write_sysfs...g_and_verify(9)

💖 write_sysfs_string_and_verify — a Kernel API Manual moment 💖

okay so bestie, we're in the Kernel API Manual today and this one is a little cutie from the IIO tooling corner of the kernel 🦋 she writes a string to sysfs, reads it right back, and verifies it actually stuck. lowkey iconic behavior, no cap ✨

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🌸 NAME 🌸

write_sysfs_string_and_verify — string write, readback and verify. that's it, that's the whole vibe 💅

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✨ SYNOPSIS ✨

int write_sysfs_string_and_verify (const char *filename , const char
*basedir , const char *val );

literally the whole signature, keep it exactly like that, don't come for me 🫶

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🎀 ARGUMENTS 🎀

• filename — the name of the file you're writing to, bestie. just the name, okurrr 💖
• basedir — the sysfs directory where that file is gonna be found 🔍 she's the location, the setting, the main character energy
• val — the string you're actually writing. the payload. the moment. the whole point 🌈

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💜 DESCRIPTION 💜

so here's the tea ☕ — this function returns a value >= 0 on success, and otherwise it hands you back a negative error code. that's it. that's the contract. if it's zero or up, you ate and left no crumbs 🔥 if it's negative, something went sideways and the code is telling you so 😭

ngl, "negative error code" means you gotta check it. don't just vibe past the return value, fr fr 🙈

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👑 SEE ALSO 👑

• the kernel file ./tools/iio/iio_utils.c — that's where the family lives, iykyk 🧚
• iioutils_break_up_name(9)
• iioutils_get_type(9)
• iioutils_get_param_float(9)
• bsort_channel_array_by_index(9)
• build_channel_array(9)
• find_type_by_name(9)
• write_sysfs_int(9)
• write_sysfs_int_and_verify(9)
• write_sysfs_string(9)
• read_sysfs_posint(9)
• read_sysfs_float(9)
• read_sysfs_string(9)

like, the whole friend group 💕 go say hi to all of them, they're all (9) section and they're all slay ⭐

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and that's a wrap, bestie!! this page came straight from ./tools/iio and it's dated October 2026 🗓️💖 go forth, write your sysfs strings, and verify them like the icon you are. periodt. 💅🎀🌸