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author | Jim Meyering <jim@meyering.net> | 1993-12-29 06:13:37 +0000 |
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committer | Jim Meyering <jim@meyering.net> | 1993-12-29 06:13:37 +0000 |
commit | 811a26c818092d4888dafb6f07967b341ae7b8d6 (patch) | |
tree | e322d622e7b615d08e87337781118ac87733c2ef /lib/safe-read.c | |
parent | 94c2b3081afc60341285f21eeaa07f4e20ed37af (diff) | |
download | gnulib-811a26c818092d4888dafb6f07967b341ae7b8d6.tar.gz |
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Diffstat (limited to 'lib/safe-read.c')
-rw-r--r-- | lib/safe-read.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/lib/safe-read.c b/lib/safe-read.c new file mode 100644 index 0000000000..d915d4e7cc --- /dev/null +++ b/lib/safe-read.c @@ -0,0 +1,31 @@ +/* Read LEN bytes at PTR from descriptor DESC, retrying if necessary. + Return the actual number of bytes read, zero for EOF, or negative + for an error. */ + +int +safe_read (desc, ptr, len) + int desc; + char *ptr; + int len; +{ + int n_remaining; + + n_remaining = len; + while (n_remaining > 0) + { + int n_chars = read (desc, ptr, n_remaining); + if (n_chars < 0) + { +#ifdef EINTR + if (errno == EINTR) + continue; +#endif + return n_chars; + } + if (n_chars == 0) + break; + ptr += n_chars; + n_remaining -= n_chars; + } + return len - n_remaining; +} |