Get process name and argv in Solaris from /proc/[pid/psinfo

solaris_getprocs.c

### NOTE: Partially generated by ChatGTPo ###

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <procfs.h>
#include <dirent.h>
#include <string.h>

#define PROC_DIRECTORY "/proc"

int main() {
    DIR *procdir;
    struct dirent *entry;
    char path[256];
    psinfo_t psinfo;

    procdir = opendir(PROC_DIRECTORY);
    if (procdir == NULL) {
        perror("Error opening /proc directory");
        exit(1);
    }

    printf("PID\tCOMMAND\nARGV\n");

    while ((entry = readdir(procdir)) != NULL) {
        if (entry->d_name[0] >= '0' && entry->d_name[0] <= '9') {
            snprintf(path, sizeof(path), "%s/%s/psinfo", PROC_DIRECTORY, entry->d_name);

            int fd = open(path, O_RDONLY);
            if (fd != -1) {
                if (read(fd, &psinfo, sizeof(psinfo)) == sizeof(psinfo)) {
                    printf("%d\t%s\t%s\n", psinfo.pr_pid, psinfo.pr_fname, psinfo.pr_psargs);
                }
                close(fd);
            }
        }
    }

    closedir(procdir);
    return 0;
}