[359] | 1 | |
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| 2 | /* |
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| 3 | * SUBS.C |
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| 4 | * |
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| 5 | * Copyright 1994 Matthew Dillon (dillon@apollo.backplane.com) |
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| 6 | * May be distributed under the GNU General Public License |
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| 7 | */ |
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| 8 | |
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| 9 | #include "defs.h" |
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| 10 | |
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| 11 | Prototype void logn(int level, const char *ctl, ...); |
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| 12 | Prototype void log9(const char *ctl, ...); |
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| 13 | Prototype void logfd(int fd, const char *ctl, ...); |
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| 14 | Prototype void fdprintf(int fd, const char *ctl, ...); |
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| 15 | Prototype int ChangeUser(const char *user, short dochdir); |
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| 16 | Prototype void vlog(int level, int fd, const char *ctl, va_list va); |
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| 17 | Prototype int slog(char *buf, const char *ctl, int nmax, va_list va, short useDate); |
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| 18 | |
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| 19 | extern short LogLevel; |
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| 20 | |
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| 21 | void |
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| 22 | log9(const char *ctl, ...) |
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| 23 | { |
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| 24 | va_list va; |
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| 25 | |
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| 26 | va_start(va, ctl); |
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| 27 | vlog(9, 2, ctl, va); |
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| 28 | va_end(va); |
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| 29 | } |
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| 30 | |
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| 31 | void |
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| 32 | logn(int level, const char *ctl, ...) |
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| 33 | { |
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| 34 | va_list va; |
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| 35 | |
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| 36 | va_start(va, ctl); |
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| 37 | vlog(level, 2, ctl, va); |
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| 38 | va_end(va); |
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| 39 | } |
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| 40 | |
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| 41 | void |
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| 42 | logfd(int fd, const char *ctl, ...) |
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| 43 | { |
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| 44 | va_list va; |
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| 45 | |
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| 46 | va_start(va, ctl); |
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| 47 | vlog(9, fd, ctl, va); |
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| 48 | va_end(va); |
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| 49 | } |
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| 50 | |
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| 51 | void |
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| 52 | fdprintf(int fd, const char *ctl, ...) |
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| 53 | { |
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| 54 | va_list va; |
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| 55 | char buf[2048]; |
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| 56 | |
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| 57 | va_start(va, ctl); |
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| 58 | vsnprintf(buf, sizeof(buf), ctl, va); |
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| 59 | write(fd, buf, strlen(buf)); |
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| 60 | va_end(va); |
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| 61 | } |
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| 62 | |
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| 63 | void |
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| 64 | vlog(int level, int fd, const char *ctl, va_list va) |
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| 65 | { |
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| 66 | char buf[2048]; |
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| 67 | short n; |
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| 68 | static short useDate = 1; |
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| 69 | |
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| 70 | if (level >= LogLevel) { |
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| 71 | write(fd, buf, n = slog(buf, ctl, sizeof(buf), va, useDate)); |
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| 72 | useDate = (n && buf[n-1] == '\n'); |
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| 73 | } |
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| 74 | } |
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| 75 | |
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| 76 | int |
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| 77 | slog(char *buf, const char *ctl, int nmax, va_list va, short useDate) |
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| 78 | { |
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| 79 | time_t t = time(NULL); |
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| 80 | struct tm *tp = localtime(&t); |
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| 81 | |
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| 82 | buf[0] = 0; |
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| 83 | if (useDate) |
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| 84 | strftime(buf, 128, "%d-%b-%y %H:%M ", tp); |
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| 85 | vsnprintf(buf + strlen(buf), nmax, ctl, va); |
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| 86 | return(strlen(buf)); |
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| 87 | } |
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| 88 | |
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| 89 | int |
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| 90 | ChangeUser(const char *user, short dochdir) |
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| 91 | { |
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| 92 | struct passwd *pas; |
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| 93 | |
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| 94 | /* |
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| 95 | * Obtain password entry and change privilages |
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| 96 | */ |
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| 97 | |
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| 98 | if ((pas = getpwnam(user)) == 0) { |
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| 99 | logn(9, "failed to get uid for %s", user); |
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| 100 | return(-1); |
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| 101 | } |
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| 102 | setenv("USER", pas->pw_name, 1); |
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| 103 | setenv("HOME", pas->pw_dir, 1); |
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| 104 | setenv("SHELL", "/bin/sh", 1); |
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| 105 | |
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| 106 | /* |
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| 107 | * Change running state to the user in question |
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| 108 | */ |
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| 109 | |
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| 110 | if (initgroups(user, pas->pw_gid) < 0) { |
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| 111 | logn(9, "initgroups failed: %s %s", user, strerror(errno)); |
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| 112 | return(-1); |
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| 113 | } |
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| 114 | if (setregid(pas->pw_gid, pas->pw_gid) < 0) { |
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| 115 | logn(9, "setregid failed: %s %d", user, pas->pw_gid); |
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| 116 | return(-1); |
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| 117 | } |
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| 118 | if (setreuid(pas->pw_uid, pas->pw_uid) < 0) { |
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| 119 | logn(9, "setreuid failed: %s %d", user, pas->pw_uid); |
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| 120 | return(-1); |
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| 121 | } |
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| 122 | if (dochdir) { |
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| 123 | if (chdir(pas->pw_dir) < 0) { |
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| 124 | logn(8, "chdir failed: %s %s", user, pas->pw_dir); |
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| 125 | if (chdir(TMPDIR) < 0) { |
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| 126 | logn(9, "chdir failed: %s %s", user, pas->pw_dir); |
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| 127 | logn(9, "chdir failed: %s " TMPDIR, user); |
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| 128 | return(-1); |
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| 129 | } |
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| 130 | } |
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| 131 | } |
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| 132 | return(pas->pw_uid); |
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| 133 | } |
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| 134 | |
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| 135 | #if 0 |
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| 136 | |
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| 137 | char * |
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| 138 | strdup(const char *str) |
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| 139 | { |
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| 140 | char *ptr = malloc(strlen(str) + 1); |
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| 141 | |
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| 142 | if (ptr) |
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| 143 | strcpy(ptr, str); |
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| 144 | return(ptr); |
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| 145 | } |
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| 146 | |
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| 147 | #endif |
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