diff options
Diffstat (limited to 'mk/conv.c')
| -rw-r--r-- | mk/conv.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/mk/conv.c b/mk/conv.c new file mode 100644 index 0000000..3decbfd --- /dev/null +++ b/mk/conv.c @@ -0,0 +1,180 @@ +#include <sys/stat.h> +#include <sys/wait.h> +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +static char *argv0; + + +static int +single(int argc, char *argv[]) +{ + char size[256], target[4096], source[4096]; + char *p; + ssize_t r; + int fd; + + p = strchr(argv[0], 'x'); + if (!p) + return 1; + *p = '\0'; + stpcpy(size, argv[0]); + *p = 'x'; + + p = &p[strcspn(p, "-/")]; + if (!p) + return 1; + p = stpcpy(stpcpy(source, "scalable"), p); + if (strcmp(&p[-4], ".png")) + return 1; + stpcpy(&p[-4], ".svg"); + + for (p = argv[0]; (p = strchr(p, '/')); p++) { + *p = '\0'; + if (mkdir(argv[0], 0777) && errno != EEXIST) { + fprintf(stderr, "%s: mkdir %s 0777: %s\n", argv0, argv[0], strerror(errno)); + return 1; + } + *p = '/'; + } + + r = readlink(source, target, sizeof(target) - 1); + if (r >= 0) + target[r] = 0; + if (r >= 0 && (r >= sizeof(target) - 1 || r < 4 || strcmp(&target[r - 4], ".svg"))) { + return 1; + } else if (r < 0 && errno == EINVAL) { + fd = open(argv[0], O_WRONLY | O_CREAT | O_TRUNC, 0666); + if (fd < 0) { + fprintf(stderr, "%s: open %s O_WRONLY|O_CREAT|O_TRUNC 0666: %s\n", argv0, argv[0], strerror(errno)); + return 1; + } + if (fd != STDOUT_FILENO) { + if (dup2(fd, STDOUT_FILENO) != STDOUT_FILENO) + fprintf(stderr, "%s: dup2 %i 1: %s\n", argv0, fd, strerror(errno)); + close(fd); + } + execlp("rsvg-convert", "rsvg-convert", "-w", size, "-h", size, "-f", "png", source, NULL); + fprintf(stderr, "%s: execvp rsvg-convert: %s\n", argv0, strerror(errno)); + return 1; + } else if (r < 0) { + fprintf(stderr, "%s: readlink %s: %s\n", argv0, source, strerror(errno)); + return 1; + } else { + stpcpy(&target[r - 4], ".png"); + if (symlink(target, argv[0])) { + if (errno == EEXIST) { + unlink(argv[0]); + if (!symlink(target, argv[0])) + return 0; + } + fprintf(stderr, "%s: symlink %s %s: %s\n", argv0, target, argv[0], strerror(errno)); + return 1; + } + return 0; + } +} + + +static int +multi(int argc, char *argv[]) +{ + char *source, output[4096], target[4096]; + char *p, *q; + pid_t pid; + int status, fd, i; + ssize_t r; + + source = *argv++, argc--; + + q = &source[strcspn(source, "-/")]; + if (!q) + return 1; + + for (i = 0; i < argc; i++) { + stpcpy(stpcpy(stpcpy(stpcpy(output, argv[i]), "x"), argv[i]), q); + for (p = output; (p = strchr(p, '/')); p++) { + *p = '\0'; + if (mkdir(output, 0777) && errno != EEXIST) { + fprintf(stderr, "%s: mkdir %s 0777: %s\n", argv0, output, strerror(errno)); + return 1; + } + *p = '/'; + } + } + + r = readlink(source, target, sizeof(target) - 1); + if (r >= 0) + target[r] = 0; + if (r >= 0 && (r >= sizeof(target) - 1 || r < 4 || strcmp(&target[r - 4], ".svg"))) { + return 1; + } else if (r < 0 && errno == EINVAL) { + p = stpcpy(stpcpy(stpcpy(stpcpy(output, argv[0]), "x"), argv[0]), q); + stpcpy(&p[-4], ".png"); + for (; *argv; argv++, argc--) { + pid = argc == 1 ? 0 : fork(); + if (pid == -1) { + fprintf(stderr, "%s: fork: %s\n", argv0, strerror(errno)); + return 1; + } + if (pid) { + p = stpcpy(stpcpy(stpcpy(stpcpy(output, argv[1]), "x"), argv[1]), q); + stpcpy(&p[-4], ".png"); + if (waitpid(pid, &status, 0) != pid) { + fprintf(stderr, "%s: waitpid rsvg-convert: %s\n", argv0, strerror(errno)); + return 1; + } + if (status) + return 1; + continue; + } + fd = open(output, O_WRONLY | O_CREAT | O_TRUNC, 0666); + if (fd < 0) { + fprintf(stderr, "%s: open %s O_WRONLY|O_CREAT|O_TRUNC 0666: %s\n", argv0, output, strerror(errno)); + return 1; + } + if (fd != STDOUT_FILENO) { + if (dup2(fd, STDOUT_FILENO) != STDOUT_FILENO) + fprintf(stderr, "%s: dup2 %i 1: %s\n", argv0, fd, strerror(errno)); + close(fd); + } + execlp("rsvg-convert", "rsvg-convert", "-w", *argv, "-h", *argv, "-f", "png", source, NULL); + fprintf(stderr, "%s: execvp rsvg-convert: %s\n", argv0, strerror(errno)); + return 1; + } + } else if (r < 0) { + fprintf(stderr, "%s: readlink %s: %s\n", argv0, source, strerror(errno)); + return 1; + } else { + stpcpy(&target[r - 4], ".png"); + for (; *argv; argv++) { + p = stpcpy(stpcpy(stpcpy(stpcpy(output, *argv), "x"), *argv), q); + stpcpy(&p[-4], ".png"); + if (symlink(target, output)) { + if (errno == EEXIST) { + unlink(output); + if (!symlink(target, output)) + continue; + } + fprintf(stderr, "%s: symlink %s %s: %s\n", argv0, target, output, strerror(errno)); + return 1; + } + } + return 0; + } +} + + +int +main(int argc, char *argv[]) +{ + argv0 = *argv++, argc--; + if (argc == 1) + return single(argc, argv); + if (argc > 1) + return multi(argc, argv); + return 1; +} |