I hereby relicense all my work on Sortix under the ISC license as below. All Sortix contributions by other people are already under this license, are not substantial enough to be copyrightable, or have been removed. All imported code from other projects is compatible with this license. All GPL licensed code from other projects had previously been removed. Copyright 2011-2016 Jonas 'Sortie' Termansen and contributors. Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
195 lines
4.8 KiB
C
195 lines
4.8 KiB
C
/*
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* Copyright (c) 2015 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* ps.c
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* Lists processes.
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*/
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#include <sys/types.h>
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#include <err.h>
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#include <errno.h>
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#include <locale.h>
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#include <psctl.h>
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#include <pwd.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static char* get_program_path_of_pid(pid_t pid)
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{
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struct psctl_program_path ctl;
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memset(&ctl, 0, sizeof(ctl));
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ctl.buffer = NULL;
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ctl.size = 0;
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if ( psctl(pid, PSCTL_PROGRAM_PATH, &ctl) < 0 )
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return NULL;
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while ( true )
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{
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char* new_buffer = (char*) realloc(ctl.buffer, ctl.size);
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if ( !new_buffer )
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return free(ctl.buffer), (char*) NULL;
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ctl.buffer = new_buffer;
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if ( psctl(pid, PSCTL_PROGRAM_PATH, &ctl) == 0 )
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return ctl.buffer;
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if ( errno != ERANGE )
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return free(ctl.buffer), (char*) NULL;
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}
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}
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static void compact_arguments(int* argc, char*** argv)
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{
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for ( int i = 0; i < *argc; i++ )
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{
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while ( i < *argc && !(*argv)[i] )
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{
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for ( int n = i; n < *argc; n++ )
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(*argv)[n] = (*argv)[n+1];
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(*argc)--;
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}
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}
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}
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static void help(FILE* fp, const char* argv0)
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{
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fprintf(fp, "Usage: %s [OPTION]...\n", argv0);
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fprintf(fp, "List processes.\n");
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}
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static void version(FILE* fp, const char* argv0)
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{
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fprintf(fp, "%s (Sortix) %s\n", argv0, VERSIONSTR);
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}
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int main(int argc, char* argv[])
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{
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setlocale(LC_ALL, "");
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bool select_all = false;
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bool show_full = false;
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bool show_long = false;
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const char* argv0 = argv[0];
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for ( int i = 1; i < argc; i++ )
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{
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const char* arg = argv[i];
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if ( arg[0] != '-' || !arg[1] )
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continue;
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argv[i] = NULL;
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if ( !strcmp(arg, "--") )
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break;
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if ( arg[1] != '-' )
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{
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char c;
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while ( (c = *++arg) ) switch ( c )
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{
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case 'a': select_all = true; break;
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case 'A': select_all = true; break;
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case 'd': select_all = true; break;
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case 'e': select_all = true; break;
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case 'f': show_full = true; break;
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//case 'g': break;
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//case 'G': break;
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case 'l': show_long = true; break;
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//case 'n': break;
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//case 'o': break;
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//case 'p': break;
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//case 't': break;
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//case 'u': break;
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//case 'U': break;
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default:
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fprintf(stderr, "%s: unknown option -- '%c'\n", argv0, c);
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help(stderr, argv0);
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exit(1);
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}
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}
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else if ( !strcmp(arg, "--help") )
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help(stdout, argv0), exit(0);
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else if ( !strcmp(arg, "--version") )
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version(stdout, argv0), exit(0);
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else
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{
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fprintf(stderr, "%s: unknown option: %s\n", argv0, arg);
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help(stderr, argv0);
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exit(1);
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}
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}
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compact_arguments(&argc, &argv);
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if ( 1 < argc )
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err(1, "extra operand: %s", argv[1]);
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if ( show_full || show_long )
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printf("UID\t");
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printf("PID\t");
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if ( show_full || show_long )
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printf("PPID\t");
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if ( show_long )
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printf("NI ");
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printf("TTY ");
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printf("TIME\t ");
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printf("CMD\n");
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pid_t pid = 0;
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while ( true )
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{
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struct psctl_next_pid ctl_next_pid;
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if ( psctl(pid, PSCTL_NEXT_PID, &ctl_next_pid) < 0 )
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err(1, "psctl: PSCTL_NEXT_PID");
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if ( (pid = ctl_next_pid.next_pid) == -1 )
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break;
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struct psctl_stat psst;
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if ( psctl(pid, PSCTL_STAT, &psst) < 0 )
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{
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if ( errno != ESRCH )
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warn("psctl: PSCTL_STAT: [%" PRIiPID "]", pid);
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continue;
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}
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if ( !select_all && psst.euid != geteuid() )
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continue;
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if ( show_full )
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{
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struct passwd* pwd = getpwuid(psst.uid);
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if ( pwd )
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printf("%s\t", pwd->pw_name);
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else
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printf("%" PRIuUID "\t", psst.uid);
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}
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else if ( show_long )
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printf("%" PRIuUID "\t", psst.uid);
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printf("%" PRIiPID "\t", pid);
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if ( show_full || show_long )
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printf("%" PRIiPID "\t", psst.ppid);
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if ( show_long )
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printf("%-4i", psst.nice);
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printf("tty ");
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time_t time = psst.tmns.tmns_utime.tv_sec;
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int hours = (time / (60 * 60)) % 24;
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int minutes = (time / 60) % 60;
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int seconds = (time / 1) % 60;
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printf("%02i:%02i:%02i ", hours, minutes, seconds);
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char* program_path = get_program_path_of_pid(pid);
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// TODO: Strip special characters from the process name lest an attacker
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// do things to the user's terminal.
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printf("%s", program_path ? program_path : "<unknown>");
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free(program_path);
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printf("\n");
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}
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return ferror(stdout) || fflush(stdout) == EOF ? 1 : 0;
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}
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