1 66390331 2022-09-30 src #include <errno.h>
  2 b79428b4 2022-07-13 src #include <stdarg.h>
  3 c1ec7947 2022-10-20 src #include <stdint.h>
  4 b79428b4 2022-07-13 src #include <stdio.h>
  5 b79428b4 2022-07-13 src #include <stdlib.h>
  6 b79428b4 2022-07-13 src #include <string.h>
  7 b79428b4 2022-07-13 src #include <unistd.h>
  8 b79428b4 2022-07-13 src 
  9 66390331 2022-09-30 src #define O_INTERACTIVE 1
 10 66390331 2022-09-30 src #define O_NOACT (1<<1)
 11 66390331 2022-09-30 src #define O_NOOVERRIDE (1<<2)
 12 66390331 2022-09-30 src #define O_REPLACEALL (1<<3)
 13 66390331 2022-09-30 src #define O_REPLACELAST (1<<4)
 14 66390331 2022-09-30 src #define O_VERBOSE (1<<5)
 15 b79428b4 2022-07-13 src 
 16 1111d9d2 2022-10-06 src #define MAX_FILENAME 4096
 17 1111d9d2 2022-10-06 src 
 18 66390331 2022-09-30 src uint8_t opts;
 19 1111d9d2 2022-10-06 src char new[MAX_FILENAME], *newe = new + MAX_FILENAME-1;
 20 b79428b4 2022-07-13 src 
 21 b79428b4 2022-07-13 src void
 22 66390331 2022-09-30 src warn(const char *fmt, ...)
 23 b79428b4 2022-07-13 src {
 24 66390331 2022-09-30 src 	char *w = strerror(errno);
 25 66390331 2022-09-30 src 	fputs("rene: ", stderr);
 26 b79428b4 2022-07-13 src 	if (fmt != NULL) {
 27 b79428b4 2022-07-13 src 		va_list argp;
 28 b79428b4 2022-07-13 src 		va_start(argp, fmt);
 29 b79428b4 2022-07-13 src 		vfprintf(stderr, fmt, argp);
 30 b79428b4 2022-07-13 src 		va_end(argp);
 31 b79428b4 2022-07-13 src 	}
 32 66390331 2022-09-30 src 	fprintf(stderr, ": %s\n", w);
 33 b79428b4 2022-07-13 src }
 34 b79428b4 2022-07-13 src 
 35 1e12e95d 2022-09-30 src void
 36 1e12e95d 2022-09-30 src err(int eval, const char *fmt, ...)
 37 1e12e95d 2022-09-30 src {
 38 1e12e95d 2022-09-30 src 	char *w = strerror(errno);
 39 1e12e95d 2022-09-30 src 	fputs("rene: ", stderr);
 40 1e12e95d 2022-09-30 src 	if (fmt != NULL) {
 41 1e12e95d 2022-09-30 src 		va_list argp;
 42 1e12e95d 2022-09-30 src 		va_start(argp, fmt);
 43 1e12e95d 2022-09-30 src 		vfprintf(stderr, fmt, argp);
 44 1e12e95d 2022-09-30 src 		va_end(argp);
 45 1e12e95d 2022-09-30 src 	}
 46 1e12e95d 2022-09-30 src 	fprintf(stderr, ": %s\n", w);
 47 1e12e95d 2022-09-30 src 	exit(eval);
 48 1e12e95d 2022-09-30 src }
 49 1e12e95d 2022-09-30 src 
 50 1111d9d2 2022-10-06 src void
 51 1111d9d2 2022-10-06 src errx(int eval, const char *fmt, ...)
 52 1111d9d2 2022-10-06 src {
 53 1111d9d2 2022-10-06 src 	fputs("rene: ", stderr);
 54 1111d9d2 2022-10-06 src 	if (fmt != NULL) {
 55 1111d9d2 2022-10-06 src 		va_list argp;
 56 1111d9d2 2022-10-06 src 		va_start(argp, fmt);
 57 1111d9d2 2022-10-06 src 		vfprintf(stderr, fmt, argp);
 58 1111d9d2 2022-10-06 src 		va_end(argp);
 59 1111d9d2 2022-10-06 src 	}
 60 1111d9d2 2022-10-06 src 	fputc('\n', stderr);
 61 1111d9d2 2022-10-06 src 	exit(eval);
 62 1111d9d2 2022-10-06 src }
 63 1111d9d2 2022-10-06 src 
 64 b79428b4 2022-07-13 src int
 65 1111d9d2 2022-10-06 src ren(char *from, char *to, char *f)
 66 b79428b4 2022-07-13 src {
 67 1111d9d2 2022-10-06 src 	int y = !(opts & O_NOOVERRIDE);
 68 1111d9d2 2022-10-06 src 
 69 1111d9d2 2022-10-06 src 	char *p = strrchr(f, '/');
 70 b79428b4 2022-07-13 src 	if (p) {
 71 b79428b4 2022-07-13 src 		if (*++p == '\0')
 72 1111d9d2 2022-10-06 src 			return 1;
 73 b79428b4 2022-07-13 src 	} else
 74 1111d9d2 2022-10-06 src 		p = f;
 75 1111d9d2 2022-10-06 src 	if (!(p = strstr(p, from)))
 76 1111d9d2 2022-10-06 src 		return 1;
 77 b79428b4 2022-07-13 src 	int fromlen = strlen(from);
 78 1111d9d2 2022-10-06 src 	if (opts & O_REPLACELAST)
 79 1111d9d2 2022-10-06 src 		for(char *x; (x = strstr(p+fromlen, from)); p = x)
 80 1111d9d2 2022-10-06 src 			;
 81 b79428b4 2022-07-13 src 
 82 1111d9d2 2022-10-06 src 	char *fp = f;
 83 1111d9d2 2022-10-06 src 	char *newp = new;
 84 b79428b4 2022-07-13 src 	char *top = to;
 85 1111d9d2 2022-10-06 src 	for (;;) {
 86 1111d9d2 2022-10-06 src 		for (; fp != p; *newp++ = *fp++)
 87 1111d9d2 2022-10-06 src 			if (newp == newe)
 88 1111d9d2 2022-10-06 src toolong:
 89 1111d9d2 2022-10-06 src 				errx(1, "%s: final file name is too long", f);
 90 1111d9d2 2022-10-06 src 		if (!*fp)
 91 1111d9d2 2022-10-06 src 			break;
 92 1111d9d2 2022-10-06 src 		for (top = to; *top != '\0'; *newp++ = *top++)
 93 1111d9d2 2022-10-06 src 			if (newp == newe)
 94 1111d9d2 2022-10-06 src 				goto toolong;
 95 1111d9d2 2022-10-06 src 		fp += fromlen;
 96 1111d9d2 2022-10-06 src 		if (!(opts & O_REPLACEALL) || !(p = strstr(fp, from)))
 97 1111d9d2 2022-10-06 src 			p = strchr(fp, '\0');
 98 b79428b4 2022-07-13 src 	}
 99 b79428b4 2022-07-13 src 	*newp = '\0';
100 b79428b4 2022-07-13 src 
101 1111d9d2 2022-10-06 src 	if (opts & O_INTERACTIVE && access(new, F_OK) == 0) {
102 1111d9d2 2022-10-06 src 		fprintf(stderr, "replace %s with %s? ", from, to);
103 1111d9d2 2022-10-06 src 		y = getchar() == 'y';
104 1111d9d2 2022-10-06 src 	}
105 1111d9d2 2022-10-06 src 	if (y && !(opts & O_NOACT) && !(y += rename(f, new))) {
106 66390331 2022-09-30 src 		warn("rename");
107 1111d9d2 2022-10-06 src 		return 0;
108 1111d9d2 2022-10-06 src 	}
109 1111d9d2 2022-10-06 src 	if (opts & O_VERBOSE && y)
110 b79428b4 2022-07-13 src 		printf("%s -> %s\n", f, new);
111 1111d9d2 2022-10-06 src 	return 1;
112 b79428b4 2022-07-13 src }
113 b79428b4 2022-07-13 src 
114 66390331 2022-09-30 src void
115 66390331 2022-09-30 src usage(void)
116 66390331 2022-09-30 src {
117 66390331 2022-09-30 src 	fputs("usage: rene [-ailnov] from to file ...\n", stderr);
118 66390331 2022-09-30 src 	exit(EXIT_FAILURE);
119 66390331 2022-09-30 src }
120 66390331 2022-09-30 src 
121 b79428b4 2022-07-13 src int
122 b79428b4 2022-07-13 src main(int argc, char *argv[])
123 b79428b4 2022-07-13 src {
124 1111d9d2 2022-10-06 src 	int c, ret = 0;
125 1e12e95d 2022-09-30 src #ifdef __OpenBSD__
126 1e12e95d 2022-09-30 src 	if (pledge("stdio cpath rpath", NULL) == -1)
127 1e12e95d 2022-09-30 src 		err(1, "pledge");
128 1e12e95d 2022-09-30 src #endif
129 b79428b4 2022-07-13 src 	while ((c = getopt(argc, argv, "ailnov")) != -1) {
130 b79428b4 2022-07-13 src 		switch (c) {
131 b79428b4 2022-07-13 src 		case 'a':
132 66390331 2022-09-30 src 			opts |= O_REPLACEALL;
133 b79428b4 2022-07-13 src 			break;
134 b79428b4 2022-07-13 src 		case 'i':
135 66390331 2022-09-30 src 			opts |= O_INTERACTIVE;
136 b79428b4 2022-07-13 src 			break;
137 b79428b4 2022-07-13 src 		case 'l':
138 66390331 2022-09-30 src 			opts |= O_REPLACELAST;
139 b79428b4 2022-07-13 src 			break;
140 b79428b4 2022-07-13 src 		case 'n':
141 66390331 2022-09-30 src 			opts |= O_NOACT;
142 b79428b4 2022-07-13 src 			break;
143 b79428b4 2022-07-13 src 		case 'o':
144 66390331 2022-09-30 src 			opts |= O_NOOVERRIDE;
145 b79428b4 2022-07-13 src 			break;
146 b79428b4 2022-07-13 src 		case 'v':
147 66390331 2022-09-30 src 			opts |= O_VERBOSE;
148 b79428b4 2022-07-13 src 			break;
149 b79428b4 2022-07-13 src 		default:
150 b79428b4 2022-07-13 src 			usage();
151 b79428b4 2022-07-13 src 		}
152 b79428b4 2022-07-13 src 	}
153 b79428b4 2022-07-13 src 	argc -= optind;
154 b79428b4 2022-07-13 src 	argv += optind;
155 b79428b4 2022-07-13 src 
156 1111d9d2 2022-10-06 src 	if (argc < 3 || !argv[0] || !argv[1] || !argv[0][0])
157 b79428b4 2022-07-13 src 		usage();
158 b79428b4 2022-07-13 src 	for (int i = 2; i < argc; i++)
159 1111d9d2 2022-10-06 src 		if (!ren(argv[0], argv[1], argv[i]))
160 1111d9d2 2022-10-06 src 			ret = 1;
161 1111d9d2 2022-10-06 src 	return ret;
162 b79428b4 2022-07-13 src }