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842093bb84
Stop trying to maintain a per-file _POSIX_C_SOURCE. Instead, require POSIX.1-2008 globally. A lot of core source files depend on that already. Some care must be taken on a few select files where we need a bit more than POSIX. Some files need XSI extensions (_XOPEN_SOURCE) and some files need BSD extensions (_DEFAULT_SOURCE). In both cases, these feature test macros imply _POSIX_C_SOURCE. Make sure to not define both these macros and _POSIX_C_SOURCE explicitly to avoid POSIX requirement conflicts (e.g. _POSIX_C_SOURCE says POSIX.1-2001 but _XOPEN_SOURCE says POSIX.1-2008). Additionally, there is one special case in render/vulkan/vulkan.c. That file needs major()/minor(), and these are system-specific. On FreeBSD, _POSIX_C_SOURCE hides system-specific symbols so we need to make sure it's not defined for this file. On Linux, we can explicitly include <sys/sysmacros.h> and ensure that apart from symbols defined there the file only uses POSIX toys.
39 lines
945 B
C
39 lines
945 B
C
#include "util/token.h"
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#include "wlr/util/log.h"
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#include <fcntl.h>
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#include <inttypes.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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bool generate_token(char out[static TOKEN_SIZE]) {
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static FILE *urandom = NULL;
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uint64_t data[2];
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if (!urandom) {
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int fd = open("/dev/urandom", O_RDONLY | O_CLOEXEC);
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if (fd < 0) {
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wlr_log_errno(WLR_ERROR, "Failed to open random device");
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return false;
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}
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if (!(urandom = fdopen(fd, "r"))) {
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wlr_log_errno(WLR_ERROR, "fdopen failed");
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close(fd);
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return false;
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}
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}
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if (fread(data, sizeof(data), 1, urandom) != 1) {
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wlr_log_errno(WLR_ERROR, "Failed to read from random device");
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return false;
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}
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if (snprintf(out, TOKEN_SIZE, "%016" PRIx64 "%016" PRIx64, data[0], data[1]) != TOKEN_SIZE - 1) {
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wlr_log_errno(WLR_ERROR, "Failed to format hex string token");
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return false;
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}
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return true;
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}
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