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Linux: document /proc/PID/stat field parsing
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@ -291,11 +291,13 @@ static bool LinuxProcessList_readStatFile(Process* process, openat_arg_t procFd,
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if (r < 0)
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return false;
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/* (1) pid - %d */
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assert(process->pid == atoi(buf));
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char* location = strchr(buf, ' ');
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if (!location)
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return false;
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/* (2) comm - (%s) */
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location += 2;
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char* end = strrchr(location, ')');
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if (!end)
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@ -305,61 +307,100 @@ static bool LinuxProcessList_readStatFile(Process* process, openat_arg_t procFd,
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location = end + 2;
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/* (3) state - %c */
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process->state = location[0];
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location += 2;
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/* (4) ppid - %d */
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process->ppid = strtol(location, &location, 10);
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location += 1;
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/* (5) pgrp - %d */
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process->pgrp = strtoul(location, &location, 10);
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location += 1;
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/* (6) session - %d */
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process->session = strtoul(location, &location, 10);
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location += 1;
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/* (7) tty_nr - %d */
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process->tty_nr = strtoul(location, &location, 10);
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location += 1;
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/* (8) tpgid - %d */
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process->tpgid = strtol(location, &location, 10);
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location += 1;
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/* Skip flags */
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/* Skip (9) flags - %u */
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location = strchr(location, ' ') + 1;
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/* (10) minflt - %lu */
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process->minflt = strtoull(location, &location, 10);
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location += 1;
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/* (11) cminflt - %lu */
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lp->cminflt = strtoull(location, &location, 10);
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location += 1;
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/* (12) majflt - %lu */
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process->majflt = strtoull(location, &location, 10);
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location += 1;
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/* (13) cmajflt - %lu */
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lp->cmajflt = strtoull(location, &location, 10);
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location += 1;
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/* (14) utime - %lu */
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lp->utime = LinuxProcessList_adjustTime(strtoull(location, &location, 10));
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location += 1;
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/* (15) stime - %lu */
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lp->stime = LinuxProcessList_adjustTime(strtoull(location, &location, 10));
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location += 1;
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/* (16) cutime - %ld */
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lp->cutime = LinuxProcessList_adjustTime(strtoull(location, &location, 10));
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location += 1;
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/* (17) cstime - %ld */
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lp->cstime = LinuxProcessList_adjustTime(strtoull(location, &location, 10));
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location += 1;
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/* (18) priority - %ld */
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process->priority = strtol(location, &location, 10);
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location += 1;
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/* (19) nice - %ld */
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process->nice = strtol(location, &location, 10);
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location += 1;
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/* (20) num_threads - %ld */
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process->nlwp = strtol(location, &location, 10);
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location += 1;
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/* Skip (21) itrealvalue - %ld */
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location = strchr(location, ' ') + 1;
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/* (22) starttime - %llu */
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if (process->starttime_ctime == 0) {
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process->starttime_ctime = btime + LinuxProcessList_adjustTime(strtoll(location, &location, 10)) / 100;
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} else {
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location = strchr(location, ' ') + 1;
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location = strchr(location, ' ');
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}
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location += 1;
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for (int i = 0; i < 15; i++) {
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/* Skip (23) - (38) */
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for (int i = 0; i < 16; i++) {
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location = strchr(location, ' ') + 1;
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}
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/* Skip exit_signal */
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location = strchr(location, ' ') + 1;
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assert(location != NULL);
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/* (39) processor - %d */
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process->processor = strtol(location, &location, 10);
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/* Ignore further fields */
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process->time = lp->utime + lp->stime;
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return true;
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