summaryrefslogtreecommitdiff
path: root/libbb/find_pid_by_name.c
diff options
context:
space:
mode:
authorEric Andersen2002-10-22 12:21:15 +0000
committerEric Andersen2002-10-22 12:21:15 +0000
commit44608e9693b03661fbab5e27650bb040c6871d11 (patch)
tree4555230653cdb82d998f076b29130d8fe18a6f7a /libbb/find_pid_by_name.c
parent1887b0478f2743ce7808e8b37462e18d584611e1 (diff)
downloadbusybox-44608e9693b03661fbab5e27650bb040c6871d11.zip
busybox-44608e9693b03661fbab5e27650bb040c6871d11.tar.gz
Patch last_pach62 from vodz. This patch moves all the /proc parsing
code into libbb so it can be shared by ps, top, etc, saving over 1.5k.
Diffstat (limited to 'libbb/find_pid_by_name.c')
-rw-r--r--libbb/find_pid_by_name.c54
1 files changed, 10 insertions, 44 deletions
diff --git a/libbb/find_pid_by_name.c b/libbb/find_pid_by_name.c
index 4eaee03..a648137 100644
--- a/libbb/find_pid_by_name.c
+++ b/libbb/find_pid_by_name.c
@@ -22,7 +22,6 @@
#include <stdio.h>
#include <ctype.h>
#include <string.h>
-#include <dirent.h>
#include <stdlib.h>
#include "libbb.h"
@@ -40,7 +39,7 @@
*
* Returns a list of all matching PIDs
*/
-extern long* find_pid_by_name( char* pidName)
+extern long* find_pid_by_name( const char* pidName)
{
int fd, i, j;
char device[] = "/dev/ps";
@@ -112,61 +111,28 @@ extern long* find_pid_by_name( char* pidName)
/* find_pid_by_name()
*
+ * 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
*/
-extern long* find_pid_by_name( char* pidName)
+extern long* find_pid_by_name( const char* pidName)
{
- DIR *dir;
- struct dirent *next;
- long* pidList=NULL;
+ long* pidList;
int i=0;
+ procps_status_t * p;
- 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 = xmalloc(sizeof(long));
+ while ((p = procps_scan(0)) != 0) {
+ if (strcmp(p->short_cmd, pidName) == 0) {
pidList=xrealloc( pidList, sizeof(long) * (i+2));
- pidList[i++]=strtol(next->d_name, NULL, 0);
+ pidList[i++]=p->pid;
}
}
- if (pidList) {
- pidList[i]=0;
- } else {
- pidList=xrealloc( pidList, sizeof(long));
- pidList[0]=-1;
- }
+ pidList[i] = i==0 ? -1 : 0;
return pidList;
}
#endif /* CONFIG_FEATURE_USE_DEVPS_PATCH */