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author | Karel Zak | 2006-12-07 00:26:54 +0100 |
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committer | Karel Zak | 2006-12-07 00:26:54 +0100 |
commit | 48d7b13a1eab85fab91c8d6c5ddf298f733c74f5 (patch) | |
tree | 8813d36590ee3361bd75f57a12fd2032e9296ddb /include/carefulputc.h | |
parent | Imported from util-linux-2.12r tarball. (diff) | |
download | kernel-qcow2-util-linux-48d7b13a1eab85fab91c8d6c5ddf298f733c74f5.tar.gz kernel-qcow2-util-linux-48d7b13a1eab85fab91c8d6c5ddf298f733c74f5.tar.xz kernel-qcow2-util-linux-48d7b13a1eab85fab91c8d6c5ddf298f733c74f5.zip |
Imported from util-linux-2.13-pre1 tarball.
Diffstat (limited to 'include/carefulputc.h')
-rw-r--r-- | include/carefulputc.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/carefulputc.h b/include/carefulputc.h new file mode 100644 index 000000000..2d857ebb0 --- /dev/null +++ b/include/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 */ |