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annotate toys/pending/killall5.c @ 1349:bf2e5591bdf0 draft

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Cleanup strings.
author Rob Landley <rob@landley.net>
date Wed, 11 Jun 2014 08:02:55 -0500
parents 78a3eaf5555f
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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78a3eaf5555f killall5 - kill all the processes not in its session.
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1 /* killall5.c - Send signal (default: TERM) to all processes outside current session.
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2 *
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3 * Copyright 2014 Ranjan Kumar <ranjankumar.bth@gmail.com>
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4 * Copyright 2014 Kyungwan Han <asura321@gamil.com>
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5 *
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6 * No Standard
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7
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8 USE_KILLALL5(NEWTOY(killall5, "?o*ls:[!lo]", TOYFLAG_SBIN))
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9
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10 config KILLALL5
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11 bool "killall5"
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12 default n
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13 help
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14 usage: killall5 [-l] [-SIGNAL|-s SIGNAL] [-o PID]...
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15
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16 Send a signal (default: TERM) to all processes outside current session.
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17
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18 -l List all signal names and numbers
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19 -o PID Don't signal this PID
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20 -s send SIGNAL instead of SIGTERM
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21 */
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22 #define FOR_killall5
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23 #include "toys.h"
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24
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25 GLOBALS(
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26 char *signame;
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27 struct arg_list *olist;
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28 )
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29
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30 void killall5_main(void)
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31 {
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32 DIR *dp;
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33 struct dirent *entry;
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34 int signo, pid, sid, signum = SIGTERM;
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35 long *olist = NULL, ocount = 0;
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36 char *s, **args = toys.optargs;
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37
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38 // list all signal names and numbers
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39 if (toys.optflags & FLAG_l) {
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40 if (*args) {
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41 for (; *args; args++) {
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42 signo = sig_to_num(*args);
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43 if (isdigit(**args) && (s = num_to_sig(signo&127))) xputs(s);
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44 else if (signo > 0) xprintf("%d\n", signo);
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45 else error_exit("UNKNOWN signal '%s'", *args);
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46 }
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47 } else sig_to_num(NULL);
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48 return;
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49 }
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50
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51 // when SIGNUM will be in the form of -SIGNUM
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52 if (TT.signame || (*args && **args == '-')) {
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53 if (0 > (signum = sig_to_num(TT.signame ? TT.signame : (*args)+1)))
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54 error_exit("Unknown signal '%s'", *args);
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55 if (!TT.signame) args++;
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56 }
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57 pid = getpid();
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58 sid = getsid(pid);
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59
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60 // prepare omit list
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61 if (toys.optflags & FLAG_o) {
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62 struct arg_list *ptr = TT.olist;
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63
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64 if (*args) error_exit("invalid omit list");
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65 for (; ptr; ptr=ptr->next) {
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66 long val = atolx(ptr->arg);
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67 olist = xrealloc(olist, (ocount+1)*sizeof(long));
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68 olist[ocount++] = val;
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69 }
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70 }
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71
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72 if (!(dp = opendir("/proc"))) perror_exit("opendir");
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73 while ((entry = readdir(dp))) {
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74 int count, procpid, procsid;
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75
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76 if (!(procpid = atoi(entry->d_name))) continue;
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77 snprintf(toybuf, sizeof(toybuf), "/proc/%d/stat", procpid);
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78 if (!readfile(toybuf, toybuf, sizeof(toybuf))) continue;
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79 if (sscanf(toybuf, "%*d %*s %*c %*d %*d %d", &procsid) != 1) continue;
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80 if (pid == procpid || sid == procsid || procpid == 1) continue;
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81
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82 // Check for kernel threads.
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83 snprintf(toybuf, sizeof(toybuf), "/proc/%d/cmdline", procpid);
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84 if (readfile(toybuf, toybuf, sizeof(toybuf)) && !*toybuf) continue;
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85
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86 // Check with omit list.
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87 if (toys.optflags & FLAG_o) {
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88 for (count = 0; count < ocount; count++) {
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89 if (procpid == olist[count]) goto OMIT;
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90 }
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91 }
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92 kill(procpid, signum);
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93 OMIT: ;
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94 }
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95 closedir(dp);
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96 if (CFG_TOYBOX_FREE && olist) free(olist);
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97 }