },
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[1765] | 395 | { 16 , "comm" ,"COMMAND",func_comm ,PSSCAN_COMM },
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[2725] | 396 | { MAX_WIDTH , "args" ,"COMMAND",func_args ,PSSCAN_COMM },
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[1765] | 397 | { 5 , "pid" ,"PID" ,func_pid ,PSSCAN_PID },
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| 398 | { 5 , "ppid" ,"PPID" ,func_ppid ,PSSCAN_PPID },
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| 399 | { 5 , "pgid" ,"PGID" ,func_pgid ,PSSCAN_PGID },
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[2725] | 400 | #if ENABLE_FEATURE_PS_TIME
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| 401 | { sizeof("ELAPSED")-1, "etime" ,"ELAPSED",func_etime ,PSSCAN_START_TIME },
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| 402 | #endif
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| 403 | #if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
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| 404 | { 5 , "nice" ,"NI" ,func_nice ,PSSCAN_NICE },
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| 405 | { 8 , "rgroup","RGROUP" ,func_rgroup,PSSCAN_RUIDGID },
|
---|
| 406 | { 8 , "ruser" ,"RUSER" ,func_ruser ,PSSCAN_RUIDGID },
|
---|
| 407 | // { 5 , "pcpu" ,"%CPU" ,func_pcpu ,PSSCAN_ },
|
---|
| 408 | #endif
|
---|
| 409 | #if ENABLE_FEATURE_PS_TIME
|
---|
| 410 | { 6 , "time" ,"TIME" ,func_time ,PSSCAN_STIME | PSSCAN_UTIME },
|
---|
| 411 | #endif
|
---|
[1765] | 412 | { 6 , "tty" ,"TT" ,func_tty ,PSSCAN_TTY },
|
---|
| 413 | { 4 , "vsz" ,"VSZ" ,func_vsz ,PSSCAN_VSZ },
|
---|
[3232] | 414 | /* Not mandated, but useful: */
|
---|
| 415 | { 4 , "stat" ,"STAT" ,func_state ,PSSCAN_STATE },
|
---|
[1765] | 416 | { 4 , "rss" ,"RSS" ,func_rss ,PSSCAN_RSS },
|
---|
| 417 | #if ENABLE_SELINUX
|
---|
| 418 | { 35 , "label" ,"LABEL" ,func_label ,PSSCAN_CONTEXT },
|
---|
| 419 | #endif
|
---|
| 420 | };
|
---|
| 421 |
|
---|
| 422 | static ps_out_t* new_out_t(void)
|
---|
| 423 | {
|
---|
[2725] | 424 | out = xrealloc_vector(out, 2, out_cnt);
|
---|
| 425 | return &out[out_cnt++];
|
---|
[1765] | 426 | }
|
---|
| 427 |
|
---|
| 428 | static const ps_out_t* find_out_spec(const char *name)
|
---|
| 429 | {
|
---|
[2725] | 430 | unsigned i;
|
---|
| 431 | char buf[ARRAY_SIZE(out_spec)*7 + 1];
|
---|
| 432 | char *p = buf;
|
---|
| 433 |
|
---|
[1765] | 434 | for (i = 0; i < ARRAY_SIZE(out_spec); i++) {
|
---|
[2725] | 435 | if (strncmp(name, out_spec[i].name6, 6) == 0)
|
---|
[1765] | 436 | return &out_spec[i];
|
---|
[2725] | 437 | p += sprintf(p, "%.6s,", out_spec[i].name6);
|
---|
[1765] | 438 | }
|
---|
[2725] | 439 | p[-1] = '\0';
|
---|
| 440 | bb_error_msg_and_die("bad -o argument '%s', supported arguments: %s", name, buf);
|
---|
[1765] | 441 | }
|
---|
| 442 |
|
---|
| 443 | static void parse_o(char* opt)
|
---|
| 444 | {
|
---|
| 445 | ps_out_t* new;
|
---|
| 446 | // POSIX: "-o is blank- or comma-separated list" (FIXME)
|
---|
| 447 | char *comma, *equal;
|
---|
| 448 | while (1) {
|
---|
| 449 | comma = strchr(opt, ',');
|
---|
| 450 | equal = strchr(opt, '=');
|
---|
| 451 | if (comma && (!equal || equal > comma)) {
|
---|
| 452 | *comma = '\0';
|
---|
| 453 | *new_out_t() = *find_out_spec(opt);
|
---|
| 454 | *comma = ',';
|
---|
| 455 | opt = comma + 1;
|
---|
| 456 | continue;
|
---|
| 457 | }
|
---|
| 458 | break;
|
---|
| 459 | }
|
---|
| 460 | // opt points to last spec in comma separated list.
|
---|
| 461 | // This one can have =HEADER part.
|
---|
| 462 | new = new_out_t();
|
---|
| 463 | if (equal)
|
---|
| 464 | *equal = '\0';
|
---|
| 465 | *new = *find_out_spec(opt);
|
---|
| 466 | if (equal) {
|
---|
| 467 | *equal = '=';
|
---|
| 468 | new->header = equal + 1;
|
---|
| 469 | // POSIX: the field widths shall be ... at least as wide as
|
---|
| 470 | // the header text (default or overridden value).
|
---|
| 471 | // If the header text is null, such as -o user=,
|
---|
| 472 | // the field width shall be at least as wide as the
|
---|
| 473 | // default header text
|
---|
| 474 | if (new->header[0]) {
|
---|
| 475 | new->width = strlen(new->header);
|
---|
| 476 | print_header = 1;
|
---|
| 477 | }
|
---|
| 478 | } else
|
---|
| 479 | print_header = 1;
|
---|
| 480 | }
|
---|
| 481 |
|
---|
[2725] | 482 | static void alloc_line_buffer(void)
|
---|
[1765] | 483 | {
|
---|
| 484 | int i;
|
---|
| 485 | int width = 0;
|
---|
| 486 | for (i = 0; i < out_cnt; i++) {
|
---|
| 487 | need_flags |= out[i].ps_flags;
|
---|
| 488 | if (out[i].header[0]) {
|
---|
| 489 | print_header = 1;
|
---|
| 490 | }
|
---|
| 491 | width += out[i].width + 1; /* "FIELD " */
|
---|
[2725] | 492 | if ((int)(width - terminal_width) > 0) {
|
---|
| 493 | /* The rest does not fit on the screen */
|
---|
| 494 | //out[i].width -= (width - terminal_width - 1);
|
---|
| 495 | out_cnt = i + 1;
|
---|
| 496 | break;
|
---|
| 497 | }
|
---|
[1765] | 498 | }
|
---|
| 499 | #if ENABLE_SELINUX
|
---|
| 500 | if (!is_selinux_enabled())
|
---|
| 501 | need_flags &= ~PSSCAN_CONTEXT;
|
---|
| 502 | #endif
|
---|
| 503 | buffer = xmalloc(width + 1); /* for trailing \0 */
|
---|
| 504 | }
|
---|
| 505 |
|
---|
| 506 | static void format_header(void)
|
---|
| 507 | {
|
---|
| 508 | int i;
|
---|
| 509 | ps_out_t* op;
|
---|
| 510 | char *p;
|
---|
| 511 |
|
---|
| 512 | if (!print_header)
|
---|
| 513 | return;
|
---|
| 514 | p = buffer;
|
---|
| 515 | i = 0;
|
---|
| 516 | if (out_cnt) {
|
---|
| 517 | while (1) {
|
---|
| 518 | op = &out[i];
|
---|
| 519 | if (++i == out_cnt) /* do not pad last field */
|
---|
| 520 | break;
|
---|
| 521 | p += sprintf(p, "%-*s ", op->width, op->header);
|
---|
| 522 | }
|
---|
| 523 | strcpy(p, op->header);
|
---|
| 524 | }
|
---|
| 525 | printf("%.*s\n", terminal_width, buffer);
|
---|
| 526 | }
|
---|
| 527 |
|
---|
| 528 | static void format_process(const procps_status_t *ps)
|
---|
| 529 | {
|
---|
[821] | 530 | int i, len;
|
---|
[1765] | 531 | char *p = buffer;
|
---|
| 532 | i = 0;
|
---|
| 533 | if (out_cnt) while (1) {
|
---|
| 534 | out[i].f(p, out[i].width, ps);
|
---|
| 535 | // POSIX: Any field need not be meaningful in all
|
---|
| 536 | // implementations. In such a case a hyphen ( '-' )
|
---|
| 537 | // should be output in place of the field value.
|
---|
| 538 | if (!p[0]) {
|
---|
| 539 | p[0] = '-';
|
---|
| 540 | p[1] = '\0';
|
---|
| 541 | }
|
---|
| 542 | len = strlen(p);
|
---|
| 543 | p += len;
|
---|
| 544 | len = out[i].width - len + 1;
|
---|
| 545 | if (++i == out_cnt) /* do not pad last field */
|
---|
| 546 | break;
|
---|
| 547 | p += sprintf(p, "%*s", len, "");
|
---|
| 548 | }
|
---|
| 549 | printf("%.*s\n", terminal_width, buffer);
|
---|
| 550 | }
|
---|
[821] | 551 |
|
---|
[3232] | 552 | #if ENABLE_SELINUX
|
---|
| 553 | # define SELINUX_O_PREFIX "label,"
|
---|
| 554 | # define DEFAULT_O_STR (SELINUX_O_PREFIX "pid,user" IF_FEATURE_PS_TIME(",time") ",args")
|
---|
| 555 | #else
|
---|
| 556 | # define DEFAULT_O_STR ("pid,user" IF_FEATURE_PS_TIME(",time") ",args")
|
---|
| 557 | #endif
|
---|
| 558 |
|
---|
[2725] | 559 | int ps_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 560 | int ps_main(int argc UNUSED_PARAM, char **argv)
|
---|
[1765] | 561 | {
|
---|
| 562 | procps_status_t *p;
|
---|
| 563 | llist_t* opt_o = NULL;
|
---|
[3232] | 564 | char default_o[sizeof(DEFAULT_O_STR)];
|
---|
[2725] | 565 | int opt;
|
---|
| 566 | enum {
|
---|
| 567 | OPT_Z = (1 << 0),
|
---|
| 568 | OPT_o = (1 << 1),
|
---|
| 569 | OPT_a = (1 << 2),
|
---|
| 570 | OPT_A = (1 << 3),
|
---|
| 571 | OPT_d = (1 << 4),
|
---|
| 572 | OPT_e = (1 << 5),
|
---|
| 573 | OPT_f = (1 << 6),
|
---|
| 574 | OPT_l = (1 << 7),
|
---|
| 575 | OPT_T = (1 << 8) * ENABLE_FEATURE_SHOW_THREADS,
|
---|
| 576 | };
|
---|
[1765] | 577 |
|
---|
[2725] | 578 | INIT_G();
|
---|
| 579 |
|
---|
[1765] | 580 | // POSIX:
|
---|
| 581 | // -a Write information for all processes associated with terminals
|
---|
| 582 | // Implementations may omit session leaders from this list
|
---|
| 583 | // -A Write information for all processes
|
---|
| 584 | // -d Write information for all processes, except session leaders
|
---|
[2725] | 585 | // -e Write information for all processes (equivalent to -A)
|
---|
[1765] | 586 | // -f Generate a full listing
|
---|
| 587 | // -l Generate a long listing
|
---|
| 588 | // -o col1,col2,col3=header
|
---|
| 589 | // Select which columns to display
|
---|
[2725] | 590 | /* We allow (and ignore) most of the above. FIXME.
|
---|
| 591 | * -T is picked for threads (POSIX hasn't it standardized).
|
---|
| 592 | * procps v3.2.7 supports -T and shows tids as SPID column,
|
---|
| 593 | * it also supports -L where it shows tids as LWP column.
|
---|
| 594 | */
|
---|
[1765] | 595 | opt_complementary = "o::";
|
---|
[2725] | 596 | opt = getopt32(argv, "Zo:aAdefl"IF_FEATURE_SHOW_THREADS("T"), &opt_o);
|
---|
[1765] | 597 | if (opt_o) {
|
---|
| 598 | do {
|
---|
[2725] | 599 | parse_o(llist_pop(&opt_o));
|
---|
[1765] | 600 | } while (opt_o);
|
---|
| 601 | } else {
|
---|
[3232] | 602 | /* Below: parse_o() needs char*, NOT const char*, can't give it default_o */
|
---|
[821] | 603 | #if ENABLE_SELINUX
|
---|
[2725] | 604 | if (!(opt & OPT_Z) || !is_selinux_enabled()) {
|
---|
[1765] | 605 | /* no -Z or no SELinux: do not show LABEL */
|
---|
[2725] | 606 | strcpy(default_o, DEFAULT_O_STR + sizeof(SELINUX_O_PREFIX)-1);
|
---|
[1765] | 607 | } else
|
---|
[821] | 608 | #endif
|
---|
[1765] | 609 | {
|
---|
| 610 | strcpy(default_o, DEFAULT_O_STR);
|
---|
| 611 | }
|
---|
| 612 | parse_o(default_o);
|
---|
| 613 | }
|
---|
[2725] | 614 | #if ENABLE_FEATURE_SHOW_THREADS
|
---|
| 615 | if (opt & OPT_T)
|
---|
| 616 | need_flags |= PSSCAN_TASKS;
|
---|
| 617 | #endif
|
---|
[821] | 618 |
|
---|
[1765] | 619 | /* Was INT_MAX, but some libc's go belly up with printf("%.*s")
|
---|
| 620 | * and such large widths */
|
---|
| 621 | terminal_width = MAX_WIDTH;
|
---|
| 622 | if (isatty(1)) {
|
---|
| 623 | get_terminal_width_height(0, &terminal_width, NULL);
|
---|
| 624 | if (--terminal_width > MAX_WIDTH)
|
---|
| 625 | terminal_width = MAX_WIDTH;
|
---|
| 626 | }
|
---|
[2725] | 627 | alloc_line_buffer();
|
---|
[1765] | 628 | format_header();
|
---|
| 629 |
|
---|
| 630 | p = NULL;
|
---|
[2725] | 631 | while ((p = procps_scan(p, need_flags)) != NULL) {
|
---|
[1765] | 632 | format_process(p);
|
---|
| 633 | }
|
---|
| 634 |
|
---|
| 635 | return EXIT_SUCCESS;
|
---|
| 636 | }
|
---|
| 637 |
|
---|
| 638 |
|
---|
| 639 | #else /* !ENABLE_DESKTOP */
|
---|
| 640 |
|
---|
| 641 |
|
---|
[2725] | 642 | int ps_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 643 | int ps_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
|
---|
[1765] | 644 | {
|
---|
[2725] | 645 | procps_status_t *p;
|
---|
| 646 | int psscan_flags = PSSCAN_PID | PSSCAN_UIDGID
|
---|
| 647 | | PSSCAN_STATE | PSSCAN_VSZ | PSSCAN_COMM;
|
---|
| 648 | unsigned terminal_width IF_NOT_FEATURE_PS_WIDE(= 79);
|
---|
| 649 | enum {
|
---|
| 650 | OPT_Z = (1 << 0) * ENABLE_SELINUX,
|
---|
| 651 | OPT_T = (1 << ENABLE_SELINUX) * ENABLE_FEATURE_SHOW_THREADS,
|
---|
[3232] | 652 | OPT_l = (1 << ENABLE_SELINUX) * (1 << ENABLE_FEATURE_SHOW_THREADS) * ENABLE_FEATURE_PS_LONG,
|
---|
[2725] | 653 | };
|
---|
[3232] | 654 | #if ENABLE_FEATURE_PS_LONG
|
---|
| 655 | time_t now = now;
|
---|
| 656 | long uptime;
|
---|
| 657 | #endif
|
---|
| 658 | /* If we support any options, parse argv */
|
---|
| 659 | #if ENABLE_SELINUX || ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_PS_WIDE || ENABLE_FEATURE_PS_LONG
|
---|
[2725] | 660 | int opts = 0;
|
---|
| 661 | # if ENABLE_FEATURE_PS_WIDE
|
---|
| 662 | /* -w is a bit complicated */
|
---|
[821] | 663 | int w_count = 0;
|
---|
[1765] | 664 | opt_complementary = "-:ww";
|
---|
[3232] | 665 | opts = getopt32(argv, IF_SELINUX("Z")IF_FEATURE_SHOW_THREADS("T")IF_FEATURE_PS_LONG("l")
|
---|
| 666 | "w", &w_count);
|
---|
[821] | 667 | /* if w is given once, GNU ps sets the width to 132,
|
---|
| 668 | * if w is given more than once, it is "unlimited"
|
---|
| 669 | */
|
---|
[1765] | 670 | if (w_count) {
|
---|
[2725] | 671 | terminal_width = (w_count == 1) ? 132 : MAX_WIDTH;
|
---|
[821] | 672 | } else {
|
---|
[1765] | 673 | get_terminal_width_height(0, &terminal_width, NULL);
|
---|
[821] | 674 | /* Go one less... */
|
---|
[1765] | 675 | if (--terminal_width > MAX_WIDTH)
|
---|
| 676 | terminal_width = MAX_WIDTH;
|
---|
[821] | 677 | }
|
---|
[2725] | 678 | # else
|
---|
| 679 | /* -w is not supported, only -Z and/or -T */
|
---|
| 680 | opt_complementary = "-";
|
---|
[3232] | 681 | opts = getopt32(argv, IF_SELINUX("Z")IF_FEATURE_SHOW_THREADS("T")IF_FEATURE_PS_LONG("l"));
|
---|
[2725] | 682 | # endif
|
---|
| 683 |
|
---|
[3232] | 684 | # if ENABLE_SELINUX
|
---|
[2725] | 685 | if ((opts & OPT_Z) && is_selinux_enabled()) {
|
---|
| 686 | psscan_flags = PSSCAN_PID | PSSCAN_CONTEXT
|
---|
| 687 | | PSSCAN_STATE | PSSCAN_COMM;
|
---|
| 688 | puts(" PID CONTEXT STAT COMMAND");
|
---|
| 689 | } else
|
---|
[3232] | 690 | # endif
|
---|
| 691 | if (opts & OPT_l) {
|
---|
| 692 | psscan_flags = PSSCAN_STATE | PSSCAN_UIDGID | PSSCAN_PID | PSSCAN_PPID
|
---|
| 693 | | PSSCAN_TTY | PSSCAN_STIME | PSSCAN_UTIME | PSSCAN_COMM
|
---|
| 694 | | PSSCAN_VSZ | PSSCAN_RSS;
|
---|
| 695 | /* http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ps.html
|
---|
| 696 | * mandates for -l:
|
---|
| 697 | * -F Flags (?)
|
---|
| 698 | * S State
|
---|
| 699 | * UID,PID,PPID
|
---|
| 700 | * -C CPU usage
|
---|
| 701 | * -PRI The priority of the process; higher numbers mean lower priority
|
---|
| 702 | * -NI Nice value
|
---|
| 703 | * -ADDR The address of the process (?)
|
---|
| 704 | * SZ The size in blocks of the core image
|
---|
| 705 | * -WCHAN The event for which the process is waiting or sleeping
|
---|
| 706 | * TTY
|
---|
| 707 | * TIME The cumulative execution time
|
---|
| 708 | * CMD
|
---|
| 709 | * We don't show fields marked with '-'.
|
---|
| 710 | * We show VSZ and RSS instead of SZ.
|
---|
| 711 | * We also show STIME (standard says that -f shows it, -l doesn't).
|
---|
| 712 | */
|
---|
| 713 | puts("S UID PID PPID VSZ RSS TTY STIME TIME CMD");
|
---|
| 714 | # if ENABLE_FEATURE_PS_LONG
|
---|
| 715 | now = time(NULL);
|
---|
| 716 | uptime = get_uptime();
|
---|
| 717 | # endif
|
---|
| 718 | }
|
---|
| 719 | else {
|
---|
[2725] | 720 | puts(" PID USER VSZ STAT COMMAND");
|
---|
| 721 | }
|
---|
| 722 | if (opts & OPT_T) {
|
---|
| 723 | psscan_flags |= PSSCAN_TASKS;
|
---|
| 724 | }
|
---|
[3232] | 725 | #endif
|
---|
[821] | 726 |
|
---|
[2725] | 727 | p = NULL;
|
---|
| 728 | while ((p = procps_scan(p, psscan_flags)) != NULL) {
|
---|
| 729 | int len;
|
---|
[821] | 730 | #if ENABLE_SELINUX
|
---|
[2725] | 731 | if (psscan_flags & PSSCAN_CONTEXT) {
|
---|
| 732 | len = printf("%5u %-32.32s %s ",
|
---|
[1765] | 733 | p->pid,
|
---|
| 734 | p->context ? p->context : "unknown",
|
---|
| 735 | p->state);
|
---|
| 736 | } else
|
---|
| 737 | #endif
|
---|
| 738 | {
|
---|
[3232] | 739 | char buf6[6];
|
---|
| 740 | smart_ulltoa5(p->vsz, buf6, " mgtpezy");
|
---|
| 741 | buf6[5] = '\0';
|
---|
| 742 | #if ENABLE_FEATURE_PS_LONG
|
---|
| 743 | if (opts & OPT_l) {
|
---|
| 744 | char bufr[6], stime_str[6];
|
---|
| 745 | char tty[2 * sizeof(int)*3 + 2];
|
---|
| 746 | char *endp;
|
---|
| 747 | unsigned sut = (p->stime + p->utime) / 100;
|
---|
| 748 | unsigned elapsed = uptime - (p->start_time / 100);
|
---|
| 749 | time_t start = now - elapsed;
|
---|
| 750 | struct tm *tm = localtime(&start);
|
---|
| 751 |
|
---|
| 752 | smart_ulltoa5(p->rss, bufr, " mgtpezy");
|
---|
| 753 | bufr[5] = '\0';
|
---|
| 754 |
|
---|
| 755 | if (p->tty_major == 136)
|
---|
| 756 | /* It should be pts/N, not ptsN, but N > 9
|
---|
| 757 | * will overflow field width...
|
---|
| 758 | */
|
---|
| 759 | endp = stpcpy(tty, "pts");
|
---|
| 760 | else
|
---|
| 761 | if (p->tty_major == 4) {
|
---|
| 762 | endp = stpcpy(tty, "tty");
|
---|
| 763 | if (p->tty_minor >= 64) {
|
---|
| 764 | p->tty_minor -= 64;
|
---|
| 765 | *endp++ = 'S';
|
---|
| 766 | }
|
---|
| 767 | }
|
---|
| 768 | else
|
---|
| 769 | endp = tty + sprintf(tty, "%d:", p->tty_major);
|
---|
| 770 | strcpy(endp, utoa(p->tty_minor));
|
---|
| 771 |
|
---|
| 772 | strftime(stime_str, 6, (elapsed >= (24 * 60 * 60)) ? "%b%d" : "%H:%M", tm);
|
---|
| 773 | stime_str[5] = '\0';
|
---|
| 774 | // S UID PID PPID VSZ RSS TTY STIME TIME CMD
|
---|
| 775 | len = printf("%c %5u %5u %5u %5s %5s %-5s %s %02u:%02u:%02u ",
|
---|
| 776 | p->state[0], p->uid, p->pid, p->ppid, buf6, bufr, tty,
|
---|
| 777 | stime_str, sut / 3600, (sut % 3600) / 60, sut % 60);
|
---|
| 778 | } else
|
---|
| 779 | #endif
|
---|
[2725] | 780 | {
|
---|
[3232] | 781 | const char *user = get_cached_username(p->uid);
|
---|
[2725] | 782 | len = printf("%5u %-8.8s %s %s ",
|
---|
| 783 | p->pid, user, buf6, p->state);
|
---|
| 784 | }
|
---|
[821] | 785 | }
|
---|
| 786 |
|
---|
[1765] | 787 | {
|
---|
| 788 | int sz = terminal_width - len;
|
---|
| 789 | char buf[sz + 1];
|
---|
| 790 | read_cmdline(buf, sz, p->pid, p->comm);
|
---|
| 791 | puts(buf);
|
---|
[821] | 792 | }
|
---|
| 793 | }
|
---|
[1765] | 794 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
| 795 | clear_username_cache();
|
---|
[821] | 796 | return EXIT_SUCCESS;
|
---|
| 797 | }
|
---|
[1765] | 798 |
|
---|
[2725] | 799 | #endif /* !ENABLE_DESKTOP */
|
---|