| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #include <errno.h> | ||
| 2 | #include <stdarg.h> | ||
| 3 | #include <stdio.h> | ||
| 4 | #include <string.h> | ||
| 5 | #include "error.h" | ||
| 6 | #include "command/run.h" | ||
| 7 | #include "config.h" | ||
| 8 | #include "util/log.h" | ||
| 9 | #include "util/xstdio.h" | ||
| 10 | |||
| 11 | typedef struct { | ||
| 12 | char buf[512]; | ||
| 13 | unsigned int nr_errors; | ||
| 14 | bool is_error; | ||
| 15 | bool print_to_stderr; | ||
| 16 | } ErrorBuffer; | ||
| 17 | |||
| 18 | // This is not accessed from signal handlers or multiple threads and | ||
| 19 | // is considered an acceptable use of non-const globals: | ||
| 20 | // NOLINTNEXTLINE(*-avoid-non-const-global-variables) | ||
| 21 | static ErrorBuffer err; | ||
| 22 | |||
| 23 | 95 | void clear_error(void) | |
| 24 | { | ||
| 25 | 95 | err.buf[0] = '\0'; | |
| 26 | 95 | } | |
| 27 | |||
| 28 | 114 | bool error_msg(const char *format, ...) | |
| 29 | { | ||
| 30 |
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114 | const char *cmd = current_command ? current_command->name : NULL; |
| 31 | 114 | const char *file = current_config.file; | |
| 32 | 114 | const unsigned int line = current_config.line; | |
| 33 | 114 | const size_t size = sizeof(err.buf); | |
| 34 | 114 | int pos = 0; | |
| 35 | |||
| 36 |
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114 | if (file && cmd) { |
| 37 | ✗ | pos = snprintf(err.buf, size, "%s:%u: %s: ", file, line, cmd); | |
| 38 |
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114 | } else if (file) { |
| 39 | 1 | pos = snprintf(err.buf, size, "%s:%u: ", file, line); | |
| 40 |
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113 | } else if (cmd) { |
| 41 | 101 | pos = snprintf(err.buf, size, "%s: ", cmd); | |
| 42 | } | ||
| 43 | |||
| 44 |
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102 | if (unlikely(pos < 0)) { |
| 45 | // Note: POSIX snprintf(3) *does* set errno on failure (unlike ISO C) | ||
| 46 | ✗ | LOG_ERRNO("snprintf"); | |
| 47 | ✗ | pos = 0; | |
| 48 | } | ||
| 49 | |||
| 50 |
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114 | if (likely(pos < (size - 3))) { |
| 51 | 114 | va_list ap; | |
| 52 | 114 | va_start(ap, format); | |
| 53 | 114 | vsnprintf(err.buf + pos, size - pos, format, ap); | |
| 54 | 114 | va_end(ap); | |
| 55 | } else { | ||
| 56 | ✗ | LOG_WARNING("no buffer space left for error message"); | |
| 57 | } | ||
| 58 | |||
| 59 | 114 | err.is_error = true; | |
| 60 | 114 | err.nr_errors++; | |
| 61 | |||
| 62 |
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114 | if (err.print_to_stderr) { |
| 63 | 4 | xfputs(err.buf, stderr); | |
| 64 | 4 | xfputc('\n', stderr); | |
| 65 | } | ||
| 66 | |||
| 67 | 114 | LOG_INFO("%s", err.buf); | |
| 68 | |||
| 69 | // Always return false, to allow tail-calling as `return error_msg(...);` | ||
| 70 | // from command handlers, instead of `error_msg(...); return false;` | ||
| 71 | 114 | return false; | |
| 72 | } | ||
| 73 | |||
| 74 | 1 | bool error_msg_errno(const char *prefix) | |
| 75 | { | ||
| 76 | 1 | return error_msg("%s: %s", prefix, strerror(errno)); | |
| 77 | } | ||
| 78 | |||
| 79 | 11 | bool info_msg(const char *format, ...) | |
| 80 | { | ||
| 81 | 11 | va_list ap; | |
| 82 | 11 | va_start(ap, format); | |
| 83 | 11 | vsnprintf(err.buf, sizeof(err.buf), format, ap); | |
| 84 | 11 | va_end(ap); | |
| 85 | 11 | err.is_error = false; | |
| 86 | 11 | return true; // To allow tail-calling from command handlers | |
| 87 | } | ||
| 88 | |||
| 89 | 95 | const char *get_msg(bool *is_error) | |
| 90 | { | ||
| 91 | 95 | *is_error = err.is_error; | |
| 92 | 95 | return err.buf; | |
| 93 | } | ||
| 94 | |||
| 95 | 362 | unsigned int get_nr_errors(void) | |
| 96 | { | ||
| 97 | 362 | return err.nr_errors; | |
| 98 | } | ||
| 99 | |||
| 100 | 24 | void errors_to_stderr(bool enable) | |
| 101 | { | ||
| 102 | 24 | err.print_to_stderr = enable; | |
| 103 | 24 | } | |
| 104 |