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13 nishi 1 
/* $Id: enscript.c 65 2024-08-23 11:00:12Z nishi $ */
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#include "rv_enscript.h"
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#include "../config.h"
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#include "rv_util.h"
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#include "rv_repo.h"
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#include <string.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <sys/wait.h>
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char* rv_enscript(const char* repouser, const char* path, const char* lang) {
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	if(rv_get_filesize(repouser, path) > 1024 * 128) return NULL;
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	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
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	int spipes[2];
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	pipe(spipes);
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	pid_t pid = fork();
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	if(pid == 0) {
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		close(spipes[0]);
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		dup2(spipes[1], STDOUT_FILENO);
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		char* cmd[] = {"svnlook", "cat", svnpath, (char*)path, NULL};
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		execvp("svnlook", cmd);
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		_exit(0);
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	} else {
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		close(spipes[1]);
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		int pipes[2];
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		pipe(pipes);
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		pid_t epid = fork();
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		if(epid == 0) {
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			close(pipes[0]);
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			dup2(spipes[0], STDIN_FILENO);
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			dup2(pipes[1], STDOUT_FILENO);
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			char* hl = rv_strcat("--highlight=", lang);
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			char* cmd[] = {"enscript", "-whtml", "--color", "-p", "-", hl, NULL};
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			execvp("enscript", cmd);
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			_exit(0);
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		}
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		close(pipes[1]);
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		char cbuf[2];
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		cbuf[1] = 0;
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		char* d = malloc(1);
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		d[0] = 0;
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		while(1) {
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			int n = read(pipes[0], cbuf, 1);
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			if(n == 0) break;
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			char* tmp = d;
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			d = rv_strcat(tmp, cbuf);
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			free(tmp);
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		}
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		close(pipes[0]);
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		close(spipes[0]);
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		int status;
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		bool bad = false;
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		waitpid(pid, &status, 0);
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		if(WEXITSTATUS(status) != 0) {
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			free(d);
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			free(svnpath);
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			bad = true;
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		}
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		waitpid(epid, &status, 0);
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		if(WEXITSTATUS(status) != 0) {
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			if(!bad) {
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				free(d);
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				free(svnpath);
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				bad = true;
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			}
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		}
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		if(bad) return NULL;
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		free(svnpath);
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		if(strlen(d) == 0) {
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			free(d);
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			return NULL;
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		}
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		char* newdata = malloc(1);
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		newdata[0] = 0;
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		int i;
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		int incr = 0;
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		bool log = false;
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		for(i = 0;; i++) {
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			if(d[i] == '\n' || d[i] == 0) {
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				char oldc = d[i];
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				d[i] = 0;
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				if(strcmp(d + incr, "<PRE>") == 0) {
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					log = true;
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				} else if(strcmp(d + incr, "</PRE>") == 0) {
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					log = false;
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				} else if(log) {
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					char* tmp = newdata;
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					newdata = rv_strcat3(tmp, d + incr, "\n");
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					free(tmp);
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				}
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				incr = i + 1;
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				if(oldc == 0) break;
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			}
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		}
65 nishi 102 
		free(d);
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		return newdata;
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	}
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}