Q_SYNC(2const)

💖 Q_SYNC — synchronize on-disk copy of quota usages 💖

okay bestie, so this is a <pink>Q_SYNC</pink> page from the <cyan>2const</cyan> section of the Linux man-pages, and it's literally just one little constant that lives inside quotactl(2) and quotactl_fd(2). no cap. it's giving "small but mighty" ✨

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🎀 LIBRARY

Standard C library (libc, -lc) 🫶

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✨ SYNOPSIS

#include <sys/quota.h>

int quotactl(QCMD(Q_SYNC, type), const char *_Nullable special, 0, NULL);

and also, if you're the type of girl who goes straight to the raw syscall 😌:

#include <sys/quota.h>    /* Definition of Q_* constants */
#include <sys/syscall.h>  /* Definition of SYS_* constants */
#include <unistd.h>

int syscall(SYS_quotactl_fd, int fd, QCMD(Q_SYNC, type));

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🌸 DESCRIPTION

So what does it actually do, you ask? it updates the on-disk copy of quota usages for a filesystem. that's it. that's the whole vibe. 💅

for quotactl(2), if special is NULL, then all filesystems with active quotas get synchronized — like, the whole group chat gets the message at once, periodt. but quotactl_fd(2) always synchronizes only one filesystem, no matter what. main character energy: one fd, one filesystem. 🙈

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🦋 RETURN VALUE

See quotactl(2). ✨

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💀 ERRORS

See quotactl(2). 😭

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🌈 STANDARDS

Linux. 🐧

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💜 HISTORY

Linux. ⭐

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👑 SEE ALSO

• quotactl(2)
• quotactl_fd(2)

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okay that's the whole page, bestie, you ate it 🍓 this was pulled from <purple>Linux man-pages 6.20</purple>, dated <lavender>2026-06-05</lavender> — and it's <rainbow>Q_SYNC(2const)</rainbow>, so you know exactly where to find it again iykyk 🧚💖