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Fix issues with path reading from pipes (don't UTF8 validate chunks,

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because they can be fragments) and some misc buffering issues.
This commit is contained in:
Bruce Hill 2024-09-09 15:28:03 -04:00
parent cc94afcc56
commit 02eefdd52c
1 changed files with 25 additions and 13 deletions
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38
builtins/path.c
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@ -8,6 +8,7 @@
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <unistr.h>
#include "array.h"
@ -257,24 +258,35 @@ public Text_t Path$read(Path_t path)
close(fd);
return Text$from_strn(gc_mem, (size_t)sb.st_size);
} else {
const size_t chunk_size = 256;
char *buf = GC_MALLOC_ATOMIC(chunk_size);
Text_t contents = Text("");
ssize_t just_read;
do {
just_read = read(fd, buf, chunk_size);
size_t capacity = 256, len = 0;
char *content = GC_MALLOC_ATOMIC(capacity);
for (;;) {
char chunk[256];
ssize_t just_read = read(fd, chunk, sizeof(chunk));
if (just_read < 0)
fail("Failed while reading file: %k (%s)", &path, strerror(errno));
else if (just_read == 0)
else if (just_read == 0) {
if (errno == EAGAIN || errno == EINTR)
continue;
break;
}
if (u8_check((uint8_t*)buf, (size_t)just_read) != NULL)
fail("File does not contain valid UTF8 data!");
contents = Texts(contents, Text$from_strn(buf, (size_t)just_read));
buf = GC_MALLOC_ATOMIC(chunk_size);
} while (just_read > 0);
if (len + (size_t)just_read >= capacity) {
content = GC_REALLOC(content, (capacity *= 2));
}
memcpy(&content[len], chunk, (size_t)just_read);
len += (size_t)just_read;
if ((size_t)just_read < sizeof(chunk))
break;
}
close(fd);
return contents;
if (u8_check((uint8_t*)content, len) != NULL)
fail("File does not contain valid UTF8 data!");
return Text$from_strn(content, len);
}
}