| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #include <errno.h> | ||
| 2 | #include <limits.h> | ||
| 3 | #include <stdlib.h> | ||
| 4 | #include <sys/stat.h> | ||
| 5 | #include "readfile.h" | ||
| 6 | #include "xreadwrite.h" | ||
| 7 | |||
| 8 | 208 | ssize_t read_file(const char *filename, char **bufp, size_t size_limit) | |
| 9 | { | ||
| 10 | 208 | int fd = xopen(filename, O_RDONLY | O_CLOEXEC, 0); | |
| 11 |
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208 | if (fd == -1) { |
| 12 | 81 | goto error_noclose; | |
| 13 | } | ||
| 14 | |||
| 15 | 127 | int saved_errno; | |
| 16 | 127 | struct stat st; | |
| 17 |
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127 | if (unlikely(fstat(fd, &st) == -1)) { |
| 18 | ✗ | goto error; | |
| 19 | } | ||
| 20 |
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127 | if (unlikely(S_ISDIR(st.st_mode))) { |
| 21 | 1 | errno = EISDIR; | |
| 22 | 1 | goto error; | |
| 23 | } | ||
| 24 | |||
| 25 | 126 | off_t size = st.st_size; | |
| 26 |
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126 | size_limit = size_limit ? MIN(size_limit, SSIZE_MAX) : SSIZE_MAX; |
| 27 |
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126 | if (unlikely(size > size_limit)) { |
| 28 | 1 | errno = EFBIG; | |
| 29 | 1 | goto error; | |
| 30 | } | ||
| 31 | |||
| 32 | 125 | char *buf = malloc(size + 1); | |
| 33 |
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125 | if (unlikely(!buf)) { |
| 34 | ✗ | goto error; | |
| 35 | } | ||
| 36 | |||
| 37 | 125 | ssize_t r = xread_all(fd, buf, size); | |
| 38 |
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125 | if (unlikely(r < 0)) { |
| 39 | ✗ | free(buf); | |
| 40 | ✗ | goto error; | |
| 41 | } | ||
| 42 | |||
| 43 | 125 | buf[r] = '\0'; | |
| 44 | 125 | *bufp = buf; | |
| 45 | 125 | xclose(fd); | |
| 46 | 125 | return r; | |
| 47 | |||
| 48 | 2 | error: | |
| 49 | 2 | saved_errno = errno; | |
| 50 | 2 | xclose(fd); | |
| 51 | 2 | errno = saved_errno; | |
| 52 | 83 | error_noclose: | |
| 53 | 83 | *bufp = NULL; | |
| 54 | 83 | return -1; | |
| 55 | } | ||
| 56 |