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authorbigbiff bigbiff <bigbiff@teamw.in>2013-02-23 02:55:50 +0100
committerbigbiff bigbiff <bigbiff@teamw.in>2013-02-25 15:06:46 +0100
commite60683a0d553b6488c564863f4e48954944fb0f8 (patch)
tree9364f97cb88b7c1359f5f06dfb32150a78168c31 /libblkid/carefulputc.h
parentFix building of updater for 4.2 environment (diff)
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Diffstat (limited to '')
-rw-r--r--libblkid/carefulputc.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/libblkid/carefulputc.h b/libblkid/carefulputc.h
new file mode 100644
index 000000000..2d857ebb0
--- /dev/null
+++ b/libblkid/carefulputc.h
@@ -0,0 +1,29 @@
+#ifndef _CAREFUULPUTC_H
+#define _CAREFUULPUTC_H
+
+/* putc() for use in write and wall (that sometimes are sgid tty) */
+/* Avoid control characters in our locale, and also ASCII control characters.
+ Note that the locale of the recipient is unknown. */
+#include <stdio.h>
+#include <ctype.h>
+
+#define iso8859x_iscntrl(c) \
+ (((c) & 0x7f) < 0x20 || (c) == 0x7f)
+
+static inline int carefulputc(int c, FILE *fp) {
+ int ret;
+
+ if (c == '\007' || c == '\t' || c == '\r' || c == '\n' ||
+ (!iso8859x_iscntrl(c) && (isprint(c) || isspace(c))))
+ ret = putc(c, fp);
+ else if ((c & 0x80) || !isprint(c^0x40))
+ ret = fprintf(fp, "\\%3o", (unsigned char) c);
+ else {
+ ret = putc('^', fp);
+ if (ret != EOF)
+ ret = putc(c^0x40, fp);
+ }
+ return (ret < 0) ? EOF : 0;
+}
+
+#endif /* _CAREFUULPUTC_H */