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74d471d4e4
This gives us a slew of -Wextra fixes (not all of them though!) but we're actually doing it for the monotonic version of timers. This breaks some stuff, so we fix that up next. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
62 lines
1.4 KiB
Plaintext
62 lines
1.4 KiB
Plaintext
#include "config.h"
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#include <stdio.h>
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#include <string.h>
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/**
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* noerr - routines for cleaning up without blatting errno
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*
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* It is a good idea to follow the standard C convention of setting errno in
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* your own helper functions. Unfortunately, care must be taken in the error
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* paths as most standard functions can (and do) overwrite errno, even if they
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* succeed.
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*
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* Example:
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* #include <sys/types.h>
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* #include <sys/stat.h>
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* #include <fcntl.h>
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* #include <stdbool.h>
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* #include <string.h>
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* #include <errno.h>
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* #include <ccan/noerr/noerr.h>
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*
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* static bool write_string_to_file(const char *file, const char *string)
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* {
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* int ret, fd = open(file, O_WRONLY|O_CREAT|O_EXCL, 0600);
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* if (fd < 0)
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* return false;
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* ret = write(fd, string, strlen(string));
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* if (ret < 0) {
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* // Preserve errno from write above.
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* close_noerr(fd);
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* unlink_noerr(file);
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* return false;
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* }
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* if (close(fd) != 0) {
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* // Again, preserve errno.
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* unlink_noerr(file);
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* return false;
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* }
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* // A short write means out of space.
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* if (ret < (int)strlen(string)) {
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* unlink(file);
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* errno = ENOSPC;
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* return false;
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* }
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* return true;
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* }
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*
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* License: CC0 (Public domain)
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* Author: Rusty Russell <rusty@rustcorp.com.au>
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*/
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int main(int argc, char *argv[])
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{
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if (argc != 2)
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return 1;
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if (strcmp(argv[1], "depends") == 0)
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/* Nothing. */
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return 0;
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return 1;
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}
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