freebsd_getprocs.c

### NOTE: partly generated by ChatGTP 4. 
# compile with -lkvm

#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#include <fcntl.h>
#include <kvm.h>
#include <limits.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

int main() {
    kvm_t *kd;
    char errbuf[_POSIX2_LINE_MAX];
    struct kinfo_proc *proc;
    int count, i;
    char **args;

    kd = kvm_open(NULL, _PATH_DEVNULL, NULL, O_RDONLY, errbuf);
    if (kd == NULL) {
        fprintf(stderr, "Error opening kvm: %s\n", errbuf);
        exit(1);
    }

    proc = kvm_getprocs(kd, KERN_PROC_PROC, 0, &count);
    if (proc == NULL) {
        fprintf(stderr, "Error getting process info: %s\n", kvm_geterr(kd));
        kvm_close(kd);
        exit(1);
    }

    for (i = 0; i < count; i++) {
        printf("%d\t%si\t", proc[i].ki_pid, proc[i].ki_comm);

        args = kvm_getargv(kd, &proc[i], 0);
        if (args != NULL && args[0] != NULL) {
            for (int j = 0; args[j] != NULL; j++) {
                printf(" %s", args[j]);
            }
        }
        printf("\n");
    }

    kvm_close(kd);
    return 0;
}