/*
* Utility routines.
*
- * Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org>
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
-#include <stdio.h>
-#include <ctype.h>
-#include <string.h>
-#include <dirent.h>
-#include <stdlib.h>
#include "libbb.h"
-#define READ_BUF_SIZE 50
-
-
-/* For Erik's nifty devps device driver */
-#ifdef CONFIG_FEATURE_USE_DEVPS_PATCH
-#include <linux/devps.h>
-
/* find_pid_by_name()
- *
- * This finds the pid of the specified process,
- * by using the /dev/ps device driver.
+ *
+ * Modified by Vladimir Oleynik for use with libbb/procps.c
+ * This finds the pid of the specified process.
+ * Currently, it's implemented by rummaging through
+ * the proc filesystem.
*
* Returns a list of all matching PIDs
+ * It is the caller's duty to free the returned pidlist.
*/
-extern pid_t* find_pid_by_name( char* pidName)
+pid_t* find_pid_by_name(const char* procName)
{
- int fd, i, j;
- char device[] = "/dev/ps";
- pid_t num_pids;
- pid_t* pid_array = NULL;
- pid_t* pidList=NULL;
-
- /* open device */
- fd = open(device, O_RDONLY);
- if (fd < 0)
- perror_msg_and_die("open failed for `%s'", device);
-
- /* Find out how many processes there are */
- if (ioctl (fd, DEVPS_GET_NUM_PIDS, &num_pids)<0)
- perror_msg_and_die("\nDEVPS_GET_PID_LIST");
-
- /* Allocate some memory -- grab a few extras just in case
- * some new processes start up while we wait. The kernel will
- * just ignore any extras if we give it too many, and will trunc.
- * the list if we give it too few. */
- pid_array = (pid_t*) xcalloc( num_pids+10, sizeof(pid_t));
- pid_array[0] = num_pids+10;
-
- /* Now grab the pid list */
- if (ioctl (fd, DEVPS_GET_PID_LIST, pid_array)<0)
- perror_msg_and_die("\nDEVPS_GET_PID_LIST");
-
- /* Now search for a match */
- for (i=1, j=0; i<pid_array[0] ; i++) {
- char* p;
- struct pid_info info;
-
- info.pid = pid_array[i];
- if (ioctl (fd, DEVPS_GET_PID_INFO, &info)<0)
- perror_msg_and_die("\nDEVPS_GET_PID_INFO");
-
- /* Make sure we only match on the process name */
- p=info.command_line+1;
- while ((*p != 0) && !isspace(*(p)) && (*(p-1) != '\\')) {
- (p)++;
+ pid_t* pidList;
+ int i = 0;
+ procps_status_t* p;
+
+ pidList = xmalloc(sizeof(*pidList));
+ while ((p = procps_scan(0)) != 0) {
+ if (strncmp(p->short_cmd, procName, COMM_LEN-1) == 0) {
+ pidList = xrealloc(pidList, sizeof(*pidList) * (i+2));
+ pidList[i++] = p->pid;
}
- if (isspace(*(p)))
- *p='\0';
-
- if ((strstr(info.command_line, pidName) != NULL)
- && (strlen(pidName) == strlen(info.command_line))) {
- pidList=xrealloc( pidList, sizeof(pid_t) * (j+2));
- pidList[j++]=info.pid;
- }
- }
- if (pidList) {
- pidList[j]=0;
- } else if ( strcmp(pidName, "init")==0) {
- /* If we found nothing and they were trying to kill "init",
- * guess PID 1 and call it good... Perhaps we should simply
- * exit if /proc isn't mounted, but this will do for now. */
- pidList=xrealloc( pidList, sizeof(pid_t));
- pidList[0]=1;
- } else {
- pidList=xrealloc( pidList, sizeof(pid_t));
- pidList[0]=-1;
}
- /* Free memory */
- free( pid_array);
-
- /* close device */
- if (close (fd) != 0)
- perror_msg_and_die("close failed for `%s'", device);
-
+ pidList[i] = 0;
return pidList;
}
-#else /* CONFIG_FEATURE_USE_DEVPS_PATCH */
-
-/* find_pid_by_name()
- *
- * This finds the pid of the specified process.
- * Currently, it's implemented by rummaging through
- * the proc filesystem.
- *
- * Returns a list of all matching PIDs
- */
-extern pid_t* find_pid_by_name( char* pidName)
+pid_t *pidlist_reverse(pid_t *pidList)
{
- DIR *dir;
- struct dirent *next;
- pid_t* pidList=NULL;
- int i=0;
-
- dir = opendir("/proc");
- if (!dir)
- perror_msg_and_die("Cannot open /proc");
-
- while ((next = readdir(dir)) != NULL) {
- FILE *status;
- char filename[READ_BUF_SIZE];
- char buffer[READ_BUF_SIZE];
- char name[READ_BUF_SIZE];
-
- /* Must skip ".." since that is outside /proc */
- if (strcmp(next->d_name, "..") == 0)
- continue;
-
- /* If it isn't a number, we don't want it */
- if (!isdigit(*next->d_name))
- continue;
-
- sprintf(filename, "/proc/%s/status", next->d_name);
- if (! (status = fopen(filename, "r")) ) {
- continue;
- }
- if (fgets(buffer, READ_BUF_SIZE-1, status) == NULL) {
- fclose(status);
- continue;
- }
- fclose(status);
-
- /* Buffer should contain a string like "Name: binary_name" */
- sscanf(buffer, "%*s %s", name);
- if (strcmp(name, pidName) == 0) {
- pidList=xrealloc( pidList, sizeof(pid_t) * (i+2));
- pidList[i++]=strtol(next->d_name, NULL, 0);
+ int i = 0;
+ while (pidList[i])
+ i++;
+ if (--i >= 0) {
+ pid_t k;
+ int j;
+ for (j = 0; i > j; i--, j++) {
+ k = pidList[i];
+ pidList[i] = pidList[j];
+ pidList[j] = k;
}
}
-
- if (pidList)
- pidList[i]=0;
- else if ( strcmp(pidName, "init")==0) {
- /* If we found nothing and they were trying to kill "init",
- * guess PID 1 and call it good... Perhaps we should simply
- * exit if /proc isn't mounted, but this will do for now. */
- pidList=xrealloc( pidList, sizeof(pid_t));
- pidList[0]=1;
- } else {
- pidList=xrealloc( pidList, sizeof(pid_t));
- pidList[0]=-1;
- }
return pidList;
}
-#endif /* CONFIG_FEATURE_USE_DEVPS_PATCH */
-
-/* END CODE */
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/
projects / oweals / busybox.git / blobdiff