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present for Jim

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This commit is contained in:
albert
2002-12-03 09:07:59 +00:00
parent 538f249009
commit 7ac9a0e1f5
8 changed files with 100 additions and 38 deletions
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113
proc/readproc.c
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@@ -14,6 +14,7 @@
#include "procps.h"
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
@@ -74,19 +75,35 @@ void freeproc(proc_t* p) {
static void status2proc(const char *S, proc_t *restrict P, int fill){
static void status2proc(const char *S, proc_t *restrict P){
char* tmp;
if (fill == 1) {
memset(P->cmd, 0, sizeof P->cmd);
sscanf (S, "Name:\t%15c", P->cmd);
tmp = strchr(P->cmd,'\n');
*tmp='\0';
tmp = strstr (S,"State");
sscanf (tmp, "State:\t%c", &P->state);
int i;
// The cmd is escaped, with \\ and \n for backslash and newline.
// It certainly may contain "VmSize:" and similar crap.
if(unlikely(strncmp("Name:\t",S,6))) fprintf(stderr, "Internal error!\n");
S += 6;
i = 0;
while(i < sizeof P->cmd - 1){
int c = *S++;
if(unlikely(c=='\n')) break;
if(unlikely(c=='\0')) return; // should never happen
if(unlikely(c=='\\')){
c = *S++;
if(c=='\n') break; // should never happen
if(!c) break; // should never happen
if(c=='n') c='\n'; // else we assume it is '\\'
}
P->cmd[i++] = c;
}
P->cmd[i] = '\0';
tmp = strstr (S,"State:\t");
if(likely((long)tmp)) P->state = tmp[7];
else fprintf(stderr, "Internal error!\n");
tmp = strstr (S,"Pid:");
if(tmp) sscanf (tmp,
if(likely((long)tmp)) sscanf (tmp,
"Pid:\t%d\n"
"PPid:\t%d\n",
&P->pid,
@@ -95,21 +112,21 @@ static void status2proc(const char *S, proc_t *restrict P, int fill){
else fprintf(stderr, "Internal error!\n");
tmp = strstr (S,"Uid:");
if(tmp) sscanf (tmp,
if(likely((long)tmp)) sscanf (tmp,
"Uid:\t%d\t%d\t%d\t%d",
&P->ruid, &P->euid, &P->suid, &P->fuid
);
else fprintf(stderr, "Internal error!\n");
tmp = strstr (S,"Gid:");
if(tmp) sscanf (tmp,
if(likely((long)tmp)) sscanf (tmp,
"Gid:\t%d\t%d\t%d\t%d",
&P->rgid, &P->egid, &P->sgid, &P->fgid
);
else fprintf(stderr, "Internal error!\n");
tmp = strstr (S,"VmSize:");
if(tmp) sscanf (tmp,
if(likely((long)tmp)) sscanf (tmp,
"VmSize: %lu kB\n"
"VmLck: %lu kB\n"
"VmRSS: %lu kB\n"
@@ -132,7 +149,7 @@ static void status2proc(const char *S, proc_t *restrict P, int fill){
}
tmp = strstr (S,"SigPnd:");
if(tmp) sscanf (tmp,
if(likely((long)tmp)) sscanf (tmp,
#ifdef SIGNAL_STRING
"SigPnd: %s SigBlk: %s SigIgn: %s %*s %s",
P->signal, P->blocked, P->sigignore, P->sigcatch
@@ -153,17 +170,25 @@ static void status2proc(const char *S, proc_t *restrict P, int fill){
*/
static void stat2proc(const char* S, proc_t *restrict P) {
int num;
char* tmp = strrchr(S, ')'); /* split into "PID (cmd" and "<rest>" */
*tmp = '\0'; /* replace trailing ')' with NUL */
char* tmp;
/* fill in default values for older kernels */
P->exit_signal = SIGCHLD;
P->processor = 0;
P->rtprio = -1;
P->sched = -1;
/* parse these two strings separately, skipping the leading "(". */
memset(P->cmd, 0, sizeof P->cmd); /* clear even though *P xcalloc'd ?! */
sscanf(S, "%d (%15c", &P->pid, P->cmd); /* comm[16] in kernel */
num = sscanf(tmp + 2, /* skip space after ')' too */
P->pid = strtol(S, &tmp, 10);
S = tmp + 2;
tmp = strrchr(S, ')'); // split into "PID (cmd" and "<rest>"
num = tmp - S;
if(unlikely(num > sizeof P->cmd)) num = sizeof P->cmd; // 1 too big
num--; // ditch the ')' character
memcpy(P->cmd, S, num);
P->cmd[num] = '\0';
S = tmp + 2; // skip ") "
num = sscanf(S,
"%c "
"%d %d %d %d %d "
"%lu %lu %lu %lu %lu "
@@ -193,10 +218,6 @@ static void stat2proc(const char* S, proc_t *restrict P) {
/* -- Linux 2.2.8 to 2.5.17 end here -- */
&P->rtprio, &P->sched /* both added to 2.5.18 */
);
/* fprintf(stderr, "stat2proc converted %d fields.\n",num); */
if (P->tty == 0)
P->tty = -1; /* the old notty val, update elsewhere bef. moving to 0 */
}
static void statm2proc(const char* s, proc_t *restrict P) {
@@ -212,8 +233,10 @@ static int file2str(const char *directory, const char *what, char *ret, int cap)
int fd, num_read;
sprintf(filename, "%s/%s", directory, what);
if ( (fd = open(filename, O_RDONLY, 0)) == -1 ) return -1;
if ( (num_read = read(fd, ret, cap - 1)) <= 0 ) num_read = -1;
fd = open(filename, O_RDONLY, 0);
if(unlikely(fd==-1)) return -1;
num_read = read(fd, ret, cap - 1);
if(unlikely(num_read<=0)) num_read = -1;
else ret[num_read] = 0;
close(fd);
return num_read;
@@ -226,7 +249,8 @@ static char** file2strvec(const char* directory, const char* what) {
int align;
sprintf(buf, "%s/%s", directory, what);
if ( (fd = open(buf, O_RDONLY, 0) ) == -1 ) return NULL;
fd = open(buf, O_RDONLY, 0);
if(fd==-1) return NULL;
/* read whole file into a memory buffer, allocating as we go */
while ((n = read(fd, buf, sizeof buf - 1)) > 0) {
@@ -272,6 +296,37 @@ static char** file2strvec(const char* directory, const char* what) {
return ret;
}
// warning: interface may change
int read_cmdline(char *restrict const dst, unsigned sz, unsigned pid){
char name[32];
int fd;
int n = 0;
snprintf(name, sizeof name, "/proc/%u/cmdline", pid);
fd = open(name, O_RDONLY);
if(fd==-1) return NULL;
dst[0] = '\0';
for(;;){
ssize_t r = read(fd,dst+n,sz-n);
if(r==-1){
if(errno==EINTR) continue;
break;
}
n += r;
if(n==sz) break; // filled the buffer
if(r==0) break; // EOF
}
if(n){
int i;
if(n==sz) n--;
dst[n] = '\0';
i=n;
while(i--){
int c = dst[i];
if(c<' ' || c>'~') dst[i]=' ';
}
}
return n;
}
/* These are some nice GNU C expression subscope "inline" functions.
* The can be used with arbitrary types and evaluate their arguments
@@ -361,7 +416,7 @@ next_proc: /* get next PID for consideration */
if (flags & PROC_FILLSTATUS) { /* read, parse /proc/#/status */
if ((file2str(path, "status", sbuf, sizeof sbuf)) != -1 ){
status2proc(sbuf, p, 0 /*FIXME*/);
status2proc(sbuf, p);
}
}
@@ -459,7 +514,7 @@ next_proc: /* get next PID for consideration */
/* if (flags & PROC_FILLSTATUS) { */ /* read, parse /proc/#/status */
if ((file2str(path, "status", sbuf, sizeof sbuf)) != -1 ){
status2proc(sbuf, p, 0 /*FIXME*/);
status2proc(sbuf, p);
}
/* }*/
@@ -509,7 +564,7 @@ void look_up_our_self(proc_t *p) {
file2str(path, "statm", sbuf, sizeof sbuf);
statm2proc(sbuf, p); /* ignore statm errors here */
file2str(path, "status", sbuf, sizeof sbuf);
status2proc(sbuf, p, 0 /*FIXME*/);
status2proc(sbuf, p);
}