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Patch last_pach62 from vodz. This patch moves all the /proc parsing

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code into libbb so it can be shared by ps, top, etc, saving over 1.5k.
This commit is contained in:
Eric Andersen
2002-10-22 12:21:15 +00:00
parent 1887b0478f
commit 44608e9693
8 changed files with 223 additions and 315 deletions
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54
libbb/find_pid_by_name.c
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@@ -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 */