31 lines
549 B
C
31 lines
549 B
C
#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include "stdio_impl.h"
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void perror(const char *msg)
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{
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FILE *f = stderr;
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char *errstr = strerror(errno);
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FLOCK(f);
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/* Save stderr's orientation and encoding rule, since perror is not
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* permitted to change them. */
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void *old_locale = f->locale;
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int old_mode = f->mode;
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if (msg && *msg) {
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fwrite(msg, strlen(msg), 1, f);
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fputc(':', f);
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fputc(' ', f);
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}
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fwrite(errstr, strlen(errstr), 1, f);
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fputc('\n', f);
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f->mode = old_mode;
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f->locale = old_locale;
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FUNLOCK(f);
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}
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