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Add a safe wrapper for write and fix some warnings

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1. Add a function writeall and make swrite wrap that function. Use either writeall or swrite, depending on whether we want to exit on errors or not.
2. Fix warnings when compiling with a higher optimisation level.
(CFLAGS ?= -pipe -O3 -march=native -mtune=native -freorder-blocks-and-partition)

Signed-off-by: hwangcc <hwangcc@csie.nctu.edu.tw>
This commit is contained in:
hwangcc
2015-03-24 20:57:06 +08:00
parent 822cd3bf1b
commit 42515308e7
12 changed files with 90 additions and 80 deletions
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11
i3-dump-log/main.c
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@ -43,8 +43,7 @@ static int check_for_wrap(void) {
* of the log. */
wrap_count = header->wrap_count;
const int len = (logbuffer + header->offset_last_wrap) - walk;
if (write(STDOUT_FILENO, walk, len) != len)
err(EXIT_FAILURE, "write()");
swrite(STDOUT_FILENO, walk, len);
walk = logbuffer + sizeof(i3_shmlog_header);
return 1;
}
@ -52,12 +51,8 @@ static int check_for_wrap(void) {
static void print_till_end(void) {
check_for_wrap();
const int len = (logbuffer + header->offset_next_write) - walk;
const int n = write(STDOUT_FILENO, walk, len);
if (len != n)
err(EXIT_FAILURE, "write()");
if (n > 0) {
walk += n;
}
swrite(STDOUT_FILENO, walk, len);
walk += len;
}
int main(int argc, char *argv[]) {