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