diff options
Diffstat (limited to 'include/common.h')
| -rw-r--r-- | include/common.h | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/include/common.h b/include/common.h index d0c4146..4ffccea 100644 --- a/include/common.h +++ b/include/common.h @@ -19,6 +19,7 @@ #ifndef __MTD_UTILS_COMMON_H__ #define __MTD_UTILS_COMMON_H__ +#include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <ctype.h> @@ -101,9 +102,45 @@ extern "C" { fprintf(stderr, "%s: warning!: " fmt "\n", PROGRAM_NAME, ##__VA_ARGS__); \ } while(0) +/** + * prompt the user for confirmation + */ +static inline bool prompt(const char *msg, bool def) +{ + char *line = NULL; + size_t len; + bool ret = def; + + do { + normsg_cont("%s (%c/%c) ", msg, def ? 'Y' : 'y', def ? 'n' : 'N'); + fflush(stdout); + + while (getline(&line, &len, stdin) == -1) { + printf("failed to read prompt; assuming '%s'\n", + def ? "yes" : "no"); + break; + } + + if (strcmp("\n", line) != 0) { + switch (rpmatch(line)) { + case 0: ret = false; break; + case 1: ret = true; break; + case -1: + puts("unknown response; please try again"); + continue; + } + } + break; + } while (1); + + free(line); + + return ret; +} + static inline int is_power_of_2(unsigned long long n) { - return (n != 0 && ((n & (n - 1)) == 0)); + return (n != 0 && ((n & (n - 1)) == 0)); } /** |