| -rw-r--r-- | shared.c | 71 |
1 files changed, 71 insertions, 0 deletions
@@ -330,96 +330,167 @@ void cgit_diff_commit(struct commit *commit, filepair_fn fn) unsigned char *old_sha1 = NULL; if (commit->parents) old_sha1 = commit->parents->item->object.sha1; cgit_diff_tree(old_sha1, commit->object.sha1, fn, NULL); } int cgit_parse_snapshots_mask(const char *str) { const struct cgit_snapshot_format *f; static const char *delim = " \t,:/|;"; int tl, sl, rv = 0; /* favor legacy setting */ if(atoi(str)) return 1; for(;;) { str += strspn(str,delim); tl = strcspn(str,delim); if (!tl) break; for (f = cgit_snapshot_formats; f->suffix; f++) { sl = strlen(f->suffix); if((tl == sl && !strncmp(f->suffix, str, tl)) || (tl == sl-1 && !strncmp(f->suffix+1, str, tl-1))) { rv |= f->bit; break; } } str += tl; } return rv; } int cgit_open_filter(struct cgit_filter *filter) { filter->old_stdout = chk_positive(dup(STDOUT_FILENO), "Unable to duplicate STDOUT"); chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess"); filter->pid = chk_non_negative(fork(), "Unable to create subprocess"); if (filter->pid == 0) { close(filter->pipe_fh[1]); chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO), "Unable to use pipe as STDIN"); execvp(filter->cmd, filter->argv); die("Unable to exec subprocess %s: %s (%d)", filter->cmd, strerror(errno), errno); } close(filter->pipe_fh[0]); chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO), "Unable to use pipe as STDOUT"); close(filter->pipe_fh[1]); return 0; } int cgit_close_filter(struct cgit_filter *filter) { chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO), "Unable to restore STDOUT"); close(filter->old_stdout); if (filter->pid < 0) return 0; waitpid(filter->pid, &filter->exitstatus, 0); if (WIFEXITED(filter->exitstatus) && !WEXITSTATUS(filter->exitstatus)) return 0; die("Subprocess %s exited abnormally", filter->cmd); } /* Read the content of the specified file into a newly allocated buffer, * zeroterminate the buffer and return 0 on success, errno otherwise. */ int readfile(const char *path, char **buf, size_t *size) { int fd, e; struct stat st; fd = open(path, O_RDONLY); if (fd == -1) return errno; if (fstat(fd, &st)) { e = errno; close(fd); return e; } if (!S_ISREG(st.st_mode)) { close(fd); return EISDIR; } *buf = xmalloc(st.st_size + 1); *size = read_in_full(fd, *buf, st.st_size); e = errno; (*buf)[*size] = '\0'; close(fd); return (*size == st.st_size ? 0 : e); } + +int is_token_char(char c) +{ + return isalnum(c) || c == '_'; +} + +/* Replace name with getenv(name), return pointer to zero-terminating char + */ +char *expand_macro(char *name, int maxlength) +{ + char *value; + int len; + + len = 0; + value = getenv(name); + if (value) { + len = strlen(value); + if (len > maxlength) + len = maxlength; + strncpy(name, value, len); + } + return name + len; +} + +#define EXPBUFSIZE (1024 * 8) + +/* Replace all tokens prefixed by '$' in the specified text with the + * value of the named environment variable. + * NB: the return value is a static buffer, i.e. it must be strdup'd + * by the caller. + */ +char *expand_macros(const char *txt) +{ + static char result[EXPBUFSIZE]; + char *p, *start; + int len; + + p = result; + start = NULL; + while (p < result + EXPBUFSIZE - 1 && txt && *txt) { + *p = *txt; + if (start) { + if (!is_token_char(*txt)) { + if (p - start > 0) { + *p = '\0'; + len = result + EXPBUFSIZE - start - 1; + p = expand_macro(start, len) - 1; + } + start = NULL; + txt--; + } + p++; + txt++; + continue; + } + if (*txt == '$') { + start = p; + txt++; + continue; + } + p++; + txt++; + } + *p = '\0'; + if (start && p - start > 0) { + len = result + EXPBUFSIZE - start - 1; + p = expand_macro(start, len); + *p = '\0'; + } + return result; +} |