Contents of /trunk/mkinitrd-magellan/busybox/libbb/find_pid_by_name.c
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Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
File MIME type: text/plain
File size: 1174 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Utility routines. |
4 | * |
5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
6 | * |
7 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. |
8 | */ |
9 | |
10 | #include "libbb.h" |
11 | |
12 | /* find_pid_by_name() |
13 | * |
14 | * Modified by Vladimir Oleynik for use with libbb/procps.c |
15 | * This finds the pid of the specified process. |
16 | * Currently, it's implemented by rummaging through |
17 | * the proc filesystem. |
18 | * |
19 | * Returns a list of all matching PIDs |
20 | * It is the caller's duty to free the returned pidlist. |
21 | */ |
22 | pid_t* find_pid_by_name(const char* procName) |
23 | { |
24 | pid_t* pidList; |
25 | int i = 0; |
26 | procps_status_t* p = NULL; |
27 | |
28 | pidList = xmalloc(sizeof(*pidList)); |
29 | while ((p = procps_scan(p, PSSCAN_PID|PSSCAN_COMM))) { |
30 | if (strncmp(p->comm, procName, sizeof(p->comm)-1) == 0) { |
31 | pidList = xrealloc(pidList, sizeof(*pidList) * (i+2)); |
32 | pidList[i++] = p->pid; |
33 | } |
34 | } |
35 | |
36 | pidList[i] = 0; |
37 | return pidList; |
38 | } |
39 | |
40 | pid_t *pidlist_reverse(pid_t *pidList) |
41 | { |
42 | int i = 0; |
43 | while (pidList[i]) |
44 | i++; |
45 | if (--i >= 0) { |
46 | pid_t k; |
47 | int j; |
48 | for (j = 0; i > j; i--, j++) { |
49 | k = pidList[i]; |
50 | pidList[i] = pidList[j]; |
51 | pidList[j] = k; |
52 | } |
53 | } |
54 | return pidList; |
55 | } |