| /* pending.c - reusable stuff awaiting review |
| * |
| * new lib entries for stuff in toys/pending |
| */ |
| |
| #include "toys.h" |
| |
| // Execute a callback for each PID that matches a process name from a list. |
| void names_to_pid(char **names, int (*callback)(pid_t pid, char *name)) |
| { |
| DIR *dp; |
| struct dirent *entry; |
| |
| if (!(dp = opendir("/proc"))) perror_exit("opendir"); |
| |
| while ((entry = readdir(dp))) { |
| unsigned u; |
| char *cmd, **curname; |
| |
| if (!(u = atoi(entry->d_name))) continue; |
| sprintf(libbuf, "/proc/%u/cmdline", u); |
| if (!(cmd = readfile(libbuf, libbuf, sizeof(libbuf)))) continue; |
| |
| for (curname = names; *curname; curname++) |
| if (**curname == '/' ? !strcmp(cmd, *curname) |
| : !strcmp(basename(cmd), basename(*curname))) |
| if (callback(u, *curname)) break; |
| if (*curname) break; |
| } |
| closedir(dp); |
| } |
| |
| /* |
| * used to get the interger value. |
| */ |
| unsigned long get_int_value(const char *numstr, unsigned long lowrange, unsigned long highrange) |
| { |
| unsigned long rvalue = 0; |
| char *ptr; |
| |
| if (!isdigit(*numstr)) perror_exit("bad number '%s'", numstr); |
| errno = 0; |
| rvalue = strtoul(numstr, &ptr, 10); |
| |
| if (errno || numstr == ptr || *ptr || rvalue < lowrange || rvalue > highrange) |
| perror_exit("bad number '%s'", numstr); |
| |
| return rvalue; |
| } |
| |
| void daemonize(void) |
| { |
| int fd = open("/dev/null", O_RDWR); |
| if (fd < 0) fd = xcreate("/", O_RDONLY, 0666); |
| |
| pid_t pid = fork(); |
| if (pid < 0) perror_exit("DAEMON: failed to fork"); |
| if (pid) exit(EXIT_SUCCESS); |
| |
| setsid(); |
| dup2(fd, 0); |
| dup2(fd, 1); |
| dup2(fd, 2); |
| if (fd > 2) close(fd); |
| } |
| |
| char *human_readable(unsigned long long size) |
| { |
| static char buf[32]; |
| char *tmp = (buf+4); //unsigned long long can come in 20byte string. |
| int index, sz; |
| |
| for (index = 0; 1024 < size>>(10*index); index++); |
| sz = size>>(10*index); |
| if (sz < 10 && index) { |
| sprintf(tmp, "%llu", size>>(10*(index-1))); |
| sprintf(buf, "%c.%c", tmp[0], tmp[1]); |
| } else sprintf(buf, "%u", sz); |
| sprintf(buf, "%s%c", buf, " KMGTPE"[index]); |
| return buf; |
| } |