36 lines
616 B
C
36 lines
616 B
C
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#include "file.h"
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#include <errno.h>
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#include <stddef.h>
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#include <stdio.h>
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extern int __libc_fctprintf(
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int (*out)(char character, void *arg),
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void *arg,
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const char *format,
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va_list va);
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extern int __fputc(int c, struct __opaque_file *stream);
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static inline int _out_file(char character, void *arg)
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{
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FILE *fp = arg;
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return __fputc(character, fp);
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}
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int vfprintf(FILE *fp, const char *format, va_list arg)
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{
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__libc_file_lock(fp);
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int ret = __libc_fctprintf(_out_file, fp, format, arg);
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if (errno != SUCCESS) {
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ret = -1;
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}
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if (ferror(fp)) {
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ret = -1;
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}
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__libc_file_unlock(fp);
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return ret;
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}
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