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4494c656e2
The "read_or_die()" function would silently NOT die for a partial read, and since it was of type "void" it obviously couldn't even return the partial number of bytes read. IOW, it was totally broken. This hopefully fixes it up. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
85 lines
1.5 KiB
C
85 lines
1.5 KiB
C
#include "cache.h"
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int read_in_full(int fd, void *buf, size_t count)
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{
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char *p = buf;
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ssize_t total = 0;
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while (count > 0) {
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ssize_t loaded = xread(fd, p, count);
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if (loaded <= 0)
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return total ? total : loaded;
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count -= loaded;
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p += loaded;
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total += loaded;
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}
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return total;
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}
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void read_or_die(int fd, void *buf, size_t count)
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{
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ssize_t loaded;
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loaded = read_in_full(fd, buf, count);
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if (loaded != count) {
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if (loaded < 0)
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die("read error (%s)", strerror(errno));
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die("read error: end of file");
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}
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}
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int write_in_full(int fd, const void *buf, size_t count)
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{
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const char *p = buf;
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ssize_t total = 0;
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while (count > 0) {
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size_t written = xwrite(fd, p, count);
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if (written < 0)
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return -1;
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if (!written) {
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errno = ENOSPC;
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return -1;
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}
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count -= written;
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p += written;
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total += written;
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}
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return total;
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}
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void write_or_die(int fd, const void *buf, size_t count)
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{
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if (write_in_full(fd, buf, count) < 0) {
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if (errno == EPIPE)
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exit(0);
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die("write error (%s)", strerror(errno));
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}
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}
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int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg)
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{
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if (write_in_full(fd, buf, count) < 0) {
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if (errno == EPIPE)
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exit(0);
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fprintf(stderr, "%s: write error (%s)\n",
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msg, strerror(errno));
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return 0;
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}
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return 1;
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}
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int write_or_whine(int fd, const void *buf, size_t count, const char *msg)
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{
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if (write_in_full(fd, buf, count) < 0) {
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fprintf(stderr, "%s: write error (%s)\n",
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msg, strerror(errno));
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return 0;
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}
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return 1;
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}
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