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tools/nolibc: Add fseek() to stdio.h

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A very basic wrapper around lseek() that implements fseek().

Signed-off-by: Daniel Palmer <daniel@thingy.jp>
Link: https://patch.msgid.link/20260105023629.1502801-3-daniel@thingy.jp
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This commit is contained in:
Daniel Palmer 2026-01-05 11:36:28 +09:00 • committed by Thomas Weißschuh
parent edaf307431
commit 109770cc81
1 changed files with 19 additions and 0 deletions
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19
tools/include/nolibc/stdio.h
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@ -272,6 +272,25 @@ char *fgets(char *s, int size, FILE *stream)
}
/* fseek */
static __attribute__((unused))
int fseek(FILE *stream, long offset, int whence)
{
int fd = fileno(stream);
off_t ret;
ret = lseek(fd, offset, whence);
/* lseek() and fseek() differ in that lseek returns the new
* position or -1, fseek() returns either 0 or -1.
*/
if (ret >= 0)
return 0;
return -1;
}
/* minimal printf(). It supports the following formats:
* - %[l*]{d,u,c,x,p}
* - %s