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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 | 8067b6fb73fadebad4671a096b9b07c8dae9c3f8 (patch) | |
tree | c65878804fa78165b67328f88f73716c8495d242 /lib/safe-read.c | |
parent | 9a30fc037ef27fe8401af33aaed39e725c4f1004 (diff) | |
download | coreutils-8067b6fb73fadebad4671a096b9b07c8dae9c3f8.tar.xz |
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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 000000000..d915d4e7c --- /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; +} |