| 1 | #include <unistd.h> |
| 2 | #include <fcntl.h> |
| 3 | #include <string.h> |
| 4 | #include <stdarg.h> |
| 5 | #include <syslog.h> |
| 6 | |
| 7 | #include "fio.h" |
| 8 | |
| 9 | #define LOG_START_SZ 512 |
| 10 | |
| 11 | size_t log_info_buf(const char *buf, size_t len) |
| 12 | { |
| 13 | /* |
| 14 | * buf could be NULL (not just ""). |
| 15 | */ |
| 16 | if (!buf) |
| 17 | return 0; |
| 18 | |
| 19 | if (is_backend) { |
| 20 | size_t ret = fio_server_text_output(FIO_LOG_INFO, buf, len); |
| 21 | if (ret != -1) |
| 22 | return ret; |
| 23 | } |
| 24 | |
| 25 | if (log_syslog) { |
| 26 | syslog(LOG_INFO, "%s", buf); |
| 27 | return len; |
| 28 | } else |
| 29 | return fwrite(buf, len, 1, f_out); |
| 30 | } |
| 31 | |
| 32 | static size_t valist_to_buf(char **buffer, const char *fmt, va_list src_args) |
| 33 | { |
| 34 | size_t len, cur = LOG_START_SZ; |
| 35 | va_list args; |
| 36 | |
| 37 | do { |
| 38 | *buffer = calloc(1, cur); |
| 39 | if (!*buffer) |
| 40 | return 0; |
| 41 | |
| 42 | va_copy(args, src_args); |
| 43 | len = vsnprintf(*buffer, cur, fmt, args); |
| 44 | va_end(args); |
| 45 | |
| 46 | if (len < cur) |
| 47 | break; |
| 48 | |
| 49 | cur = len + 1; |
| 50 | free(*buffer); |
| 51 | } while (1); |
| 52 | |
| 53 | return len; |
| 54 | } |
| 55 | |
| 56 | /* allocate buffer, fill with prefix string followed by vararg string */ |
| 57 | static size_t prevalist_to_buf(char **buffer, const char *pre, int prelen, |
| 58 | const char *fmt, va_list src_args) |
| 59 | { |
| 60 | size_t len, cur = LOG_START_SZ; |
| 61 | va_list args; |
| 62 | |
| 63 | do { |
| 64 | *buffer = calloc(1, cur); |
| 65 | if (!*buffer) |
| 66 | return 0; |
| 67 | |
| 68 | va_copy(args, src_args); |
| 69 | memcpy(*buffer, pre, prelen); |
| 70 | len = prelen + vsnprintf(*buffer + prelen, cur - prelen, fmt, args); |
| 71 | va_end(args); |
| 72 | |
| 73 | if (len < cur) |
| 74 | break; |
| 75 | |
| 76 | cur = len + 1; |
| 77 | free(*buffer); |
| 78 | } while (1); |
| 79 | |
| 80 | return len; |
| 81 | } |
| 82 | |
| 83 | size_t log_valist(const char *fmt, va_list args) |
| 84 | { |
| 85 | char *buffer; |
| 86 | size_t len; |
| 87 | |
| 88 | len = valist_to_buf(&buffer, fmt, args); |
| 89 | len = log_info_buf(buffer, len); |
| 90 | free(buffer); |
| 91 | |
| 92 | return len; |
| 93 | } |
| 94 | |
| 95 | /* add prefix for the specified type in front of the valist */ |
| 96 | void log_prevalist(int type, const char *fmt, va_list args) |
| 97 | { |
| 98 | char pre[32]; |
| 99 | char *buffer; |
| 100 | size_t len; |
| 101 | int prelen; |
| 102 | pid_t pid; |
| 103 | |
| 104 | pid = gettid(); |
| 105 | if (fio_debug_jobp && *fio_debug_jobp != -1U |
| 106 | && pid != *fio_debug_jobp) |
| 107 | return; |
| 108 | |
| 109 | prelen = snprintf(pre, sizeof pre, "%-8s %-5u ", debug_levels[type].name, (int) pid); |
| 110 | if (prelen > 0) { |
| 111 | len = prevalist_to_buf(&buffer, pre, prelen, fmt, args); |
| 112 | len = log_info_buf(buffer, len); |
| 113 | free(buffer); |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | size_t log_info(const char *format, ...) |
| 118 | { |
| 119 | va_list args; |
| 120 | size_t ret; |
| 121 | |
| 122 | va_start(args, format); |
| 123 | ret = log_valist(format, args); |
| 124 | va_end(args); |
| 125 | |
| 126 | return ret; |
| 127 | } |
| 128 | |
| 129 | size_t __log_buf(struct buf_output *buf, const char *format, ...) |
| 130 | { |
| 131 | char *buffer; |
| 132 | va_list args; |
| 133 | size_t len; |
| 134 | |
| 135 | va_start(args, format); |
| 136 | len = valist_to_buf(&buffer, format, args); |
| 137 | va_end(args); |
| 138 | |
| 139 | len = buf_output_add(buf, buffer, len); |
| 140 | free(buffer); |
| 141 | |
| 142 | return len; |
| 143 | } |
| 144 | |
| 145 | int log_info_flush(void) |
| 146 | { |
| 147 | if (is_backend || log_syslog) |
| 148 | return 0; |
| 149 | |
| 150 | return fflush(f_out); |
| 151 | } |
| 152 | |
| 153 | size_t log_err(const char *format, ...) |
| 154 | { |
| 155 | size_t ret, len; |
| 156 | char *buffer; |
| 157 | va_list args; |
| 158 | |
| 159 | va_start(args, format); |
| 160 | len = valist_to_buf(&buffer, format, args); |
| 161 | va_end(args); |
| 162 | |
| 163 | if (is_backend) { |
| 164 | ret = fio_server_text_output(FIO_LOG_ERR, buffer, len); |
| 165 | if (ret != -1) |
| 166 | goto done; |
| 167 | } |
| 168 | |
| 169 | if (log_syslog) { |
| 170 | syslog(LOG_INFO, "%s", buffer); |
| 171 | ret = len; |
| 172 | } else { |
| 173 | if (f_err != stderr) |
| 174 | ret = fwrite(buffer, len, 1, stderr); |
| 175 | |
| 176 | ret = fwrite(buffer, len, 1, f_err); |
| 177 | } |
| 178 | |
| 179 | done: |
| 180 | free(buffer); |
| 181 | return ret; |
| 182 | } |
| 183 | |
| 184 | const char *log_get_level(int level) |
| 185 | { |
| 186 | static const char *levels[] = { "Unknown", "Debug", "Info", "Error", |
| 187 | "Unknown" }; |
| 188 | |
| 189 | if (level >= FIO_LOG_NR) |
| 190 | level = FIO_LOG_NR; |
| 191 | |
| 192 | return levels[level]; |
| 193 | } |