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Add read_pipe_all()

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Add a convenience function to read from a pipe until all requested data
has been read.
This commit is contained in:
Romain Vimont 2021-10-17 16:20:46 +02:00
parent c53c466484
commit fdea75a555
2 changed files with 18 additions and 0 deletions
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15
app/src/util/process.c
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@ -19,3 +19,18 @@ process_check_success(process_t proc, const char *name, bool close) {
}
return true;
}
ssize_t
read_pipe_all(pipe_t pipe, char *data, size_t len) {
size_t copied = 0;
while (len > 0) {
ssize_t r = read_pipe(pipe, data, len);
if (r <= 0) {
return copied ? (ssize_t) copied : r;
}
len -= r;
data += r;
copied += r;
}
return copied;
}

3
app/src/util/process.h
View file

@ -91,6 +91,9 @@ is_regular_file(const char *path);
ssize_t
read_pipe(pipe_t pipe, char *data, size_t len);
ssize_t
read_pipe_all(pipe_t pipe, char *data, size_t len);
void
close_pipe(pipe_t pipe);