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459e4d6cf7
Use it where appropriate. Stop scanning /etc/passwd *for every process*!!! (uid->username) top: reduce memory usage - we won't save unneeded fields from /proc info anymore. Downside: ~+250 bytes of code
56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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*/
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#include "libbb.h"
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/* find_pid_by_name()
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*
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* Modified by Vladimir Oleynik for use with libbb/procps.c
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* This finds the pid of the specified process.
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* Currently, it's implemented by rummaging through
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* the proc filesystem.
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*
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* Returns a list of all matching PIDs
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* It is the caller's duty to free the returned pidlist.
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*/
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pid_t* find_pid_by_name(const char* procName)
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{
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pid_t* pidList;
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int i = 0;
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procps_status_t* p = NULL;
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pidList = xmalloc(sizeof(*pidList));
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while ((p = procps_scan(p, PSSCAN_PID|PSSCAN_COMM))) {
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if (strncmp(p->comm, procName, sizeof(p->comm)-1) == 0) {
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pidList = xrealloc(pidList, sizeof(*pidList) * (i+2));
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pidList[i++] = p->pid;
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}
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}
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pidList[i] = 0;
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return pidList;
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}
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pid_t *pidlist_reverse(pid_t *pidList)
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{
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int i = 0;
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while (pidList[i])
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i++;
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if (--i >= 0) {
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pid_t k;
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int j;
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for (j = 0; i > j; i--, j++) {
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k = pidList[i];
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pidList[i] = pidList[j];
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pidList[j] = k;
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}
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}
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return pidList;
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}
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