127 lines
2.6 KiB
C
127 lines
2.6 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include "../proc.h"
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#include "../util.h"
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/* TODO: Unify proc{euid,uid}() into parsestatus() */
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int
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proceuid(pid_t pid, uid_t *euid)
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{
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FILE *fp;
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char buf[BUFSIZ], *p;
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char path[PATH_MAX];
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uid_t procuid, proceuid;
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snprintf(path, sizeof(path), "/proc/%d/status", pid);
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if (!(fp = fopen(path, "r")))
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eprintf("%s fopen:", path);
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while (fgets(buf, sizeof(buf), fp)) {
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if (!strncmp(buf, "Uid:", 4)) {
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p = buf + strlen("Uid:");
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sscanf(p, "%u %u", &procuid, &proceuid);
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*euid = proceuid;
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fclose(fp);
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return 0;
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}
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}
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fclose(fp);
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return -1;
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}
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int
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procuid(pid_t pid, uid_t *uid)
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{
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FILE *fp;
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char buf[BUFSIZ], *p;
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char path[PATH_MAX];
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uid_t procuid;
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snprintf(path, sizeof(path), "/proc/%d/status", pid);
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if (!(fp = fopen(path, "r")))
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eprintf("%s fopen:", path);
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while (fgets(buf, sizeof(buf), fp)) {
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if (!strncmp(buf, "Uid:", 4)) {
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p = buf + strlen("Uid:");
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sscanf(p, "%u", &procuid);
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*uid = procuid;
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fclose(fp);
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return 0;
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}
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}
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fclose(fp);
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return -1;
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}
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int
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parsecmdline(pid_t pid, char *buf, size_t siz)
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{
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int fd;
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char path[PATH_MAX];
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ssize_t n, i;
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snprintf(path, sizeof(path), "/proc/%d/cmdline", pid);
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fd = open(path, O_RDONLY);
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if (fd < 0)
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eprintf("open %s:", path);
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n = read(fd, buf, siz - 1);
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if (n < 0)
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eprintf("read %s:", path);
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if (!n) {
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close(fd);
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return -1;
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}
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buf[n] = '\0';
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for (i = 0; i < n; i++)
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if (buf[i] == '\0')
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buf[i] = ' ';
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close(fd);
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return 0;
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}
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int
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parsestat(pid_t pid, struct procstat *ps)
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{
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char path[PATH_MAX];
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FILE *fp;
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snprintf(path, sizeof(path), "/proc/%d/stat", pid);
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if (!(fp = fopen(path, "r")))
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eprintf("fopen %s:", path);
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fscanf(fp, "%d %s %c %d %d %d %d %d %u %lu %lu %lu %lu %lu %lu",
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&ps->pid, ps->comm,
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&ps->state, &ps->ppid, &ps->pgrp,
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&ps->sid, &ps->tty_nr, &ps->tpgid, &ps->flags,
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&ps->minflt, &ps->cminflt, &ps->majflt, &ps->cmajflt,
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&ps->utime, &ps->stime);
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fscanf(fp, "%ld %ld %ld %ld %ld %ld %lld %lu %ld %ld",
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&ps->cutime, &ps->cstime, &ps->priority, &ps->nice,
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&ps->num_threads, &ps->itrealvalue, &ps->starttime,
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&ps->vsize, &ps->rss, &ps->rsslim);
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/* Filter out '(' and ')' from comm */
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ps->comm[strlen(ps->comm) - 1] = '\0';
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memmove(ps->comm, ps->comm + 1, strlen(ps->comm));
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fclose(fp);
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return 0;
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}
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int
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validps(const char *path)
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{
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char *end;
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errno = 0;
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strtol(path, &end, 10);
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if (*end != '\0')
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return 0;
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if (errno != 0)
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return 0;
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return 1;
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}
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