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 1111d9d2 2022-10-06 src #define MAX_FILENAME 4096
 10 1111d9d2 2022-10-06 src 
 11 becabb0c 2023-03-12 aa_src int aflag = 0;
 12 becabb0c 2023-03-12 aa_src int iflag = 0;
 13 becabb0c 2023-03-12 aa_src int lflag = 0;
 14 becabb0c 2023-03-12 aa_src int nflag = 0;
 15 becabb0c 2023-03-12 aa_src int oflag = 0;
 16 becabb0c 2023-03-12 aa_src int vflag = 0;
 17 1111d9d2 2022-10-06 src char new[MAX_FILENAME], *newe = new + MAX_FILENAME-1;
 18 b79428b4 2022-07-13 src 
 19 b79428b4 2022-07-13 src void
 20 66390331 2022-09-30 src warn(const char *fmt, ...)
 21 b79428b4 2022-07-13 src {
 22 66390331 2022-09-30 src 	char *w = strerror(errno);
 23 66390331 2022-09-30 src 	fputs("rene: ", stderr);
 24 b79428b4 2022-07-13 src 	if (fmt != NULL) {
 25 b79428b4 2022-07-13 src 		va_list argp;
 26 b79428b4 2022-07-13 src 		va_start(argp, fmt);
 27 b79428b4 2022-07-13 src 		vfprintf(stderr, fmt, argp);
 28 b79428b4 2022-07-13 src 		va_end(argp);
 29 b79428b4 2022-07-13 src 	}
 30 66390331 2022-09-30 src 	fprintf(stderr, ": %s\n", w);
 31 b79428b4 2022-07-13 src }
 32 b79428b4 2022-07-13 src 
 33 1e12e95d 2022-09-30 src void
 34 1e12e95d 2022-09-30 src err(int eval, const char *fmt, ...)
 35 1e12e95d 2022-09-30 src {
 36 1e12e95d 2022-09-30 src 	char *w = strerror(errno);
 37 1e12e95d 2022-09-30 src 	fputs("rene: ", stderr);
 38 1e12e95d 2022-09-30 src 	if (fmt != NULL) {
 39 1e12e95d 2022-09-30 src 		va_list argp;
 40 1e12e95d 2022-09-30 src 		va_start(argp, fmt);
 41 1e12e95d 2022-09-30 src 		vfprintf(stderr, fmt, argp);
 42 1e12e95d 2022-09-30 src 		va_end(argp);
 43 1e12e95d 2022-09-30 src 	}
 44 1e12e95d 2022-09-30 src 	fprintf(stderr, ": %s\n", w);
 45 1e12e95d 2022-09-30 src 	exit(eval);
 46 1e12e95d 2022-09-30 src }
 47 1e12e95d 2022-09-30 src 
 48 1111d9d2 2022-10-06 src void
 49 1111d9d2 2022-10-06 src errx(int eval, const char *fmt, ...)
 50 1111d9d2 2022-10-06 src {
 51 1111d9d2 2022-10-06 src 	fputs("rene: ", stderr);
 52 1111d9d2 2022-10-06 src 	if (fmt != NULL) {
 53 1111d9d2 2022-10-06 src 		va_list argp;
 54 1111d9d2 2022-10-06 src 		va_start(argp, fmt);
 55 1111d9d2 2022-10-06 src 		vfprintf(stderr, fmt, argp);
 56 1111d9d2 2022-10-06 src 		va_end(argp);
 57 1111d9d2 2022-10-06 src 	}
 58 1111d9d2 2022-10-06 src 	fputc('\n', stderr);
 59 1111d9d2 2022-10-06 src 	exit(eval);
 60 1111d9d2 2022-10-06 src }
 61 1111d9d2 2022-10-06 src 
 62 b79428b4 2022-07-13 src int
 63 1111d9d2 2022-10-06 src ren(char *from, char *to, char *f)
 64 b79428b4 2022-07-13 src {
 65 becabb0c 2023-03-12 aa_src 	int y = !oflag;
 66 1111d9d2 2022-10-06 src 
 67 1111d9d2 2022-10-06 src 	char *p = strrchr(f, '/');
 68 b79428b4 2022-07-13 src 	if (p) {
 69 b79428b4 2022-07-13 src 		if (*++p == '\0')
 70 1111d9d2 2022-10-06 src 			return 1;
 71 b79428b4 2022-07-13 src 	} else
 72 1111d9d2 2022-10-06 src 		p = f;
 73 1111d9d2 2022-10-06 src 	if (!(p = strstr(p, from)))
 74 1111d9d2 2022-10-06 src 		return 1;
 75 b79428b4 2022-07-13 src 	int fromlen = strlen(from);
 76 becabb0c 2023-03-12 aa_src 	if (lflag)
 77 1111d9d2 2022-10-06 src 		for(char *x; (x = strstr(p+fromlen, from)); p = x)
 78 1111d9d2 2022-10-06 src 			;
 79 b79428b4 2022-07-13 src 
 80 1111d9d2 2022-10-06 src 	char *fp = f;
 81 1111d9d2 2022-10-06 src 	char *newp = new;
 82 b79428b4 2022-07-13 src 	char *top = to;
 83 1111d9d2 2022-10-06 src 	for (;;) {
 84 1111d9d2 2022-10-06 src 		for (; fp != p; *newp++ = *fp++)
 85 1111d9d2 2022-10-06 src 			if (newp == newe)
 86 1111d9d2 2022-10-06 src toolong:
 87 1111d9d2 2022-10-06 src 				errx(1, "%s: final file name is too long", f);
 88 1111d9d2 2022-10-06 src 		if (!*fp)
 89 1111d9d2 2022-10-06 src 			break;
 90 1111d9d2 2022-10-06 src 		for (top = to; *top != '\0'; *newp++ = *top++)
 91 1111d9d2 2022-10-06 src 			if (newp == newe)
 92 1111d9d2 2022-10-06 src 				goto toolong;
 93 1111d9d2 2022-10-06 src 		fp += fromlen;
 94 becabb0c 2023-03-12 aa_src 		if (!aflag || !(p = strstr(fp, from)))
 95 1111d9d2 2022-10-06 src 			p = strchr(fp, '\0');
 96 b79428b4 2022-07-13 src 	}
 97 b79428b4 2022-07-13 src 	*newp = '\0';
 98 b79428b4 2022-07-13 src 
 99 becabb0c 2023-03-12 aa_src 	if (iflag && access(new, F_OK) == 0) {
100 1111d9d2 2022-10-06 src 		fprintf(stderr, "replace %s with %s? ", from, to);
101 1111d9d2 2022-10-06 src 		y = getchar() == 'y';
102 1111d9d2 2022-10-06 src 	}
103 becabb0c 2023-03-12 aa_src 	if (y && !nflag && !(y += rename(f, new))) {
104 66390331 2022-09-30 src 		warn("rename");
105 1111d9d2 2022-10-06 src 		return 0;
106 1111d9d2 2022-10-06 src 	}
107 becabb0c 2023-03-12 aa_src 	if (vflag && y)
108 b79428b4 2022-07-13 src 		printf("%s -> %s\n", f, new);
109 1111d9d2 2022-10-06 src 	return 1;
110 b79428b4 2022-07-13 src }
111 b79428b4 2022-07-13 src 
112 66390331 2022-09-30 src void
113 66390331 2022-09-30 src usage(void)
114 66390331 2022-09-30 src {
115 66390331 2022-09-30 src 	fputs("usage: rene [-ailnov] from to file ...\n", stderr);
116 66390331 2022-09-30 src 	exit(EXIT_FAILURE);
117 66390331 2022-09-30 src }
118 66390331 2022-09-30 src 
119 b79428b4 2022-07-13 src int
120 b79428b4 2022-07-13 src main(int argc, char *argv[])
121 b79428b4 2022-07-13 src {
122 1111d9d2 2022-10-06 src 	int c, ret = 0;
123 1e12e95d 2022-09-30 src #ifdef __OpenBSD__
124 1e12e95d 2022-09-30 src 	if (pledge("stdio cpath rpath", NULL) == -1)
125 1e12e95d 2022-09-30 src 		err(1, "pledge");
126 1e12e95d 2022-09-30 src #endif
127 b79428b4 2022-07-13 src 	while ((c = getopt(argc, argv, "ailnov")) != -1) {
128 b79428b4 2022-07-13 src 		switch (c) {
129 b79428b4 2022-07-13 src 		case 'a':
130 becabb0c 2023-03-12 aa_src 			aflag = 1;
131 b79428b4 2022-07-13 src 			break;
132 b79428b4 2022-07-13 src 		case 'i':
133 becabb0c 2023-03-12 aa_src 			iflag = 1;
134 b79428b4 2022-07-13 src 			break;
135 b79428b4 2022-07-13 src 		case 'l':
136 becabb0c 2023-03-12 aa_src 			lflag = 1;
137 b79428b4 2022-07-13 src 			break;
138 b79428b4 2022-07-13 src 		case 'n':
139 becabb0c 2023-03-12 aa_src 			nflag = 1;
140 b79428b4 2022-07-13 src 			break;
141 b79428b4 2022-07-13 src 		case 'o':
142 becabb0c 2023-03-12 aa_src 			oflag = 1;
143 b79428b4 2022-07-13 src 			break;
144 b79428b4 2022-07-13 src 		case 'v':
145 becabb0c 2023-03-12 aa_src 			vflag = 1;
146 b79428b4 2022-07-13 src 			break;
147 b79428b4 2022-07-13 src 		default:
148 b79428b4 2022-07-13 src 			usage();
149 b79428b4 2022-07-13 src 		}
150 b79428b4 2022-07-13 src 	}
151 b79428b4 2022-07-13 src 	argc -= optind;
152 b79428b4 2022-07-13 src 	argv += optind;
153 b79428b4 2022-07-13 src 
154 1111d9d2 2022-10-06 src 	if (argc < 3 || !argv[0] || !argv[1] || !argv[0][0])
155 b79428b4 2022-07-13 src 		usage();
156 b79428b4 2022-07-13 src 	for (int i = 2; i < argc; i++)
157 1111d9d2 2022-10-06 src 		if (!ren(argv[0], argv[1], argv[i]))
158 1111d9d2 2022-10-06 src 			ret = 1;
159 1111d9d2 2022-10-06 src 	return ret;
160 b79428b4 2022-07-13 src }